WO2007132819A1 - 銅張積層板の製造方法、カバーレイの製造方法及びフレキシブルプリント基板の製造方法 - Google Patents
銅張積層板の製造方法、カバーレイの製造方法及びフレキシブルプリント基板の製造方法 Download PDFInfo
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- WO2007132819A1 WO2007132819A1 PCT/JP2007/059891 JP2007059891W WO2007132819A1 WO 2007132819 A1 WO2007132819 A1 WO 2007132819A1 JP 2007059891 W JP2007059891 W JP 2007059891W WO 2007132819 A1 WO2007132819 A1 WO 2007132819A1
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- acid
- clad laminate
- coverlay
- alicyclic
- producing
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/28—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42
- B32B27/281—Layered products comprising a layer of synthetic resin comprising synthetic resins not wholly covered by any one of the sub-groups B32B27/30 - B32B27/42 comprising polyimides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1003—Preparatory processes
- C08G73/1007—Preparatory processes from tetracarboxylic acids or derivatives and diamines
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G73/00—Macromolecular compounds obtained by reactions forming a linkage containing nitrogen with or without oxygen or carbon in the main chain of the macromolecule, not provided for in groups C08G12/00 - C08G71/00
- C08G73/06—Polycondensates having nitrogen-containing heterocyclic rings in the main chain of the macromolecule
- C08G73/10—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
- C08G73/1075—Partially aromatic polyimides
- C08G73/1082—Partially aromatic polyimides wholly aromatic in the tetracarboxylic moiety
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/032—Organic insulating material consisting of one material
- H05K1/0346—Organic insulating material consisting of one material containing N
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
- H05K3/281—Applying non-metallic protective coatings by means of a preformed insulating foil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/75—Printability
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0154—Polyimide
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
Definitions
- the present invention relates to a method for producing a copper clad laminate having a polyimide layer and a coverlay, and a method for producing a flexible printed board using the copper clad laminate and the coverlay.
- a flexible printed circuit board has a structure in which a circuit pattern is formed on a copper foil of a copper clad laminate, and a coverlay is bonded to insulate and protect the circuit pattern.
- Fig. 1 is a side cross-sectional view showing an example.
- reference numeral 1 is a copper clad laminate
- 2 is a copper foil
- 3 is a base material of the copper clad laminate
- 4 is a cover lay
- 5 is a base of the cover lay.
- 6 is an adhesive layer
- 7 is a flexible printed circuit board.
- a copper clad laminate 1 used for the flexible printed circuit board 7 is formed by laminating a copper foil 2 on one (or both) surfaces of a base material 3, and the copper foil 2 is made of copper etching or the like.
- a circuit pattern is formed using an appropriate method.
- the base material 3 for example, a plastic film such as polyimide, polyethylene terephthalate, or polyethylene naphthalate is used.
- the coverlay 4 used for the flexible printed circuit board 7 is formed by coating an adhesive layer 6 made of a thermosetting adhesive on one surface of a base material 5, and a release paper on the adhesive layer 6.
- a release film carrier film
- a plastic film such as polyimide, polyethylene terephthalate, or polyethylene naphthalate is used as the base material 5.
- the release paper or release film When bonding the coverlay 4 to the copper clad laminate 1, the release paper or release film The coverlay 4 from which the film has been peeled is placed on the copper-clad laminate 1 and heat-treated under predetermined conditions. By this heat treatment, the adhesive layer 6 is thermally cured, the circuit pattern is insulated and protected, and the copper-clad laminate 1 and the coverlay 4 are bonded to obtain the flexible printed board 7.
- the coverlay 4 needs to carry out an outer shape opening according to the shape of the flexible printed circuit board 7. Before the cover lay is bonded to the copper clad laminate 1, this outer shape 'opening is processed with a mold or the like with the release paper or release film attached. A certain ladies, after laminating an unsatisfactory coverlay 4 on the copper-clad laminate 1 and then laser-scanning a desired portion of the coverlay 4, process the outer shape and opening.
- polyimide is particularly preferable as the base material 3 of the copper clad laminate 1 and the base material 5 of the coverlay 4.
- Polyimide is obtained by polycondensation of tetraforce rubonic acid dianhydride and diamine compound to give polyamic acid, which is further imidized.
- Polyimide is a polymer material that has extremely high thermal stability, such as an electrical insulating material, a heat-resistant coating film material, and a high-performance printed circuit board material.
- Patent Document 1 JP 2002-316990 A
- Patent Document 2 Japanese Patent Laid-Open No. 2002-256074
- Patent Document 3 Japanese Patent Laid-Open No. 2002-161136
- Patent Document 4 Japanese Patent Laid-Open No. 2003-155342
- Non-Patent Document 1 M. Hasegawa: High Perform. Polym., 13, S93- S 106 (2001
- Non-Patent Document 2 Japan Polyimide Study Group: Latest Polyimides-Fundamentals and Applications- ⁇ 387- ⁇ 407 (20 02)
- Non-Patent Document 1, 2 alicyclic polyamic acid has been very difficult to synthesize, flexible printed circuit boards using alicyclic polyimides have hardly been produced so far (Non-Patent Document 1, 2). (See 2.) The reason is considered as follows.
- the aromatic dianhydride has a pKa of 3 to 5
- the aromatic diamine has a pKa of 3 to 5 as well.
- the nucleophilicity of these is kept good, and both can be copolymerized to synthesize polyamic acid. Further, by heating this, it can be subjected to dehydration cyclization and imidization reaction to synthesize a high molecular weight polyimide.
- the conventional general-purpose polyimide has a high coefficient of thermal expansion of about 2225 ppm / K. Therefore, when a flexible printed circuit board is manufactured using a copper clad laminate and a coverlay using this as a base material, There is a problem in the dimensional stability, and a defect may occur.
- Conventional general-purpose polyimides for example, wholly aromatic polyimides, are difficult to reduce the dielectric constant due to their intramolecular orientation and intermolecular orientation.
- the present invention has been made in view of the above circumstances, and an object of the present invention is to provide a flexible printed board using an alicyclic polyimide having excellent dimensional stability and good transparency.
- the present invention provides a method for producing a copper-clad laminate by laminating a copper foil on a polyimide layer, wherein the polyimide layer comprises an aromatic dianhydride or an alicyclic diacid.
- a method for producing a copper clad laminate produced by imidizing a polyamic acid obtained by reacting an anhydrate, an aliphatic diamine or an alicyclic diamine and an acid having a pKa of 35. provide.
- the present invention provides a method for producing a coverlay by laminating an adhesive layer on a polyimide layer, wherein the polyimide layer comprises an aromatic diacid anhydride or an alicyclic diacid anhydride, and a fatty acid.
- a method for producing a coverlay which is produced by reacting a polyamic acid obtained by reacting an aliphatic diamine or an alicyclic diamine with an acid having a pKa of 3 to 5 with an imidi reaction.
- the present invention is obtained by forming a circuit pattern on a copper foil of a copper clad laminate obtained by the method for producing a copper clad laminate, and then obtaining the cover lay on the copper clad laminate by the method for producing the coverlay.
- a flexible printed circuit board manufacturing method is provided in which a flexible printed circuit board is manufactured by bonding the coverlay through the adhesive layer.
- an aromatic dianhydride or an alicyclic dianhydride and an aliphatic diamine or alicyclic diamine can be copolymerized to a high molecular weight in a short time.
- An alicyclic polyimide having excellent dimensional stability and good transparency can be produced, and a copper-clad laminate, a coverlay and a flexible printed circuit board using the alicyclic polyimide can be provided.
- the use of alicyclic polyimide which has excellent stability and transparency, reduces the defect rate in the production of copper-clad laminates, coverlays and flexible printed circuit boards, and enables early detection of defective products. This makes it possible to improve yields and improve product quality.
- FIG. 1 is a side cross-sectional view illustrating the basic structure of a flexible printed circuit board.
- FIG. 2A is a side cross-sectional view showing an example of a method for producing a flexible printed board of the present invention in the order of steps.
- FIG. 2B is a side cross-sectional view showing an example of the method of manufacturing the flexible printed board of the present invention in the order of steps.
- FIG. 2C is a side cross-sectional view showing an example of the manufacturing method of the flexible printed circuit board of the present invention in the order of steps.
- the dianhydride used in the production method of the present invention is an aromatic dianhydride or an alicyclic dianhydride (Formula 1).
- An aromatic diacid anhydride or alicyclic dianhydride having a pKa of 3 to 5 can be suitably used.
- Examples of the aromatic dianhydride include compounds represented by the following (formula 6), (formula 7), and (formula 8) among the above (formula 1).
- Examples of the alicyclic dianhydride include monocyclic aliphatic diacid anhydrides such as cyclobutanetetracarboxylic dianhydride, polycyclic aliphatic dianhydrides (formula 9), etc. Can be mentioned.
- the repeating unit of the cycloaliphatic structure of the polycyclic aliphatic dianhydride includes two carbon atoms, two identical or different alkylene groups having 2 to 7 carbon atoms, or An alkenylene group (Ci, Ck) and a bond having 0 to 2 carbon atoms, an alkylene group or an alkenylene group (for example, a single bond, a double bond, a methylene group, an ethylene group, an etylene group) (Cj) as a bridging group And a ring system constituted by crosslinking.
- polycyclic aliphatic dianhydrides (formula 9) are bicyclo [2.2.2] otater 7-en 2, 3, 5, 6 tetracarboxylic dianhydride and pentacyclo [8. 2. 1. 14, 702, 9. 03, 8] teradecane-5, 6, 11, 12 tetracarboxylic dianhydride and the like.
- an alicyclic polyamic acid (formula 10) is obtained from a polycyclic aliphatic dianhydride (formula 9) and an aliphatic diamine or cycloaliphatic diamine (formula 2).
- the alicyclic polyamic acid (Formula 10) can be cyclized and subjected to an imidization reaction to synthesize an alicyclic polyimide (Formula 11).
- Y is a cycloaliphatic group
- R is hydrogen or an acrylate group
- Ci and Ck are substituted alkylene groups or alkenylene groups having 2 to 7 carbon atoms
- Cj is carbon A bond of the number 0 to 2
- an alkylene group or an alkenylene group (for example, a single bond, a double bond, a methylene group, an ethylene group, an etylene group)
- p is an integer of 1 to 8
- n is 1 or more It is an integer.
- Examples of the alicyclic diacid anhydride further include spironic acid anhydride (Formula 12).
- Spironic anhydride is: [1SR, 5RS, 6SR] _ 3-Oxabicyclo [3.2.1] Octane 1, 2, 4-dione _ 6-spiro 3'- (tetrahydrofuran 1 ', 5'-dione), [IS, 5R, 6S] —3-oxabicyclo [3.2.1] octane-1,2,4-dione-6-spiro—3'—tetrahydrofuran 2', 5'-dione And [1R, 5S, 6R] —3 oxabicyclone [3.2.1] octane 2,4 dione 6-spiro 3′—tetrahydrofuran 2 ′, 5 ′ dione. These compounds may have optical activity.
- the diamine compound used in the present invention is an aliphatic diamine or an alicyclic diamine (formula 2). Even if a pKa of 10 to 11 is an aliphatic diamine or cycloaliphatic diamine and a pKa of 3 to 5 is reacted with a weak acid, even if a salt is formed, the salt is nucleophilic like an aromatic amine. Nature is retained and can be dissolved in a solvent. Therefore, aromatic dianhydride or alicyclic It can be suitably copolymerized with a dianhydride.
- Examples of the aliphatic diamine include ethylene diamine, propylene diamine, trimethylene diamine, hexamethylene diamine, heptamethylene diamine, otatamethylene diamine, nonamethylene diamine, decamethylene diamine. 1,12-dodecandiamine, 1,18-octadecandiamine, 3-methylheptamethylenediamine, 4,4-dimethylheptamethylenedimethylhexamethylenediamine, 2,5-dimethylheptamethylenediamine 2, 2-dimethylpropylenediamine, N-methyl monobis (3-aminopropyl) amine, 3-methoxyhexamethylenediamine, 1,2-bis (3-aminopropoxy) ethane, bis (3-aminopropyl) sulfide, etc. Can be mentioned.
- Y is a cycloaliphatic group, for example, a cycloalkylene group having 3 to 8 carbon atoms, a cycloalkenylene group having 3 to 8 carbon atoms, or 3 to 3 carbon atoms.
- a cycloalkenylylene group for example, norbornenylene group, decalinylene group, adamantylene group, and cubanylene group of 8 are listed.
- Examples of the alicyclic diamine include diaminocycloalkane, diaminocycloalkene, diaminocycloalkyne, diaminonorbornene, diaminodecalin, diaminoadamantane, and diaminocubane.
- diaminocycloalkane diaminocycloalkene, diaminocycloalkyne, diaminonorbornene, diaminodecalin, diaminoadamantane, and diaminocubane.
- 1,4-cyclohexanediamine, bis (4-aminocyclohexyl) methane, 1,3-diaminoadamantane and the like can be mentioned.
- the acid having Ka of 3 to 5 is preferably an organic acid.
- the acid having a pKa of 3 to 5 used in the production method of the present invention is preferably a low molecular weight acid so that it can be volatilized and removed by heating during the imidation reaction.
- the method for producing a copper-clad laminate of the present invention comprises imidolating the polyamic acid obtained by the polyamic acid synthesis method described above to form a sheet-like or film-like polyimide (polyimide layer).
- a copper clad laminate is obtained by laminating a copper foil on the layer.
- a force barlay is obtained by laminating an adhesive layer on the polyimide layer.
- the copper-clad laminate and the coverlay after the circuit pattern is formed are bonded together to obtain a flexible printed board.
- the conditions for the imidization reaction of the polyamic acid can be performed, for example, by heating to 260 ° C. to 400 ° C. under reduced pressure.
- a method for producing a sheet-like or film-like polyimide layer by imidization reaction of polyamic acid any of various conventionally known polyimide sheet and polyimide film production methods can be applied.
- the step of laminating a copper foil on the polyimide layer includes a method in which the copper foil is superimposed on the polyimide layer and directly heated and pressed, and the polyimide layer and the copper foil are combined.
- a method of laminating via an appropriate thermosetting adhesive and heat-pressing to bond, or a polyamic acid solution is applied to a copper foil to an appropriate thickness and then 260 ° C to 400 ° C under reduced pressure.
- a method of laminating a polyimide layer and a copper foil by heating to C can be used.
- the step of laminating the adhesive layer of the polyimide layer is performed by applying a thermosetting adhesive to the polyimide layer in the same manner as the normal coverlay manufacturing method.
- a thermosetting adhesive examples include various commercially available thermosetting adhesives and adhesive sheets conventionally known in the field of flexible printed circuit board production. It can be selected and used as appropriate.
- the carrier film is peelably adhered to the surface of the coverlay opposite to the adhesive layer.
- the material of the plastic film used as the base material for the carrier film is not particularly limited.
- the copper clad laminate having an alicyclic polyimide layer obtained by the method for producing a copper clad laminate of the present invention and the production of the force barley of the present invention.
- a flexible printed circuit board is manufactured using the coverlay having an alicyclic polyimide layer obtained by the method.
- FIG. 2A to FIG. 2C are side cross-sectional views showing an example of the method for producing a flexible printed board of the present invention in the order of steps.
- 11 is a copper-clad laminate
- 12 is a copper foil (circuit pattern)
- 13 is a polyimide layer of a copper-clad laminate
- 14 is a coverlay
- 15 is a polyimide layer of a coverlay
- 16 is An adhesive layer
- 17 is a release film
- 18 is a window opening portion (outer diameter / opening)
- 20 is a flexible printed circuit board.
- the copper clad laminate 11 having the alicyclic polyimide layer 13 obtained by the method for producing a copper clad laminate of the present invention, and the cover lay production method of the present invention were obtained.
- the coverlay 14 having the alicyclic polyimide layer 15 first, the copper foil 12 of the copper-clad laminate 11, a copper foil other than the required circuit pattern using an appropriate method such as copper etching The circuit pattern is formed by removing the part.
- FIG. 2A after preparing a copper clad laminate 11 having a circuit pattern and a coverlay 14, as shown in FIG. 2B, the coverlay 14 is attached to the coverlay 14 with a release film 17 attached.
- the window opening part 18 is formed by applying heat.
- the release film 17 of the cover lay 14 is peeled off, and the cover lay 14 is put on the copper clad laminate 11 and bonded together as shown in FIG. 2C.
- the window opening process is performed only by a method of processing the cover lay 14 with the release film 17 attached thereto using a mold or the like before the cover lay 14 is bonded to the copper clad laminate 11. For example, after covering the copper-clad laminate 11 with an unprocessed coverlay 14 in a solid state, a desired portion of the coverlay 14 can be scanned by laser scanning.
- an aromatic dianhydride or alicyclic dianhydride and an aliphatic diamine or alicyclic diamine can be copolymerized to a high molecular weight in a short time.
- An alicyclic polyimide having excellent dimensional stability and good transparency can be produced, and a copper-clad laminate, a coverlay and a flexible printed circuit board using the alicyclic polyimide can be provided.
- the use of alicyclic polyimide which has excellent stability and transparency, reduces the defect rate in the production of copper-clad laminates, coverlays and flexible printed circuit boards, and enables early detection of defective products. This makes it possible to improve yields and improve product quality.
- Polyamic acid was synthesized in the following manner in a 3,3 ′, 4,4, -biphenyltetracarboxylic dianhydride (BPDA) / 1,2-cyclohexandamine (CHDA) / acetic acid system.
- BPDA -biphenyltetracarboxylic dianhydride
- CHDA 1,2-cyclohexandamine
- the obtained polyamic acid DMAC solution was cast and heated to 300 ° C. to obtain an insoluble film. Formation of polyimide was confirmed by IR measurement.
- a polyimide film having a thickness of 25 ⁇ m was prepared and used as an example.
- the dielectric constant was measured by the cavity resonator perturbation method.
- the polyimide films of the examples have lower dielectric constant, thermal expansion coefficient, moisture content, thermal contraction rate, and humidity expansion coefficient than the polyimide films of the comparative examples, and are excellent in shape stability. I understand that.
- a polyamic acid produced by the method described in [Preparation of polyamic acid] was applied to a rolled copper foil having a thickness of 18 / m, which was the same as in the above example, and heated to 350 ° C. under reduced pressure.
- a polyimide layer was formed on the foil to a thickness of 25 ⁇ m to produce a copper clad laminate.
- a polyimide film with a thickness of 25 / m as in the previous example was prepared, a thermosetting epoxy resin (uncured, including solvent) was applied, the solvent was evaporated, and the adhesive layer thickness was 25 ⁇ m. Molded to be m.
- the copper foil of the copper clad laminate (CCL) obtained as described above was removed by an etching method so that a predetermined circuit pattern was obtained. Thereafter, a force burley (laminated with the CU, heated and pressed by a hot press, hardened the thermosetting adhesive layer, and a flexible printed circuit board (FPC) was produced by opening the terminal portion with a window.
- a force burley laminated with the CU, heated and pressed by a hot press, hardened the thermosetting adhesive layer, and a flexible printed circuit board (FPC) was produced by opening the terminal portion with a window.
- the polyimide layer of the copper clad laminate and the coverlay is excellent in transparency and shape stability, it is difficult for defective products to occur in the method of manufacturing the flexible printed circuit board. Good product inspection was easy. Actually, the defective rate when 1000 flexible printed boards were produced was 0.5% or less.
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
- Non-Metallic Protective Coatings For Printed Circuits (AREA)
- Laminated Bodies (AREA)
Abstract
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Priority Applications (1)
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US12/268,786 US20090078368A1 (en) | 2006-05-12 | 2008-11-11 | Method of producing copper-clad laminate, method of producing coverlay, and method of producing flexible printed circuit board |
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JP2006-134403 | 2006-05-12 | ||
JP2006134403A JP2007302832A (ja) | 2006-05-12 | 2006-05-12 | ポリアミド酸の合成方法及びポリイミドの合成方法 |
JP2006-225222 | 2006-08-22 | ||
JP2006225222A JP2008049486A (ja) | 2006-08-22 | 2006-08-22 | 銅張積層板の製造方法、カバーレイの製造方法及びフレキシブルプリント基板の製造方法 |
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US (1) | US20090078368A1 (ja) |
KR (1) | KR20090005094A (ja) |
WO (1) | WO2007132819A1 (ja) |
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KR20140071755A (ko) * | 2012-12-04 | 2014-06-12 | 삼성전기주식회사 | 인쇄회로기판 및 이의 제조방법 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH06192420A (ja) * | 1992-12-25 | 1994-07-12 | P I Zairyo Kenkyusho:Kk | ポリイミド溶液組成物及びその製造方法 |
JP2000212279A (ja) * | 1999-01-28 | 2000-08-02 | Teijin Ltd | 半芳香族ポリイミドの製造方法 |
JP2005001380A (ja) * | 2003-05-09 | 2005-01-06 | Mitsubishi Gas Chem Co Inc | 金属張積層体 |
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US5502143A (en) * | 1992-12-25 | 1996-03-26 | Pi Material Research Laboratory | Process for preparing polyimide resins |
US6794031B2 (en) * | 2001-09-28 | 2004-09-21 | Ube Industries, Ltd. | Cover-lay film and printed circuit board having the same |
ATE496079T1 (de) * | 2003-03-28 | 2011-02-15 | Pi R & D Co Ltd | Vernetztes polyamid, dieses enthaltende zusammensetzung und herstellungsverfahren dafür |
KR101075771B1 (ko) * | 2003-05-09 | 2011-10-24 | 미츠비시 가스 가가쿠 가부시키가이샤 | 금속박 부착형 적층체 |
-
2007
- 2007-05-14 KR KR1020087026411A patent/KR20090005094A/ko not_active Application Discontinuation
- 2007-05-14 WO PCT/JP2007/059891 patent/WO2007132819A1/ja active Application Filing
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2008
- 2008-11-11 US US12/268,786 patent/US20090078368A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06192420A (ja) * | 1992-12-25 | 1994-07-12 | P I Zairyo Kenkyusho:Kk | ポリイミド溶液組成物及びその製造方法 |
JP2000212279A (ja) * | 1999-01-28 | 2000-08-02 | Teijin Ltd | 半芳香族ポリイミドの製造方法 |
JP2005001380A (ja) * | 2003-05-09 | 2005-01-06 | Mitsubishi Gas Chem Co Inc | 金属張積層体 |
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US20090078368A1 (en) | 2009-03-26 |
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