WO2004086565A1 - 異方導電性コネクターおよび導電性ペースト組成物、プローブ部材並びにウエハ検査装置およびウエハ検査方法 - Google Patents
異方導電性コネクターおよび導電性ペースト組成物、プローブ部材並びにウエハ検査装置およびウエハ検査方法 Download PDFInfo
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- WO2004086565A1 WO2004086565A1 PCT/JP2004/003931 JP2004003931W WO2004086565A1 WO 2004086565 A1 WO2004086565 A1 WO 2004086565A1 JP 2004003931 W JP2004003931 W JP 2004003931W WO 2004086565 A1 WO2004086565 A1 WO 2004086565A1
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- conductive
- anisotropic conductive
- wafer
- connector
- particles
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
- H01R11/01—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts characterised by the form or arrangement of the conductive interconnection between the connecting locations
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/02—General constructional details
- G01R1/06—Measuring leads; Measuring probes
- G01R1/067—Measuring probes
- G01R1/073—Multiple probes
- G01R1/07307—Multiple probes with individual probe elements, e.g. needles, cantilever beams or bump contacts, fixed in relation to each other, e.g. bed of nails fixture or probe card
- G01R1/0735—Multiple probes with individual probe elements, e.g. needles, cantilever beams or bump contacts, fixed in relation to each other, e.g. bed of nails fixture or probe card arranged on a flexible frame or film
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/02—Contact members
- H01R13/22—Contacts for co-operating by abutting
- H01R13/24—Contacts for co-operating by abutting resilient; resiliently-mounted
- H01R13/2407—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means
- H01R13/2414—Contacts for co-operating by abutting resilient; resiliently-mounted characterized by the resilient means conductive elastomers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/48—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor
- H01L23/488—Arrangements for conducting electric current to or from the solid state body in operation, e.g. leads, terminal arrangements ; Selection of materials therefor consisting of soldered or bonded constructions
- H01L23/498—Leads, i.e. metallisations or lead-frames on insulating substrates, e.g. chip carriers
- H01L23/49827—Via connections through the substrates, e.g. pins going through the substrate, coaxial cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/0001—Technical content checked by a classifier
- H01L2924/0002—Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
Definitions
- a large number of integrated circuits are formed on a wafer made of, for example, silicon, and then each of these integrated circuits is inspected for basic electrical characteristics to have a defect.
- a probe test for selecting an integrated circuit is performed. This probe test is performed, for example, in a temperature environment of 85 ° C.
- a semiconductor chip is formed by cutting the chip, and the semiconductor chip is housed in the nozzle package of [1] and sealed.
- a burn-in test for selecting a semiconductor integrated circuit device having a potential defect by inspecting electrical characteristics in, for example, a high temperature iUTF of 125 ° C. is performed. Done.
- a probe member In an electrical inspection of an integrated circuit such as a prop test or a noise test, a probe member is used to electrically connect each of the electrodes to be inspected on an inspection object to a tester. Such a probe member corresponds to the pattern of the electrode to be inspected. 2. Description of the Related Art There is known an inspection circuit board having an inspection electrode formed according to a pattern and an anisotropic conductive elastomer sheet disposed on the inspection circuit board.
- An anisotropic conductive elastomer sheet (hereinafter, referred to as a “distributed anisotropic conductive elastomer sheet”) formed by forming an insulating portion that surrounds them is disclosed.
- Document 3 and the like disclose an unevenly distributed anisotropic conductive elastomer sheet in which a step is formed between the surface of a conductive portion and an insulating portion.
- the burn-in test since the integrated circuit devices to be inspected are very small and inconvenient to handle, it is necessary to perform electrical inspections of many integrated circuit devices individually. It takes a long time, which results in considerably higher inspection costs. For this reason, the WLBI (Wafer Lebel Burn-in) test, in which a large number of integrated circuits formed on a wafer are subjected to a burn-in test at the same time in a wafer state, has been performed ⁇ ! 3 ⁇ 4. Have been.
- WLBI Wafer Lebel Burn-in
- the anisotropic conductive elastomer sheet used for the probe member for performing the WL BI test may be, for example, 50%. Durability that can be used repeatedly 0 times or more is required. On the other hand, if the conventional anisotropic conductive elastomer sheet is used repeatedly more than 200 times, for example, in the WL BI test, the conductivity of the conductive part will be significantly reduced. I could't do it and needed to replace it with a new one.
- the present invention has been made in view of the above circumstances, and a first object of the present invention is to repeatedly and repeatedly use a plurality of integrated circuits formed in a wafer in an electrical inspection. It is another object of the present invention to provide an anisotropic conductive connector that maintains good conductivity for a long period of time, and thus has high durability and a long service life.
- a second object of the present invention is to provide an electrical inspection of a plurality of integrated circuits formed on a wafer, even if the electrodes to be inspected of the integrated circuit formed on the wafer are projecting, many times.
- An object of the present invention is to provide an anisotropic conductive connector which maintains good conductivity for a long period of time when used repeatedly, and therefore has high durability and a long service life.
- a third object of the present invention is to repeatedly use a plurality of integrated circuits formed on a wafer many times, even if the electrical inspection is performed in a high-temperature environment.
- a fourth object of the present invention is that, in addition to the above object, when the integrated circuit formed on a wafer is repeatedly used many times in direct contact with the electrode to be inspected, it is suitable for a long time. It is an object of the present invention to provide an anisotropic conductive connector which maintains conductivity and therefore has high durability and a long service life.
- a fifth object of the present invention is to provide a circuit component having a long-term electrical inspection, even if the electrical inspection is performed in a high-temperature environment, even if the electrical inspection is performed repeatedly many times.
- An object of the present invention is to provide an anisotropic conductive connector which maintains good conductivity for a long time and therefore has high durability and a long service life.
- a sixth object of the present invention is to provide a conductive paste composition suitable for forming an elastic anisotropic conductive film in the above anisotropic conductive connector.
- a seventh object of the present invention is to maintain good conductivity for a long period of time when repeatedly used many times in electrical inspection of a plurality of integrated circuits formed on a wafer. Accordingly, an object of the present invention is to provide a probe member having high durability and a long service life.
- An eighth object of the present invention is to provide an inspection apparatus, an inspection apparatus, an inspection method, and an inspection method for performing an electrical inspection of an integrated circuit of m formed on a wafer in a wafer state by using the above-mentioned probe member. There is nothing to offer.
- the present inventors have conducted intensive studies on the cause of a significant decrease in the conductivity of the conductive portion when the anisotropic conductive connector is used repeatedly, and found that the gold constituting the coating layer of the conductive particles is a metal.
- the hardness of the skin is small, so as it is repeatedly used, the conductive coating particles come into contact with the conductive particles and the electrode to be inspected, so that As a result of exfoliation, abrasion, deformation, etc., it was found that core particles made of nickel or the like were exposed on the surface, thereby significantly reducing the conductivity of the conductive portion. Based on this finding, the present invention was completed. It is.
- An anisotropic conductive connector is directed to an anisotropic conductive connector having an anisotropic conductive film, in which a plurality of connection conductive portions extending in a thickness direction and containing conductive particles are formed.
- the conductive particles contained in the conductive part for connection are characterized in that a coating layer made of a highly conductive metal is laminated on the surface of core particles exhibiting magnetism, and the coating layer is a coating layer having high hardness.
- An anisotropic conductive connector according to the present invention includes an anisotropic conductive connector having an elastic anisotropic conductive film in which a plurality of connection conductive portions extending in a thickness direction and containing conductive particles are formed.
- the conductive particles contained in the conductive part for self-connection are obtained by laminating a plurality of coating layers made of a highly conductive metal on the surface of the core particles exhibiting ii properties, and at least the outermost layer of the plurality of coating layers by itself. Is characterized by being a hard coating layer. .
- the high hardness coating layer preferably has a Picker hardness (HV) of 40 or more.
- the anisotropic conductive connector of the present invention has a frame plate in which a hole for anisotropic conductive HE extending in the thickness direction is formed. It is preferable that an anisotropic conductive film is arranged and supported by the frame plate.
- the conductive base composition of the present invention is characterized by containing a polymer-forming material which is cured to become an elastic polymer substance, and the above-mentioned conductive particles.
- the linear thermal expansion coefficient of the frame plate in the anisotropic conductive connector is 3X. 1 0- 5 / K or less, Mongolian line of the substrate material constituting the circuit board for inspection 3 ⁇ 4!
- the Peng Zhang coefficient is less than or equal to 3 X 10 15 / K.
- the wafer inspection apparatus is a wafer inspection apparatus that performs an electrical inspection of each of a plurality of integrated circuits formed on a wafer in a wafer state.
- the above-mentioned probe member is provided, and electrical connection to an integrated circuit formed on a wafer to be inspected is achieved via the probe member.
- the conductive particles contained in the conductive portion for connection in the elastic anisotropic conductive film have, for example, a Pickers hardness (Hv) of 40 or more. Due to the high hardness of the coating layer, even when used repeatedly many times, for example, in the electrical inspection of integrated circuits formed on a wafer, even if the conductive particles are repeatedly used, contact between the conductive particles may occur.
- Hv Pickers hardness
- the coating layer from gold and other highly conductive materials, a conductive portion for connection having high conductivity can be obtained, and when used repeatedly in a high-temperature environment many times.
- deterioration of the surface of the conductive particles is suppressed, and as a result, required conductivity is maintained for a long period of time, and therefore, high durability and a long service life are obtained.
- the elastic anisotropic conductive film disposed in each of the holes for disposing the anisotropic conductive film of the frame plate has a small area. Since a small piece is sufficient, formation of each elastic anisotropic conductive film is easy.
- the elastic anisotropic conductive film having a small area and a small area has a small absolute amount of tension in the plane direction of the elastic anisotropic conductive film even if it is exposed.
- the thermal expansion in the surface direction of the elastic anisotropic conductive film is reliably restricted by the frame plate. Therefore, even when a probe test or a wafer-level burn-in test is performed on a large-area wafer, a good electrical connection state can be stably maintained.
- the elastic anisotropic conductive film in the anisotropic conductive connector 1 can be advantageously produced.
- the probe member of the present invention since the above-described anisotropic conductive connector is provided, good conductivity is maintained for a long period of time when used repeatedly for many times, High durability and long service life.
- the wafer inspection apparatus and the wafer inspection method of the present invention since the probe member having the anisotropic conductive connector having high durability and long service life is used, the wafer inspection is performed many times. In addition, it is possible to reduce the yield of replacing the anisotropic conductive connector with a new one, thereby enabling the wafer inspection to be performed with high efficiency and reducing the inspection cost. it can.
- FIG. 1 is a plan view showing an example of the anisotropic conductive connector according to the present invention.
- FIG. 2 is an enlarged plan view showing a part of the anisotropic conductive connector shown in FIG.
- FIG. 4 is an explanatory cross-sectional view showing an enlarged elastic anisotropic conductive film in the anisotropic conductive connector shown in FIG.
- FIG. 5 is an explanatory cross-sectional view showing a configuration of an apparatus for measuring an electric resistance value R.
- FIG. 7 is an explanatory cross-sectional view showing a metal mold for elastic anisotropic conductive molding in a partially enlarged manner.
- Figure 8 shows the frame plate placed through a spacer between the ⁇ mold and the lower mold of the mold shown in Figure 6.
- FIG. 4 is an explanatory cross-sectional view showing a state in which the cover is placed.
- FIG. 9 is an explanatory cross-sectional view showing a state where a molding material layer of a desired form is formed between an upper mold and a lower mold of a mold.
- FIG. 10 is an explanatory sectional view showing the molding material layer shown in FIG. 9 in an enlarged manner.
- FIG. 11 is an explanatory sectional view showing a state in which a magnetic field having an intensity distribution in the thickness direction is formed on the molding material layer shown in FIG.
- FIG. 12 is an explanatory cross-sectional view showing a configuration of an example of a wafer inspection apparatus using the anisotropic conductive connector 1 according to the present invention.
- FIG. 13 is an explanatory sectional view showing a configuration of a main part in an example of the probe member according to the present invention. '
- FIG. 14 is an explanatory cross-sectional view showing the configuration of another example of the wafer inspection apparatus using the anisotropic conductive connector according to the present invention.
- FIG. 16 is an enlarged plan view showing an elastic anisotropic conductive film in still another example of the anisotropic conductive connector according to the present invention.
- FIG. 17 is an explanatory sectional view showing the configuration of still another example of the wafer inspection apparatus using the anisotropic conductive connector according to the present invention.
- FIG. 18 is a top view of the test wafer used in the example.
- FIG. 19 is an explanatory diagram showing the position of the electrode area to be inspected of the integrated circuit formed on the test wafer shown in FIG.
- FIG. 20 is an explanatory diagram showing the electrodes to be inspected of the integrated circuit formed on the test wafer shown in FIG.
- FIG. 21 is a top view of the frame plate manufactured in Difficult Example 1.
- FIG. 22 is an explanatory diagram showing a part of the frame plate shown in FIG. 21 in an enlarged manner.
- FIG. 23 is an explanatory diagram showing an enlarged molding surface of the mold manufactured in Example 1.
- FIG. 26 is an explanatory diagram showing, on an enlarged scale, the molding surface of the mold prepared in Example 5. [Explanation of symbols]
- the anisotropic conductive connector 1 shown in FIG. 1 is used, for example, for a wafer on which a plurality of integrated circuits are formed, for performing electrical inspection of each of the integrated circuits in a wafer state. As shown in the figure, a plurality of anisotropic conductive film disposing holes 11 1 each extending through the thickness direction.
- the anisotropic conductive film placement hole 11 of the frame plate 10 is formed corresponding to the pattern of the electrode region of the wafer to be inspected where the electrode to be inspected of the integrated circuit is formed.
- an elastic anisotropic conductive film 20 having conductivity in the thickness direction is provided. 1 and are arranged independently of the elastic elastic anisotropic conductive film 20 adjacent thereto.
- the frame plate 10 in this example is provided between the anisotropic conductive connector and a member adjacent thereto.
- An air circulation hole 15 for flowing air is formed, and a positioning hole 16 for positioning the wafer to be inspected and the circuit board for inspection is formed.
- the elastic anisotropic conductive film 20 is formed of an elastic polymer material. As shown in FIG. 3, a plurality of connection conductive portions 22 extending in the thickness direction (the direction perpendicular to the paper surface in FIG. 3). Is formed around each of the connection conductive portions 22, and surrounds each of the connection conductive portions 22. A functional portion 21 formed around each of the conductive portions 22 for connection, and comprising a terminal edge portion 23 that ends each of the conductive portions 22 for connection with each other; Are arranged in the anisotropic conductive SISH mounting hole 11 of the frame plate 10.
- the conductive portion 22 for connection in the functional portion 21 is arranged according to a pattern corresponding to a pattern of an electrode to be inspected of an integrated circuit on a wafer to be inspected, and is electrically connected to the electrode to be inspected in the inspection of the wafer. It is connected to
- the protruding portions 2 protruding from the other surface are provided at positions where the connecting conductive portion 22 and the peripheral portion thereof are located. 4 is formed.
- the thickness of the frame plate 10 depends on the material thereof, but is preferably from 20 to 600 m, more preferably from 40 to 400 m.
- the thickness is less than 20 ⁇ m, the ⁇ S required when using an anisotropic conductive connector cannot be obtained, the durability tends to be low, and the shape of the frame plate 1 As a result, it is difficult to maintain the durability of the connector and the handleability of the anisotropic conductive connector is low.
- the thickness exceeds 600, the elastic anisotropic conductive film 20 formed in the anisotropic conductive film disposing hole 11 becomes excessively thick, and the connecting conductive portion In some cases, it may be difficult to obtain good conductivity in 22 and good paper quality between adjacent connecting conductive portions 22.
- the shape and dimensions of the anisotropic conductive film arranging holes 11 of the frame plate 10 in the plane direction are the dimensions, pitches and pitches of the electrodes to be inspected of the wafer to be inspected. Designed according to the turn.
- the frame plate 10 As a material constituting the frame plate 10, the frame plate 10 is not easily deformed,
- the material is not particularly limited as long as it has an oka property enough to maintain the shape stably.
- various materials such as a metal material, a ceramic material, and a resin material can be used.
- an insulating coating may be formed on the surface of the frame plate 10.
- the metal material constituting the frame plate 10 include iron, copper, nickel, chromium, cobalt, magnesium, manganese, molybdenum, indium, lead, palladium, titanium, tungsten, aluminum, gold, platinum and silver.
- Examples include metals or alloys or alloy steels obtained by combining two or more of these metals.
- a fluorine resin film a polyimide resin film, a composite film containing a fluorine resin or a polyimide resin, a metal oxide film, or the like can be used.
- magnétique material constituting such a frame plate 10 include iron, nickel, cobalt, alloys of these magnetic metals, and alloys or alloy steels of these metals with other metals.
- the material constituting the frame plate 10 should have a coefficient of linear thermal expansion of 3 X 10 / K or less. It is preferable to use, more preferably one 1 X 1 0- 7 ⁇ 1 X 1 0 one 5 / K, particularly preferably 1 X 1 0- 6 ⁇ 8 X 1 0 one 6 / kappa.
- Invar-type alloys such as Invar-1
- Elinvar-type alloys such as Elinvar-1
- magnetic tt ⁇ alloys or alloy steels such as Super Invar, Kovar, and 42 alloys.
- the total thickness of the elastic anisotropic conductive film 20 (the thickness of the connecting conductive portion 22 in the illustrated example) is 50 to It is preferably 300 m, more preferably 70 m to 250 m, and particularly preferably 100 m to 200 m.
- the thickness is 50 ⁇ m or more, the elastic anisotropic conductive film 20 having sufficient strength can be reliably obtained.
- the thickness is 30000 im or less, the connecting conductive portion 2 having the required conductive characteristics can be obtained reliably.
- the protrusions 24 are formed on both surfaces of the elastic anisotropic conductive film 20, but may be formed on only one surface of the elastic anisotropic conductive film 20.
- the total height of the protrusions 24 is preferably at least 10%, more preferably at least 20%, of the thickness of the protrusions 24.
- the elastic high molecular substance forming the elastic anisotropic conductive film 20 a heat resistant high molecular substance having a crosslinked structure is preferable.
- Various materials can be used as the curable high molecular substance forming material that can be used to obtain such a crosslinked high molecular substance, but liquid silicone rubber is preferable.
- the liquid dog silicone rubber may be an addition type or a condensation type, but an addition type liquid dog silicone rubber is preferred.
- This addition-type liquid silicone rubber is cured by a reaction between a vinyl group and a Si—H bond, and is made of a polysiloxane containing both a vinyl group and a Si—H bond (one-component type).
- a two-component type (two-component type) consisting of a polysiloxane containing a bullet group and a polysiloxane containing a Si_H bond.
- the two-component addition type is used. It is preferable to use liquid silicone rubber.
- the obtained molding material has a high viscosity, which may make it difficult to form a molding material layer in a mold.
- the conductive particles do not move sufficiently, so that it may be difficult to orient the conductive particles so as to be aligned in the thickness direction.
- the compression set of the cured silicone rubber can be measured by a method in accordance with JIS 6249.
- the cured product of the silicone rubber forming the elastic anisotropic conductive film 0 preferably has a durometer A hardness at 23 ° C of 10 to 60, and more preferably 15 to 60. And particularly preferably those of 20 to 60.
- the durometer-A hardness is less than 10
- the insulating part 23 that insulates the connecting conductive parts 22 from each other is easily excessively deformed when pressed with calo, and the required distance between the connecting conductive parts is high. In some cases, it may be difficult to maintain the insulating properties of the steel.
- the silicone rubber cured product forming the elastic anisotropic conductive film 20 preferably has a tear strength at 23 ° C. of 8 kN / m or more, more preferably 10 kN / m. / m or more, more preferably 15 kN / m or more, particularly preferably 20 kN / m or more. If the tear strength is less than 8 kN / m, when excessive elastic strain is applied to the elastic anisotropic conductive film 20, the durability is reduced.
- liquid silicone rubber having such characteristics include liquid silicone rubber “KE200” series, “ ⁇ 1950” series, and “ ⁇ 1199” liquid silicone rubbers from Shin-Etsu Chemical Co., Ltd. You can use what is sold as “0” series.
- the curing catalyst of the first aspect can be used to stiffen the addition type liquid silicone rubber.
- Platinum-based ones can be used as such a hardcore hornworm medium, and specific examples thereof include chloroplatinic acid and salts thereof, a siloxane complex containing platinum monounsaturated group, and siloxane.
- Known complexes such as a complex with platinum, a complex of platinum with 3-dibutyltetramethyldisiloxane, a complex of triorganophosphine or phosphite and platinum, acetylacetate platinum chelate, and a complex of cyclic gen and platinum. No.
- the amount of the curing catalyst used is appropriately selected in consideration of the type of the curing catalyst and other curing treatment conditions, but is usually 3 to 15 parts by weight based on 100 parts by weight of the addition type liquid silicone rubber. .
- the addition type liquid 4 dog silicone rubber a base material having improved thixotropy, viscosity adjustment, dispersion stability of conductive particles, or high strength of the addition type liquid silicone rubber can be obtained.
- inorganic fillers such as ordinary silica powder, colloidal silica, airgel silica, and alumina can be contained.
- the use amount of such an inorganic filler is not particularly limited, but if it is used in a large amount, it is not preferable because the orientation of the conductive particles cannot be sufficiently achieved by the magnetic field.
- the conductive particles 522 for connection in the elastic anisotropic conductive film 20, and the conductive particles contained in # ⁇ 25 core particles exhibiting magnetic properties (hereinafter, also referred to as “magnetic core particles”).
- core particles exhibiting magnetic properties hereinafter, also referred to as “magnetic core particles”.
- One or more layers of a highly conductive coating layer are formed on the surface of the substrate.
- the term “highly conductive metal” refers to a material having a conductivity of 5 ⁇ 10 6 ⁇ —'m- 1 or more at 0 ° C.
- the number of magnetic core particles for obtaining the conductive particles P is as follows. It is preferable that the average particle size is 3 to 50 ⁇ m.
- the number average particle diameter of the magnetic single core particles refers to a value measured by a laser single diffraction scattering method.
- the conductive portion 22 for connection is easily obtained, which is easily deformed by calo-pressure, has a low resistance value, and has high connection reliability.
- the number average particle diameter is 50 ⁇ m or less, a fine conductive portion for connection 22 can be easily formed, and the obtained conductive portion for connection 2 has stable conductivity. Easy to have.
- the magnetic core particles preferably have a BET specific surface area of 10 to 150 Om 2 / kg, more preferably 20 to 100 Om 2 / kg, and particularly preferably 50 to 50 Om 2 / kg. Om 2 / kg. '
- the magnetic core particles have a sufficiently large area in which plating can be performed, so that a required amount of plating can be reliably performed on the magnetic core particles. Therefore, the conductive particles P having high conductivity can be obtained, and the contact area between the conductive particles P is sufficiently large, so that stable and high conductivity can be obtained.
- the BET specific surface area is 1500 m 2 / kg or less, the magnetic core particles are not fragile, are less likely to be broken when a physical stress is applied, and are stable. High conductivity is maintained.
- the magnetic core particles preferably have a particle diameter variation coefficient of 50% or less, more preferably 40% or less, still more preferably 30% or less, and particularly preferably 20% or less. It is.
- iron nickel, cobalt, or a material obtained by coating these metals on copper or resin can be used, and the saturation magnetization thereof is 0.1 Wb m 2 or more.
- the saturation magnetization thereof is 0.1 Wb m 2 or more.
- the conductive particles P can be easily moved in the molding material layer for forming the elastic anisotropic conductive film 20 by the method described later. Thereby, the conductive particles P can be reliably moved to a portion to be the conductive portion for connection in the material layer, and a chain of the conductive particles P can be formed.
- Such a coating layer may be composed of a single metal or may be composed of two or more metals.
- the Vickers hardness (Hv) is 40 or more, it may be made of an alloy of a metal having a Vickers hardness (Hv) of 40 or more and another metal such as gold. May have a phase separation structure in which the metal phase composed of the above metal is dispersed in another metal such as a metal phase composed of gold.
- the ratio of the mass of the coating layer is less than 15 mass 0/0, the anisotropic conductive connector-obtained when repeatedly used under a high temperature environment, the conductivity of the conductive particles P is markedly reduced It may be difficult to maintain the required conductivity.
- t is the thickness of the coating layer (m)
- Sw is the BET specific surface area of the core particles (m 2 / kg)
- m 2 / kg is the specific gravity of the metal constituting the coating layer (kg / m 3 )
- N is Mass / mass of the conductive particles.
- N is the ratio of the mass of the coating layer to the mass of the entire conductive particles.
- N m / (Mp + m) Equation (4)
- N / (1—N) m / Mp
- this coating layer is 4 O nm or more, when the anisotropic conductive connector is used repeatedly in a high temperature environment, the material constituting the magnetic core particles and the material constituting the electrode to be inspected are covered. Even when the conductive particles P migrate into the layer, the conductive particles P have a high ratio of highly conductive metal on the surface thereof. Conductivity is maintained.
- the conductive particles F preferably have a BET specific surface area of 10 to 150 Om 2 / kg. If the BET specific surface area is 1 O m 2 / kg or more, the surface area of the coating layer is sufficiently large, so that the coating layer having a large total weight of the highly conductive metal can be formed. Particles having high conductivity can be obtained, and the contact area between the conductive particles P is sufficiently large, so that stable and high conductivity can be obtained. On the other hand, if the BET specific surface area is less than 150 Om 2 / kg, the conductive particles do not become brittle, and are less likely to break when a physical stress is applied, and are stable and high. The conductivity is maintained.
- the number average particle diameter of the conductive particles P is preferably 3 to 50 m, and more preferably 6 to 15 m.
- the obtained elastic anisotropic conductive film 20 can be easily deformed by calo-pressure, and the connection conductive portion 22 in the elastic anisotropic conductive film 20 can be obtained. In this case, sufficient electrical contact between the conductive particles P is obtained.
- the shape of the conductive particles P is not particularly limited. However, since the conductive particles P can be easily dispersed in the polymer substance-forming material, they have a spherical shape, a star shape, or a form in which these are aggregated. It is preferable that it is a lump composed of secondary particles.
- the conductive particles P preferably have an electrical resistance R shown below of 0.3 ⁇ or less, more preferably 0.1 ⁇ or less.
- Electric resistance value R A paste composition is prepared by kneading 6 g of conductive particles and 8 g of liquid rubber, and this paste composition is opposed to each other at a distance of 0.5 mm. Are arranged between a pair of electrodes each having a diameter of l mm, and a magnetic field of 0.3 T is applied between the pair of electrodes. In this state, the electric resistance value between the pair of electrodes is stable. The electrical resistance value when left unattended.
- the sample chamber S of the cell 71 has a disk shape with a diameter d1 of 3 mm and a thickness d2 of 0.5 mm, and the penetration of the lid material 73 is performed.
- the inner diameter of the through hole 73H, that is, the diameter r of the electrode part 75 of the magnet 74 is 1 mm.
- the sample chamber S of the cell 71 is filled with the paste composition, and a parallel magnetic field of 0-3 T is applied between the electrode portions 75 of the magnets 74 in the thickness direction of the sample chamber S.
- the electric resistance between the electrodes 75 of the magnet 74 is measured by the electric resistance measuring device 76.
- the conductive particles dispersed in the paste composition are gathered between the electrode portions 75 of the magnets 74 by the action of the parallel magnetic field, and are further aligned in the thickness direction.
- the electric resistance between the electrode portions 75 of the magnet 74 decreases with the movement of the magnet 74, and then the state becomes stable, and the electric resistance at this time is measured.
- the time from when a parallel magnetic field is applied to the paste composition until the electric resistance value between the electrode portions 75 of the magnets 74 reaches a stable state depends on the type of the conductive particles, but usually the paste composition
- the electric resistance after a lapse of 500 seconds from the application of the parallel magnetic field is measured as electric resistance R.
- the conductive particles P may be those whose surfaces have been treated with a coupling agent such as a silane coupling agent.
- a coupling agent such as a silane coupling agent.
- the amount of the coupling agent used is appropriately selected within a range that does not affect the conductivity of the conductive particles F.
- the coating ratio of the coupling agent on the surface of the conductive particles P Is preferably 5% or more, more preferably 7 to 100%, more preferably 10 to 100%, and particularly preferably 10 to 100%. Is an amount to be 20 to 100%.
- Such conductive particles p can be obtained, for example, by the following method.
- a ferromagnetic material is formed into particles by a conventional method, or commercially available ferromagnetic particles are prepared, and the particles are subjected to a classification process to prepare magnetic core particles having a required particle diameter.
- the classification process of the particles can be performed by a classification device such as an air classification device and a sonic sieve device.
- the specific conditions of the classification process are appropriately set according to the number average particle diameter of the target magnetic core particles, the type of the classification device, and the like.
- the magnetic core particles are subjected to a surface oxide film removal treatment, and, for example, a surface cleaning treatment with pure water is performed to remove impurities, such as dirt, foreign matter, and oxide films, present on the surface of the magnetic core particles. Is removed. Then, if necessary, after performing an antioxidation treatment on the magnetic core particles, a coating layer made of a highly conductive metal is formed on the surface of the magnetic core particles, and a classification treatment is performed as necessary. Thus, conductive particles are obtained.
- a treatment method using an acid such as hydrochloric acid can be used as a specific method of removing the surface oxide film from the magnetic core particles.
- a treatment method using a water-soluble fullerene or the like can be used as a specific method of the treatment for preventing the magnetic core particles from being oxidized.
- the method for forming the coating layer is not particularly limited, and various methods can be used.
- a wet method such as a substitution plating method, a chemical reduction plating electroless plating method, an electric plating method, or a sputtering method.
- a dry method such as an evening method or a vapor deposition method can be used.
- an electroless plating method, an electric plating method, and a sputtering method can be suitably used.
- a slurry is prepared by adding acid-treated and washed magnetic core particles to a plating solution. Is prepared, and the magnetic core particles are subjected to electroless plating while stirring the slurry. Next, the particles in the slurry are separated from the plating liquid, and then the particles are washed with, for example, pure water to form a coating layer made of a highly conductive metal on the surfaces of the magnetic core particles. Conductive particles are obtained.
- an intermediate coating layer is formed on the surface of the magnetic core particles by, for example, an electroless plating method, and then, the surface of the intermediate coating layer is formed by an electric plating method. It is preferable to form a coating layer.
- the plating liquid used in the electroless plating method is not particularly limited, and various commercially available plating liquids can be used.
- the content ratio of the conductive particles P in the connection conductive portion 22 of the functional portion 21 is 10 to 60%, preferably 15 to 50% in volume fraction. If this ratio is less than 10%, the electrical resistance may be sufficiently low, and the connection conductive portion 22 may not be obtained. On the other hand, if this ratio exceeds 60%, the obtained conductive portion 22 for connection tends to be fragile, and the elasticity required for the conductive portion 22 for connection may not be obtained.
- the content ratio of the conductive particles P in the supported portion 25 varies depending on the content ratio of the conductive particles in the molding material for forming the elastic anisotropic conductive film 20. In order to reliably prevent an excessive amount of the conductive particles P from being contained in the outermost connecting conductive portion 22 of the connecting conductive portions 22 in the film 20, the molding is performed. It is preferable that the content ratio of the conductive particles in the material is equal to or more than that, and the volume fraction is 30% or less in that a supported part 25 having a sufficient bow daughter can be obtained. Is preferred.
- the above-described anisotropic conductive connector 1 can be manufactured, for example, as follows. First, a frame plate 10 made of a magnetic metal having anisotropic conductive film disposing holes 11 formed therein corresponding to the pattern of the electrode region where the electrodes to be inspected of the integrated circuit on the wafer to be inspected is formed. Is prepared. Here, as a method of forming the anisotropically conductive holes 11 of the frame plate 10, for example, an etching method can be used.
- a conductive paste composition is prepared by dispersing the above-described conductive particles in a polymer-forming material that is hardened to become an elastic polymer material. Then, as shown in Fig. 6, the elastic anisotropic conductive
- the molding material layer 2OA is formed by applying the first composition in accordance with a required pattern, that is, an arrangement pattern of the elastic anisotropic conductive film to be formed.
- the mold 60 is configured such that an upper mold 61 and a lower mold 65 that is a pair thereof are arranged to face each other.
- the conductive part 2 for connection of the anisotropic conductivity 20 In the upper die 61, as shown in an enlarged view in FIG. Arrangement of the conductive part 2 for connection of the anisotropic conductivity 20.
- the ferromagnetic layer 63 is formed according to the turn, and the non-magnetic layer 64 is formed in a part other than the ferromagnetic layer 63.
- a molding surface is formed by the ferromagnetic material layer 63 and the nonmagnetic material layer 64.
- the molding surface of ⁇ 61 corresponds to the protrusion 24 of the elastic anisotropic conductive film 20 to be molded. Thus, a recess 64a is formed.
- the substrates 62 and 66 in each of the upper die 61 and the lower die 65 are preferably made of a ferromagnetic material. Specific examples of such a ferromagnetic material include iron and iron-nickel alloy. , Iron-cobalt alloys, nickel, cobalt, etc.
- the substrates 62 and 66 preferably have a thickness of 0.1 to 50 mm, and have a smooth surface, are degreased in a dagger-like manner, and are mechanically polished. Preferably, there is.
- a nonmagnetic metal such as copper, a heat-resistant polymer substance, or the like may be used.
- a polymer substance cured by radiation can be preferably used.
- a photoresist such as an acryl-based dry film resist, an epoxy-based liquid resist, or a polyimide-based liquid resist can be used.
- a screen printing method As a method of applying a molding material to the molding surfaces of the upper mold 61 and the lower mold 65, it is preferable to use a screen printing method. According to such a method, the molding material can be easily applied according to a required pattern, and an appropriate amount of the molding material can be applied.
- the frame plate 10 is positioned and arranged via a spacer 69a on the molding surface of the lower mold 65 on which the molding material layer 2OA is formed.
- the upper mold 61 on which the molding material layer 2OA is formed is placed on the frame plate 10 via a spacer 69b, and the upper mold 61 is further positioned.
- the molding material layer 20 having the desired form (the form of the elastic anisotropic conductive film 0 to be formed) is placed between ⁇ 61 and the lower mold 65. A is formed.
- the conductive particles P are contained in a state of being dispersed throughout the molding material layer 20A.
- a pair of electromagnets are arranged on the upper surface of the substrate 62 in the upper die 61 and the T of the substrate 66 in the lower die 65 and actuated, whereby the upper die 61 and the lower die 65 are formed. Since the magnetic layers 6 3 and 67 are provided, the strength between the ferromagnetic layer 6 3 of the upper die 61 and the corresponding ferromagnetic layer 67 of the lower die 65 is larger than that of the surrounding region. A magnetic field having is formed. As a result, in the molding material layer 2OA, as shown in FIG.
- the conductive particles dispersed in the molding material layer 2OA become the ferromagnetic layer 63 of the upper mold 61 and the Of the lower mold 65 corresponding to the ferromagnetic layer 67 of the lower mold 65 and are aligned so as to be aligned in the thickness direction.
- the frame plate 10 is made of a magnetic metal, a larger magnetic field of the bow t3 ⁇ 4 is formed between each of the upper die 61 and the lower die 65 and the frame plate 10 as a result.
- the conductive particles P above and below the frame plate 10 in the molding material layer 2 OA gather between the ferromagnetic layer 63 of the upper mold 61 and the ferromagnetic layer 67 of the lower mold 65. Instead, it is held above and below the frame plate 10.
- the conductive particles P are contained in the elastic polymer substance formed integrally and continuously around the functional part 21, which is arranged in a state of being mutually separated by 23, and the functional part 21.
- the elastically anisotropic conductive film 0 comprising the supported portion 25 formed as described above is attached to the frame plate 10 in a state where the supported portion 25 is fixed to the periphery of the anisotropic conductive film disposing hole 11.
- an anisotropic conductive connector is manufactured.
- the intensity of the external magnetic field applied to the portion serving as the connection conductive portion 22 and the portion serving as the support 25 in the molding material layer 2OA has an average magnitude of 0.1 to 2.5 Tesla. preferable.
- the curing treatment of the molding material layer 2OA is selected depending on the material to be used, but is usually performed by processing.
- the magnetic stone may be provided with a heater.
- the specific calorie heat temperature and heating time are appropriately selected in consideration of the type of the polymer material forming material constituting the molding material layer 2OA, the time required for the movement of the conductive particles P, and the like.
- the conductive particles P contained in the conductive portion for connection 22 in the elastic anisotropically conductive film 20 include a coating layer having a Vickers hardness (Hv) of 40 or more. Therefore, for example, in the electrical inspection of an integrated circuit formed on a wafer, even when the conductive particles are repeatedly used many times, the conductive particles ⁇ The occurrence of peeling, abrasion, deformation, and the like in the coating layer is suppressed, and as a result, the required conductivity is maintained for a long time, and therefore, a high durability and a long service life are obtained.
- Hv Vickers hardness
- a conductive particle F made of gold and another highly conductive metal a conductive portion for connection having high conductivity can be obtained, and repeated many times at a high temperature ifTf. Even when used, the surface of the conductive particles is prevented from being deteriorated, and as a result, the required conductivity is maintained for a long period of time, and therefore, a high durability and a long service life are obtained.
- the conductive particles P the ratio of the mass of the coating layer 2 0 1 5 mass 0/0 or more with respect to the mass of the core particles, the thickness t of the coating layer of the high-conductive metal 4 O nm or more
- a supported portion 25 is formed on the periphery of the functional portion 21 having the conductive portion 22 for connection, and the supported portion 25 is formed on the frame plate 10. Since it is fixed to the periphery of the hole 11 for anisotropic conductive film placement, it is difficult to deform and easy to handle, and is used for electrical connection with the wafer to be inspected. Positioning and holding and fixing with respect to the wafer can be easily performed.
- each of the holes 11 for anisotropic conductive film placement of the frame plate 10 is formed corresponding to the electrode region where the electrode to be inspected of the integrated circuit in the wafer to be inspected is formed, Since the elastic anisotropic conductive film 20 disposed in each of the anisotropic conductive film arrangement holes 11 may have a small area, it is easy to form the individual elastic anisotropic conductive films 20.
- the elastic anisotropic conductive film 20 having a small area and a small area has a small absolute amount of thermal expansion in the surface direction of the elastic anisotropic conductive film 20 even when subjected to a thermal history.
- the frame plate 10 in forming the elastic anisotropic conductive film 20, for example, a magnetic field is applied to a portion to be the supported portion 25 in the molding material layer 2OA. Therefore, the curing process of the molding material layer 2OA can be performed in a state where the conductive particles P are still present in the portion, so that the portion to be the supported portion 25 in the molding material layer 2OA, that is, the frame plate 1
- the conductive particles present in the portions located above and below the peripheral portion of the anisotropic conductive film disposing hole 11 at 0 do not aggregate in the portion serving as the conductive layer for connection, and as a result, the elasticity obtained is obtained.
- the air flow holes 15 are formed in the frame plate 10, in a wafer inspection apparatus described later, a method using a decompression method as a means for pressing the probe member is used.
- FIG. 12 is an explanatory cross-sectional view schematically showing the configuration of an example of a wafer inspection apparatus using the anisotropic conductive connector according to the present invention.
- This wafer and inspection apparatus is for performing an electrical inspection of each integrated circuit formed on a wafer in a wafer state.
- the wafer inspection apparatus shown in FIG. 12 includes a probe member 1 for electrically connecting each of the electrodes 7 to be inspected on the wafer 6 to be inspected and the tester.
- a probe member 1 for electrically connecting each of the electrodes 7 to be inspected on the wafer 6 to be inspected and the tester.
- a plurality of inspection electrodes 31 are arranged on the surface (in the figure, according to the pattern corresponding to the pattern of the electrode 7 to be inspected on the wafer 6 to be inspected).
- the lower surface has an inspection circuit board 30 formed thereon.
- an anisotropic conductive connector 2 having the configuration shown in FIGS.
- connection conductive portions 22 in the conductive film 20 is provided so as to be in contact with each of the test electrodes 31 of the test circuit board 30, and is provided on the surface (the lower surface in the figure) of the anisotropic conductive connector 12.
- Each of the electrode structures 4 2 is elastically anisotropically conductive of the anisotropically conductive connector 2. It is provided so as to be in contact against the respective conductive parts for connection 2 2 in 2 0.
- a calo pressure plate 3 which presses the probe member 1 downward is provided on the back surface (the upper surface in the figure) of the inspection circuit board 30 of the probe member 1.
- a wafer mounting table 4 on which the target wafer 6 is mounted is provided, and a calo heater 5 is connected to each of the pressurizing plate 3 and the enclosing mounting table 4.
- substrate material constituting the circuit board 30 for inspection can be used as the substrate material constituting the circuit board 30 for inspection, and specific examples thereof include a glass fiber reinforced epoxy resin and a glass fiber reinforcing bow type resin.
- Composite resins such as enol resin, glass fiber reinforced polyimide resin, glass fiber backing key bismaleimide triazine resin, and ceramic materials such as glass, carbon dioxide, and alumina.
- a wafer inspection apparatus for performing a WL BI test or a probe test
- a substrate material include Pyrex (registered trademark) glass, quartz glass, alumina, beryllia, silicon carbide, aluminum nitride, and boron nitride.
- the sheet-like connector 140 in the probe member 1 will be specifically described.
- the sheet-like connector 140 has a flexible insulating sheet 41, and the insulating sheet 41 has The electrode structure 42 made of a plurality of metals extending in the thickness direction of the insulating sheet 41 according to the pattern corresponding to the pattern of the electrode 7 to be inspected on the wafer 6 to be inspected.
- the sheets 41 are spaced apart from each other in the plane direction.
- Each of the electrode structures 42 includes a protruding surface electrode portion 43 exposed on the surface (the lower surface in the figure) of the insulating sheet 41 and a plate-shaped back electrode portion exposed on the back surface of the insulating sheet 41. 4 and 4 are integrally connected to each other by a short-circuit portion 45 extending through in the thickness direction of the fibrous sheet 41.
- the thickness of the insulating sheet 41 is not particularly limited as long as the insulating sheet 41 is flexible, but is preferably from 10 to 50 m, and more preferably from 10 to 50 m. 5 m.
- Nickel, copper, gold, silver, palladium, iron, or the like can be used as a metal constituting the electrode structure 42.
- the electrode structure 42 is entirely made of a single metal. Also, it may be one made of an alloy of two or more metals or one made by laminating two or more metals.
- the surface of the front electrode portion 43 and the back electrode portion 44 of the electrode structure 42 has the It is preferable that a chemically stable metal having high conductivity, such as gold, silver, and palladium, be formed in that the oxidation of the electrode portion is prevented and an electrode portion having low contact resistance is obtained. Better.
- the protruding height of the surface electrode portion 43 in the electrode structure 42 is 15 to 50, um because a stable electrical connection to the electrode 7 to be inspected on the wafer 6 can be achieved. Is more preferable, and more preferably 15 to 30 Lim.
- the diameter of the surface electrode portion 43 is set according to the size and pitch of the electrode to be inspected on the wafer 6-for example, 30 to 80-and preferably 30 to 50. m.
- the diameter of the back surface electrode portion 44 in the electrode structure 42 may be larger than the short-circuit portion 45 and smaller than the arrangement pitch of the electrode structure 42, but is as large as possible. Therefore, stable electrical connection can be reliably achieved even with the connection conductive portion 22 in the elastic anisotropic conductive film 20 of the anisotropic conductive connector 11. Further, the thickness of the back electrode portion 44 is preferably from 20 to 50, more preferably from 30 to 40 um, from the viewpoint that the strength is sufficiently high and excellent repeated durability is obtained. .
- the sheet-like connector 40 can be manufactured, for example, as follows.
- a laminated material in which a metal layer is laminated J1 on the insulating sheet 41 is prepared, and the insulating sheet 41 of this material is subjected to laser processing, dry etching processing, or the like, to thereby form the insulating sheet 41.
- the laminated material is subjected to laser processing, dry etching processing, or the like, to thereby form the insulating sheet 41.
- a short-circuit portion 45 integrally connected to the metal layer is formed in the through hole of the insulating sheet 41, and the insulating On the surface of the sheet 41, a protruding surface electrode portion 43 integrally connected to the short-circuit portion 45 is formed.
- a photo-etching process is performed on the metal layer of the product Jf material to remove the photo-etching, thereby forming a back electrode portion 44 to form an electrode structure 42, thereby forming a sheet-like connector 140. Is obtained.
- a wafer 6 to be inspected is placed on an ⁇ mounting table 4, and then the probe member 1 is pressed downward by a force [J pressure plate 3].
- a force [J pressure plate 3] By doing so
- Each of the surface electrode portions 43 of the electrode structure 42 of the sheet-like connector 40 of the present embodiment comes into contact with each of the electrodes 7 to be inspected of the wafer 6, and further, by the respective surface electrode portions 43, the wafer 6
- Each of the electrodes 7 to be inspected is pressurized. In this state, the elasticity of the anisotropic conductive connector 2 and the connection conductive property in the anisotropic conductive film 20!
- Each of 52 2 is compressed by the inspection electrode 31 of the inspection circuit board 30 and the surface electrode portion 43 of the electrode structure 42 of the sheet-like connector 140 and compressed in the thickness direction. As a result, a conductive path is formed in the connection conductive portion 22 in the thickness direction, and as a result, the electrical connection between the electrode 7 to be inspected on the wafer 6 and the inspection electrode 31 on the circuit board 30 for inspection is performed. Is achieved. Thereafter, the wafer 6 is heated to a predetermined temperature by the caro heater 5 via the wafer mounting table 4 and the pressure plate 3, and in this state, a required electrical inspection is performed on each of the plurality of integrated circuits on the wafer 6. Be executed.
- the wafer inspection apparatus since the probe member 1 having the anisotropic conductive connector 2 having high durability and long service life is provided, the wafer is inspected many times. Frequent search for replacing the conductive connector 2 with a new one can be reduced, thereby enabling high-efficiency wafer inspection and reduction of inspection cost.
- the elastic anisotropic conductive film 20 in the anisotropic conductive connector 12 has a small area of its own, and even when subjected to a thermal history, the heat in the surface direction of the elastic anisotropic conductive film 20 is not affected. Since the absolute amount of expansion is small, by using a material having a small linear thermal expansion coefficient as a material for forming the frame plate 10, the thermal expansion in the plane direction of the elastic anisotropic conductive film 20 depends on the frame plate. It is surely regulated. Therefore, even when a WLBI test is performed on a large-area wafer, a favorable electrical connection state can be stably maintained.
- FIG. 14 is an explanatory sectional view schematically showing the configuration of another example of the wafer inspection apparatus using the anisotropic conductive connector according to the present invention.
- This wafer inspection apparatus has a box-shaped chamber 150 having an open upper surface for accommodating a wafer 6 to be inspected.
- An exhaust pipe 51 for exhausting air inside the chamber 50 is provided on a side wall of the chamber 50.
- the exhaust pipe 51 has, for example, a vacuum port.
- An exhaust device (not shown) such as a pump is connected.
- a probe member 1 having the same configuration as the probe member 1 in the wafer inspection apparatus shown in FIG. 12 is disposed on the chamber 150 so as to hermetically close the opening of the chamber 150. More specifically, an elastic 0-ring 55 is disposed in close contact with the upper end surface of the side wall of the chamber 150, and the probe member 1 includes an anisotropic conductive connector 2 and a sheet-like core.
- Nectar 40 is housed in chamber 50, and the periphery of circuit board 30 for inspection is arranged in close contact with 0—ring 55, and circuit board 30 for inspection is further provided. Is pressed downward by a calo pressure plate 3 provided on the back surface (the upper surface in the figure).
- the wafer 6 is heated to a predetermined temperature by the caro heater 5 through the chamber 50 and the pressurizing plate 3, and in this state, a required electric power is supplied to each of the plurality of integrated circuits on the wafer 6. An inspection is performed.
- the same effects as those of the wafer inspection apparatus shown in FIG. 12 can be obtained, and a large-sized pressurizing mechanism is not required.
- the entire wafer 6 can be pressed with a uniform force.
- the air flow holes 15 are formed in the frame plate 10 of the anisotropically conductive connector 2, when the pressure in the chamber 150 is reduced, the anisotropically conductive connector 2 and the inspection circuit board are reduced.
- the elastic anisotropic conductive film 20 is not connected to the electrode to be inspected on the wafer in addition to the connecting conductive portion 22. A part may be formed.
- an anisotropic conductive connector having an elastic anisotropic conductive film on which a non-connection conductive portion is formed will be described.
- FIG. 15 is an enlarged plan view showing an elastic anisotropic conductive film in another example of the anisotropic conductive connector according to the present invention.
- the functional portion 21 has a thickness direction electrically connected to an electrode to be inspected of a wafer to be inspected (see FIG.
- connection conductive portions 22 extending in a direction perpendicular to the plane of the drawing) are arranged in two rows in accordance with the pattern corresponding to the pattern of the electrode to be inspected.
- Each of them is densely contained in a state in which conductive particles exhibiting magnetism are aligned so as to be arranged in the thickness direction, and are insulated from each other by an insulating portion 23 containing no or almost no conductive particles.
- the electrode to be inspected of the wafer to be inspected is electrically connected.
- An unconnected conductive portion 26 extending in the thickness direction is formed.
- the non-connection conductive portion 26 is densely contained in a state in which conductive particles exhibiting magnetism are aligned so as to be arranged in the thickness direction, and the insulating portion 23 containing no or almost no conductive particles is used. It is mutually threaded with the conductive part 22 for connection.
- a portion where the connecting conductive portion 2 and its peripheral portion are located, and a non-connecting conductive portion 26 and its peripheral portion are provided.
- a protrusion 24 and a protrusion 27 protruding from other surfaces are formed.
- the periphery of the functional portion 21 is fixed to the periphery of the hole 11 for disposing the anisotropic conductive film in the frame plate 10.
- a supported portion 25 that is constantly supported is formed integrally and continuously with the functional portion 21, and the supported portion 25 contains conductive particles.
- Each of these conductive portions for connection 22 is made of conductive particles exhibiting magnetism. Are densely contained in a state oriented in the thickness direction, and are insulated from each other by the insulating portion 23 containing no or almost no conductive particles.
- the two connection conductive portions 22 adjacent to each other are located at a separation distance larger than the separation distance between the other connection conductive portions 22 adjacent to each other.
- a non-conducting conductive layer 6 extending in the thickness direction that is not electrically connected to the electrode to be inspected of the wafer to be inspected is formed between the two adjacent conductive sections 22 adjacent to each other at the center. Have been.
- the non-connection conductive portion 26 is densely contained in a state in which conductive particles exhibiting magnetism are aligned so as to be arranged in the thickness direction, and is formed by an insulating portion 23 containing no or almost no conductive particles. , And are insulated from each other by the connecting conductive part 22.
- a supported part 25 fixedly supported at the periphery of the hole 11 for anisotropic conductive film placement in the frame plate 10 is continuously connected to the functional part 21.
- the supported portion 25 contains conductive particles.
- the ferromagnetic layer is formed in accordance with the pattern corresponding to the arrangement pattern of the connecting conductive portions 22 and the non-connecting conductive portions 26 of the elastic anisotropic conductive material 20 to be molded instead of the mold shown in FIG.
- the anisotropic conductive connector shown in FIGS. 1 to 4 described above is used by using a mold including an upper mold and a lower mold on which a nonmagnetic layer is formed in a portion other than the ferromagnetic layer. It can be manufactured in the same manner as the manufacturing method.
- a pair of electromagnets are arranged on the upper surface of the substrate in the upper mold and the lower surface of the substrate in the lower mold and actuated, so that the upper mold and the lower mold are operated.
- the conductive particles dispersed in the part serving as the functional part 21 in the molding material layer become the conductive part 22 for the connection and the conductive part 26 for the non-connection.
- the conductive particles above and below the frame plate 10 in the molding material layer are held above and below the frame plate 10. Will remain.
- connection conductive portions 22 and the non-connection portions in which the conductive particles are contained in the elastic polymer material in a state aligned in the thickness direction are formed.
- a functional part 21 in which the conductive part 26 for use is arranged in a state in which the conductive part 26 is insulated from each other by an insulating part 23 made of a polymer elastic material having no or almost no conductive particles;
- An elastic anisotropic conductive film 20 composed of a supported diced structure 25 formed of an elastic polymer substance containing conductive particles and formed continuously and integrally around the periphery thereof is anisotropically formed on the frame plate 10.
- the supported portion 25 is fixed around the conductive film disposing hole 11 so that the anisotropic conductive connector is manufactured.
- the non-connection conductive portion 26 in the anisotropic conductive connector shown in FIG. 15 applies a magnetic field to a portion of the molding material layer which becomes the non-connection conductive portion 26.
- the conductive particles existing between the outermost portion of the molding material layer serving as the connection conductive portion 22 and the frame plate 10 are converted to the portion serving as the non-connection conductive portion 26. In this state, it is obtained by performing a curing treatment of the molding material layer. Therefore, in the formation of the elastic anisotropic conductive film 20, the conductive particles are not excessively aggregated at the outermost portion of the molding material layer which is to be the connection conductive portion 22.
- the elastic anisotropic conductive film 20 to be formed has a relatively large number of connecting conductive portions 22, the outermost connecting conductive portion in the elastic anisotropic conductive film 20. 22 contains an excessive amount of conductive particles. It is reliably prevented from being possessed.
- the non-connection conductive portion 26 in the anisotropic conductive connector shown in FIG. 16 forms a magnetic field in a portion of the molding material layer which becomes the non-connection conductive portion 26 in forming the elastic anisotropic conductive film 20.
- the conductive particles between the adjacent one of the connecting conductive portions 2 arranged at a large separation distance in the molding material layer are turned into the non-connecting conductive portions 26 in the molding material layer. It is obtained by subjecting the molding material layer to a hardening treatment in this state. Therefore, in the formation of the elastic anisotropic conductive film 20, the conductive particles are applied to the two adjacent conductive portions 22 of the molding material layer which are arranged at a large separation distance. There is no aggregation. Therefore, even if the elastic anisotropic conductive film 20 to be formed has two or more connection conductive portions 22 arranged at a large separation distance, the connection conductive portions 22 An excessive amount of conductive particles is reliably prevented from being contained.
- the protruding portion 24 of the elastic anisotropic conductive film 20 is not indispensable, and one surface or a square has a flat surface or a recess. You may.
- a metal layer or a DLC (diamond-like carbon) layer may be formed on the surface of the connecting conductive portion 22 in the elastic anisotropic conductive film 20.
- anisotropic conductive connector of the present invention is not limited to inspection of wafers, but may be a connector used for inspection of electronic components such as semiconductor chips and packaged integrated circuit devices. It is also useful as a connector used for mounting electronic components.
- a magnetic field is applied to a portion to be the supported portion 25 in the molding material layer 2 OA.
- a method for applying the magnetic field means for applying a magnetic field by plating a magnetic material or applying a magnetic material around the hole 11 for anisotropic conductive film placement in the frame plate 10, a mold 60.
- means for forming a ferromagnetic layer corresponding to the supported portion 25 of the elastic anisotropic conductive film 20 and applying a magnetic field can be used.
- the sheet-like connector 40 is not essential, As shown in FIG. 17, for example, the electrode 7 to be inspected on the wafer 6 to be inspected is a hemispherical protruding electrode that is soldered: ⁇ ⁇ , the probe member 1 is an anisotropic conductive connector.
- the elastic anisotropic conductive film 20 in the above may be configured to contact the wafer 6 to achieve electrical connection.
- the integrated circuit formed on the wafer having a diameter of 8 inches or 12 inches with a high concentration is used.
- the number of test electrodes and the number of wirings on the test circuit board to be used can be reduced as compared with the method of performing the inspection on all integrated circuits at once.
- the manufacturing cost of the inspection device can be reduced.
- the anisotropic conductive connector of the present invention or the probe member of the present invention has high durability in repeated use, an electrical test is performed on the integrated circuit formed on the wafer for each divided area.
- the frequency of replacing the connector with a new one due to the failure of the anisotropic conductive connector is reduced, so that the inspection cost can be reduced.
- the physical properties of the addition-type liquid silicone rubber and the physical properties of the coating layer on the conductive particles were measured as follows.
- the viscosity at 23 ⁇ 2 ° C. was measured with a B-type viscometer.
- Solution A and Solution B in addition type liquid silicone rubber are mixed with equal proportions. did.
- the mixture is poured into a mold, and the mixture is subjected to a defoaming treatment under reduced pressure, and then a curing treatment is performed at 120 ° C. for 30 minutes to have a thickness of 12.7 mm.
- a cylinder of 29 mm cured silicone rubber Made a cylinder of 29 mm cured silicone rubber, and
- the Bichards hardness of the coating layer of conductive particles is determined by forming a coating layer on a flat Nigger plate with a thickness of 1 mm by the same method (coating or sputtering) as the coating layer of conductive particles.
- the Vickers hardness of this coating layer was measured in accordance with JISZ2244.
- the thickness of the coating layer to be formed is set according to JISZ 2244, but it is difficult to form a coating layer with a large thickness when forming the coating layer by sputtering. Therefore, it was set within the range of 0.5 to 1 m.
- Magnetic core particles [A] were prepared as follows using commercially available nickel particles (FC100, manufactured by Westam Co., Ltd.).
- the obtained magnetic core particles [A] have a number average particle diameter of 8.5 m, a coefficient of variation of the particle diameter of 31%, a BET specific surface area of 0.45 x 10 3 m 2 / kg, and a saturation magnetization of 0.4. Atsuta in 6 Wb / m 2
- the slurry was allowed to stand while being cooled, and the particles were allowed to settle, and the supernatant was removed to prepare intermediate particles having an intermediate coating layer made of gold formed on the surface of the magnetic core particles.
- 2 L of pure water was added to the treatment tank, and the mixture was stirred at room temperature for 1 minute, allowed to stand for 1 minute to allow particles to separate, and the supernatant was removed. By repeating this operation twice more, the surface of the intermediate particles was washed.
- Pulverized conductive particles are put into the uppermost sieve (opening diameter: 20 ii), classified at 125 Hz for 15 minutes, and the lowermost sieve (opening diameter: 1 The conductive particles collected at 0 ⁇ m) were collected. By performing such an operation twice, a classification process of the conductive particles was performed. The classified conductive particles are referred to as “conductive particles [A 1]”. Conductive t producing particles [A 1] The number-average particle diameter of 8. 8 ⁇ m, BET specific surface area is 0.
- the ratio is 2 7 mass of the intermediate coating layer to magnetic core particles [a] 0/0, the ratio of the surface coating layer is 9 wt. /. (The total ratio of the coating layers was 36% by mass), and the electric resistance value R was 0.05 ⁇ . Further, the bitter hardness (Hv) of the intermediate coating layer was 2 (the Picker hardness (Hv) of the surface coating layer was 200).
- the magnetic core particles [A] were subjected to a surface oxide film removal treatment, a surface cleaning treatment, and an oxidation prevention treatment in the same manner as in Preparation Example 1 of the conductive particles, and then subjected to 150 ° C by a vacuum dryer. the drying process was conducted under conditions of 1 X 1 0- 3 P a, 1 0 hours.
- the magnetic core particles [A] were charged into a processing tank of a powder sputtering apparatus (manufactured by Nissin Steel Co., Ltd.), and a target made of gold was set.
- the intermediate particles were taken out of the treatment tank, and the intermediate particles were poured into ethanol, stirred, allowed to stand for 2 minutes, and then the supernatant was removed. By repeating this operation two more times, the intermediate particles were washed. Thereafter, the intermediate particles were dried in an oven at 80 ° C.
- the intermediate particles were charged into a processing tank of a powder sputtering apparatus (manufactured by Nissin Steel Co., Ltd.), and an evening get made of rhodium was set. Thereafter, while the intermediate particles were stirred, air and ambient pressure in the treatment tank is evacuated to a 1 X 1 0- 3 P a, ambient pressure argon gas to those physical tank is LXL 0- 'P introduced to be a. Then, in this state, the intermediate particles are subjected to a spatula treatment to form a surface coating layer made of rhodium, whereby the conductive particles are prepared.
- the conductive particles were cooled, they were taken out of the treatment tank, the conductive particles were put into ethanol, stirred, allowed to stand for 2 minutes, and then the supernatant was removed. By repeating this operation twice more, the conductive particles were washed. Thereafter, the conductive particles were dried in an oven at 80 ° C. Then, the conductive particles were classified in the same manner as in Preparation Example 1 of the conductive particles.
- the conductive particles are referred to as “conductive particles [A 2]”.
- the obtained conductive particles [A2] have a number average particle diameter of 8.9 ⁇ m and a BET specific surface area of 0.3.
- Conductive particles were obtained in the same manner as in Preparation Example 2 of the conductive particles, except that a target made of silver was used in place of the gate made of gold in Preparation Example 2 of the conductive particles.
- the conductive particles are referred to as “conductive particles [A3]”.
- the obtained conductive particles [A3] have a number average particle size of 9. l ⁇ m, a BET specific surface area of 0.35 ⁇ 10 3 m 2 / kg, an intermediate coating layer thickness of 37 nm, and a surface coating layer. Is 20 nm (total thickness of the coating layer is 57 nm), the ratio of the intermediate coating layer to the magnetic core particles [A] is 15% by mass, and the ratio of the surface coating layer is 10% by mass (total of the coating layer). Was 25 mass./), and the electrical resistance value R was 0.08 ⁇ .
- the Vickers hardness (Hv) of the intermediate coating layer was 24, and the Pickers hardness (Hv) of the surface coating layer was 800.
- Conductive particles were obtained in the same manner as in Preparation Example 2 of conductive particles except that the scanning of the treatment was performed once. This conductive particle is referred to as “conductive particle [A4]”.
- the obtained conductive particles [A4] have a number average particle diameter of 8.8, a specific surface area of 0.38 ⁇ 10 3 m 2 / kg, and a surface coating layer thickness of 40 nm (total of coating layers).
- thickness 40 nm) of the proportion is 25 mass 0/0 of the total percentage of the surface coating layer to magnetic core particles [a] is 25 mass 0/0 (coating layer), the electric resistance value R 0 ⁇ 08Omu met was.
- the Vickers hardness ( ⁇ ) of the skin layer was 58.
- the conductive particles are referred to as “conductive particles [A5]”.
- the magnetic core particles [B] were used instead of the magnetic core particles [A], and the processing conditions for the electroless plating of gold were changed.
- the processing conditions were changed, and in the classification of conductive particles, sieves with openings of 50 ⁇ m and 32 ⁇ m were used instead of sieves with openings of 20 ⁇ m, 16 m and 10 m.
- conductive particles were prepared in the same manner except that the conductive particles collected on a sieve having an opening diameter of 32 m were collected. This conductive particle is referred to as “conductive particle [B 1]”.
- Conductive particles were prepared in the same manner as in Preparation Example 6 of conductive particles, except that the processing conditions for the electroless gold plating were changed and that the gold-cobalt alloy plating was not performed.
- the conductive particles are referred to as “conductive particles [B 2]”.
- the obtained conductive particles [B 2] have a number average particle diameter of 32 ⁇ BET specific surface area of 0.14 ⁇ 10 3 m 2 / kg and a surface coating layer thickness of 48 nm (total of coating layers). a thickness of 48 nm), the ratio is 1 5 mass 0/0 of the total percentage of the surface coating layer to magnetic core particles [B] 1 5 mass 0/0 (coating layer), the electric resistance value R is 0. 03Omu Met.
- the Vickers hardness (Hv) of the surface coating layer was 20.
- Table 1 The characteristics of the conductive particles [A 1] to the conductive particles [A 5] and the conductive particles [B 1] [B 2] are summarized in Table 1 below.
- Test wafer Wl [Production of test wafer]
- the diameter 8 of silicon Inchi (linear thermal expansion coefficient of 3. 3 X 1 0 6 / K ) manufactured on the wafer 6 -, dimensions respectively 6. 5 mm X 6. 5 mm A total of 596 square integrated circuits L were formed.
- Each of the integrated circuits L formed on the wafer 6 has an electrode area A to be inspected at the center thereof as shown in FIG. 19, and the electrode area A to be inspected has a diameter as shown in FIG.
- 26 electrodes to be inspected 7 consisting of hemispherical solder with a height of 80 ⁇ m and a height of 60 m are arranged in two rows in a horizontal direction at a pitch of 120 m (the number of electrodes 7 to be inspected in one row is 13) It is arranged in.
- the separation distance between the electrodes 7 to be inspected adjacent in the vertical direction is 450 m.
- two of the 26 electrodes 7 to be inspected are electrically connected to each other.
- the total number of the electrodes 7 to be inspected on the entire wafer 6 is 15496.
- this wafer is referred to as “test wafer Wl”.
- test wafer W2J 596 integrated circuits of the same configuration as the test wafer W1 except that the electrodes to be inspected were made of rectangular flat gold with dimensions of 70 mm x 220 mm (3.3 ⁇ ⁇ ⁇ 10-6 / K). This wafer is called “test wafer W2J”.
- Each of the integrated circuits formed on the wafer has 78 electrodes to be inspected consisting of hemispherical solder with a diameter of 450 m and a height of 350 m, which are arranged vertically and horizontally at a pitch of 800 im (6 in the vertical direction). And (13) laterally arranged electrode regions to be inspected. Also, two out of the 78 electrodes under test 7 are electrically connected to each other.
- this wafer W3 this wafer is referred to as “test wafer W3”.
- the diameter of the 596 anisotropic conductive Ilffi mounting hole formed corresponding to each electrode area to be inspected on the test wafer W1 is 8 inches.
- the thickness thereof is 60 ⁇ M.
- Each of the holes 11 for anisotropic conductive film placement has a horizontal dimension (the horizontal direction in FIGS. 21 and 22) of 1800 / m and a vertical dimension (the vertical direction in FIGS. 21 and 22). ) Is 600, um.
- a circular air inflow hole 15 is formed at a central position between vertically adjacent anisotropically conductive HE mounting holes 11 and has a diameter of 100,000 / jm.
- the material of these spacers is stainless steel (SUS 304) and its thickness is 20 m.
- the through hole corresponding to each of the electrodes to be inspected has a horizontal dimension of 2500 m and a vertical dimension of 1400 m.
- a mold for forming an elastic anisotropic conductive film was produced under the following conditions.
- the upper mold 61 and the lower mold 65 in this mold each have substrates 62 and 66 made of iron having a thickness of 6 mm. On the substrates 62 and 66, the surfaces of the test wafer W1 are covered. According to the pattern corresponding to the pattern of the inspection electrode, a ferromagnetic layer 6 3 (67) for forming a conductive part for connection and a ferromagnetic layer 6 3 a for forming a conductive part for non-connection made of Nigel (67a) is located.
- each dimension of the ferromagnetic layer 6 3 (67) for forming the connection conductive portion is 6 Oum (horizontal direction) X 200 / m (vertical direction) X 100 m (thickness), Twenty-six ferromagnetic layers 6 3 (67) are arranged horizontally in two rows at a pitch of 1 2 O wm (the number of ferromagnetic layers 63 (67) in a row is 13 and they are vertically adjacent The distance between the ferromagnetic layers 63 (67) is arranged at 450 ⁇ im).
- each ferromagnetic layer 63a (67a) is 80 m (horizontal direction) X 300 urn (vertical direction) X 100 m (thickness).
- the non-magnetic layer 64 (68) is formed by curing the dry film resist, and the non-magnetic layer 64 (68) in which the ferromagnetic layer 63 (67) for forming the conductive portion for connection is located.
- the dimensions of 64a (68a) are 70 ⁇ m (horizontal direction) x 210m (longitudinal direction) x 30 ⁇ m (depth), and ferromagnetic for forming conductive part for non-connection.
- Each dimension of the recess 64b (68b) where the body layer 6 3a (67a) is located is 90m (horizontal) x 260um (vertical) x 25m (depth)
- the thickness of the portion other than the recess is 75 um (the thickness of the recess is 50 u).
- anisotropically conductive connector C1 this anisotropically conductive raw connector is referred to as "anisotropically conductive connector C1".
- Each of the elastic anisotropic conductive films has a horizontal dimension of 250 ⁇ 100 m and a vertical dimension of 140 ⁇ m.
- the functional parts in each of the elastic anisotropic conductive films are composed of 16 connecting conductive parts in a horizontal direction with a pitch of 120 ⁇ m (two rows of connecting conductive parts.
- the distance between the vertically adjacent connecting conductive parts is 45 Om)
- each of the connecting conductive parts has a horizontal dimension of 60 w mu and a vertical dimension of 2 0 0, the thickness is 160, and the thickness of the insulating part in the functional part is 100.
- a non-connection conductive portion is arranged between the connection conductive portion located outermost in the lateral direction and the frame plate.
- Each of the non-connection conductive portions has a horizontal dimension of 80 m, a vertical dimension of 300 m, and a thickness of 100 1m.
- the thickness of the supported portion (one thickness of the forked portion) in each of the elastic anisotropic conductive films is 20 ⁇ m.
- the volume fraction of all the connection conductive parts was about 30%.
- anisotropic conductive connector C 2 An anisotropic conductive connector was manufactured in the same manner as in Example 1, except that the conductive particles [A 2] were used instead of the conductive particles [A 1].
- anisotropic conductive connector C 2 this anisotropic conductive connector is referred to as “anisotropic conductive connector C 2”.
- the content ratio of the conductive particles in the conductive portion for connection in each of the elastic anisotropic conductive films of the resulting anisotropic conductive connector C-1 was examined. 30%.
- anisotropic conductive connector 1 was manufactured in the same manner as in Example 1, except that the conductive particles [A 3] were used instead of the conductive particles [A 1].
- anisotropic conductive connector C3 this anisotropic conductive connector is referred to as "anisotropic conductive connector C3".
- the volume fraction of all the conductive portions for connection was about 30%. % Met.
- anisotropically conductive connector 1 was manufactured in the same manner as in Example 1 except that the conductive particles [A 4] were used instead of the conductive particles [A 1].
- anisotropically conductive connector-C4 this anisotropically conductive connector is referred to as “anisotropically conductive connector-C4”.
- the volume fraction of all the connection conductive portions was about 30%.
- a frame plate having 32 anisotropic conductive film arrangement holes formed corresponding to each test electrode region on the test wafer W3 was manufactured under the following conditions under the following conditions.
- the frame plate 10 is made of 4, 2 alloy (saturated magnetization 1.45 Wb / m 2, linear thermal expansion coefficient 5 X 10-6 / K), and has vertical and horizontal dimensions of 133.5. It is a giant plate of mmx54.8 mm and has a thickness of 150, / jm.
- the frame plate 10 has a horizontal dimension (left and right in FIG. 24) of 11.2 mm and a vertical dimension corresponding to a part of the integrated circuit pattern on the test wafer W3.
- the three anisotropic conductive film placement holes 11 with dimensions of 5.6 mm are formed vertically and horizontally (four in the vertical direction and eight in the horizontal direction). I have.
- a total of 10 positioning holes 16 are formed in the outer peripheral edge portion of the frame plate 10, and the diameter of each of them is 3. Omm.
- the through hole corresponding to each electrode area to be inspected has a horizontal dimension of 104.1 mm and a vertical dimension of 26.4 mm.
- the upper mold 61 and the lower mold 65 in this mold are each made of iron having a thickness of 6 mm, and have a plurality of recesses 6 2a corresponding to some integrated circuits in the test wafer W3 on the surface.
- 66a are formed on the substrate 62, 66, and the recesses of the substrates 62, 66 have recesses for the electrodes to be inspected in a part of the integrated circuit of the test wafer W3.
- a plurality of ferromagnetic layers 63 a and 67 a for forming a non-connection conductive portion are formed so as to surround the magnetic layers 63 and 67.
- the substrates 62, 66 and the ferromagnetic layers 63, 63a, 67, 67a are formed by etching the substrate material.
- the layers 63, 63a, 67, 67a are formed continuously and integrally with the substrates 62, 66, and the material thereof is iron.
- the ferromagnetic layers 6 3 and 6 7 corresponding to the electrodes to be inspected in one integrated circuit of the test wafer W 3 will be described.
- the dimensions of the ferromagnetic layers 6 3 and 6 7 Is 350 urn (diameter) x 150 m (thickness).
- 78 Eight ferromagnetic layers 63,67 are arranged in six rows (the number of ferromagnetic layers 63,67 in one row is 13) at a pitch of 800 ⁇ . I have.
- the body layers 63a and 67a are arranged at a pitch of 800 ⁇ tm.
- Non-magnetic material layer 6 4 c 68 c is provided, recesses on the surface of substrates 62, 66 other than 62 a, 66 a, first non-magnetic f biological layer 64 c, 6 8 c
- the second nonmagnetic layer 64 d formed by hardening the dry film resist is formed on the surface of the ferromagnetic layer 63 a and the surface of the ferromagnetic layer 63 a for forming the non-connection conductive part.
- each dimension of the recess 64 a in the upper mold 61 is 380 m (diameter) x 3 um (depth), and each dimension of the 68 a in the lower mold 65 is 380 m (diameter) x 100 ⁇ . m (depth)
- an elastic anisotropic conductive film was formed on the frame plate as follows.
- the addition-type liquid silicone rubber is a two-pack type having a viscosity of liquid A of 25 OPa ⁇ s and a viscosity of liquid B of 250 Pa ⁇ s.
- the conductive paste composition prepared as a molding material for the elastic anisotropic conductive film is applied to the surfaces of the upper and lower molds of the above-mentioned mold by screen printing, whereby the elastic anisotropic conductive material to be formed is formed.
- a molding material layer is formed in accordance with the pattern of the film, and a frame plate is aligned on the molding surface of the lower mold via a spacer on the lower mold side, and further stacked on the frame plate. ⁇ The ⁇ was aligned and overlapped through the sample.
- anisotropically conductive connector C5 this anisotropically conductive connector is referred to as “anisotropically conductive connector C5”.
- the obtained elastic anisotropic conductive film has a horizontal dimension of 104.i mm and a vertical dimension of 26.4 mm.
- 78 connection conductive parts are arranged in a horizontal direction at a pitch of 800 m in six rows (the number of connection conductive parts in one row is 13).
- Each of the connecting conductive portions has a diameter of 380 m, a thickness of 340, and an insulating portion in the functional portion of 210 m.
- a non-connection conductive portion is disposed between the connection conductive portion and the frame plate.
- the dimensions of each of the non-connection conductive parts are a diameter of 350m and a thickness of 210.
- the thickness of the supported portion (one thickness of the forked portion) in each of the elastic anisotropic conductive films is 30 m.
- the volume fraction of all the conductive portions for connection was about 3%. 7 at 0%.
- anisotropic conductive connector C 6 An anisotropic conductive connector was manufactured in the same manner as in Example 1, except that the conductive particles [A 5] were used instead of the conductive particles [A 1].
- anisotropic conductive connector C 6 this anisotropic conductive connector is referred to as “anisotropic conductive connector C 6”.
- anisotropically conductive connector was manufactured in the same manner as in Example 5, except that the conductive particles [B2] were used instead of the conductive particles [B1].
- this anisotropically conductive connector is referred to as “anisotropically conductive raw connector C 7 J”.
- the volume fraction of all the conductive portions for connection was about 30%. %.
- Alumina ceramics (linear thermal expansion coefficient of 4 ⁇ 8 x 1 0 - 6 / K) as a substrate material using a test electrode is made form in accordance with a pattern corresponding to the path evening one emission electrodes to be inspected in the test wafer W 1 Inspection circuit boards were produced.
- This test circuit board is a rectangle measuring 30 cm x 30 cm in overall dimensions, and its test electrodes have a horizontal dimension of 60 and a vertical dimension of 200 um. Is gold plated.
- this inspection circuit board is referred to as “inspection circuit board Tl”.
- »as anti materials have use alumina ceramics (linear thermal expansion coefficient of 4. 8 X 1 0 one 6 / kappa), to be inspected of the integrated circuits 3 two of the test wafer W 3 (8 to four chi)
- An inspection circuit board having inspection electrodes formed according to a pattern corresponding to the electrode pattern was manufactured.
- the inspection circuit board has a rectangular shape with an overall dimension of 14 O mm X 6 O mm, and each of the inspection electrodes has a circular shape with a diameter of 450 mm, and its surface is plated with gold. Have been.
- this inspection circuit board is referred to as “inspection circuit board T 2”.
- test wafer W 1 Place the test wafer W 1 on a test table equipped with an electric heater, and place it on the test wafer W 1. 2004/003931
- anisotropically conductive connectors are aligned with each other so that each of the conductive portions for connection is positioned on the electrode to be inspected of the test wafer W1, and on this anisotropically conductive connector,
- the inspection circuit board T is aligned and arranged so that each of the inspection electrodes is positioned on the connection conductive part of the anisotropic conductive connector 1, and the inspection circuit board T is placed downward. Pressing was performed for 1 minute with a load of kg (the load applied to one conductive part for connection was about 10 g on average). Then, at room temperature (25 ° C.), 154,96 test electrodes on the test circuit board T are electrically connected to each other via the anisotropic conductive connector 1 and the test wafer W1.
- the electrical resistance between the two test electrodes was measured sequentially, and the measured electrical resistance was subtracted from the previously measured electrical resistance of the test wafer W 1 circuit.
- This operation is referred to as “conduction resistance”) of the connecting conductive part in the anisotropic conductive connector.
- This operation is referred to as “operation (i)”.
- the pressurization of the circuit board T for inspection was released, and the circuit board T was left for 15 seconds in this non-pressurized state.
- This operation is referred to as “operation (ii)”.
- the operation (i) and the operation (i i) were repeatedly performed as one cycle, and the number of cycles until the value of the conduction resistance measured in the operation (i) exceeded 1 ⁇ was obtained.
- connection conductive part having a conduction resistance of 1 ⁇ or more in an electrical inspection of an integrated circuit formed on a wafer.
- the test wafer W3 is placed on a test table equipped with an electric heater, and 32 (4 x 8) integrated circuits adjacent to the integrated circuits formed on the test wafer W3 are formed.
- Anisotropically conductive connector is positioned and positioned on the area thus selected, such that each of the conductive portions for connection is positioned on the test object of the test wafer W3.
- the test circuit board T2 is aligned and arranged so that each of the test electrodes is positioned on the connection conductive part of the anisotropic conductive connector 1, and the test circuit board T2 is further lowered. It was moved to pressurize the anisotropic conductive connector, and the minimum displacement position at which the connecting conductive part of the anisotropic conductive connector was conducted was found.
- operation (i) the inspection circuit board T2 was displaced further 60 m below the minimum displacement position, and held in this state for 1 minute. Then, the test table was heated to 85 ° C. to measure the conduction resistance of the conductive part for connection in the anisotropic conductive connector. This operation is referred to as “operation (i)”. Next, the pressure applied to the inspection circuit board T2 was released, and the apparatus was left for 15 seconds in the non-pressurized state. This operation is referred to as “operation (ii) J. Then, operation (i) and operation (ii) are repeated as one cycle, and the value of the conduction resistance measured in operation (i) is 1 ⁇ . The number of cycles up to that point was determined.
- Test 3 was continued by replacing the test wafer W 3 with a new one.
- connection conductive part having a conduction resistance of 1 ⁇ or more in an electrical inspection of an integrated circuit formed on a wafer.
- the test wafer W2 is placed on a test table provided in a constant temperature bath, and an anisotropic conductive connector C1 is placed on the test wafer W2 so that each of the connection conductive portions is connected to the test wafer.
- W2 is positioned so as to be located on the electrode to be inspected, and on this anisotropic conductive connector, a circuit board T for inspection is placed so that each of the inspection electrodes is connected to the anisotropic conductive connector C1. Align the circuit board so that it is located on the conductive part for connection, and further place the test circuit board T1 downward with a load of 150 kg (the load applied to one conductive part for connection is about 10 g).
- operation (i) the temperature in the thermostatic chamber is raised to 15 ° C, and the pressure is maintained for 4 hours under a temperature condition of 125 ° C. After that, the conduction resistance of the connecting conductive portion of the anisotropic conductive connector 1 is reduced. Was measured. This operation is referred to as “operation (i)”. Next, after the temperature was lowered to room temperature (30.C or less), the pressurization of the test circuit board T1 was released, and the test circuit board T1 was left for 15 minutes without pressurization. This operation is referred to as “operation (ii) J. Then, the operation (i) and the operation (ii) are repeated as one cycle, and until the value of the conduction resistance measured in the operation (i) exceeds 1 ⁇ . In the above, if the conduction resistance of the connecting conductive part of the anisotropic conductive connector is 1 ⁇ or more, this is actually used in the electrical inspection of the integrated circuit formed on the wafer. It is difficult to do. Table 5 shows the results.
- the electrode to be inspected is either a protruding one or a flat one. However, it was confirmed that good conductivity was maintained for a long time.
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Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US10/548,832 US7311531B2 (en) | 2003-03-26 | 2004-03-23 | Anisotropic conductive connector, conductive paste composition, probe member, wafer inspection device and wafer inspection method |
EP04722670A EP1608040A4 (en) | 2003-03-26 | 2004-03-23 | ANISOTROPER CONDUCTIVE CONNECTOR, CONDUCTIVE PASTE COMPOSITION, SONDER, WAFER INSPECTION DEVICE AND WAFER SEARCH METHOD |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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JP2003085092 | 2003-03-26 | ||
JP2003-085092 | 2003-03-26 |
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WO2004086565A1 true WO2004086565A1 (ja) | 2004-10-07 |
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PCT/JP2004/003931 WO2004086565A1 (ja) | 2003-03-26 | 2004-03-23 | 異方導電性コネクターおよび導電性ペースト組成物、プローブ部材並びにウエハ検査装置およびウエハ検査方法 |
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US (1) | US7311531B2 (ja) |
EP (1) | EP1608040A4 (ja) |
KR (1) | KR100756120B1 (ja) |
CN (1) | CN1765032A (ja) |
TW (1) | TW200503138A (ja) |
WO (1) | WO2004086565A1 (ja) |
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JP2023131868A (ja) * | 2022-03-10 | 2023-09-22 | 株式会社東芝 | 半導体モジュールアレイ装置 |
KR20230151389A (ko) * | 2022-04-25 | 2023-11-01 | 주식회사 아이에스시 | 도전성 입자의 제조방법, 도전성 입자 및 전기접속용 커넥터 |
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JP4240724B2 (ja) | 2000-01-26 | 2009-03-18 | Jsr株式会社 | 異方導電性シートおよびコネクター |
EP1315241A4 (en) | 2000-08-09 | 2008-03-19 | Jsr Corp | ANISOTROPIC CONDUCTIVE FILM |
ATE284083T1 (de) * | 2000-09-25 | 2004-12-15 | Jsr Corp | Anisotropisches leitfähiges verbindungsblatt, herstellungsverfahren dafür und produkt davon |
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US7131851B2 (en) | 2002-08-09 | 2006-11-07 | Jsr Corporation | Anisotropic conductivity connector, conductive paste composition, probe member, and wafer inspection device, and wafer inspecting method |
AU2003254855A1 (en) * | 2002-08-09 | 2004-02-25 | Jsr Corporation | Anisotropic conductivity connector, probe member, wafer inspecting device, and wafer inspecting method |
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- 2004-03-23 WO PCT/JP2004/003931 patent/WO2004086565A1/ja not_active Application Discontinuation
- 2004-03-23 KR KR1020057017777A patent/KR100756120B1/ko active IP Right Grant
- 2004-03-23 EP EP04722670A patent/EP1608040A4/en not_active Withdrawn
- 2004-03-23 US US10/548,832 patent/US7311531B2/en not_active Expired - Lifetime
- 2004-03-23 CN CNA2004800081268A patent/CN1765032A/zh active Pending
- 2004-03-24 TW TW093108010A patent/TW200503138A/zh unknown
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JP2002170608A (ja) * | 2000-09-25 | 2002-06-14 | Jsr Corp | 異方導電性シートおよびその製造方法並びにその応用製品 |
JP2002157918A (ja) * | 2000-11-17 | 2002-05-31 | Jsr Corp | 導電性複合粒子およびそれを用いた応用製品 |
JP2003077559A (ja) * | 2001-08-31 | 2003-03-14 | Jsr Corp | 異方導電性コネクターおよびその製造方法並びにその応用製品 |
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Cited By (5)
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US7245138B2 (en) | 2005-01-05 | 2007-07-17 | Samsung Electronics Co., Ltd. | POGO pin and test socket including the same |
US20210359434A1 (en) * | 2018-10-11 | 2021-11-18 | Sekisui Polymatech Co., Ltd. | Electrical connection sheet and terminal-equipped glass plate structure |
US20210288446A1 (en) * | 2018-10-26 | 2021-09-16 | Jae Suk Oh | Signal transmission connector and method for manufacturing same |
US11456562B2 (en) * | 2018-10-26 | 2022-09-27 | Jae Suk Oh | Signal transmission connector and method for manufacturing same |
TWI674927B (zh) * | 2018-11-30 | 2019-10-21 | 聚昌科技股份有限公司 | 消除擾流之液氣分離式塗佈機結構 |
Also Published As
Publication number | Publication date |
---|---|
US20060211280A1 (en) | 2006-09-21 |
US7311531B2 (en) | 2007-12-25 |
EP1608040A4 (en) | 2007-11-14 |
TW200503138A (en) | 2005-01-16 |
KR100756120B1 (ko) | 2007-09-05 |
EP1608040A1 (en) | 2005-12-21 |
KR20050123113A (ko) | 2005-12-29 |
CN1765032A (zh) | 2006-04-26 |
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