WO2012073783A1 - Surface treatment agent for pd or alloy mainly composed of pd, and surface coating layer structure of copper surface - Google Patents
Surface treatment agent for pd or alloy mainly composed of pd, and surface coating layer structure of copper surface Download PDFInfo
- Publication number
- WO2012073783A1 WO2012073783A1 PCT/JP2011/077039 JP2011077039W WO2012073783A1 WO 2012073783 A1 WO2012073783 A1 WO 2012073783A1 JP 2011077039 W JP2011077039 W JP 2011077039W WO 2012073783 A1 WO2012073783 A1 WO 2012073783A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- film
- treatment agent
- surface treatment
- main component
- alloy
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/20—Preliminary treatment of work or areas to be soldered, e.g. in respect of a galvanic coating
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/362—Selection of compositions of fluxes
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1635—Composition of the substrate
- C23C18/1637—Composition of the substrate metallic substrate
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1646—Characteristics of the product obtained
- C23C18/165—Multilayered product
- C23C18/1651—Two or more layers only obtained by electroless plating
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C18/00—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating
- C23C18/16—Chemical coating by decomposition of either liquid compounds or solutions of the coating forming compounds, without leaving reaction products of surface material in the coating; Contact plating by reduction or substitution, e.g. electroless plating
- C23C18/1601—Process or apparatus
- C23C18/1633—Process of electroless plating
- C23C18/1689—After-treatment
- C23C18/1692—Heat-treatment
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F11/00—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent
- C23F11/08—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids
- C23F11/10—Inhibiting corrosion of metallic material by applying inhibitors to the surface in danger of corrosion or adding them to the corrosive agent in other liquids using organic inhibitors
- C23F11/167—Phosphorus-containing compounds
- C23F11/1676—Phosphonic acids
Definitions
- the present invention relates to a surface treating agent that suppresses oxidation of Pd or an alloy surface mainly containing Pd in an electronic component or substrate having an alloy surface mainly containing Pd or Pd. Furthermore, it is related with the surface film layer structure of the copper surface processed with this surface treating agent. Furthermore, the present invention relates to an electronic component and a substrate manufactured by performing the surface treatment, and an apparatus using the electronic component and the substrate.
- Soldering is a technology that joins objects using a material having a relatively low melting point, and is widely used for joining and assembling electronic devices in modern industries.
- the commonly used solder is Sn—Pb alloy, and its eutectic composition (63% Sn—remainder Pb) has a melting point as low as 183 ° C. Therefore, the soldering is performed at 220 to 230 ° C. As a result, almost no thermal damage is caused to the electronic components and the substrate.
- the Sn—Pb alloy has excellent characteristics that it has good solderability and is solidified immediately during soldering, and hardly cracks or peels even if vibration is applied to the soldered portion. .
- electronic devices are formed of a synthetic resin such as an outer frame or a substrate and a metal such as a conductor or a frame. When discarded, the electronic device is not incinerated and mostly buried in the ground. In recent years, rain on the ground tends to be acidic (acid rain), and it has become a problem that the solder of electronic devices buried in the ground is eluted to contaminate groundwater. For this reason, particularly in the electronic equipment industry, an alternative movement to lead-free solder (lead-free solder) is rapidly progressing.
- solder 90% Sn-remainder Pb
- Candidates for lead-free solder plating are roughly classified into pure Sn, Sn—Ag (Cu), Sn—Zn, and Sn—Bi.
- plating on the surfaces of electronic parts such as substrates and lead frames to be joined with solder is generally performed by electrolytic Ni—Au, electrolytic Sn, electroless Sn, electroless Ag, electroless Ni—Au, Electrolytic Ni-Pd-Au and OSP (Organic Solderbility Preservatives, organic solderability protective agents, also known as heat resistant preflux) are widely used.
- electrolytic Ni—Au and electroless Ni—Pd—Au treatment is performed on a substrate having contacts such as independent pads in addition to the solder joint surface.
- gold is a very stable metal and does not oxidize.
- Ni and Pd films are less oxidizable than copper, but are more easily oxidized than gold. Therefore, the purpose of Au plating on the solder joint surface and the final surface of the contact is to suppress oxidation of Ni and Pd and to maintain excellent solderability and contact performance. Viewed from the opposite side, soldering surfaces and contacts that have undergone electroless Ni-Au plating or electroless Ni-Pd-Au plating use expensive Au on the final surface, which increases the cost of plating. There are drawbacks.
- the surface treatment agent that suppresses oxidation As the surface treatment agent that suppresses oxidation, the surface treatment agent comprising the acidic phosphate ester and salt thereof of Patent Document 1 by the present inventors, or the antioxidant comprising the phosphoric acid diphenyl ester proposed in Patent Document 2 and the like.
- the ester bonds are decomposed by heat treatment at a relatively high temperature (200 ° C or higher), so the oxidation of solder joints and electrical contacts in the lead-free solder reflow process The prevention cannot be solved.
- the already known OSP treatment is excellent in both heat resistance and solderability, and can be said to be an excellent technique if it is limited only to the solder joint surface.
- the contact is organic processing, so it is vulnerable to mechanical wear and peels off immediately, exposing the underlying copper and oxidizing the copper. There is a problem that the resistance value is lowered due to the progress of the process.
- the contact point is desired to be stable against mechanical wear, with little decrease in film due to wear.
- a surface treatment agent a total of 0.01 g / L or more of one or more of compounds having at least two phosphonic acid groups in one molecule and no ester bond in the molecule and / or a salt thereof.
- the surface treatment agent to be contained is described in Patent Document 4. Especially for Sn and Sn alloys, it has the effect of imparting oxidation resistance, improving solder wettability and suppressing the occurrence of whiskers, but when the surface treatment agent is used for copper wiring parts, There is no description regarding the solder joint and electrical contact oxidation control and contact stability in the reflow process. Therefore, a surface treating agent that combines Pd oxidation inhibition, excellent solderability and contact stability by applying an inexpensive organic film on Pd without using gold has not yet been found.
- the present invention provides a surface treatment agent that suppresses the oxidation of the surface of metal, particularly Pd or an alloy containing the same as a main component, and improves the solderability such as solder wettability and solderability, and the characteristics as a contact.
- Another object of the present invention is to provide a surface treatment agent for obtaining a connector terminal that is resistant to mechanical wear and is stable with little reduction in coating due to wear.
- the present inventors formed an alloy film mainly composed of Ni—Pd or Pd on the copper surface, and stretched a specific organic film on the surface of the alloy mainly composed of Pd or Pd.
- the inventors have found that it is possible to prevent oxidation of the alloy surface as a main component and to minimize deterioration of solder wettability, and the present invention has been achieved.
- the organic film found by the present inventors is selected from the group consisting of a compound having two or more phosphonic acid groups in one molecule and no ester bond in the molecule and / or a salt thereof, and phosphoric acid. It is an organic film formed by surface treatment with a surface treatment agent containing a total of 0.01 g / L or more of seeds or two or more.
- solder wettability can be improved, providing oxidation resistance to the surface of Pd or an alloy containing Pd as a main component. Also, the solderability is good, and the contact having the surface treated Pd or the alloy part mainly composed of Pd has a remarkable improvement effect in maintaining the characteristics as the contact. That is, the present invention is as follows.
- a surface treatment agent for Pd or an alloy containing Pd as a main component characterized by comprising a solution dissolved in a solvent in an amount of 0.01 g / L or more.
- X 1 to X 3 and Y 1 to Y 3 may be the same or different and each represents a hydrogen atom or a lower alkyl group having 1 to 5 carbon atoms.
- R 1 , R 2 and R 4 may be the same or different and each represents the following group (A)
- R 3 represents the following group (A) or a group having 1 to 5 represents a lower alkyl group
- n represents an integer of 1 to 3.
- X 1 and Y 1 are the same as defined in the general formula (I).
- X represents a hydrogen atom or a lower alkyl group having 1 to 5 carbon atoms
- Y represents a hydrogen atom, a lower alkyl group having 1 to 5 carbon atoms, a hydroxyl group, or an amino group.
- a Ni film and then a Pd film or an alloy film containing Pd as a main component is formed on the copper surface, and further, Pd or Pd according to any one of the above (1) to (5) is formed on the surface.
- a surface film layer structure on a copper surface wherein an organic film is formed using a surface treatment agent of an alloy containing as a main component.
- the surface film layer structure on the copper surface according to (6), wherein the Ni film and / or the Pd film or the alloy film containing Pd as a main component is a film formed by electroless plating. .
- the organic film formed by the surface treatment agent is formed by either immersing in the surface treatment agent or applying or spraying the surface treatment agent, (6) or (7) The surface film layer structure of the copper surface as described in 2.
- the surface of the alloy containing Pd or Pd as a main component is imparted with oxidation resistance and solder wettability is improved. Can do. Therefore, the surface of the copper provided in the electronic circuit or substrate is covered with a Ni film, then with a Pd film or an alloy film containing Pd as a main component, and further, the surface is mainly composed of Pd or Pd with the surface treatment agent of the present invention.
- the oxidation resistance of the surface of the alloy mainly composed of Pd or Pd can be imparted and solder wettability can be improved without using expensive Au. It also has excellent solderability.
- the electronic component manufactured in the process including the surface treatment using the surface treatment agent of the present invention has a remarkably improved contact stability. Further, when the surface treatment agent of the present invention is applied to a connector terminal, it is resistant to mechanical wear like a contact, and is stable with little decrease in film due to wear. Moreover, the cost is low. Further, as in the case of copper wiring, it is possible to solve the deterioration of solder wettability and the increase in contact resistance after heat treatment.
- the surface treatment agent for Pd or an alloy containing Pd as a main component of the present invention comprises a compound having two or more phosphonic acid groups in one molecule and no ester bond in the molecule and / or a salt thereof, and phosphoric acid. It is a surface treatment agent containing 0.01 g / L or more in total of one or more selected from the group consisting of, and can improve the oxidation resistance of the surface of the treatment agent.
- the content of one or more of a compound having two or more phosphonic acid groups in one molecule and no ester bond in the molecule and / or a salt thereof, and phosphoric acid is less than 0.01 g / L. And its effect is small. On the other hand, there is no upper limit of the addition amount because the property does not deteriorate even if the addition amount is too large. However, the addition amount is preferably 0.01 to 500 g / L, more preferably from the viewpoint of cost. 0.1 to 100 g / L.
- the surface treatment agent of the present invention uses a compound that does not contain an ester bond in the molecule, the ester bond is not decomposed by heat treatment, and sufficient oxidation resistance is obtained even when heat-treated at a relatively high temperature. Therefore, good solderability at the time of soldering can be imparted.
- a compound having two or more phosphonic acid groups in one molecule has a more detailed mechanism than a compound having one phosphonic acid group in one molecule, but is superior in oxidation resistance. found.
- the number of phosphonic acid groups in one molecule is preferably 2 to 6 in view of cost.
- Examples of the compound having two or more phosphonic acid groups in one molecule and not containing an ester bond in the molecule and / or a salt thereof are represented by the following general formulas (I), (II), and (III). Examples thereof include compounds and / or salts thereof with alkali metal salts, ammonium salts, and amine compounds.
- X 1 to X 3 and Y 1 to Y 3 may be the same or different and each represents a hydrogen atom or a lower alkyl group having 1 to 5 carbon atoms.
- R 1 , R 2 and R 4 may be the same or different and each represents the following group (A), and R 3 represents the following group (A) or a group having 1 to 5 represents a lower alkyl group, and n represents an integer of 1 to 3.
- X 1 and Y 1 are the same as defined in the general formula (I).
- X represents a hydrogen atom or a lower alkyl group having 1 to 5 carbon atoms
- Y represents a hydrogen atom, a lower alkyl group having 1 to 5 carbon atoms, a hydroxyl group, or an amino group.
- nitrilotrismethylenephosphonic acid and the like are particularly preferable because they are industrially available.
- compound represented by the general formula (II) ethylenediaminetetrakismethylenephosphonic acid, diethylenetriaminepentakismethylenephosphonic acid and the like are particularly preferable.
- compound represented by the general formula (III) 1- Hydroxyethane-1,1-diphosphonic acid and the like are particularly preferable.
- alkali metal salt of the above compound sodium salt, potassium salt and the like are preferable, and as the salt with amine compound, triethylamine salt, triethanolamine salt and the like are preferable.
- the surface treating agent of this invention contains a halogen or halide salt further.
- the amount of the halogen or halide salt is preferably 0.01 g / L or more. If the amount is less than 0.01 g / L, the effect is small. Conversely, if the amount added is too large, the antioxidant property is deteriorated, and the cost is not preferable.
- / L is desirable, more desirably 0.1 to 100 g / L.
- halogen or halide salt examples include halogen, alkali metal salt or ammonium salt of hydrogen halide, iodine, alkali metal salt or ammonium salt of hydrogen iodide, bromine, alkali metal salt or ammonium salt of hydrogen bromide.
- iodine alkali metal salt or ammonium salt of hydrogen iodide
- bromine alkali metal salt or ammonium salt of hydrogen bromide.
- potassium iodide, sodium iodide, ammonium iodide, bromide kalim, sodium bromide, and ammonium bromide are more preferable.
- the surface treatment agent of the present invention can be used by dissolving a compound having two or more phosphonic acid groups in one molecule and no ester bond in the molecule and / or a salt thereof, or phosphoric acid in a solvent.
- the solvent used is not particularly limited as long as it is soluble.
- water and polar solvents such as alcohol and glycol can be mentioned, but water is preferable in consideration of solubility, cost and the like.
- the pH is set to 9 or less, but it has been found that the oxidation resistance of the surface to be treated is further improved by adjusting the pH to 5 or less.
- the pH of the surface treatment agent is more preferably pH 0 to 3 in consideration of the influence on the material and the like.
- the pH adjuster generally available acids and alkalis can be used.
- the oxidation resistance of the surface to be treated is further improved. Even if the addition amount of the surfactant is less than 0.01 g / L or more than 10 g / L, the effect of oxidation resistance cannot be obtained.
- the addition amount of the surfactant is preferably 0.1 to 10 g / L.
- the surfactant one or more commercially available anionic, cationic, nonionic, and amphoteric surfactants can be appropriately selected and used.
- Anionic surfactants include sulfate ester type, sulfonate salt type, phosphate ester salt type, sulfosuccinate type, and cationic surfactants include quaternary ammonium salt type and amine salt type.
- Nonionic surfactants include higher alcohol ethylene oxide adducts, higher alcohol propylene oxide adducts, alkylphenol ethylene oxide adducts, polyoxyethylene polyoxypropylene block polymers, ethylenediamine polyoxyethylene polyoxypropylene block polymers, Aliphatic amine ethylene oxide adducts, aliphatic amide ethylene oxide adducts and the like, and amphoteric surfactants are preferably amino acid type, betaine type and the like.
- anionic and nonionic types When using the pH in the range of 5 or less, it is preferable to use one or more anionic and nonionic types as appropriate.
- polyethylene glycol type is particularly preferable for nonionic surfactants, and higher alcohol ethylene oxide adducts, higher alcohol propylene oxide adducts, alkylphenol ethylene oxide adducts, polyoxyethylene polyoxypropylene block polymers, and the like are particularly preferably used.
- the anionic surfactant is particularly preferably a sulfate ester salt type or a phosphate ester salt type.
- the surface treatment agent of the present invention may contain an amount of an additive in a range that does not impair the original properties for the purpose of imparting desired performance.
- the additive include preservatives and pH buffering agents, and conventionally known additives can be used.
- the surface treating agent of the present invention can improve the oxidation resistance of the surface of Pd or an alloy containing Pd as a main component.
- the Pd or an alloy containing Pd as a main component is not particularly limited, but is particularly suitable for the treatment of wiring portions, contacts, and connector terminals having a specific copper surface.
- the surface coating layer structure on the copper surface of the present invention will be described in detail below.
- the surface coating layer structure on the copper surface of the present invention is formed by forming a Ni film, a Pd film or an alloy film containing Pd as a main component on the copper surface of the electronic component or substrate, and further treating with a surface treatment agent of the present invention. An organic film is formed.
- the Ni film may be an alloy film containing Ni as a main component.
- the alloy containing Ni as a main component include Ni-P and Ni-B.
- the phosphorus content is preferably 2 to 13% by weight, more preferably 5 to 12% by weight.
- Ni-B is used for the electronic component.
- the boron content is preferably 1 to 5% by weight, and more preferably 2 to 4% by weight.
- the metal processed with the surface treating agent of this invention is Pd or an alloy which has it as a main component.
- Pd—P, Pd—Ni, Pd—Co, Pd—Au, Pd—Ag, Pd—In, and the like are listed as alloys containing Pd as a main component.
- the phosphorus content is 1 It is preferably ⁇ 10% by weight, and more preferably 2 to 6% by weight.
- another kind of metal film may be added between the Ni film and the Pd film or an alloy film containing Pd as a main component.
- an alloy containing Ni as a main component and an alloy containing Pd as a main component mean an alloy containing Ni and Pd in the alloy by 50% by weight or more.
- the Ni film and / or the Pd film or the alloy film containing Pd as a main component is preferably formed by electroless plating instead of electrolytic plating in order to apply plating to a complex circuit with a uniform thickness.
- electroless plating variations in the plating film occur due to the fact that a complicated circuit connection must be considered in order to pass a current and the potential difference due to the resistance of the circuit.
- the electroless plating solution to be used a known plating solution can be used.
- the Ni film prevents copper diffusion.
- the thickness of the Ni film is preferably 0.5 ⁇ m or more. Although there is no particular upper limit, it is preferably 15 ⁇ m or less in consideration of forming the Ni film by electroless plating.
- the thickness of the Ni film is preferably 0.5 to 15 ⁇ m, and more preferably 2 to 8 ⁇ m.
- the thickness of the Pd film or the alloy film containing Pd as a main component is preferably 0.005 to 0.5 ⁇ m, and more preferably 0.01 to 0.1 ⁇ m.
- the thinner the Pd film or the alloy film containing Pd as a main component the better.
- the thick portion does not affect the characteristics and is not limited. However, there is a problem of cost, and 0.5 ⁇ m or less is preferable.
- the thickness of the organic film formed with the surface treating agent of the present invention is preferably 0.1 nm to 10 nm. If the thickness is less than 0.1 nm, the effect is small, and if it exceeds 10 nm, the solder wettability is deteriorated.
- any method may be used as long as it is a method of forming a film on the surface of the metal.
- the metal is simply immersed in the surface treatment agent.
- examples thereof include a method, a method of spraying a surface treatment agent in a shower or the like, or a method of applying using an apparatus such as an air coater, blade coater, rod coater, knife coater, gravure coater, reverse coater, cast coater.
- the shape of the workpiece to be surface-treated with the surface treatment agent of the present invention may be any shape such as a linear shape, a plate / strip / foil shape, and a granular shape, and the surface may be any shape.
- Any alloy may be used as long as it is Pd or an alloy containing Pd as a main component.
- the surface treatment agent of the present invention is particularly effective when treating the surface of Pd or an alloy mainly composed of Pd formed on an electronic component, a substrate, etc., but is resistant to oxidation, solderability, and contact stability. As long as it aims to have both, it can be applied to any mode.
- the surface treatment of the present invention by treating the surface of the electronic component or the conductor surface of the connection terminal portion of the substrate, particularly the surface on which the Ni film, further the Pd film or the alloy film mainly composed of Pd is formed on the copper surface, An electronic component or substrate having excellent oxidation resistance and improved solder wettability can be obtained. Moreover, it can be set as the electronic component or board
- the electroless Au plating film has a Vickers hardness of 70 Hv, Pd—P has a Vickers hardness of around 400 Hv, and pure Pd has a Vickers hardness of 300 Hv. Therefore, the electronic component and the substrate of the present invention are harder than the Au film and wear resistant. Excellent contact properties and contact characteristics.
- the electronic component and the substrate can be suitably used for devices such as a liquid crystal display and a mobile phone.
- the surface coating layer according to the present invention in which an Ni film, further a Pd film or an alloy film containing Pd as a main component is formed on the copper surface, and is further processed with the surface treatment agent of the present invention to form an organic film.
- the structure of the connector terminal is also effective because it is resistant to mechanical wear as well as the contact point, and is stable with little decrease in coating due to wear. Further, when the connector terminal is continuously used for a long period of time, there is a possibility that a part of the organic film on the treated surface may be peeled off. In such a case, Pd film or Pd is mainly used on the outermost surface.
- the Ni film, the Pd film, and the alloy film containing Pd as a main component may be formed by electroplating, and an electric Ni plating solution, an electric Pd plating solution, or an alloy containing electric Pd as a main component.
- a known plating solution can be used as the plating solution.
- Examples 1 to 9 Nine types of aqueous solutions containing two or more phosphonic acid groups in one molecule and having no ester bond in the molecule or a salt thereof were prepared (Examples 1 to 9). The breakdown is shown in Table 1.
- a FR-4 base material with a thickness of 0.8 mm was used as a test substrate, and two types of copper lands, a 4 mm square land (used for solder spreading) and a 0.4 mm ⁇ land (pulled, used for shear evaluation) were prepared. . Both are over resist types. The following treatment was performed on this base material.
- the copper wiring on the substrate is Ni-treated by electroless plating and then Pd-treated by the above process, and further immersed in the treatment agent shown in Examples 1 to 9 at a bath temperature of 40 ° C. for 30 seconds, followed by washing with water.
- the dried substrate was used as a test substrate.
- the Ni film formed by the electroless Ni plating and the Pd film thickness formed by the electroless Pd plating were measured with a fluorescent X-ray film thickness meter (manufactured by Seiko Instruments), and the thickness of the organic film formed by the treatment agent. As a result of measuring the thickness with a depth profile of Auger spectroscopy, the Ni film thickness was 5 ⁇ m, the Pd film thickness was 0.1 ⁇ m, and the thickness of the organic film was 1 nm.
- Table 1 shows the test results. Evaluation of solder spread 30% rosin flux is applied to the 4mm square pad on the 4mm square copper land formed above, solder ball (Eco Solderball M705 0.4mm ⁇ ) is mounted, and reflow device (RF-330: Nippon Pulse) Manufactured), the solder was melted under the following heat history conditions, and the solder spread (before reflow) was measured.
- the heat history is as follows. Preheat: 165 ° C Reflow temperature: 215 ° C (peak temperature 256 ° C) Movement speed in reflow furnace: 17cm / min It took 8 minutes from the introduction of the furnace to the removal.
- a test substrate that had been reflowed four times under the above-described thermal history conditions was prepared, and solder balls were mounted in the same manner to evaluate solder spread (after reflow).
- Comparative Examples 1 to 3 and Reference Examples 1 to 2 As described in Table 1, the surface treatment was prepared in Example 1 except that the organic treatment with the surface treatment agent other than the surface treatment agent of the present invention, the organic treatment not performed, the electroless Ni—Au, and the OSP treatment were used. Test bases were produced and evaluated in the same process. That is, a base material treated with a treating agent having a phosphonic acid component concentration lower than the lower limit (Comparative Example 1), a base material treated with a treating agent other than the present invention (Comparative Example 2), an electroless Ni—Pd After plating, only the substrate was washed and dried, and the substrate (Comparative Example 3) from which the surface treatment was omitted was evaluated.
- a base material treated with a treating agent having a phosphonic acid component concentration lower than the lower limit Comparative Example 1
- a base material treated with a treating agent other than the present invention Comparative Example 2
- an electroless Ni—Pd After plating, only the substrate was washed and dried,
- Examples 4 to 9 showed the same solderability as Reference Example 1 and Reference Example 2 after 4 reflows, and in particular, as an alternative to Ni plating-Au plating on the copper wiring surface, which is a conventional technique. It can be seen that the surface treatment “Ni plating—Pd plating—treatment with the treatment agent of the present invention” can be used in the present invention. On the other hand, in Comparative Examples 2 and 3, the decrease in solder spread after reflow is severe.
- Example 4 The following evaluations were performed on the test substrates obtained in Example 4, Comparative Example 3, and Reference Example 1. Tables 2 to 4 show the evaluation results. Solder pull strength 30% rosin flux was applied to a 4mm ⁇ land (ball grid array), and the solder balls (Eco Solder Ball M705 0.4mm ⁇ ) were reflowed four times in the same manner as the evaluation of solder spread (after reflow). ), The solder was melted with a reflow apparatus (RF-330: manufactured by Nihon Pulse Co., Ltd.), and the pull strength was measured under the following conditions. Equipment used: Bond tester series 4000 (manufactured by Daisy) Measurement conditions: Pull strength: 300 ⁇ m / s, Temperature: 300 ° C. The pull strength was measured at 12 points. The average value, maximum value, and minimum value are shown below.
- Example 4 has a solder pull strength equivalent to that of Reference Example 1, but Comparative Example 3 has a low strength.
- solder shear strength 30% rosin flux was applied to a 4mm ⁇ land (ball grid array), and the solder balls (Eco Solder Ball M705 0.4mm ⁇ ) were reflowed four times in the same manner as the evaluation of solder spread (after reflow). ), The solder was melted with a reflow apparatus (RF-330: manufactured by Nihon Pulse Co., Ltd.), and the shear strength was measured under the following conditions.
- Equipment used Bond tester series 4000 (manufactured by Daisy) Measurement conditions: shear rate: 380 ⁇ m / s, shear height: 50 ⁇ m
- the solder shear strength was measured at 20 points. The average value, maximum value, and minimum value are shown below.
- solder shear mode After measuring the solder shear strength, the fracture surface was observed with a microscope and evaluated as follows. It can be determined that the A and B modes are non-defective. Table 4 shows the ratio (%). A: 100% solder break B: 50% or more solder break C: Less than 50% solder break D: 100% Ni break
- Example 4 has the same solderability as Reference Example 1, but in Comparative Example 3, the B mode increased. From the results of solder pull strength, solder shear strength, and solder shear mode, it can be seen that the Pd surface treated with the treatment agent of the present invention is also excellent in solderability.
- the surface of the copper provided in the electronic circuit or substrate is coated with a Ni film, then a Pd film or an alloy film containing Pd as a main component, and the surface has two or more phosphonic acid groups in one molecule.
- Surface treatment with a surface treatment agent comprising a solution in which one or more selected from the group consisting of a compound not containing an ester bond and / or a salt thereof and phosphoric acid is dissolved in a total of 0.01 g / L or more in a solvent.
- the oxidation resistance of the Ni—Pd or Pd-based alloy film covering the copper surface as a main component improves.
- the electronic component manufactured in the process including the surface treatment on the wiring portion using the surface treatment agent of the present invention has a remarkably improved contact stability.
- the surface treating agent of the present invention can also be used in connector terminals, and can be made into a connector terminal that is resistant to mechanical wear and is stable with little decrease in film due to wear.
Abstract
Description
したがって、はんだ接合面や接点の最終表面にAuめっきをする目的は、NiやPdの酸化を抑え、優れたはんだ性や接点性能を保つことである。逆の面からみると、無電解Ni-Auめっきや無電解Ni-Pd-Auめっきを施したはんだ接合面や接点は、最終表面に高価なAuを使用するため、めっき加工費が高価となる欠点がある。 On the other hand, plating on the surfaces of electronic parts such as substrates and lead frames to be joined with solder is generally performed by electrolytic Ni—Au, electrolytic Sn, electroless Sn, electroless Ag, electroless Ni—Au, Electrolytic Ni-Pd-Au and OSP (Organic Solderbility Preservatives, organic solderability protective agents, also known as heat resistant preflux) are widely used. Along with the increase in the density, products having independent pads are increasing on the substrate, and electroless plating or OSP treatment is effective. Electroless Ni—Au and electroless Ni—Pd—Au treatment is performed on a substrate having contacts such as independent pads in addition to the solder joint surface. Here, gold is a very stable metal and does not oxidize. On the other hand, Ni and Pd films are less oxidizable than copper, but are more easily oxidized than gold.
Therefore, the purpose of Au plating on the solder joint surface and the final surface of the contact is to suppress oxidation of Ni and Pd and to maintain excellent solderability and contact performance. Viewed from the opposite side, soldering surfaces and contacts that have undergone electroless Ni-Au plating or electroless Ni-Pd-Au plating use expensive Au on the final surface, which increases the cost of plating. There are drawbacks.
既に知られているOSP処理は、耐熱性、はんだ性の両面に優れており、はんだ接合面のみに限れば優れた技術と言える。しかしながら、同一基板内にはんだ接合面と接点とが混在する基板においては、特に接点において、有機処理であるため、力学的な磨耗に弱く、すぐに剥がれ、下地の銅が露出し、銅の酸化が進んでしまい抵抗値が低下する問題があった。接点においては、力学的な磨耗に強く、磨耗による皮膜の減少が少なく安定していることが望まれる。 As the surface treatment agent that suppresses oxidation, the surface treatment agent comprising the acidic phosphate ester and salt thereof of Patent Document 1 by the present inventors, or the antioxidant comprising the phosphoric acid diphenyl ester proposed in Patent Document 2 and the like. Although there are agents, both have ester bonds in the molecule, and the ester bonds are decomposed by heat treatment at a relatively high temperature (200 ° C or higher), so the oxidation of solder joints and electrical contacts in the lead-free solder reflow process The prevention cannot be solved.
The already known OSP treatment is excellent in both heat resistance and solderability, and can be said to be an excellent technique if it is limited only to the solder joint surface. However, in the case of a board where solder joint surfaces and contacts are mixed in the same board, the contact is organic processing, so it is vulnerable to mechanical wear and peels off immediately, exposing the underlying copper and oxidizing the copper. There is a problem that the resistance value is lowered due to the progress of the process. The contact point is desired to be stable against mechanical wear, with little decrease in film due to wear.
したがって、金を使わず、Pd上に安価な有機皮膜を張ることにより、Pd酸化抑制と優れたはんだ性と接点安定性を兼ね備える表面処理剤は未だ見出せていなかった。 Further, as a surface treatment agent, a total of 0.01 g / L or more of one or more of compounds having at least two phosphonic acid groups in one molecule and no ester bond in the molecule and / or a salt thereof. The surface treatment agent to be contained is described in Patent Document 4. Especially for Sn and Sn alloys, it has the effect of imparting oxidation resistance, improving solder wettability and suppressing the occurrence of whiskers, but when the surface treatment agent is used for copper wiring parts, There is no description regarding the solder joint and electrical contact oxidation control and contact stability in the reflow process.
Therefore, a surface treating agent that combines Pd oxidation inhibition, excellent solderability and contact stability by applying an inexpensive organic film on Pd without using gold has not yet been found.
また、本発明は、力学的磨耗に強く、磨耗による皮膜の減少が少なく安定しているコネクター端子を得るための表面処理剤を提供することを目的とする。 As mentioned above, electronic parts such as substrates and lead frames with copper surfaces have solder joints, contacts and connector terminals with copper surfaces, etc. Since the surface of copper is oxidized, a treatment for finally providing a gold film on the surface through, for example, a Ni film is performed. The purpose of making the final surface gold is to ensure excellent solderability and characteristics as a contact point, but there is a disadvantage that the cost of the plating process is expensive because expensive gold is used. Therefore, for example, a Ni—Pd film has been studied as a film that does not use gold while maintaining oxidation resistance superior to that of copper. However, when soldering is performed by a reflow process, it is exposed to heat exceeding 200 ° C. When this is done, the Pd surface is oxidized and there is a problem that the solder wettability is remarkably deteriorated. The present invention provides a surface treatment agent that suppresses the oxidation of the surface of metal, particularly Pd or an alloy containing the same as a main component, and improves the solderability such as solder wettability and solderability, and the characteristics as a contact. Objective.
Another object of the present invention is to provide a surface treatment agent for obtaining a connector terminal that is resistant to mechanical wear and is stable with little reduction in coating due to wear.
本発明者らが見出した有機皮膜は、一分子内に2個以上のホスホン酸基を持ち分子内にエステル結合を含まない化合物及び/又はその塩、並びにリン酸からなる群から選択される1種もしくは2種以上を合計で0.01g/L以上含む表面処理剤で表面処理してなる有機皮膜である。これにより、Pd又はPdを主成分とする合金表面に耐酸化性を付与しつつはんだ濡れ性を改善することができる。また、はんだ接合性も良好で、この表面処理を施したPd又はPdを主成分とする合金部を有する接点は、その接点としての特性維持に顕著な改善効果が見られた。
即ち、本発明は以下の通りである。 The present inventors formed an alloy film mainly composed of Ni—Pd or Pd on the copper surface, and stretched a specific organic film on the surface of the alloy mainly composed of Pd or Pd. The inventors have found that it is possible to prevent oxidation of the alloy surface as a main component and to minimize deterioration of solder wettability, and the present invention has been achieved.
The organic film found by the present inventors is selected from the group consisting of a compound having two or more phosphonic acid groups in one molecule and no ester bond in the molecule and / or a salt thereof, and phosphoric acid. It is an organic film formed by surface treatment with a surface treatment agent containing a total of 0.01 g / L or more of seeds or two or more. Thereby, solder wettability can be improved, providing oxidation resistance to the surface of Pd or an alloy containing Pd as a main component. Also, the solderability is good, and the contact having the surface treated Pd or the alloy part mainly composed of Pd has a remarkable improvement effect in maintaining the characteristics as the contact.
That is, the present invention is as follows.
(2)さらにハロゲン又はハロゲン化物塩を含有することを特徴とする前記(1)記載のPd又はPdを主成分とする合金の表面処理剤。
(3)前記一分子内に2個以上のホスホン酸基を持ち分子内にエステル結合を含まない化合物及び/又はその塩が下記式(I)、(II)又は(III)で表される化合物、及び/又はそのアルカリ金属塩、アンモニウム塩、又はアミン化合物との塩であることを特徴とする前記(1)又は(2)に記載のPd又はPdを主成分とする合金の表面処理剤。
(4)前記表面処理剤のpHが9以下であることを特徴とする前記(1)~(3)のいずれか一項に記載のPd又はPdを主成分とする合金の表面処理剤。
(5)さらに界面活性剤を含有することを特徴とする前記(1)~(4)のいずれか一項に記載のPd又はPdを主成分とする合金の表面処理剤。
(6)銅表面にNi膜、次いでPd膜又はPdを主成分とする合金膜が形成され、さらに、その表面に、前記(1)~(5)のいずれか一項に記載のPd又はPdを主成分とする合金の表面処理剤を用いて有機皮膜が形成されてなることを特徴とする銅表面の表面皮膜層構造。
(7)前記Ni膜及び/又はPd膜もしくはPdを主成分とする合金膜が無電解めっきにより形成された膜であることを特徴とする前記(6)に記載の銅表面の表面皮膜層構造。
(8)前記表面処理剤による有機皮膜の形成は、前記表面処理剤に浸漬、又は前記表面処理剤を塗布ないし噴霧のいずれかにより形成されることを特徴とする前記(6)又は(7)に記載の銅表面の表面皮膜層構造。
(9)前記(6)~(8)のいずれか一項に記載の銅表面の表面皮膜層構造を有することを特徴とする電子部品もしくは基板。
(10)前記(9)に記載の電子部品もしくは基板を用いたことを特徴とする装置。 (1) One or more selected from the group consisting of a compound having two or more phosphonic acid groups in one molecule and no ester bond in the molecule and / or a salt thereof, and phosphoric acid in total A surface treatment agent for Pd or an alloy containing Pd as a main component, characterized by comprising a solution dissolved in a solvent in an amount of 0.01 g / L or more.
(2) The surface treating agent for alloys containing Pd or Pd as a main component according to the above (1), further containing a halogen or a halide salt.
(3) A compound having two or more phosphonic acid groups in one molecule and having no ester bond in the molecule and / or a salt thereof represented by the following formula (I), (II) or (III) And / or an alkali metal salt, an ammonium salt, or a salt with an amine compound, the surface treatment agent for Pd or an alloy containing Pd as a main component according to (1) or (2).
(4) The surface treatment agent for Pd or an alloy containing Pd as a main component according to any one of (1) to (3), wherein the pH of the surface treatment agent is 9 or less.
(5) The surface treatment agent for Pd or an alloy containing Pd as a main component as described in any one of (1) to (4) above, further comprising a surfactant.
(6) A Ni film and then a Pd film or an alloy film containing Pd as a main component is formed on the copper surface, and further, Pd or Pd according to any one of the above (1) to (5) is formed on the surface. A surface film layer structure on a copper surface, wherein an organic film is formed using a surface treatment agent of an alloy containing as a main component.
(7) The surface film layer structure on the copper surface according to (6), wherein the Ni film and / or the Pd film or the alloy film containing Pd as a main component is a film formed by electroless plating. .
(8) The organic film formed by the surface treatment agent is formed by either immersing in the surface treatment agent or applying or spraying the surface treatment agent, (6) or (7) The surface film layer structure of the copper surface as described in 2.
(9) An electronic component or substrate having the surface coating layer structure on the copper surface according to any one of (6) to (8).
(10) An apparatus using the electronic component or substrate according to (9).
従って、電子回路もしくは基板がそなえる銅表面をNi膜、ついでPd膜又はPdを主成分とする合金膜で被覆し、さらにその表面を、本発明の表面処理剤でPd又はPdを主成分とする合金を表面処理することにより、高価なAuを用いなくても、Pd又はPdを主成分とする合金表面の耐酸化性を付与し、はんだ濡れ性を改善することができる。また、はんだ接合性にも優れている。
さらに、本発明の表面処理剤を用いた表面処理を含む工程で製造した電子部品は、その接点安定性が著しく改善される。
また、本発明の表面処理剤をコネクター端子に適用した場合には、接点と同様に力学的な磨耗に強く、磨耗による皮膜の減少が少なく安定している。しかもコストも安い。また、銅配線の場合と同じく、熱処理後のはんだ濡れ性の劣化や接触抵抗の上昇を解決することができる。 By applying a surface treatment to Pd or an alloy containing Pd as a main component using the surface treatment agent of the present invention, the surface of the alloy containing Pd or Pd as a main component is imparted with oxidation resistance and solder wettability is improved. Can do.
Therefore, the surface of the copper provided in the electronic circuit or substrate is covered with a Ni film, then with a Pd film or an alloy film containing Pd as a main component, and further, the surface is mainly composed of Pd or Pd with the surface treatment agent of the present invention. By surface-treating the alloy, the oxidation resistance of the surface of the alloy mainly composed of Pd or Pd can be imparted and solder wettability can be improved without using expensive Au. It also has excellent solderability.
Furthermore, the electronic component manufactured in the process including the surface treatment using the surface treatment agent of the present invention has a remarkably improved contact stability.
Further, when the surface treatment agent of the present invention is applied to a connector terminal, it is resistant to mechanical wear like a contact, and is stable with little decrease in film due to wear. Moreover, the cost is low. Further, as in the case of copper wiring, it is possible to solve the deterioration of solder wettability and the increase in contact resistance after heat treatment.
一分子内に2個以上のホスホン酸基を持ち、分子内にエステル結合を含まない化合物、及び/又はその塩としては、例えば下記一般式(I)、(II)、(III)で示される化合物、及び/又はそのアルカリ金属塩、アンモニウム塩、アミン化合物との塩が挙げられる。 In addition, a compound having two or more phosphonic acid groups in one molecule has a more detailed mechanism than a compound having one phosphonic acid group in one molecule, but is superior in oxidation resistance. found. The number of phosphonic acid groups in one molecule is preferably 2 to 6 in view of cost.
Examples of the compound having two or more phosphonic acid groups in one molecule and not containing an ester bond in the molecule and / or a salt thereof are represented by the following general formulas (I), (II), and (III). Examples thereof include compounds and / or salts thereof with alkali metal salts, ammonium salts, and amine compounds.
同様に、上記一般式(II)で表される化合物としては、エチレンジアミンテトラキスメチレンホスホン酸、ジエチレントリアミンペンタキスメチレンホスホン酸等が特に好ましく、上記一般式(III)で表される化合物としては、1-ヒドロキシエタン-1,1-ジホスホン酸等が特に好ましい。 As the compound represented by the general formula (I), nitrilotrismethylenephosphonic acid and the like are particularly preferable because they are industrially available.
Similarly, as the compound represented by the general formula (II), ethylenediaminetetrakismethylenephosphonic acid, diethylenetriaminepentakismethylenephosphonic acid and the like are particularly preferable. As the compound represented by the general formula (III), 1- Hydroxyethane-1,1-diphosphonic acid and the like are particularly preferable.
ハロゲン又はハロゲン化物塩としては、ハロゲン、ハロゲン化水素のアルカリ金属塩又はアンモニウム塩等が挙げられ、ヨウ素、ヨウ化水素のアルカリ金属塩又はアンモニウム塩、臭素、臭素化水素のアルカリ金属塩又はアンモニウム塩が好ましく、ヨウ化カリウム、ヨウ化ナトリウム、ヨウ化アンモニウム、臭素化カリム、臭素化ナトリウム、臭素化アンモニウムがより好ましい。 Moreover, it is preferable that the surface treating agent of this invention contains a halogen or halide salt further. The amount of the halogen or halide salt is preferably 0.01 g / L or more. If the amount is less than 0.01 g / L, the effect is small. Conversely, if the amount added is too large, the antioxidant property is deteriorated, and the cost is not preferable. / L is desirable, more desirably 0.1 to 100 g / L.
Examples of the halogen or halide salt include halogen, alkali metal salt or ammonium salt of hydrogen halide, iodine, alkali metal salt or ammonium salt of hydrogen iodide, bromine, alkali metal salt or ammonium salt of hydrogen bromide. Are preferable, and potassium iodide, sodium iodide, ammonium iodide, bromide kalim, sodium bromide, and ammonium bromide are more preferable.
界面活性剤としては、市販のアニオン系、カチオン系、ノニオン系、及び両性界面活性剤の1種もしくは2種以上を適宜選択して使用することができる。 Furthermore, by adding 0.01 to 10 g / L of a surfactant to the aqueous surface treatment agent and adjusting the pH to 5 or less, the oxidation resistance of the surface to be treated is further improved. Even if the addition amount of the surfactant is less than 0.01 g / L or more than 10 g / L, the effect of oxidation resistance cannot be obtained. The addition amount of the surfactant is preferably 0.1 to 10 g / L.
As the surfactant, one or more commercially available anionic, cationic, nonionic, and amphoteric surfactants can be appropriately selected and used.
以下に本発明の銅表面の表面皮膜層構造について詳述する。
本発明の銅表面の表面皮膜層構造は、電子部品もしくは基板が備える銅表面にNi膜、さらにPd膜又はPdを主成分とする合金膜が形成され、さらに本発明の表面処理剤で処理されて有機皮膜が形成されてなる。 The surface treating agent of the present invention can improve the oxidation resistance of the surface of Pd or an alloy containing Pd as a main component. The Pd or an alloy containing Pd as a main component is not particularly limited, but is particularly suitable for the treatment of wiring portions, contacts, and connector terminals having a specific copper surface.
The surface coating layer structure on the copper surface of the present invention will be described in detail below.
The surface coating layer structure on the copper surface of the present invention is formed by forming a Ni film, a Pd film or an alloy film containing Pd as a main component on the copper surface of the electronic component or substrate, and further treating with a surface treatment agent of the present invention. An organic film is formed.
また、本発明の表面処理剤で処理される金属は、Pd又はそれを主成分とする合金である。Pdを主成分とする合金としては、Pd-P、Pd-Ni、Pd-Co、Pd-Au、Pd-Ag、Pd-In等が挙げられ、Pd-Pの場合、リンの含有率は1~10重量%が好ましく、2~6重量%がより好ましい。
必要に応じてNi膜とPd膜又はPdを主成分とする合金膜との間に別種の金属膜を追加してもよい。
尚、本発明において、Niを主成分とする合金、及びPdを主成分とする合金とは、合金中Ni、及びPdをそれぞれ50重量%以上含有する合金を言う。 The Ni film may be an alloy film containing Ni as a main component. Examples of the alloy containing Ni as a main component include Ni-P and Ni-B. In the case of Ni—P, the phosphorus content is preferably 2 to 13% by weight, more preferably 5 to 12% by weight. Ni-B is used for the electronic component. In the case of Ni—B, the boron content is preferably 1 to 5% by weight, and more preferably 2 to 4% by weight.
Moreover, the metal processed with the surface treating agent of this invention is Pd or an alloy which has it as a main component. Pd—P, Pd—Ni, Pd—Co, Pd—Au, Pd—Ag, Pd—In, and the like are listed as alloys containing Pd as a main component. In the case of Pd—P, the phosphorus content is 1 It is preferably ˜10% by weight, and more preferably 2 to 6% by weight.
If necessary, another kind of metal film may be added between the Ni film and the Pd film or an alloy film containing Pd as a main component.
In the present invention, an alloy containing Ni as a main component and an alloy containing Pd as a main component mean an alloy containing Ni and Pd in the alloy by 50% by weight or more.
用いる無電解めっき液は公知のめっき液を用いることができる。
Ni膜は銅の拡散を防止する。銅の拡散を防止するためにはNi膜の厚さは0.5μm以上が好ましい。上限は特にないが、無電解めっきでNi膜を形成することを考慮すると15μm以下が好ましい。従って、Ni膜の厚さは、0.5~15μmが好ましく、2~8μmがより好ましい。
Pd膜又はPdを主成分とする合金膜の厚さは0.005~0.5μmが好ましく、0.01~0.1μmがより好ましい。Pd膜又はPdを主成分とする合金膜は薄いほどよいが、0.005μm未満では特性が発揮できない。厚い分には特性に影響せず制限はないが、コストの問題があり、0.5μm以下が好ましい。
また、本発明の表面処理剤で形成される有機皮膜の厚さは0.1nm~10nmが好ましい。厚さが0.1nm未満であると効果が小さく、10nmを超えるとはんだ濡れ性が悪くなる。 The Ni film and / or the Pd film or the alloy film containing Pd as a main component is preferably formed by electroless plating instead of electrolytic plating in order to apply plating to a complex circuit with a uniform thickness. In the case of electrolytic plating, variations in the plating film occur due to the fact that a complicated circuit connection must be considered in order to pass a current and the potential difference due to the resistance of the circuit.
As the electroless plating solution to be used, a known plating solution can be used.
The Ni film prevents copper diffusion. In order to prevent copper diffusion, the thickness of the Ni film is preferably 0.5 μm or more. Although there is no particular upper limit, it is preferably 15 μm or less in consideration of forming the Ni film by electroless plating. Therefore, the thickness of the Ni film is preferably 0.5 to 15 μm, and more preferably 2 to 8 μm.
The thickness of the Pd film or the alloy film containing Pd as a main component is preferably 0.005 to 0.5 μm, and more preferably 0.01 to 0.1 μm. The thinner the Pd film or the alloy film containing Pd as a main component, the better. However, if it is less than 0.005 μm, the characteristics cannot be exhibited. The thick portion does not affect the characteristics and is not limited. However, there is a problem of cost, and 0.5 μm or less is preferable.
The thickness of the organic film formed with the surface treating agent of the present invention is preferably 0.1 nm to 10 nm. If the thickness is less than 0.1 nm, the effect is small, and if it exceeds 10 nm, the solder wettability is deteriorated.
また無電解Auめっき皮膜のビッカーズ硬度は70Hv、Pd-Pのビッカーズ硬度は400Hv前後、純Pdのビッカーズ硬度は300Hvであるので、本発明の電子部品及び基板は、Au皮膜より硬く、耐磨耗性に優れ、接点としての特性に優れている。
前記電子部品及び基板は、液晶ディスプレイ、携帯電話等の装置に好適に用いることができる。
また、本発明の、銅表面上にNi膜、さらにPd膜又はPdを主成分とする合金膜が形成され、さらに本発明の表面処理剤で処理されて有機皮膜が形成されてなる表面皮膜層構造は、コネクター端子においても、接点と同様力学的な磨耗に強く、磨耗による皮膜の減少が少なく安定しており、有効である。また、コネクター端子を長期間に渡って継続使用するような場合は、処理表面の有機皮膜の一部に剥離が生じる恐れも想定されるが、そのような場合最外面にPd皮膜又はPdを主成分とする合金皮膜が露出されることとなるがPd皮膜及びPdを主成分とする合金皮膜は金皮膜より硬く、耐摩耗性に優れており、コスト的にも安価である。また、銅配線の場合と同じく、熱処理後のはんだ濡れ性の劣化や接触抵抗の上昇を解決することができる。
なお、コネクター端子の場合は、Ni膜、Pd膜及びPdを主成分とする合金膜は電気めっきで形成してもよく、電気Niめっき液、電気Pdめっき液、電気Pdを主成分とする合金めっき液としては公知のめっき液を用いることができる。 By the surface treatment of the present invention, by treating the surface of the electronic component or the conductor surface of the connection terminal portion of the substrate, particularly the surface on which the Ni film, further the Pd film or the alloy film mainly composed of Pd is formed on the copper surface, An electronic component or substrate having excellent oxidation resistance and improved solder wettability can be obtained. Moreover, it can be set as the electronic component or board | substrate excellent also in solderability.
The electroless Au plating film has a Vickers hardness of 70 Hv, Pd—P has a Vickers hardness of around 400 Hv, and pure Pd has a Vickers hardness of 300 Hv. Therefore, the electronic component and the substrate of the present invention are harder than the Au film and wear resistant. Excellent contact properties and contact characteristics.
The electronic component and the substrate can be suitably used for devices such as a liquid crystal display and a mobile phone.
Further, the surface coating layer according to the present invention, in which an Ni film, further a Pd film or an alloy film containing Pd as a main component is formed on the copper surface, and is further processed with the surface treatment agent of the present invention to form an organic film. The structure of the connector terminal is also effective because it is resistant to mechanical wear as well as the contact point, and is stable with little decrease in coating due to wear. Further, when the connector terminal is continuously used for a long period of time, there is a possibility that a part of the organic film on the treated surface may be peeled off. In such a case, Pd film or Pd is mainly used on the outermost surface. Although the alloy film as a component is exposed, the Pd film and the alloy film containing Pd as a main component are harder than the gold film, have excellent wear resistance, and are inexpensive. Further, as in the case of copper wiring, it is possible to solve the deterioration of solder wettability and the increase in contact resistance after heat treatment.
In the case of a connector terminal, the Ni film, the Pd film, and the alloy film containing Pd as a main component may be formed by electroplating, and an electric Ni plating solution, an electric Pd plating solution, or an alloy containing electric Pd as a main component. A known plating solution can be used as the plating solution.
実施例1~9
一分子内に2個以上のホスホン酸基を持ち、分子内にエステル結合を含まない化合物又はその塩を有効成分とする水溶液を9種類調製した(実施例1~9)。内訳を表1に示す。 Hereinafter, the present invention will be described in detail with reference to examples.
Examples 1 to 9
Nine types of aqueous solutions containing two or more phosphonic acid groups in one molecule and having no ester bond in the molecule or a salt thereof were prepared (Examples 1 to 9). The breakdown is shown in Table 1.
脱脂(KG-511日鉱商事製、45℃、5分)
→湯洗→水洗
→ソフトエッチング
(過硫酸Na:100g/L、96%-硫酸:15ml/L、25℃、1分)
→水洗
→酸浸漬(96%-硫酸、25℃、2分)
→水洗
→プレディップ(35%-塩酸、25℃、1分)
→アクチベーター(KG-529日鉱商事製、25℃、2分)
→水洗
→酸浸漬(96%-硫酸、30ml/L、25℃、10秒)
→無電解Niめっき(KG-535日鉱商事製、80℃、30分)
→水洗
→無電解Pdめっき
(KG-1100日鉱商事製、50℃、3分) A FR-4 base material with a thickness of 0.8 mm was used as a test substrate, and two types of copper lands, a 4 mm square land (used for solder spreading) and a 0.4 mmφ land (pulled, used for shear evaluation) were prepared. . Both are over resist types. The following treatment was performed on this base material.
Degreasing (KG-511, manufactured by Mining Corporation, 45 ° C, 5 minutes)
→ Washing → Washing → Soft etching (Na persulfate: 100g / L, 96% -Sulfuric acid: 15ml / L, 25 ° C, 1 minute)
→ Washing → Acid soaking (96% -sulfuric acid, 25 ° C, 2 minutes)
→ Washing → Pre-dip (35% -hydrochloric acid, 25 ° C, 1 minute)
→ Activator (KG-529, manufactured by Mining Corporation, 25 ° C, 2 minutes)
→ Washing → Acid soaking (96% -sulfuric acid, 30ml / L, 25 ° C, 10 seconds)
→ Electroless Ni plating (KG-535, manufactured by Mining Corporation, 80 ° C, 30 minutes)
→ Washing → Electroless Pd plating (KG-1100 manufactured by Mining Corporation, 50 ℃, 3 minutes)
尚、前記無電解Niめっきにより形成されたNi膜、無電解Pdめっきにより形成されたPd膜厚さを蛍光X線膜厚計(セイコーインスツルメンツ製)で、処理剤により形成された有機皮膜の厚さをオージェ分光のデプスプロファイルで測定した結果、Ni膜厚:5μm、Pd膜厚:0.1μm、有機皮膜の厚さ:1nmであった。 The copper wiring on the substrate is Ni-treated by electroless plating and then Pd-treated by the above process, and further immersed in the treatment agent shown in Examples 1 to 9 at a bath temperature of 40 ° C. for 30 seconds, followed by washing with water. The dried substrate was used as a test substrate.
The Ni film formed by the electroless Ni plating and the Pd film thickness formed by the electroless Pd plating were measured with a fluorescent X-ray film thickness meter (manufactured by Seiko Instruments), and the thickness of the organic film formed by the treatment agent. As a result of measuring the thickness with a depth profile of Auger spectroscopy, the Ni film thickness was 5 μm, the Pd film thickness was 0.1 μm, and the thickness of the organic film was 1 nm.
はんだ広がりの評価
30%ロジンフラックスを上記で形成した4mm角銅ランド上の4mm角バッドに塗布し、はんだボール(エコソルダーボールM705 0.4mmφ)を搭載し、リフロー装置(RF-330:日本パルス製)にて、以下に示す熱履歴条件ではんだを溶融させ、はんだ広がり(リフロー前)を測定した。
熱履歴は以下の通りである。
プレヒート:165℃
リフロー温度:215℃(ピーク温度256℃)
リフロー炉内の移動速度:毎分17cm
炉投入から取出しまで8分とした。
また、上記熱履歴の条件によるリフローを4回行った試験基板も作製し、同様にはんだボールを搭載し、はんだ広がり(リフロー後)の評価を行った。 The following evaluations were performed on these test substrates. Table 1 shows the test results.
Evaluation of solder spread 30% rosin flux is applied to the 4mm square pad on the 4mm square copper land formed above, solder ball (Eco Solderball M705 0.4mmφ) is mounted, and reflow device (RF-330: Nippon Pulse) Manufactured), the solder was melted under the following heat history conditions, and the solder spread (before reflow) was measured.
The heat history is as follows.
Preheat: 165 ° C
Reflow temperature: 215 ° C (peak temperature 256 ° C)
Movement speed in reflow furnace: 17cm / min
It took 8 minutes from the introduction of the furnace to the removal.
In addition, a test substrate that had been reflowed four times under the above-described thermal history conditions was prepared, and solder balls were mounted in the same manner to evaluate solder spread (after reflow).
表面処理を表1に記載したとおり、本発明の表面処理剤以外の表面処理剤による有機処理、有機処理を行わないもの、無電解Ni-Au、OSP処理とした以外は、実施例1で作製したと同じ工程で試験基盤を作製し、それぞれ評価した。
すなわち、ホスホン酸成分の濃度が下限以下の処理剤で処理した基材(比較例1)、ホスホン酸成分が本発明外の処理剤で処理した基材(比較例2)、無電解Ni-Pdめっきの後水洗乾燥のみとし、表面処理を省略した基材(比較例3)を評価した。また、無電解Ni-Pdめっきの代わりに無電解Ni-Auめっきをした場合(参考例1)、無電解Ni-PdめっきをせずにOSP処理した場合(参考例2)も併せて評価した。試験結果を併せて表1に示す。 Comparative Examples 1 to 3 and Reference Examples 1 to 2
As described in Table 1, the surface treatment was prepared in Example 1 except that the organic treatment with the surface treatment agent other than the surface treatment agent of the present invention, the organic treatment not performed, the electroless Ni—Au, and the OSP treatment were used. Test bases were produced and evaluated in the same process.
That is, a base material treated with a treating agent having a phosphonic acid component concentration lower than the lower limit (Comparative Example 1), a base material treated with a treating agent other than the present invention (Comparative Example 2), an electroless Ni—Pd After plating, only the substrate was washed and dried, and the substrate (Comparative Example 3) from which the surface treatment was omitted was evaluated. Also, the case where electroless Ni—Au plating was performed instead of electroless Ni—Pd plating (Reference Example 1) and the case where OSP treatment was performed without electroless Ni—Pd plating (Reference Example 2) were also evaluated. . The test results are also shown in Table 1.
はんだプル強度
30%ロジンフラックスを4mmφのランド(ボールグリッドアレイ)に塗布し、はんだ広がり(リフロー後)の評価と同様に、リフローを4回行った後、はんだボール(エコソルダーボールM705 0.4mmφ)を搭載し、リフロー装置(RF-330:日本パルス製)にてはんだを溶解させ、プル強度を以下の条件で測定した。
使用機器:ボンドテスターシリーズ4000(デイジ社製)
測定条件:プル強度:300μm/s、温度:300℃
尚、プル強度の測定は12点行った。その平均値、最大値、最小値を以下に示す。 The following evaluations were performed on the test substrates obtained in Example 4, Comparative Example 3, and Reference Example 1. Tables 2 to 4 show the evaluation results.
Solder pull strength 30% rosin flux was applied to a 4mmφ land (ball grid array), and the solder balls (Eco Solder Ball M705 0.4mmφ) were reflowed four times in the same manner as the evaluation of solder spread (after reflow). ), The solder was melted with a reflow apparatus (RF-330: manufactured by Nihon Pulse Co., Ltd.), and the pull strength was measured under the following conditions.
Equipment used: Bond tester series 4000 (manufactured by Daisy)
Measurement conditions: Pull strength: 300 μm / s, Temperature: 300 ° C.
The pull strength was measured at 12 points. The average value, maximum value, and minimum value are shown below.
30%ロジンフラックスを4mmφのランド(ボールグリッドアレイ)に塗布し、はんだ広がり(リフロー後)の評価と同様に、リフローを4回行った後、はんだボール(エコソルダーボールM705 0.4mmφ)を搭載し、リフロー装置(RF-330:日本パルス製)にてはんだを溶解させ、シェア強度を以下の条件で測定した。
使用機器:ボンドテスターシリーズ4000(デイジ社製)
測定条件:シェア速度:380μm/s、シェア高さ:50μm
尚、はんだシェア強度の測定は20点行った。その平均値、最大値、最小値を以下に示す。 Solder shear strength 30% rosin flux was applied to a 4mmφ land (ball grid array), and the solder balls (Eco Solder Ball M705 0.4mmφ) were reflowed four times in the same manner as the evaluation of solder spread (after reflow). ), The solder was melted with a reflow apparatus (RF-330: manufactured by Nihon Pulse Co., Ltd.), and the shear strength was measured under the following conditions.
Equipment used: Bond tester series 4000 (manufactured by Daisy)
Measurement conditions: shear rate: 380 μm / s, shear height: 50 μm
The solder shear strength was measured at 20 points. The average value, maximum value, and minimum value are shown below.
はんだシェア強度を測定した後に、顕微鏡にて破断面を観察し、以下のように評価した。A、Bモードが良品と判断できる。表4にその割合(%)を示す。
A:100%はんだ間破壊
B:50%以上はんだ間破壊
C:50%未満はんだ間破壊
D:100%Ni破壊 Solder shear mode After measuring the solder shear strength, the fracture surface was observed with a microscope and evaluated as follows. It can be determined that the A and B modes are non-defective. Table 4 shows the ratio (%).
A: 100% solder break B: 50% or more solder break C: Less than 50% solder break D: 100% Ni break
はんだプル強度、はんだシェア強度、はんだシェアモードの結果より、本発明の処理剤で処理したPd表面ははんだ接合性にも優れていることが分かる。
From the results of solder pull strength, solder shear strength, and solder shear mode, it can be seen that the Pd surface treated with the treatment agent of the present invention is also excellent in solderability.
この表面処理剤のpHを5以下にすることにより、更に界面活性剤を0.01~10g/L含有させることにより銅表面を被覆するNi-Pd又はPdを主成分とする合金膜の耐酸化性が向上する。
また、本発明の表面処理剤を用いた配線部への表面処理を含む工程で製造した電子部品は、その接点安定性が著しく改善される。
又、本発明の表面処理剤は、コネクター端子においても用いることができ、力学的磨耗に強く、磨耗による皮膜の減少が少なく安定しているコネクター端子とすることができる。そして、長期間に渡って継続使用するような場合、処理表面の有機皮膜の一部に剥離が生じて最外面にPd又はPdを主成分とする合金が露出する恐れも想定されるが、そのような場合においても、Pd皮膜及びPdを主成分とする合金皮膜は金皮膜より硬いため、耐摩耗性に優れ、しかもコストも安い。また、銅配線の場合と同じく、熱処理後のはんだ濡れ性の劣化や接触抵抗の上昇を解決することができる。 The surface of the copper provided in the electronic circuit or substrate is coated with a Ni film, then a Pd film or an alloy film containing Pd as a main component, and the surface has two or more phosphonic acid groups in one molecule. Surface treatment with a surface treatment agent comprising a solution in which one or more selected from the group consisting of a compound not containing an ester bond and / or a salt thereof and phosphoric acid is dissolved in a total of 0.01 g / L or more in a solvent. By doing so, oxidation resistance of the surface of Pd or an alloy containing Pd as a main component can be imparted, and solder wettability can be improved. Also, solderability is good.
By reducing the pH of this surface treatment agent to 5 or less and further containing 0.01 to 10 g / L of surfactant, the oxidation resistance of the Ni—Pd or Pd-based alloy film covering the copper surface as a main component Improves.
Moreover, the electronic component manufactured in the process including the surface treatment on the wiring portion using the surface treatment agent of the present invention has a remarkably improved contact stability.
The surface treating agent of the present invention can also be used in connector terminals, and can be made into a connector terminal that is resistant to mechanical wear and is stable with little decrease in film due to wear. And, when it is used continuously for a long period of time, there is a possibility that peeling occurs in a part of the organic film on the treated surface and Pd or an alloy containing Pd as a main component is exposed on the outermost surface. Even in such a case, since the Pd film and the alloy film containing Pd as a main component are harder than the gold film, the wear resistance is excellent and the cost is low. Further, as in the case of copper wiring, it is possible to solve the deterioration of solder wettability and the increase in contact resistance after heat treatment.
Claims (10)
- 一分子内に2個以上のホスホン酸基を持ち分子内にエステル結合を含まない化合物及び/又はその塩、並びにリン酸からなる群から選択される1種もしくは2種以上を合計で0.01g/L以上溶媒に溶解した液からなることを特徴とするPd又はPdを主成分とする合金の表面処理剤。 0.01 g in total of one or more compounds selected from the group consisting of a compound having two or more phosphonic acid groups in one molecule and no ester bond in the molecule and / or a salt thereof, and phosphoric acid A surface treatment agent for Pd or an alloy containing Pd as a main component, comprising: / L or more of a solution dissolved in a solvent.
- さらにハロゲン又はハロゲン化物塩を含有することを特徴とする請求項1記載のPd又はPdを主成分とする合金の表面処理剤。 The surface treatment agent for Pd or an alloy containing Pd as a main component according to claim 1, further comprising a halogen or a halide salt.
- 前記一分子内に2個以上のホスホン酸基を持ち分子内にエステル結合を含まない化合物及び/又はその塩が下記式(I)、(II)又は(III)で表される化合物、及び/又はそのアルカリ金属塩、アンモニウム塩、又はアミン化合物との塩であることを特徴とする請求項1又は2に記載のPd又はPdを主成分とする合金の表面処理剤。
- 前記表面処理剤のpHが9以下であることを特徴とする請求項1~3のいずれか一項に記載のPd又はPdを主成分とする合金の表面処理剤。 The surface treatment agent for Pd or an alloy containing Pd as a main component according to any one of claims 1 to 3, wherein the pH of the surface treatment agent is 9 or less.
- さらに界面活性剤を含有することを特徴とする請求項1~4のいずれか一項に記載のPd又はPdを主成分とする合金の表面処理剤。 The surface treatment agent for Pd or an alloy containing Pd as a main component according to any one of claims 1 to 4, further comprising a surfactant.
- 銅表面にNi膜、次いでPd膜又はPdを主成分とする合金膜が形成され、さらに、その表面に、請求項1~5のいずれか一項に記載のPd又はPdを主成分とする合金の表面処理剤を用いて有機皮膜が形成されてなることを特徴とする銅表面の表面皮膜層構造。 6. An Ni film and then a Pd film or an alloy film containing Pd as a main component is formed on a copper surface, and further, Pd or an alloy containing Pd as a main component according to any one of claims 1 to 5 is formed on the surface. A surface film layer structure on a copper surface, wherein an organic film is formed using the surface treatment agent.
- 前記Ni膜及び/又はPd膜もしくはPdを主成分とする合金膜が無電解めっきにより形成された膜であることを特徴とする請求項6に記載の銅表面の表面皮膜層構造。 The surface film layer structure on a copper surface according to claim 6, wherein the Ni film and / or the Pd film or an alloy film containing Pd as a main component is a film formed by electroless plating.
- 前記表面処理剤による有機皮膜の形成は、前記表面処理剤に浸漬、又は前記表面処理剤を塗布ないし噴霧のいずれかにより形成されることを特徴とする請求項6又は7に記載の銅表面の表面皮膜層構造。 The formation of the organic film by the surface treatment agent is formed by either immersing in the surface treatment agent or applying or spraying the surface treatment agent. Surface film layer structure.
- 請求項6~8のいずれか一項に記載の銅表面の表面皮膜層構造を有することを特徴とする電子部品もしくは基板。 An electronic component or substrate having the surface coating layer structure on the copper surface according to any one of claims 6 to 8.
- 請求項9に記載の電子部品もしくは基板を用いたことを特徴とする装置。 An apparatus using the electronic component or the substrate according to claim 9.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012530003A JP5649139B2 (en) | 2010-12-01 | 2011-11-24 | Surface coating layer structure on copper surface |
CN2011800100004A CN102782189A (en) | 2010-12-01 | 2011-11-24 | Surface treatment agent for pd or alloy mainly composed of pd, and surface coating layer structure of copper surface |
KR1020127019227A KR101418194B1 (en) | 2010-12-01 | 2011-11-24 | SURFACE TREATMENT AGENT FOR Pd OR ALLOY MAINLY COMPOSED OF Pd, AND SURFACE COATING LAYER STRUCTURE OF COPPER SURFACE |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010-268657 | 2010-12-01 | ||
JP2010268657 | 2010-12-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012073783A1 true WO2012073783A1 (en) | 2012-06-07 |
Family
ID=46171725
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2011/077039 WO2012073783A1 (en) | 2010-12-01 | 2011-11-24 | Surface treatment agent for pd or alloy mainly composed of pd, and surface coating layer structure of copper surface |
Country Status (5)
Country | Link |
---|---|
JP (1) | JP5649139B2 (en) |
KR (1) | KR101418194B1 (en) |
CN (1) | CN102782189A (en) |
TW (1) | TWI458856B (en) |
WO (1) | WO2012073783A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016515666A (en) * | 2013-03-25 | 2016-05-30 | アトテツク・ドイチユラント・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツングAtotech Deutschland GmbH | Method for activating copper surface for electroless plating |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104894569B (en) * | 2015-06-30 | 2018-03-02 | 长沙理工大学 | A kind of Ni Pd metal conditioners |
CN106544658A (en) * | 2016-11-23 | 2017-03-29 | 三星半导体(中国)研究开发有限公司 | For processing the method and reagent and surface-treated copper cash of bare copper wire |
CN115070259A (en) * | 2022-07-15 | 2022-09-20 | 深圳市同方电子新材料有限公司 | Novel environment-friendly lead-free soldering paste of superfine soldering tin powder |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10237691A (en) * | 1997-02-20 | 1998-09-08 | Samsung Aerospace Ind Ltd | Multilayer plated lead frame |
JPH11286798A (en) * | 1998-02-05 | 1999-10-19 | Matsushita Electric Works Ltd | Sealing agent |
WO2005085498A1 (en) * | 2004-03-05 | 2005-09-15 | Nippon Mining & Metals Co., Ltd. | Metal surface treating agent |
JP2007273982A (en) * | 2007-03-26 | 2007-10-18 | Hitachi Ltd | Method of manufacturing semiconductor module |
JP2008513339A (en) * | 2004-09-21 | 2008-05-01 | ウスター ポリテクニック インスティチュート | Reactor and method for steam reforming |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010242194A (en) * | 2009-04-09 | 2010-10-28 | Okuno Chem Ind Co Ltd | Activation liquid for pretreatment of displacement deposition type electroless gold plating |
-
2011
- 2011-11-24 WO PCT/JP2011/077039 patent/WO2012073783A1/en active Application Filing
- 2011-11-24 CN CN2011800100004A patent/CN102782189A/en active Pending
- 2011-11-24 JP JP2012530003A patent/JP5649139B2/en active Active
- 2011-11-24 KR KR1020127019227A patent/KR101418194B1/en active IP Right Grant
- 2011-11-30 TW TW100143889A patent/TWI458856B/en active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10237691A (en) * | 1997-02-20 | 1998-09-08 | Samsung Aerospace Ind Ltd | Multilayer plated lead frame |
JPH11286798A (en) * | 1998-02-05 | 1999-10-19 | Matsushita Electric Works Ltd | Sealing agent |
WO2005085498A1 (en) * | 2004-03-05 | 2005-09-15 | Nippon Mining & Metals Co., Ltd. | Metal surface treating agent |
JP2008513339A (en) * | 2004-09-21 | 2008-05-01 | ウスター ポリテクニック インスティチュート | Reactor and method for steam reforming |
JP2007273982A (en) * | 2007-03-26 | 2007-10-18 | Hitachi Ltd | Method of manufacturing semiconductor module |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016515666A (en) * | 2013-03-25 | 2016-05-30 | アトテツク・ドイチユラント・ゲゼルシヤフト・ミツト・ベシユレンクテル・ハフツングAtotech Deutschland GmbH | Method for activating copper surface for electroless plating |
Also Published As
Publication number | Publication date |
---|---|
JPWO2012073783A1 (en) | 2014-05-19 |
TWI458856B (en) | 2014-11-01 |
KR20120095482A (en) | 2012-08-28 |
CN102782189A (en) | 2012-11-14 |
JP5649139B2 (en) | 2015-01-07 |
KR101418194B1 (en) | 2014-07-31 |
TW201231719A (en) | 2012-08-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100964063B1 (en) | Aqueous antioxidant for tin or tin alloy | |
JP4733468B2 (en) | Metal surface treatment aqueous solution and method for preventing discoloration of metal surface | |
USRE45297E1 (en) | Method for enhancing the solderability of a surface | |
JP5649139B2 (en) | Surface coating layer structure on copper surface | |
KR101689914B1 (en) | Method for electroless plating of tin and tin alloys | |
JP4518507B2 (en) | Metal surface treatment agent | |
KR102280838B1 (en) | Method of selectively treating copper in the presence of further metal | |
JP5337760B2 (en) | Metal surface treatment aqueous solution and method for preventing discoloration of metal surface | |
KR102217484B1 (en) | Method for surface treating semiconductor substrate, method for manufacturing semiconductor package, and water soluble preflux used therein | |
JP2004137574A (en) | SURFACE TREATMENT AGENT AND SURFACE TREATMENT METHOD FOR Sn ALLOY | |
US6090493A (en) | Bismuth coating protection for copper | |
WO1998049367A1 (en) | Bismuth coating protection for copper | |
US7267259B2 (en) | Method for enhancing the solderability of a surface | |
JP5137317B2 (en) | Electronic components | |
JP2008266712A (en) | Electroless gold plating method for electronic component, and electronic component | |
JP2004156094A (en) | SURFACE TREATING AGENT AND METHOD FOR Sn OR Sn ALLOY | |
USRE45842E1 (en) | Method for enhancing the solderability of a surface | |
KR20090046513A (en) | Pre-flux performing selective coating for pwb | |
JP5697641B2 (en) | Surface treatment agent for Sn and Sn alloy | |
JP5458198B2 (en) | Metal surface treatment aqueous solution and method for preventing discoloration of metal surface | |
JP2022054426A (en) | Surface treatment method of printed wiring board and manufacturing method of printed wiring board | |
JP2000280066A (en) | Forming method of non-lead jointing member | |
JP2020128574A (en) | Composition and etching method |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201180010000.4 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2012530003 Country of ref document: JP |
|
ENP | Entry into the national phase |
Ref document number: 20127019227 Country of ref document: KR Kind code of ref document: A |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 11844472 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 11844472 Country of ref document: EP Kind code of ref document: A1 |