WO2010098485A1 - 配線基板 - Google Patents
配線基板 Download PDFInfo
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- WO2010098485A1 WO2010098485A1 PCT/JP2010/053261 JP2010053261W WO2010098485A1 WO 2010098485 A1 WO2010098485 A1 WO 2010098485A1 JP 2010053261 W JP2010053261 W JP 2010053261W WO 2010098485 A1 WO2010098485 A1 WO 2010098485A1
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- film
- dianhydride
- films
- thin film
- wiring
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
- H05K3/382—Improvement of the adhesion between the insulating substrate and the metal by special treatment of the metal
- H05K3/384—Improvement of the adhesion between the insulating substrate and the metal by special treatment of the metal by plating
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/38—Improvement of the adhesion between the insulating substrate and the metal
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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
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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
- C08G73/1039—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors comprising halogen-containing substituents
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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
- C08G73/1046—Polyimides containing oxygen in the form of ether bonds in the main chain
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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
- C08G73/1046—Polyimides containing oxygen in the form of ether bonds in the main chain
- C08G73/1053—Polyimides containing oxygen in the form of ether bonds in the main chain with oxygen only in the tetracarboxylic moiety
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- 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
- C08G73/1057—Polyimides containing other atoms than carbon, hydrogen, nitrogen or oxygen in the main chain
- C08G73/106—Polyimides containing other atoms than carbon, hydrogen, nitrogen or oxygen in the main chain containing silicon
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- 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
- C08G73/1057—Polyimides containing other atoms than carbon, hydrogen, nitrogen or oxygen in the main chain
- C08G73/1064—Polyimides containing other atoms than carbon, hydrogen, nitrogen or oxygen in the main chain containing sulfur
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L79/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen with or without oxygen or carbon only, not provided for in groups C08L61/00 - C08L77/00
- C08L79/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C08L79/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L83/00—Compositions of macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon only; Compositions of derivatives of such polymers
- C08L83/10—Block- or graft-copolymers containing polysiloxane sequences
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/04—Polycondensates having nitrogen-containing heterocyclic rings in the main chain; Polyhydrazides; Polyamide acids or similar polyimide precursors
- C09D179/08—Polyimides; Polyester-imides; Polyamide-imides; Polyamide acids or similar polyimide precursors
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D183/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing silicon, with or without sulfur, nitrogen, oxygen, or carbon only; Coating compositions based on derivatives of such polymers
- C09D183/10—Block or graft copolymers containing polysiloxane sequences
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/24—Reinforcing the conductive pattern
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/42—Block-or graft-polymers containing polysiloxane sequences
- C08G77/452—Block-or graft-polymers containing polysiloxane sequences containing nitrogen-containing sequences
- C08G77/455—Block-or graft-polymers containing polysiloxane sequences containing nitrogen-containing sequences containing polyamide, polyesteramide or polyimide sequences
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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
- C08G77/00—Macromolecular compounds obtained by reactions forming a linkage containing silicon with or without sulfur, nitrogen, oxygen or carbon in the main chain of the macromolecule
- C08G77/80—Siloxanes having aromatic substituents, e.g. phenyl side groups
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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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/01—Dielectrics
- H05K2201/0137—Materials
- H05K2201/0154—Polyimide
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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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/03—Metal processing
- H05K2203/0361—Stripping a part of an upper metal layer to expose a lower metal layer, e.g. by etching or using a laser
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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
- H05K2203/00—Indexing scheme relating to apparatus or processes for manufacturing printed circuits covered by H05K3/00
- H05K2203/13—Moulding and encapsulation; Deposition techniques; Protective layers
- H05K2203/1377—Protective layers
- H05K2203/1394—Covering open PTHs, e.g. by dry film resist or by metal disc
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0011—Working of insulating substrates or insulating layers
- H05K3/0017—Etching of the substrate by chemical or physical means
- H05K3/0023—Etching of the substrate by chemical or physical means by exposure and development of a photosensitive insulating layer
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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
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/24—Reinforcing the conductive pattern
- H05K3/243—Reinforcing the conductive pattern characterised by selective plating, e.g. for finish plating of pads
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- 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
- H05K3/24—Reinforcing the conductive pattern
- H05K3/244—Finish plating of conductors, especially of copper conductors, e.g. for pads or lands
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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
- 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
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- 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
- H05K3/285—Permanent coating compositions
- H05K3/287—Photosensitive compositions
Definitions
- the present invention relates to a technique for improving resistance to electrolytic plating of a wiring board using a photosensitive polyimide as a protective film, and particularly to a technique for improving resistance between the wiring film and the protective film.
- a gold thin film is formed on a portion serving as a terminal in a copper wiring patterned on a rigid substrate or a flexible substrate.
- reference numeral 110 denotes a wiring board having a base film 111 and copper wiring films 114a and 114b before the gold plating process is performed.
- a through hole 116 is formed in a laminate of the base film 111 and the copper wiring films 114 a and 114 b, and a copper plating film 118 is formed in the through hole 116.
- the copper wiring film 114 a on the front surface side and the copper wiring film film 114 b on the back surface side are connected by a copper plating film 118 in the through hole 116.
- Protective films 121a and 121b are respectively disposed on the surfaces of the copper wiring films 114a and 114b, and a part of the protective films 121a and 121b is removed to expose the copper wiring films 114a and 114b.
- the exposed portion of the copper wiring films 114a and 114b is used as a connection terminal. Therefore, as shown in FIG. 117a and 117b are formed on the surfaces of the copper wiring films 114a and 114b.
- the contact resistance and the connection resistance are lowered.
- the portions where the copper wiring films 114a and 114b are exposed are connected to electrodes, and the voltage is applied by immersing the wiring board 110 in a gold plating solution
- the gold thin films 117a and 114b are formed on the exposed copper wiring films 114a and 114b.
- 117b is formed, and the wiring board 110 immersed in the gold plating solution is formed between the copper wiring films 114a and 114b and the protective films 121a and 121b from the boundary between the exposed portions of the copper wiring films 114a and 114b and the protective films 121a and 121b.
- the plating solution enters the interface.
- the electroless plating method does not cause defects such as discoloration and peeling, but the electrolytic plating method causes a significant penetration of the plating solution, which may cause discoloration and protection. Defects such as film peeling occur.
- the surface of the metal foil that becomes the copper wiring film is applied to the surface of the rust-preventing layer by sputtering, electroplating, or non-metal such as nickel, tin, zinc, chromium, molybdenum, or cobalt.
- a thin film is formed on the metal foil by electroplating, and other types of thin films are listed so that combinations can be appropriately examined according to the resin system used for the insulating resin composition layer.
- a copper plating film 118 for connecting the copper wiring films 114a and 114b on the front and back sides is formed in the through hole (through hole) 116, or the copper wiring film 114a.
- a copper plating film 118 for connecting the copper wiring films 114a and 114b on the front and back sides is formed in the through hole (through hole) 116, or the copper wiring film 114a.
- the organic compound When performing the surface treatment as described above, the organic compound must be dissolved in a large amount of organic solvent, resulting in a large environmental load.
- a metal layer is provided on the surface of the wiring film in order to improve the adhesion.
- a protective film made of photosensitive polyimide and a protective film made of photosensitive polyimide between Cu and photosensitive polyimide are provided.
- the peel strength is the same between -Zn, and even when the peel strength is enhanced by the metal layer, the electrolytic plating failure cannot be overcome. That is, even if the peel strength is increased, the effect of improving the resistance to electrolytic plating is not seen.
- a heterocyclic compound having two or more thiol groups increases the adhesion to copper, but it takes a lot of labor to determine the resin composition containing the compound.
- the present invention was created in order to solve the above-described disadvantages of the prior art, and its purpose is to provide a technique for easily enhancing the adhesion between the wiring film and the protective film and improving the plating resistance. There is.
- the present invention has been created to solve the above problems, and includes a substrate, a metal wiring film that is disposed on the substrate and patterned, and a polyimide resin that is disposed in close contact with the metal wiring film.
- a removal portion formed by partially removing the protection film is formed at a position on the metal wiring film of the protection film, and the metal wiring film is formed on a bottom surface of the removal portion.
- this invention is a wiring board by which the gold plating thin film was provided in the surface of the said exposed part of the said metal wiring film.
- the wiring film has a patterned copper thin film, and the zinc thin film is a wiring substrate formed on the copper thin film.
- the protective film has the following formula (1),
- the zinc thin film may be a monomolecular film (0.15 nm) or more. Desirably, it is about 2 nm to 5 nm.
- the magnitude of the peel strength is not particularly important, as long as it is a minimum as a protective film. That is, it is sufficient that the adhesiveness is about the cross-cut test OK.
- FIG. 2 (e) is an example of the wiring board 5 of the present invention, which has a base film 10 made of resin and having flexibility.
- a plurality of elongated metal thin films 11a and 11b each having a desired position are arranged on the front and back surfaces of the base film 10, respectively.
- a through hole 19 is formed in the base film 10 and the metal thin films 11 a and 11 b, and a metal connection film 13 is disposed on the inner peripheral surface of the through hole 19.
- the metal thin films 11a and 11b are electrically connected.
- the base film is a polyimide film
- the metal thin films 11a and 11b are patterned copper thin films.
- the metal thin films 11a and 11b are patterned in a predetermined pattern, on which protective films 17a and 17b are arranged, and the metal thin films 11a and 11b are surrounded by the protective films 17a and 17b on their surfaces and side surfaces.
- the protective films 17a and 17b are partially removed to form terminal portions 20a and 20b in which the metal thin films 11a and 11b protrude from the protective films 17a and 17b.
- the metal thin films 11a and 11b located in the terminal portions 20a and 20b are connected terminals 21a and 21b so that external wiring and external terminals can be electrically connected.
- the zinc thin film 15 shown in b) is formed.
- the zinc thin film 15a is interposed between the metal thin films 11a and 11b having the connection terminals 21a and 21b and the protective films 17a and 17b. 15b and the zinc thin films 15a and 15b are in contact with the protective films 17a and 17b.
- the zinc thin films 15a and 15b are formed from the positions immediately below the protective films 17a and 17b on the metal thin films 11a and 11b to the upper portions of the connection terminals 21a and 21b.
- Gold-plated thin films (Au thin films) 18a and 18b are formed on the zinc thin films 15a and 15b of the connection terminals 21a and 21b.
- the wiring board 5 is connected to the terminals of the electrical equipment on the gold-plated thin films 18a and 18b by (lead-free) solder, anisotropic conductive film or the like. It can also be connected as a connector terminal.
- the base film 10 in this example may be flexible or a rigid substrate.
- the protective films 17a and 17b of the wiring board 5 of the present invention are made of polyimide and have high adhesion to the zinc thin films 15a and 15b.
- Gold plated thin films 18a and 18b are provided between the zinc thin film 15 and the protective films 17a and 17b. The plating solution at the time of forming does not enter, and no defective product is produced when the wiring board 5 is manufactured.
- Reference numeral 1 in FIG. 1A indicates a laminated substrate used for manufacturing the wiring substrate 5 of the present invention.
- the laminated substrate 1 is made of a resin and has a flexible base film 10.
- Metal thin films 11a and 11b are respectively formed on the front and back surfaces of the base film 10, and rust preventive films 12a and 12b are respectively disposed on the surfaces of the metal thin films 11a and 11b.
- the rust preventive films 12a and 12b may be zinc thin films.
- a through hole 19 is formed by drilling, punching or the like at the position where the metal thin films 11a and 11b of the multilayer substrate 1 are arranged (FIG. 1 (b)), and then the inner peripheral surface of the through hole 19 by plating. Then, a metal is deposited and grown to form a metal connection thin film 13 (FIG. 2C), and the front surface metal thin film 11a and the back surface metal thin film 11b are connected by the connection thin film 13.
- This connection thin film 13 is formed not only on the inner peripheral surface of the through-hole 19 but also on the surfaces of the rust prevention films 12a and 12b.
- the metal thin films 11a and 11b and the rust prevention films 12a and 12b are formed on the front side and the back side of the base film 10.
- the connection thin film 13 is laminated.
- connection thin film 13 is exposed on the surface of the multilayer substrate 1, and a copper etching photosensitive resin film is pasted on the surface of the connection thin film 13 on the front surface side and the back surface side of the multilayer substrate 1, and the pattern is overlapped.
- the light is irradiated to the desired position of the photosensitive resin film for copper etching by the light which arrange
- the photosensitive resin film for copper etching has photoreactivity, and the photosensitive resin film for copper etching in the portion irradiated with light chemically changes so as to be soluble in the developer, and after washing with the developer, When the remaining photosensitive resin film for etching copper is heated and cured, resist films 14a and 14b are formed (FIG. 4D).
- the region to be left is covered with the resist films 14a, 14b via the rust preventive films 12a, 12b and the connection thin film 13, and is removed from the metal thin films 11a, 11b.
- the power portions are located below the resists 14a and 14b where the resists 14a and 14b are removed.
- the connection thin film 13 on the metal thin films 11a and 11b is exposed at the bottom of the removed portion.
- this laminated substrate 1 When this laminated substrate 1 is immersed in an etching solution, the portions not covered with the resist films 14a and 14b are etched in the order of the connection thin film 13, the rust prevention films 12a and 12b, and the metal thin films 11a and 11b. 10 is exposed. In the portions covered with the resist films 14a and 14b, the metal films 11a and 11b, the rust preventive films 12a and 12b, and the connection thin film 13 remain (FIG. 5E).
- connection thin film 13 is exposed (FIG. 5F).
- the surface of the connection thin film 13 is not clean. Even if a protective film is formed, the surface of the connection thin film 13 is peeled off. Even if it is clean, a gold plating solution described later enters between the connection thin film 13 and the protective film. End up.
- connection thin film 13 and the rust preventive films 12a and 12b on the metal thin films 11a and 11b are removed by chemical / mechanical polishing to expose the surfaces of the clean metal thin films 11a and 11b (FIG. )). Since the connection thin film 13 and the rust prevention films 12a and 12b are thin, they cannot be left at this time, and the metal thin films 11a and 11b are also slightly etched to expose the surface.
- the portions to become the terminal portions 21a and 21b in FIG. 2 (e) are connected to the electrodes of the plating apparatus, immersed in a zinc plating solution, and a voltage is applied to the metal thin films 11a and 11b having the terminal portions 21a and 21b. Then, a zinc thin film 15 which is a galvanized layer is formed on the surface ((b) of the figure).
- the protective film raw material liquid having photoreactivity on the front surface and the back surface of the laminated substrate 1 on which the zinc thin film 15 is formed (this protective film raw material liquid is prepared according to ⁇ Preparation example of protective film raw material liquid> described later).
- the protective film photosensitive resin layers 16a and 16b are respectively disposed on the front surface and the back surface of the laminated substrate 1 (FIG. 3C).
- the protective film photoreactive resin film having adhesiveness formed from the protective film raw material liquid may be applied to the front and back surfaces of the laminated substrate 1 on which the zinc thin film 15 is formed. Good.
- Reference numerals 16a and 16b in FIG. 2C indicate the photoreactive resin layers for the protective film.
- a photomask is disposed on the photosensitive resin layers 16a and 16b for the protective film, and the laminated substrate 1 is irradiated with light through the photomask and is incident on a desired position.
- the protective film photosensitive resin layers 16a and 16b used here change their properties to be alkali-soluble when exposed to light (exposure), and the portions irradiated with light are removed by washing with an alkaline detergent, The part that was not irradiated remains (development). Next, when fired, the remaining portions of the protective film photosensitive resin layers 16a and 16b are cured to obtain the protective films 17a and 17b (FIG. 4D).
- the zinc thin film 15 (or the metal thin films 11a and 11b) is exposed at the portion where the photosensitive resin layers 16a and 16b for protective film are removed, and this exposed portion.
- the metal thin films 11a and 11b positioned in the terminal portions 20a and 20b and the terminal portions 20a and 20b, respectively, and the connection terminals 21a and 21b are connected to the electrodes of the plating apparatus.
- connection terminals 21a and 21b of the metal thin films 11a and 11b to which the voltage is applied portions protruding from the protective films 17a and 17b
- Gold-plated thin films 18a and 18b are formed on the surface of the zinc thin film 15 (FIG. 2E).
- the liquid tightness between the protective films 17a and 17b and the zinc thin film 15 is high, and the gold plating solution does not enter.
- the terminal portions 20a and 20b are formed with a wiring film in which three layers of the metal thin films 11a and 11b, the zinc thin film 15 and the gold plating thin films 18a and 18b are laminated, and the protective film 17a, Below 17b, a wiring film made of copper wirings 11a and 11b and a wiring film made of copper wirings 11a and 11b and a zinc thin film 15 on the surface thereof are formed.
- the zinc thin film 15 is formed after removing the connection film 13 and the rust preventive films 12a and 12b except that the connection film 13 remains in the through hole 19 by chemical / mechanical polishing. It is possible to form a zinc thin film that comes into contact with the protective films 17a and 17b in other processes.
- the metal thin films 11a and 11b in FIG. 1A are formed on the entire surface of the base film 10, and the rust preventive films 12a and 12b are formed on the entire surfaces of the metal thin films 11a and 11b.
- the rust preventive films 12a and 12b made of a zinc thin film are formed thick, and the connection film 13 is formed at least thinner than the rust preventive films 12a and 12b.
- the laminated film in which the metal thin films 11a and 11b, the rust preventive films 12a and 12b, and the connection film 13 are laminated is etched as shown in FIG. 1F until the resist films 14a and 14b are removed. Thereafter, as shown in FIG. 3A, chemical / mechanical polishing is performed so as to leave the rust preventive films 12a and 12b, the connection film 13 is removed, and the rust preventive films 12a and 12b are exposed.
- the protective film raw material liquid described above is applied to the surface of the laminated substrate 1 on which the rust preventive films 12a and 12b are formed and dried to form the protective film photosensitive resin layers 16a and 16b, or is formed from the protective film raw material liquid
- the protective film photosensitive resin layers 16a and 16b having adhesive properties are pasted on the surface of the laminated substrate 1 on which the rust preventive films 12a and 12b are formed (FIG. 3B), and the protective film photosensitive resin layer 16a is applied.
- 16b is exposed and developed, patterned, and baked to form protective films 17a and 17b, and then immersed in a gold plating solution to be exposed to portions protruding from the protective films 17a and 17b.
- Gold plated thin films 18a and 18b are formed on the surface by electrolytic plating ((c) in the figure).
- the protective films 17a and 17b and the rust preventive films 12a and 12b which are zinc thin films are in close contact with each other.
- connection film 13 As shown in FIG. 1C, a zinc thin film 23 is further formed on the surface of the connection film 13 as shown in FIG. 4A, and then the metal thin film 11a. 11b, the rust preventive films 12a and 12b, the connection film 13 and the zinc thin film 23 are patterned (FIG. 5 (b)), and using the protective film raw material liquid as in the above two examples, After forming the protective film photosensitive resin layers 16a and 16b in close contact with the surface of the thin film 23 (FIG.
- Gold-plated thin films 18a and 18b are formed by electrolytic plating on the surface of the zinc thin film 23 exposed at portions protruding from 17a and 17b (FIG. 4D).
- the metal thin films 11a, 11b protruding from the protective film are zinc thin films 15, 12a, 12b, from the portions covered with the protective films 17a, 17b to the exposed portions. 23, the interface between the protective films 16a and 16b having high adhesion and the zinc thin films 15, 12a and 12b is exposed to the plating solution, so that the plating solution does not enter the lower layer of the protective films 16a and 16b. ing.
- the protective film raw material liquid used for the wiring board of each of the above examples is a protective film raw material liquid containing a polyimide resin component, a photosensitive agent, a crosslinking agent, and a solvent
- the polyimide resin component is A diamine component containing an amide group-containing siloxane diamine compound represented by the formula (1) described later, pyromellitic tetracarboxylic dianhydride, 3,3 ′, 4,4′-benzophenone tetracarboxylic dianhydride, 3 , 3'4,4'-diphenyl ether tetracarboxylic dianhydride, 3,3 ', 4,4'-diphenylsulfone tetracarboxylic dianhydride, 2,2'-bis (3,4-dicarboxyphenyl) Propanoic dianhydride, 1,4,5,8-naphthalenetetracarboxylic dianhydride, 4,4 ′-(hexafluoroisopropylid
- the photosensitive agent of the raw material solution for protective film used in the present invention can be contained in a range of 5 parts by mass or more and 30 parts by mass or less with respect to 100 parts by mass of the polyimide resin.
- the present invention can also contain a blocked isocyanate compound.
- a blocked isocyanate compound is a structure in which an isocyanate group of polyisocyanate (isocyanate group having two or more isocyanate groups) is masked with a blocking agent (“isocyanate group is blocked with a blocking agent”).
- a blocking agent for example, H is bonded to N in the isocyanate group, and each substituent is bonded to C via O.), and if the temperature is lower than the temperature at which the blocking agent dissociates, hydroxyl or carboxyl It does not react even when mixed with a resin component having a group. Since the temperature at which the blocking agent dissociates is usually 80 to 200 ° C., it does not react at room temperature and can be stored for a long time.
- the blocking agent examples include alcohols, phenols, lactams, oximes, acetoacetic acid alkyl esters, malonic acid alkyl esters, phthalimides, imidazoles, hydrogen chloride, hydrogen cyanide, or sodium bisulfite. Yes.
- the blocked isocyanate compound When the blocked isocyanate compound is contained, it can be contained in the range of 2 parts by mass or more and 10 parts by mass or less when the polyimide resin is 100 parts by mass.
- the blocked isocyanate compound When the blocked isocyanate compound is heated to a dissociation temperature, the active isocyanate group is regenerated and reacts with a resin component having a hydroxyl group or a carboxyl group to obtain a tough resin.
- thermosetting resin having a high polarity has a high adhesiveness, and therefore, an epoxy resin, an acrylic resin, and a urethane resin are contained.
- a polar group such as OH, SH, NH, etc.
- N ⁇ S atoms for bonding with Cu From HASB rule.
- Block isocyanate can also be mix
- the resin component After curing of the protective film, when the resin is heated and thermally cured, the resin component is cross-linked by reacting with the hydroxyl group or carboxyl group contained in the resin component, and the cured resin is cross-linked by light.
- a tough protective film can be obtained.
- adhesion to metal By containing a blocked isocyanate compound, adhesion to metal can be improved. This is activated at the time of thermal curing at about 150 ° C., and it is considered that the cross-linking density of the main chain polyimide is increased and the adhesion with the base material is caused by the resulting urethane skeleton. A structure is formed, and the NH group of the generated urethane skeleton is easily bonded to a metal, and adhesion is improved.
- blocked isocyanate compound When the blocked isocyanate compound is contained, unlike the case where the urethane resin is simply added, both the effect of urethane bonding and the effect of increasing the crosslinking density are obtained by bonding to the main chain PI (polyimide).
- blocked isocyanate is a photosensitive composition cross-linking agent, it is easy to control the reactivity of the cross-linking agent and ensure the storage stability of the adhesive varnish, and induces deterioration of the properties of double-sided copper-clad films and multilayer printed wiring boards. do not do.
- the blocked isocyanate is desirably added in an amount of 2 to 10 parts by mass with respect to 100 parts by mass of the polyimide resin.
- the blocked isocyanate may be liquid or solid.
- the adhesion effect can be obtained even with other types such as TDI / MDI type, but the effective content range is narrow and the HDI type having a wide range is desirable.
- the block portion of the blocked isocyanate has a dissociation temperature range of 80 to 200 ° C. In the present invention, it can be used within this range, but it is desirable that the dissociation temperature is desirably 100 to 180 ° C. Since the raw material liquid coated on the substrate is dried at 80 ° C., a photoreactive film is formed. The isocyanate group is not regenerated at that temperature, and a blocked isocyanate that is regenerated by the isocyanate group may be used when the patterned photoreactive film is thermally cured after development. Since thermosetting is performed by heating at 200 ° C. for 1 hour, the regeneration temperature of the blocked isocyanate needs to be lower than the thermosetting temperature. Therefore, the regeneration temperature is higher than 80 ° C. and lower than 200 ° C. However, since a temperature margin is required, 100 ° C. or higher and 180 ° C. or lower is desirable.
- a resin having a nitrogen substituent that reacts with the polyimide in the protective film and has a strong binding force with the wiring film made of Cu can be mentioned, but as a practical resin, a glycidylamine type epoxy resin / isocyanate Resins and acrylamide resins are known.
- R 1 and R 2 are, for example, trimethylene.
- m is an integer of 1 to 30, and n is preferably an integer of 0 to 20.
- the amide group-containing siloxane diamine compound of the formula (1) is preferably 40 to 90 mol%.
- the diamine component preferably further contains 40 to 90 mol% of a siloxane diamine compound represented by the following formula (2).
- the diamine component further contains 20, 50 mol% of 3,3′-diamino-dihydroxydiphenylsulfone.
- the acid dianhydride is preferably 3,3 ′, 4,4′-diphenylsulfonetetracarboxylic dianhydride.
- the photosensitive agent is preferably contained in the range of about 5 to 30 parts by mass with respect to 100 parts by mass of the polyimide resin.
- the polyimide resin includes a diamine component containing an amide group-containing siloxane diamine compound represented by the following formula (1), pyromellitic tetracarboxylic dianhydride, 3,3 ′, 4 ′, 4-benzophenone tetracarboxylic dianhydride 3,3 ′, 4,4′-diphenyl ether tetracarboxylic dianhydride, 3,3 ′, 4,4′-diphenylsulfone tetracarboxylic dianhydride, 2,2′-bis (3,4 Dicarboxyphenyl) propanoic dianhydride, 1,4,5,8-naphthalenetetracarboxylic dianhydride, 4,4 ′-(hexafluoroisopropylidene) diphthalic dianhydride, 9,9-bis (3 , 4-dicarboxyphenyl) fluorenic dianhydride, 9,9-bis [4- (3,4-dicarboxyphenoxy) phen
- the amide group-containing siloxane diamine compound that is an essential diamine component of the polyimide resin has a chemical structure of the formula (1).
- R 1 and R 2 are each an alkylene group which may be independently substituted. Specific examples thereof include a methylene group, an ethylene group, a trimethylene group, a tetramethylene group, and a pentamethylene group. And hexamethylene group. Examples of the substituent include a lower alkyl group such as a methyl group and an ethyl group, and an aryl group such as a phenyl group. Among these, a trimethylene group is desirable because of the availability of raw materials. R 1 and R 2 are the same and may be different from each other, but it is desirable that they are the same because it is difficult to obtain the raw materials.
- M is an integer from 1 to 30, preferably from 1 to 20, and more preferably from 2 to 20. This is because when m is 0, it is difficult to obtain raw materials, and when m exceeds 30, it is separated without being mixed with the reaction solvent.
- n is an integer of 0 to 20, preferably 1 to 20, more preferably an integer of 1 to 10. This is because when n is 1 or more, a diphenylsiloxane unit excellent in flame retardancy is introduced, the flame retardancy is improved as compared with the case where it is not introduced, and when it exceeds 20, the elasticity is lowered. This is because the contribution becomes small.
- the number average molecular weight of the amide group-containing siloxane diamine compound of the formula (1) varies depending on the number of m and n, but is preferably 500 to 3000, more preferably 1000 to 2000.
- the amide group-containing siloxane diamine compound of the formula (1) has an amide bond at both ends of the molecule, the amide bond is succeeded to the polyimide resin prepared therefrom. For this reason, the adhesiveness with respect to conductor parts, such as copper, of the wiring board of a polyimide resin improves.
- a novel amide group-containing siloxane diamine compound of the formula (1) can be produced according to the following reaction scheme.
- the dinitro compound of the formula (4) is formed by heating and mixing the compound of the formula (2) and the compound of the formula (3) in a solvent such as toluene in the presence of a base such as triethylamine. (See Organic Chemistry, 5th edition, page 283 (Ed. Stanley H. Pine)).
- the nitro group of the dinitro compound of formula (4) is reduced to an amino group.
- the novel amide group containing siloxane diamine compound of Formula (1) is obtained.
- the reduction method is not limited as long as the compound of formula (1) is obtained by converting the nitro group to an amino group.
- the formula (4 ) Is brought into contact with excess hydrogen (see Organic Chemistry, 5th edition, page 642 (Ed. Stanley H. Pine)).
- the electroless plating resistance is deteriorated.
- the total amount of diamine is 100 mol%, it is 0.1 to 20 mol%, more preferably 0.1 to 15 mol%.
- the diamine component can contain the siloxane diamine compound of the above formula (2) in order to reduce warpage.
- the content of the siloxane diamine compound of the formula (2) is too small, the effect of low warpage is not sufficient, and if it is too large, the flame retardancy decreases, so it is preferably 40 to 90 mol%, more preferably 50 to 80 mol%. Mol%.
- the siloxane diamine compound represented by the above formulas (1) and (2) is desirably contained in an amount of 65 mol% or more in a total of 100 mol of the diamine component and the acid anhydride component. "Example” is 65 mol% or less.
- the diamine component includes 3,3′-diamino-4,4′-dihydroxydiphenyl in order to achieve alkali solubility that is the basis for imparting positive photosensitivity.
- Sulfones can be included.
- the alkali solubility cannot be obtained, and if it is too large, the alkali solubility becomes too high. It is ⁇ 50 mol%, more preferably 25 to 45 mol%.
- diamine component in addition to the formula (2) and 3,3′-diamino-4,4′-dihydroxydiphenyl sulfone, it is used as a diamine component of a general polyimide resin as long as the effects of the present invention are not impaired.
- a diamine compound similar to the one described above can be used in combination.
- Examples of the acid dianhydride component constituting the polyimide resin include pyromellitic tetracarboxylic dianhydride, 3,3 ′, 4,4′-benzophenone tetracarboxylic dianhydride, 3,3 ′, 4,4′- Diphenyl ether tetracarboxylic dianhydride, 3,3 ′, 4,4′-diphenylsulfonetetracarboxylic dianhydride, 2,2′-bis (3, 4-dicarboxyphenyl) propanoic dianhydride, 1, 4,5,8-naphthalenetetracarboxylic dianhydride, 4,4 ′-(hexafluoroisopropylidene) diphthalic dianhydride, 9,9-bis (3,4-dicarboxyphenyl) fluorenic dianhydride , 9,9-bis [4- (3,4-dicarboxyphenoxy) phenyl] fluorenic dianhydride, and 1,2,
- an acid dianhydride component in addition to the above-mentioned compounds, an acid dianhydride similar to that used as an acid dianhydride component of a general polyimide resin as long as the effects of the present invention are not impaired (patent No. 3363600, paragraph 0009) can be used in combination.
- the polyimide resin can be produced by imidizing a diamine component containing the amide group-containing siloxane diamine compound of the above formula (1) and an acid dianhydride component.
- the molar ratio of the acid dianhydride component to 1 mol of the diamine component is usually 0.8 to 1.2, preferably 0.9 to 1.1.
- a dicarboxylic acid anhydride or a monoamine compound can be allowed to coexist during imidization (see Japanese Patent No. 3363600, paragraph 0011).
- any of the known imidization conditions can be adopted as appropriate.
- conditions for forming an intermediate such as polyamic acid and then imidizing are also included.
- it can be carried out under known solution imidization conditions, heat imidization conditions, and chemical imidization conditions (development of new polyimides for next-generation electronics and electronic materials and technology for imparting high functionality, Technical Information Association, 2003, P42).
- the preferred embodiment of the polyimide resin described above contains, as an essential component, a polyimide resin in which the repeating unit of the main skeleton is represented by the following structural formula (a). Moreover, it is preferable to further contain the polyimide resin of the following structural formula (b) and structural formula (c).
- the photosensitive resin composition used in the present invention contains the above polyimide resin and a photosensitive agent. By containing this photosensitizer, photosensitivity can be imparted to the formed polyimide composition.
- the photosensitizer examples include a diazonaphthoquinone compound.
- the polyimide composition containing the diazonaphthoquinone compound changes its alkali solubility upon exposure. Before exposure, the solubility in an alkaline aqueous solution is low. On the other hand, after exposure, the molecular structure of the diazonaphthoquinone compound changes to produce ketene, which reacts with an aqueous alkaline solution to produce carboxylic acid. The produced carboxylic acid is further reacted with water and dissolved. Therefore, the solubility in alkaline aqueous solution becomes high by irradiating light.
- a polyimide structure composed of a polyimide having a hydroxyl group interacts with the hydroxyl group and the diazonaphthoquinone compound.
- dissolve in an alkali is protected, and alkali solubility falls.
- the polyimide composition in this state is exposed, the molecular structure of the diazonaphthoquinone compound changes and alkali solubility is exhibited.
- a pattern can be formed by developing with an aqueous alkali solution such as sodium hydroxide or tetramethylammonium hydroxide after exposure to the wiring board.
- an aqueous alkali solution such as sodium hydroxide or tetramethylammonium hydroxide after exposure to the wiring board.
- the diazonaphthoquinone compound as a photosensitizer is not particularly limited as long as it is a compound having a diazonaphthoquinone skeleton, but 2,3,4-trihydroxybenzophenone o-naphthoquinonediazide-4-sulfonic acid ester, 2, Examples include 3,4-trihydroxybenzophenone o-naphthoquinonediazide-5-sulfonic acid ester, 2,3,4-trihydroxybenzophenone o-benzoquinonediazide-4-sulfonic acid ester, and the like.
- the blending amount of the photosensitive agent with respect to 100 parts by mass of the polyimide resin is preferably 5 to 30 parts by mass.
- the photosensitive resin composition can contain a metal deactivator.
- This metal deactivator includes 2,3-bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyl] propionohydrazide (CDA), which is a hydrazide metal deactivator. -10, ADEKA Co., Ltd.), and when used for a wiring board, it is possible to prevent the resin composition of the polyimide composition coming into contact with the metal from being deteriorated.
- CDA 2,3-bis [3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionyl] propionohydrazide
- metal deactivators other than CDA-10 include hydrazide-based decamethylene carboxylic acid disalicyloyl hydrazide, triazole-based 3- (N-salicyloyl) amino-1,2,4-triazole, etc. However, it is not limited to these.
- the photosensitive resin composition can contain a cross-linking agent in order to improve the adhesion between a conductor such as a copper foil and a polyimide resin, and to improve the plating resistance.
- the cross-linking agent reacts with the amide group of the polyimide resin or with the cross-linking agents to form a three-dimensional cross-linked structure.
- a crosslinking agent what is conventionally used for resin for electronic components can be used, and an epoxy type crosslinking agent and an oxazine type crosslinking agent can be mentioned preferably from a reactive point.
- epoxy-based crosslinking agent those showing good compatibility with the polyimide resin are preferable.
- various epoxy monomers, oligomers and polymers for forming an epoxy resin can be used.
- bis-F type Epoxy compounds bis A type epoxy compounds, alicyclic epoxy compounds such as 3,4-epoxycyclohexenylmethyl-3 ′, 4-epoxycyclohexenecarboxylate, sorbitol polyglycidyl ether, polyglycerol polyglycidyl ether, pentaerythritol polyglycidyl Ether, diglycerol polyglycidyl ether, glycerol polyglycidyl ether, polymethylolpropane polyglycidyl ether, resorcinol diglyceryl ether, neopentyl glycol diglycidyl ether Glycidyl ether compounds such as 1,6-hexanediol diglycidyl
- Halogenated flame retardant epoxy compounds such as glycidyl ester, dibromoneopentyl glycol glycidyl ether, cresol novolac epoxy resin, novolac epoxy resin such as phenol novolac epoxy resin, tetraglycidyl diaminodiphenylmethane, tetraglycidyl metaxylenediamine, triglycidyl aminophenol, List glycidylamine compounds such as diglycidylaniline It can be.
- oxazine-based crosslinking agent those originally used as thermosetting monomers that undergo ring-opening polymerization by heat can be used.
- bisphenol F-type benzoxazine for example, 6,6′-1 -Methylidene) bis [3,4-dihydro-3-phenyl-2H-1,3-benzoxazine], etc.
- bisphenol S-type benzoxazine for example, 6,6′-sulfonylbis [3,4-dihydro-3) -Phenyl-2H-1,3-benzoxazine
- bisphenol A-type benzoxazine formula (d)
- phenol novolac-type benzoxazine formula (e)
- q is an arbitrary integer.
- the photosensitive resin composition can contain additives such as a solvent, a filler, and a pigment as necessary.
- the photosensitive resin composition can be prepared by uniformly mixing the above-described polyimide resin, a photosensitive agent, and optionally a metal deactivator, a crosslinking agent, and other additives by a conventional method. it can.
- the photosensitive resin composition can be preferably applied as the polyimide resin of a wiring board having a polyimide resin layer.
- the wiring board configured as described above is also within the range of the present invention.
- a known method can be adopted.
- the dry film resist layer and a cover film layer can be mentioned from the functional surface. It can also be used as an interlayer insulating film, and can also be used as a passivation film for semiconductor chips.
- the organic layer was dried over magnesium sulfate, the toluene solvent was distilled off under reduced pressure while heating, and concentrated under reduced pressure at 60 ° C. for 1 day.
- the obtained ⁇ - (p-nitrobenzoyliminopropyldimethylsiloxy) - ⁇ - (p-nitrobenzoyliminopropyldimethylsilyl) oligo (dimethylsiloxane-co-diphenylsiloxane) (hereinafter, dinitro compound) was obtained in a yield of 235 g (yield). 96%).
- the dinitro product was a pale yellow oil.
- the amine value of the obtained amide group-containing siloxane diamine compound was 69.96 KOH mg / g, and the amino group equivalent was 802 g / mol.
- the amine value was measured using an automatic potentiometric titrator (AT-500, manufactured by Kyoto Electronics Industry).
- the amino group equivalent was calculated by 56.106 / (amine value) ⁇ 1000.
- ⁇ Polyimide resin polymerization example> (Example in which 1 mol% of the novel amide group-containing siloxane diamine compound of the formula (1) is contained in all diamine components) 4460.6 g (3.30 mol) of siloxane diamine compound (X-22-9409, Shin-Etsu Chemical Co., Ltd.) in a 20 liter reaction vessel equipped with a nitrogen inlet tube, a stirrer, and a Dean-Stark trap , 3 ′, 4,4′-diphenylsulfonetetracarboxylic dianhydride (DSDA, Shin Nippon Chemical Co., Ltd., purity 99.70%), 1912.7 g (5.34 mol) and 287 g of ⁇ -butyrolactone were described above.
- DSDA 4,4′-diphenylsulfonetetracarboxylic dianhydride
- a mixed solution of 89.0 g (54.3 mmol, purity 97.10%) of the amide group-containing siloxane diamine compound of formula (1) and 2870 g of triglyme were added, and the mixed solution was stirred. Further, 1100 g of toluene was added, and then the mixture was heated to reflux at 185 ° C. for 2 hours, followed by dehydration under reduced pressure and toluene removal to obtain an acid anhydride-terminated oligoimide solution.
- the resulting acid anhydride-terminated oligoimide solution was cooled to 80 ° C., to which 3431 g of triglyme, 413 g of ⁇ -butyrolactone, 3,3′-diamino-4,4′-dihydroxydiphenyl sulfone (BSDA, Konishi Chemical Industries, Ltd., A dispersion consisting of 537.8 gm (1.92 mol) of the product (purity 99.70%) was added and stirred at 80 ° C. for 2 hours.
- BSDA Konishi Chemical Industries, Ltd.
- the measured solid content of the obtained polyimide was 47.50%.
- the polystyrene conversion molecular weight by GPC gel permeation chromatography
- the actually measured solid content of the obtained polyimide was 47.3%.
- the polystyrene conversion molecular weight by GPC gel permeation chromatography
- a novel polyimide having a group was synthesized.
- the actually measured solid content of the obtained polyimide was 49.50%.
- the polystyrene conversion molecular weight by GPC gel permeation chromatography
- each diamine component and acid anhydride component constituting the polyimide resin are shown in molar ratios of each component when the total diamine component is 100 mol. It was.
- the crosslinking agents are the same in No. 1 and No. 5, and the same in No. 2 and No. 6) are applied to a thickness of 10-15 ⁇ m ⁇ exposure ⁇ alkali development ⁇ 200
- the post-baking was performed at 0 ° C.
- the base material used was No. In 1-3, a copper clad laminate, In No. 4-6, a copper-clad laminate with Zn plating was used.
- each sample obtained was subjected to peel strength measurement, cross-cut test, electroless Ni / Au plating test, electrolytic Ni / Au plating test, electrolytic value Au plating test. Note that the plating test is acceptable when the cover agent floats or discolors within 5 ⁇ m.
- the three types of plating resistance can be obtained not with the peel strength but with or without the Zn plating layer.
- a TEM image of the cross section of the material with and without the Zn layer was obtained and observed, a thin white layer was observed between the Cu layer and the deposition layer (deposition layer for TEM observation) in the sample with the Zn layer.
- EDX suggested the presence of Zn. Therefore, it was found that if there is a thin layer of 5 nm or less, the resistance to electrolytic plating can be improved.
- the pass / fail factor is due to the difference in electrical conductivity between Cu and Zn.
- the electrical conductivity at 0 ° C. (unit: 10 6 Siemens / m) is Cu: 64.5 Zn: 18.1.
- Zn surface-treated sample it is difficult for electricity to flow on the substrate surface. Therefore, it is considered that the electroplating between the protective film and the wiring film does not easily occur and the electroplating resistance is obtained.
- Electroless Au plating can be formed at 0.3-3.0 ⁇ m, Ni / Au plating can be formed at 1 ⁇ m or more for Ni and 0.03 ⁇ m or more for Au.
- the blocked isocyanate compound is also called a blocked isocyanate, a blocked polyisocyanate, or a blocked polyisocyanate.
- the polyisocyanate compound is reacted with a compound having a certain type of active hydrogen (block material or masking agent), It is a cyanate group-blocked compound stabilized at room temperature.
- a blocked isocyanate compound obtained by blocking an isocyanate compound of MDI (4,4'-diphenylmethane diisocyanate) and a blocked isocyanate compound obtained by blocking an isocyanate compound of HDI (hexamethylene diisocyanate) are crosslinking agents.
- the substrate is made of a flexible polyimide film, but it may be a non-flexible resin substrate or a glass fiber-containing hard epoxy substrate.
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Abstract
Description
また、本発明は、前記金属配線膜の前記露出部分の表面には、金メッキ薄膜が設けられた配線基板である。
また、本発明は、前記配線膜はパターニングされた銅薄膜を有し、前記亜鉛薄膜は前記銅薄膜上に形成された配線基板である。
また、本発明は、前記保護膜は、下記式(1)、
また、表面処理をしなくて済むので有機溶剤等の廃液を少なくできる。
本発明では亜鉛薄膜は単分子膜(0.15nm)以上であれば良い。望ましくは2nm~5nm程度である。
剥離強度の大きさは特に重要ではなく、保護膜として最低限度あればいい。つまり碁盤目試験OK程度の密着性があればよい。
11a、11b……金属薄膜
12a、12b、15、23……亜鉛薄膜
13……接続膜
17a、17b……保護膜
18a、18b……金メッキ薄膜
19……貫通孔
図2(e)では、符号15a、15bにて表面と裏面の亜鉛薄膜15を示すと、接続端子21a、21bを有する金属薄膜11a、11bと保護膜17a、17bとの間には亜鉛薄膜15a、15bが位置し、亜鉛薄膜15a、15bが保護膜17a、17bと接触している。
この例のベースフィルム10は可撓性を有していても、堅い基板であってもよい。
図1(a)の符号1は、本発明の配線基板5の製造に用いる積層基板を示している。該積層基板1は、上述したように、樹脂から成り、可撓性を有するベースフィルム10を有している。ベースフィルム10の表面と裏面には、金属薄膜11a、11bがそれぞれ形成されており、この金属薄膜11a、11bの表面には、防錆膜12a、12bがそれぞれ配置されている。防錆膜12a、12bは、亜鉛薄膜の場合がある。
この状態では、接続薄膜13の表面は清浄ではなく、保護膜を形成しても剥離したり、また清浄であっても接続薄膜13と保護膜との間には、後述の金メッキ液が侵入してしまう。
図2(c)の符号16a、16bは、それらの保護膜用光反応性樹脂層を示している。
塗布→80℃10min仮乾燥→平均膜厚10~15μm→露光(1500mJ/cm2)→現像(3%NaOH・40℃、60秒以内)→200℃60分の焼成(ベーク)
である。
前記ブロック剤は、例えば、アルコール類、フェノール類、ラクタム類、オキシム類、アセト酢酸アルキルエステル類、マロン酸アルキルエステル類、フタルイミド類、イミタゾール類、塩化水素、シアン化水素または亜硫酸水素ナトリウムなどが知られている。
その反面、ブロックイソシアネートは、感光性組成物架橋剤として、架橋剤の反応性制御が容易で接着剤ワニスの保存安定性を確保しやすく、両面銅張りフィルム及び多層プリント配線板の特性低下を誘発しない。
ブロックイソシアネートは、液状でも固形状でもよい。
ブロックイソシアネートのポリイソシアネート部に関しては、TDI・MDI型等の他種であっても密着効果が得られるが、有効な含有率範囲が狭く、範囲の広いHDI型が望ましい。
よって、再生温度は80℃よりも高温で、200℃よりも低温であることになるが、温度余裕が必要なことから、100℃以上180℃以下が望ましい。
本発明は、下記式(1)、
mは1~30の整数であり、nは0~20の整数が好ましい。
酸二無水物は、3,3’,4,4’-ジフェニルスルホンテトラカルボン酸二無水物であることが好ましい。
感光剤は、ポリイミド樹脂100質量部に対し、5~30質量部ほどの範囲で含有することが好ましい。
更に、架橋剤を含むことが好ましく、架橋剤には、エポキシ樹脂や、オキサジン樹脂が好ましい。
式(1)~(4)中、R1、R2、m及びnは、式(1)において既に説明した通りであり、Xは塩素、臭素などのハロゲン原子である。式(1)のアミド基含有シロキサンジアミン化合物の製造方法においては、まず、式(2)のジアミン化合物と、式(3)のニトロベンゾイルハライドを求核置換反応させ、式(4)のアミド基含有ジニトロ化合物を形成する。
先ず、上記式(1)を用いたポリイミドの合成方法について説明する。
3450cm-1(νN-H)、3370cm-1(νN-H)、3340cm-1(νN-H)、3222cm-1(νN-H)、1623cm-1(νC=O)、1260cm-1(νCH3)、1000~1100cm-1(νSi-O)
1H-NMR(CDCl3,δ):
-0.2~0.2(m、メチル)、0.4~0.6(m、4H、メチレン)、1、4~1.8(m、4H、メチレン)、3.2~3.5(m、4H、メチレン)、3.9(bs、4H、アミノ基水素)、5.8~6.3(m、2H、アミド基水素)、6.4(m、4H、アミノ基隣接芳香環水素)、7.1~7.7(m、芳香環水素)
(式(1)の新規なアミド基含有シロキサンジアミン化合物を全ジアミン成分中1mol%含有する例)
窒素導入管、撹絆機、及びディーン・スターク・トラップを備えた20リットル反応容器に、シロキサンジアミン化合物(X-22-9409、信越化学工業株式会社)を4460.6g(3.30mol)、3,3’,4,4’-ジフェニルスルホンテトラカルボン酸二無水物(DSDA、新日本理化株式会社、純度99.70%)を1912.7g(5.34mol)、γ-ブチロラクトン287gと、上述した式(1)のアミド基含有シロキサンジアミン化合物89.0g(54.3mmol、純度97.10%)との混合液、及びトリグライム2870gを投入し、その混合液を攪拌した。更に、トルエン1100gを投入した後、混合液を185℃で2時間加熱還流させ、続いて減圧脱水およびトルエン除去を行い、酸無水物末端オリゴイミドの溶液を得た。
(式(1)の新規なアミド基含有シロキサンジアミン化合物を全ジアミン成分中5mol%含有する例)
重合例において、シロキサンジアミン化合物(X-22-9409、信越化学工業株式会社)を4099.8g(3.04mol)、3,3’,4,4’-ジフェニルスルホンテトラカルボン酸二無水物(DSDA、新日本理化株式会社、純度99.70%)を1907.0g(5.32mol)、参考例1で得た新規なアミド基含有シロキサンジアミン化合物を443.7g(270.5mmol、純度97.10%)、3,3’-ジアミノ-4,4’-ジヒドロキシジフェニルスルホン(BSDA、小西化学工業株式会社、純度99.70%)を549.5g(1.96mol)と変更した点以外は重合例1と同様の操作を行い、アミド基を有する新規なポリイミド樹脂を合成した。得られたポリイミドの実測固形分は47.4%であった。また、GPC(ゲル浸透クロマトグラフィー)によるポリスチレン換算分子量は、重量平均分子量として57000であった。
(式(1)の新規なアミド基含有シロキサンジアミン化合物を全ジアミン成分中10mol%含有する例)
重合例において、シロキサンジアミン化合物(X-22-9409、信越化学工業株式会社)を3665.3g(2.72mol)、3,3’,4,4’-ジフェニルスルホンテトラカルボン酸二無水物(DSDA、新日本理化株式会社、純度99.70%)を1895.1g(5.29mol )、参考例1で得た新規なアミド基含有シロキサンジアミン化合物を881.9g(537.7mmol、純度97.10%)、3,3’-ジアミノ-4,4’-ジヒドロキシジフェニルスルホン(BSDA、小西化学工業株式会社、純度99.70%)を557.8g(1.99mol)と変更した点以外は重合例1と同様の操作を行い、アミド基を有する新規なポリイミド樹脂を合成した。得られたポリイミドの実測固形分は47.7%であった。また、GPC(ゲル浸透クロマトグラフィー)によるポリスチレン換算分子量は、重量平均分子量として77000であった。
(式(1)の新規なアミド基含有シロキサンジアミン化合物を含有しない例)
重合例において、シロキサンジアミン化合物(X-22-9409、信越化学工業株式会社)を4550.2g(3.37mol)、3,3’,4,4’-ジフェニルスルホンテトラカルボン酸二無水物(DSDA、新日本理化株式会社、純度99.70%)を1914.5g(5.34mol)、3,3’-ジアミノ-4,4’-ジヒドロキシジフェニルスルホン(BSDA、小西化学工業株式会社、純度99.70%)を535.3g(1.91mol)と変更し、参考例1で得た新規なアミド基含有シロキサンジアミン化合物を加えなかった点以外は重合例1と同様の操作を行い、ポリイミド樹脂を合成した。
(式(1)の新規なアミド基含有シロキサンジアミン化合物を全ジアミン成分中1mol%含有する例)
重合例1において、シロキサンジアミン化合物(X-22-9409、信越化学工業株式会社)を4289.6g(3.18mol)、3,3’,4,4’-ジフェニルスルホンテトラカルボン酸二無水物(DSDA、新日本理化株式会社、純度99.70%)を1988.4g(5.62mol)、参考例1で得た新規なアミド基含有シロキサンジアミン化合物を90.5g(54.8mmol)、3,3’-ジアミノ-4,4’-ジヒドロキシジフェニルスルホン(BSDA、小西化学工業株式会社、純度99.70%)を631.5g(2.25mol)と変更した点以外は同様の操作を行い、アミド基を有する新規なポリイミドを合成した。得られたポリイミドの実測固形分は、49.50%であった。また、GPC(ゲル浸透クロマトグラフィー)によるポリスチレン換算分子量は、重量平均分子量として69000であった。
「ポリイミド樹脂の重合例」で合成したアミド基含有ポリイミド樹脂100質量部に対して、感光剤としてジアゾナフトキノン(4NT-300、東洋合成工業株式会社)と、架橋剤として、オキサジン化合物(6,6’-(1-メチリデン)ビス[3,4-ジヒドロ-3-フェニル-2H-1,3-ベンゾオキサジン])(BF-BXZ、小西化学工業)、レゾール(昭和高分子(株)の「BRL-274」)と、及び他の架橋剤としては無添加(No.4)、エポキシ樹脂(No.1、2、5、6)、又はブロックイソシアネート樹脂(No.3)を添加し、更に、防錆剤CDA-10(株式会社ADEKA)とを、下記表1に記載したNo.1~6に記載したそれぞれの配合量添加し、十分に均一になるまで混合し、保護膜用の感光性樹脂組成物を作成した。
ピール強度について、No.1 は6.7N/cmになった。これに対しNo.2・No.3では強度が向上し、ブロック型ポリイソシアネート樹脂を用いたNo.4では、ピール強度が約4倍の24.8N/cmになった。No.1・5とNo.2・6より、Cu・Zn基材表面によるピール強度差は無い。No.5に対し、若干No.4のピール強度は5.9N/cmに低下した。このNo.4も含め、いずれのサンプルでも碁盤目試験はOKとなった。
Zn層あり・なしの資料の断面のTEM画像を得て観察したところ、Zn層ありの試料では、Cu層・蒸着層間(TEM観察のための蒸着層)に白い薄層が観察された。更に拡大すると約2.5nm程度の層が確認され、EDXよりZnの存在が示唆された。よって、5nm以下の、薄層があれば電解メッキ耐性向上できることが分かった。
Claims (4)
- 基板と、
前記基板上に配置され、パターニングされた金属配線膜と、
前記金属配線膜と密着して配置されたポリイミド樹脂から成る保護膜とを有し、
前記保護膜の前記金属配線膜上の位置には、前記保護膜が部分的に除去された除去部が形成され、前記除去部の底面には前記金属配線膜が露出した露出部分が形成された配線基板であって、
前記露出部分に接続された前記金属配線膜は、少なくとも前記保護膜との間の部分の表面に亜鉛薄膜が設けられ、前記金属配線膜の前記亜鉛薄膜が前記保護膜と密着された配線基板。 - 前記金属配線膜の前記露出部分の表面には、金メッキ薄膜が設けられた請求項1記載の配線基板。
- 前記配線膜はパターニングされた銅薄膜を有し、前記亜鉛薄膜は前記銅薄膜上に形成された請求項1又は請求項2のいずれか1項記載の配線基板。
- 前記保護膜は、下記式(1)、
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JPH0637429A (ja) * | 1992-07-16 | 1994-02-10 | Shin Etsu Chem Co Ltd | フレキシブル印刷配線板の製造方法 |
JP2000156555A (ja) * | 1998-11-20 | 2000-06-06 | Sony Chem Corp | フレキシブル配線板の製造方法 |
JP2002124756A (ja) * | 2000-10-18 | 2002-04-26 | Nitto Denko Corp | 回路基板および回路基板の端子部の接続構造 |
JP2003045917A (ja) * | 2001-08-02 | 2003-02-14 | Hitachi Cable Ltd | 半導体装置用テープキャリアおよびその製造方法 |
JP2003163446A (ja) * | 1998-07-08 | 2003-06-06 | Ibiden Co Ltd | プリント配線板 |
JP2004146846A (ja) * | 2003-12-19 | 2004-05-20 | Sony Chem Corp | フレキシブルプリント配線板 |
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JPH0846357A (ja) * | 1994-07-29 | 1996-02-16 | Hitachi Ltd | セラミック薄膜混成基板の製造方法 |
JP3760731B2 (ja) * | 2000-07-11 | 2006-03-29 | ソニーケミカル株式会社 | バンプ付き配線回路基板及びその製造方法 |
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JPH0637429A (ja) * | 1992-07-16 | 1994-02-10 | Shin Etsu Chem Co Ltd | フレキシブル印刷配線板の製造方法 |
JP2003163446A (ja) * | 1998-07-08 | 2003-06-06 | Ibiden Co Ltd | プリント配線板 |
JP2000156555A (ja) * | 1998-11-20 | 2000-06-06 | Sony Chem Corp | フレキシブル配線板の製造方法 |
JP2002124756A (ja) * | 2000-10-18 | 2002-04-26 | Nitto Denko Corp | 回路基板および回路基板の端子部の接続構造 |
JP2003045917A (ja) * | 2001-08-02 | 2003-02-14 | Hitachi Cable Ltd | 半導体装置用テープキャリアおよびその製造方法 |
JP2004146846A (ja) * | 2003-12-19 | 2004-05-20 | Sony Chem Corp | フレキシブルプリント配線板 |
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