WO2016136897A1 - 銅張積層板の製造方法 - Google Patents
銅張積層板の製造方法 Download PDFInfo
- Publication number
- WO2016136897A1 WO2016136897A1 PCT/JP2016/055673 JP2016055673W WO2016136897A1 WO 2016136897 A1 WO2016136897 A1 WO 2016136897A1 JP 2016055673 W JP2016055673 W JP 2016055673W WO 2016136897 A1 WO2016136897 A1 WO 2016136897A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat
- polyimide
- fusible
- mol
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
-
- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
-
- 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
- B32B15/04—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
- B32B15/088—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 comprising polyamides
-
- 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
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
-
- 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
-
- 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
-
- 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
- B32B2309/00—Parameters for the laminating or treatment process; Apparatus details
- B32B2309/02—Temperature
-
- 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
- B32B2457/00—Electrical equipment
- B32B2457/08—PCBs, i.e. printed circuit boards
Definitions
- the present invention relates to a method for producing a copper clad laminate using a heat-fusible polyimide film.
- Polyimide films are widely used as substrate materials such as flexible printed wiring boards (hereinafter also referred to as “FPC”) and tape automated bonding (hereinafter also referred to as “TAB”).
- FPC flexible printed wiring boards
- TAB tape automated bonding
- examples of a method for bonding a polyimide film and a copper foil include a method using an adhesive such as an epoxy resin or an acrylic resin.
- Patent Documents 1 and 2 disclose a heat-fusible polyimide film in which a heat-fusible polyimide layer is laminated on a heat-resistant polyimide layer, and a method for producing a copper-clad laminate using the same. ing.
- an object of the present invention is to provide a method for producing a copper clad laminate using a heat-fusible polyimide film having excellent heat resistance and excellent adhesion to a metal layer.
- the present invention relates to the following items.
- a method for producing a copper clad laminate having a step of thermocompression bonding by superimposing a copper foil on a heat-fusible polyimide film The heat-fusible polyimide film includes a heat-fusible polyimide layer and a heat-resistant polyimide layer laminated in contact with the heat-fusible polyimide layer,
- the polyimide constituting the heat-fusible polyimide layer is obtained from a tetracarboxylic acid component and a diamine component,
- the tetracarboxylic acid component contains 10 to 30 mol% of 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride, and 70 to 90 mol% of pyromellitic dianhydride,
- the diamine component contains more than 50 mol% of 2,2-bis [4- (4-aminophenoxy) phenyl] propane;
- the heat-sealable polyimide film used in the present invention includes a heat-sealable polyimide layer (hereinafter also simply referred to as “heat-sealable layer”) and a heat-resistant polyimide laminated in contact with the heat-sealable polyimide layer. It is a multilayer polyimide film including a layer (hereinafter also referred to as “core layer”).
- the heat-fusible polyimide film has at least a two-layer structure having at least one heat-fusible layer and at least one core layer.
- the heat-sealable polyimide film may have a three-layer structure in which the same or different heat-seal layers are disposed on each surface of the core layer.
- thermal fusion means that the softening point of the polyimide film surface is less than 350 ° C.
- the softening point is a temperature at which the object is softened suddenly when heated, and the glass transition temperature (Tg) is a softening point for amorphous polyimide, and the melting point is a softening point for crystalline polyimide.
- the heat-fusible polyimide layer (heat-fusible layer) is made of a heat-fusible polyimide obtained from a tetracarboxylic acid component and a diamine component.
- the tetracarboxylic acid component contains at least 80 mol% of 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride and pyromellitic dianhydride in total.
- the tetracarboxylic acid component is more preferably composed of these compounds.
- the content of these components is preferably 10 to 30 mol%, particularly 15 to 25 mol% of 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride in the total tetracarboxylic acid components.
- Pyromellitic dianhydride is preferably 70 to 90 mol%, particularly preferably 75 to 85 mol%.
- the diamine component preferably contains 2,2-bis [4- (4-aminophenoxy) phenyl] propane in an amount exceeding 50 mol% in the total diamine component.
- the content of 2,2-bis [4- (4-aminophenoxy) phenyl] propane in the total diamine component is preferably 70 mol% or more, more preferably 80 mol% or more, most preferably 90 mol% or more and 100%. It is as follows.
- the two tetracarboxylic acid components and other tetracarboxylic acid components can be used in combination.
- examples of other tetracarboxylic acid components used in combination include 3,3 ′, 4,4′-benzophenonetetracarboxylic dianhydride, bis (3,4-dicarboxyphenyl) ether dianhydride, bis (3,4) -Dicarboxyphenyl) sulfide dianhydride, bis (3,4-dicarboxyphenyl) sulfone dianhydride, bis (3,4-dicarboxyphenyl) methane dianhydride, 2,2-bis (3,4- And dicarboxyphenyl) propane dianhydride and 1,4-hydroquinone dibenzoate-3,3 ′, 4,4′-tetracarboxylic dianhydride.
- the tetracarboxylic acid component to be used in combination can be used alone or in combination of two
- 2,2-bis [4- (4-aminophenoxy) phenyl] propane and other diamine components can be used in combination.
- diamine components used in combination include 1,3-bis (4-aminophenoxy) benzene, 1,3-bis (3-aminophenoxy) benzene, 1,4-bis (4-aminophenoxy) benzene, 3 , 3′-diaminobenzophenone, 4,4′-bis (3-aminophenoxy) biphenyl, 4,4′-bis (4-aminophenoxy) biphenyl, bis [4- (3-aminophenoxy) phenyl] ketone, bis [4- (4-aminophenoxy) phenyl] ketone, bis [4- (3-aminophenoxy) phenyl] sulfide, bis [4- (4-aminophenoxy) phenyl] sulfide, bis [4- (3-aminophenoxy) ) Pheny
- the heat-fusible polyimide constituting the heat-fusible layer is non-crystalline, which improves the peel strength between the heat-fusible layer and the heat-resistant polyimide layer, and peels the heat-fusible layer from the copper foil. It is preferable from the viewpoint of improving the strength.
- a thermally fusible polyimide being amorphous means that it has a glass transition temperature but no melting point is observed.
- a method of using a compound having an ether bond as a tetracarboxylic acid component or a diamine component may be employed.
- the glass transition temperature of the heat-fusible polyimide constituting the heat-fusible layer is preferably 250 ° C. to 320 ° C. More preferably, it is 300 degreeC. A method for measuring the glass transition temperature will be described in detail in Examples described later.
- the heat resistant polyimide layer (core layer) is made of a heat resistant polyimide obtained from a tetracarboxylic acid component and a diamine component.
- the heat-resistant polyimide preferably contains more than 50 mol% of 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride as a tetracarboxylic acid component in the total tetracarboxylic acid component.
- the heat-resistant polyimide may contain other tetracarboxylic acid components as tetracarboxylic acid components in addition to 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride.
- the total amount of the other tetracarboxylic acid components is preferably 70 mol% or more, more preferably 80 mol% or more, and more preferably 90 mol% or more in the total tetracarboxylic acid components.
- the heat-resistant polyimide preferably contains p-phenylenediamine as a diamine component in an amount exceeding 50 mol% in the total diamine component.
- the heat-resistant polyimide may contain other diamine components in addition to p-phenylenediamine as a diamine component.
- p-phenylenediamine contains more than 50 mol% in the total diamine component, and is further selected from 4,4′-diaminodiphenyl ether, 3,4′-diaminodiphenyl ether, m-tolidine and 4,4′-diaminobenzanilide. It is preferable to contain at least one diamine component.
- the total amount of the other diamine components is preferably 70 mol% or more, more preferably 80 mol% or more, and more preferably 90 mol% or more in the total diamine components.
- Examples of the combination of a tetracarboxylic acid component and a diamine component that can obtain a heat-resistant polyimide include the following. (1) 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride (hereinafter also referred to as “s-BPDA”), p-phenylenediamine (hereinafter also referred to as “PPD”), and if necessary.
- s-BPDA 4,4′-biphenyltetracarboxylic dianhydride
- PPD p-phenylenediamine
- a combination containing 4,4-diaminodiphenyl ether hereinafter also referred to as “DADE”).
- the PPD / DADE (molar ratio) is preferably 100/0 to 85/15.
- s-BPDA 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride (s-BPDA) and pyromellitic dianhydride (hereinafter also referred to as “PMDA”) and p-phenylenediamine (PPD) And a combination containing 4,4-diaminodiphenyl ether (DADE) if necessary.
- s-BPDA / PMDA is preferably 55/45 to 90/10.
- PPD and DADE are used in combination
- PPD / DADE is preferably 55/45 to 90/10, for example.
- a combination comprising 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride (s-BPDA) and p-phenylenediamine (PPD).
- a fine inorganic or organic filler (hereinafter also referred to as “additive”) can be blended as necessary.
- the inorganic additive include inorganic fillers such as particles or flat shapes. Specifically, for example, particulate titanium dioxide powder, silicon dioxide (silica) powder, magnesium oxide powder, aluminum oxide (alumina) powder, inorganic oxide powder such as zinc oxide powder, particulate silicon nitride powder, titanium nitride Examples thereof include inorganic nitride powder such as powder, inorganic carbide powder such as silicon carbide powder, and inorganic salt powder such as fine-particle calcium carbonate powder, calcium sulfate powder, and barium sulfate powder.
- organic additive examples include polyimide particles and thermosetting resin particles. These additives may be used in combination of two or more. About the usage-amount and shape (size, aspect ratio) of an additive, it is preferable to select according to a use purpose. Moreover, in order to disperse these additives uniformly, a means known per se can be applied.
- the thickness of the heat-sealable polyimide film used in the present invention is not particularly limited, but in the case of a heat-sealable polyimide film having a three-layer structure each having a heat-sealable polyimide layer on both sides of the heat-resistant polyimide layer,
- the thickness of the conductive polyimide layer is preferably 3 to 70 ⁇ m, and more preferably 8 to 50 ⁇ m.
- the thickness of the heat-fusible polyimide layer is preferably 0.5 to 15 ⁇ m, and more preferably 1 to 12.5 ⁇ m.
- the total thickness of the heat-fusible polyimide film is preferably 1 to 30 ⁇ m, and more preferably 2 to 25 ⁇ m.
- the heat-fusible polyimide film used in the present invention is preferably excellent in heat resistance, for example, solder heat resistance is preferably 280 ° C. or higher, particularly 300 ° C. or higher.
- the tear strength of the heat-fusible polyimide film is preferably 1.7 N / mm or more, particularly 1.9 N / mm or more. The solder heat resistance and tear strength measurement methods will be described in the Examples section.
- the heat-fusible polyimide film used in the present invention is a polyimide that gives heat-fusible polyimide on one or both sides of a self-supporting film obtained from a polyimide precursor solution (polyamic acid solution) (a) that gives heat-resistant polyimide. It can be obtained by applying a precursor solution (polyamic acid solution) (b) and imidizing by heating and drying the resulting multilayer self-supporting film.
- the self-supporting film obtained from the polyimide precursor solution (a) that gives heat-resistant polyimide has a tetracarboxylic acid component and a diamine component in substantially equimolar amounts, or one component is slightly more than the other component.
- the polyimide precursor solution (a) obtained by reacting in an organic solvent in excess can be cast on a support, and the cast can be dried by heating.
- the polyimide precursor solution (b) that gives the heat-fusible polyimide also has a tetracarboxylic acid component and a diamine component in substantially equimolar amounts, or one component is slightly excessive with respect to the other component. It can be obtained by reacting in an organic solvent.
- the polyimide precursor solution (b) that gives the heat-fusible polyimide contains 10 to 30 of 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride as a tetracarboxylic acid component in all tetracarboxylic acid components. Containing 70 to 90 mol% of pyromellitic dianhydride, and containing more than 50 mol% of 2,2-bis [4- (4-aminophenoxy) phenyl] propane as the diamine component in the total diamine. Is preferred.
- the polyimide precursor solution (a) that gives the heat-resistant polyimide contains 3,3 ′, 4,4′-biphenyltetracarboxylic dianhydride as a tetracarboxylic acid component in an amount exceeding 50 mol% in the total tetracarboxylic acid components.
- the diamine component contains p-phenylenediamine in an amount of more than 50 mol% in the total diamine.
- the polyimide precursor solution (b) and / or the polyimide precursor solution (a) has a phosphorus stabilizer such as triphenyl phosphite or phosphoric acid for the purpose of limiting the gelation of polyamic acid (polyimide precursor).
- Triphenyl and the like can be added in the range of 0.01 to 1% by mass with respect to the solid content (polymer) concentration during polyamic acid polymerization. From the viewpoint of the surface state of the film and productivity, it is preferable to add a phosphate ester or a salt of a tertiary amine and a phosphate ester to the polyamic acid solution.
- phosphate ester examples include distearyl phosphate ester and monostearyl phosphate ester.
- salts of tertiary amine and phosphate ester include monostearyl phosphate ester triethanolamine salt.
- thermal imidization thermal imidization
- chemical imidization chemical imidization
- a basic organic compound can be added to the polyimide precursor solution (b) and / or the polyimide precursor solution (a) for the purpose of promoting imidization.
- imidazole, 2-methylimidazole, 1,2-dimethylimidazole, 2-phenylimidazole, benzimidazole, isoquinoline, substituted pyridine and the like are preferably 0.05 to 10% by mass with respect to the polyamic acid (polyimide precursor). More preferably, it can be used in a proportion of 0.05 to 5% by mass, particularly preferably 0.1 to 2% by mass.
- imidization of the polyimide precursor is promoted at a relatively low temperature to form a polyimide film, so that these basic organic compounds avoid insufficient imidization. Can be used for purposes.
- Examples of the organic solvent for producing the polyimide precursor solution include N-methyl-2-pyrrolidone, N, N-dimethylacetamide, N, N-diethylacetamide, N, N-dimethylformamide, N, N-diethylformamide.
- Amides such as hexamethylsulfuramide, sulfoxides such as dimethyl sulfoxide and diethyl sulfoxide, and sulfones such as dimethyl sulfone and diethyl sulfone. These solvents may be used alone or in combination.
- the concentration of all monomers in the organic solvent when carrying out the polymerization reaction of the tetracarboxylic acid component and the diamine component can be appropriately selected according to the purpose of use.
- the concentration of all monomers in the organic solvent is preferably 5 to 40% by mass, more preferably 6 to 35% by mass, and 10 to 30%. It is particularly preferable that the content is% by mass.
- a tetracarboxylic acid component and a diamine component are substantially equimolar, or one component (an acid component or a diamine component) ) In a slight excess with respect to the other component, and is preferably reacted at a reaction temperature of 100 ° C. or lower, more preferably 80 ° C. or lower, more preferably 0 to 60 ° C. for about 0.2 to 60 hours.
- a polyimide precursor (polyamic acid) solution can be obtained.
- the solution viscosity of the polyimide precursor solution (a) and the polyimide precursor solution (b) can be appropriately selected depending on the purpose (coating, casting, etc.) to be used.
- the rotational viscosity measured at 30 ° C. is about 30 ° C. from the viewpoint of workability in handling the polyimide precursor solution. It is preferably 100 to 5000 poise, more preferably 500 to 4000 poise, and particularly preferably about 1000 to 3000 poise.
- polyimide precursor is 1 to 100 centipoise from the viewpoint of workability to handle the polyimide precursor solution. It is preferably 3 to 50 centipoise, more preferably 5 to 20 centipoise. Therefore, it is desirable to carry out the polymerization reaction to such an extent that the produced polyamic acid (polyimide precursor) exhibits the above viscosity. Moreover, said organic solvent can be added to the manufactured polyamic acid solution, and solution viscosity can also be adjusted.
- the self-supporting film obtained from the polyimide precursor solution (a) that gives the heat-resistant polyimide can be obtained, for example, by using the polyimide precursor solution (a) as a suitable support (for example, a metal, ceramic, plastic roll, or metal belt). Etc.) to form a film having a uniform thickness, and then heated to 50 to 210 ° C., more preferably 60 to 200 ° C. using a heat source such as hot air or infrared rays. Then, the solvent can be gradually removed and dried until it becomes self-supporting (for example, to the extent that it can be peeled off from the support).
- a suitable support for example, a metal, ceramic, plastic roll, or metal belt.
- Etc. to form a film having a uniform thickness, and then heated to 50 to 210 ° C., more preferably 60 to 200 ° C. using a heat source such as hot air or infrared rays.
- the solvent can be gradually removed and dried until it becomes self-support
- the self-supporting film giving heat-resistant polyimide preferably has a loss on heating in the range of 20 to 40% by mass and an imidation ratio in the range of 8 to 40%. If the heating weight loss and imidization rate are within the above ranges, the mechanical properties of the self-supporting film will be sufficient, and it will be easier to cleanly apply the polyimide precursor solution (b) on the upper surface of the self-supporting film, and imidization will occur. Foaming, cracks, crazes, cracks, cracks, etc. are unlikely to occur in the polyimide film obtained later, and the adhesive strength between the heat-resistant polyimide layer and the heat-fusible polyimide layer is sufficient.
- the loss on heating of the self-supporting film is a value obtained by drying the film to be measured at 400 ° C. for 30 minutes, and calculating from the weight before drying (W 1 ) and the weight after drying (W 2 ) by the following formula. .
- Loss on heating (% by mass) ⁇ (W 1 ⁇ W 2 ) / W 1 ⁇ ⁇ 100
- the imidation ratio of the self-supporting film can be calculated by measuring the IR spectra of the self-supporting film and its full-cure product (polyimide film) by the ATR method and using the ratio of the vibration band peak area.
- an asymmetric stretching vibration band of an imide carbonyl group, a benzene ring skeleton stretching vibration band, or the like can be used.
- imidation rate measurement there is also a method using a Karl Fischer moisture meter described in JP-A-9-316199.
- a polyimide precursor solution (b) that gives heat-fusible polyimide is applied to one side or both sides of the self-supporting film.
- the polyimide precursor solution (b) may be applied to the self-supporting film peeled from the support, or may be applied to the self-supporting film on the support before peeling from the support. Coating is preferably performed uniformly on one or both sides of the self-supporting film with the polyimide precursor solution (b). Therefore, the self-supporting film of the polyimide precursor solution (a) preferably has a surface on which the polyimide precursor solution (b) can be applied uniformly.
- the method for applying the polyimide precursor solution (b) to the self-supporting film obtained from the polyimide precursor solution (a) is not particularly limited.
- gravure coating, spin coating, silk screen, dip Known coating methods such as a coating method, a spray coating method, a bar coating method, a knife coating method, a roll coating method, a blade coating method, and a die coating method can be exemplified.
- the self-supporting film of the polyimide precursor solution (a) coated with the polyimide precursor solution (b) is heated and imidized to obtain a heat-fusible polyimide film.
- the maximum heating temperature of the heat treatment for imidation is preferably 350 ° C. to 600 ° C., more preferably 380 to 520 ° C., more preferably 390 to 500 ° C., and more preferably 400 to 480 ° C.
- the heat treatment for imidization is preferably performed in stages, and is first subjected to primary heat treatment at a temperature of 200 ° C. or higher and lower than 300 ° C. for 1 minute to 60 minutes, and then at a temperature of 300 ° C. or higher and lower than 350 ° C. for 1 minute. Secondary heat treatment for ⁇ 60 minutes, and then preferably at a maximum heating temperature of 350 ° C. to 600 ° C., more preferably 450 to 590 ° C., more preferably 490 to 580 ° C., and even more preferably 500 to 580 ° C. It is desirable to perform a third heat treatment for 30 minutes.
- This heat treatment can be performed using a known apparatus such as a hot air furnace or an infrared heating furnace. Further, this heat treatment is preferably performed by fixing the self-supporting film of the polyimide precursor solution (a) coated with the polyimide precursor solution (b) with a pin tenter, a clip or the like.
- the heat-fusible polyimide film used in the present invention is a dope solution (polyamic acid solution, polyimide precursor) that gives a heat-resistant polyimide layer by a coextrusion-casting film forming method (hereinafter also simply referred to as “coextrusion method”). It can also be produced by a method of laminating, drying, and imidizing a solution that is also referred to as a solution) and a dope solution that gives a heat-fusible polyimide layer.
- this coextrusion method for example, a method described in JP-A-3-180343 (Japanese Patent Publication No. 7-102661) can be used.
- an extrusion molding machine having two or more layers of extrusion dies is used.
- a dope solution for providing a heat-resistant polyimide layer and a dope solution for providing a heat-fusible polyimide layer are cast on a support from the discharge port of the die, thereby forming a laminated thin film.
- the thin film-like body on the said support body is dried, and a multilayer self-supporting film is formed.
- the multilayer self-supporting film is peeled off from the support, and finally the multilayer self-supporting film is heat-treated.
- the dope solution in contact with the support may be either a dope solution that provides a heat-resistant polyimide layer or a dope solution that provides a heat-fusible polyimide layer.
- a dope solution supply port is provided, and a dope solution passage is formed from each supply port toward each manifold, and a flow path at the bottom of the manifold is formed.
- the gap between the lip portions can be adjusted by a lip adjustment bolt.
- the distance between the gaps of the flow path is adjusted by each choke bar.
- Each of the manifolds preferably has a hanger coat type shape.
- the double-layer extrusion die has respective dope supply ports on the left and right sides of the upper portion of the die, and the dope solution passages are immediately joined at the junction where the partition plate is provided.
- a dope solution flow path communicates from the junction to the manifold, and a dope solution passage (lip portion) at the bottom of the manifold communicates with the slit-like discharge port.
- a structure (feed block type double-layer die or single manifold type double-layer die) in which the dope solution is discharged on the support in the form of a groove film from the discharge port may be used. Note that the description in the above-mentioned “manufacturing method by coating method” can be applied as it is to the drying conditions, heating conditions and the like after the continuous extrusion onto the support in the coextrusion-casting film forming method.
- a multilayer extrusion polyimide film can be produced by a molding method similar to the two-layer extrusion molding by using three or more dies for extrusion molding. That is, if a dope liquid that provides a heat-resistant polyimide layer and a dope liquid that provides a heat-fusible polyimide layer are used, a two-layer heat-fusible polyimide film can be obtained.
- the first dope solution for providing a heat-fusible polyimide layer-the dope solution for providing a heat-resistant polyimide layer-the second dope solution for providing a heat-fusible polyimide layer three layers of heat are used.
- a fusible polyimide film can also be obtained.
- the first dope solution and the second dope solution may be the same or different.
- the copper clad laminate is formed by laminating a copper foil on the heat-fusible polyimide layer of the heat-fusible polyimide film. Copper foil may be laminated on both sides of the heat-fusible polyimide film, or copper foil may be laminated only on one side of the heat-fusible polyimide film.
- the heat-fusible polyimide film having a heat-fusible polyimide layer on one side or both sides is used.
- stacking copper foil on both surfaces the said heat-fusible polyimide film which has a heat-fusible polyimide layer on both surfaces is used.
- the copper foil include rolled copper foil and electrolytic copper foil.
- the thickness of the copper foil is not particularly limited, but is preferably 2 to 35 ⁇ m, and particularly preferably 5 to 18 ⁇ m.
- a copper foil with a carrier for example, a copper foil with an aluminum foil carrier can be used.
- the heat-fusible polyimide film on which both sides of the heat-fusible polyimide layer are formed is overlapped with copper foil on both sides, and the heat-fusible polyimide film and the copper foil are subjected to thermocompression bonding.
- a copper-clad laminate in which copper foil is laminated on both sides of the adhesive polyimide film can be obtained.
- a copper foil is laminated on the heat-fusible polyimide layer on one side of the heat-fusible polyimide film having the heat-fusible polyimide layer formed on at least one side to heat the heat-fusible polyimide film and the copper foil.
- the heat-fusible polyimide film and the copper foil are continuously thermocompression bonded under heating with at least a pair of pressure members.
- the temperature of the pressure part is preferably 50 ° C. or higher, more preferably 60 ° C. or higher, and even more preferably 70 ° C. or higher than the glass transition temperature of the heat-fusible polyimide.
- the heating temperature is preferably 420 ° C. or less from the viewpoint of preventing thermal deterioration of the heat-fusible polyimide film and the copper foil.
- the glass transition temperature of the heat-fusible polyimide is preferably 250 ° C. or higher, specifically, it is preferably thermocompression bonded in the temperature range of 300 ° C. or higher and 420 ° C. or lower, 350 ° C. As described above, it is more preferable to perform thermocompression bonding in a temperature range of 420 ° C. or less, and more preferable to perform thermocompression bonding in a temperature range of 360 ° C. or more and 420 ° C. or less.
- the pressure member examples include a pair of crimp metal rolls (the crimp part may be made of metal or ceramic sprayed metal), a double belt press, and a hot press.
- a pressure member that can be thermocompression-bonded and cooled under pressure is preferable, and among them, a hydraulic double belt press is particularly preferable.
- a copper-clad laminate can be easily obtained by roll lamination using a pair of crimped metal rolls.
- the pressure member for example, a metal roll or preferably a double belt press is used, and the heat-fusible polyimide film, the copper foil and the reinforcing material are overlapped and continuously heated.
- a long copper-clad laminate can be produced by pressure bonding.
- the use of such a pressure member means that the heat-fusible polyimide film and the copper foil are used in a rolled state, and are continuously supplied to the pressure member, respectively, and the copper-clad laminate is rolled. It is particularly suitable when obtained by
- the copper clad laminate obtained by the production method of the present invention is obtained by firmly laminating a heat-fusible polyimide film and a copper foil.
- a copper clad laminate having a peel strength measured by the method of JIS C6471 of 0.5 N / mm or more, preferably 0.7 N / mm or more can be obtained.
- peeling state may be peeled off at the interface between the heat-resistant polyimide layer and the heat-fusible polyimide film, or peeled off at the interface between the heat-fusible polyimide layer and the copper foil. Therefore, the peel strength measured by the above-mentioned method is the peel strength at the interface having a weaker adhesive force. The method for measuring the peel strength will be described in the Examples section.
- the copper clad laminate obtained in the present invention has good moldability and can be directly subjected to drilling, bending, drawing, metal wiring formation, and the like. Therefore, the copper clad laminated board obtained by this invention can be used suitably as a raw material of electronic components and electronic devices, such as a printed wiring board, a flexible printed circuit board, and a TAB tape.
- the maximum temperature at which foaming was not confirmed was defined as the solder heat resistance temperature.
- Tear strength The tear strength of the heat-fusible polyimide film was measured by the method of IPC-TM-650 2.4.4.17.1. 4). Chemical resistance test A resist was printed on a part of one side of the obtained copper-clad laminate and immersed in an etching solution at 30 ° C. for 20 to 30 minutes to obtain a laminate in which the copper foil on one side was partially etched. . The obtained laminate was dried at 80 ° C. for 30 minutes. The laminate was immersed in a 10% by mass aqueous sodium hydroxide solution heated to 50 ° C. for 30 minutes, washed with water, and the appearance was confirmed.
- the obtained film was subjected to dynamic viscoelasticity measurement using a TA INSTRUMENTS RSA G2 type dynamic viscoelasticity measuring device under conditions of a heating rate of 10 ° C./min and a frequency of 1 Hz, and the tan ⁇ peak temperature was glass transition It was temperature.
- pyromellitic anhydride (PMDA) and benzophenonetetracarboxylic dianhydride (hereinafter also referred to as “BTDA”) as tetracarboxylic dianhydride components were added, and tetracarboxylic dianhydride component and diamine were added.
- the components were reacted to obtain a polyamic acid solution B having a monomer concentration of 18% by mass and a solution viscosity at 25 ° C. of 1800 poise.
- the molar ratio of BTDA and PMDA was 10:90, and the molar ratio of PPD, DADE and BAPP was 75:10:15.
- Example 1 From the three-layer extrusion die, the polyamic acid solution C (thermal fusion layer) -polyamic acid solution A (core layer) -polyamic acid solution C (thermal fusion layer) is formed on the upper surface of the smooth metal support.
- the polyamic acid solution A and the polyamic acid solution C were extruded and cast into a thin film.
- the thin film casting was continuously dried with hot air at 145 ° C. to form a self-supporting film. After peeling the self-supporting film from the support, it is gradually heated from 200 ° C. to 460 ° C.
- Examples 2 to 5 Comparative Examples 1 to 4
- a heat-sealable polyimide film and a copper-clad laminate were obtained in the same manner as in Example 1 except that the type of polyamic acid was changed to that shown in the table.
- Each evaluation result is shown in Table 1.
- the copper clad laminate produced by the method of each example had higher peel strength than the copper clad laminate produced by the method of the comparative example, and had good solder heat resistance and resistance. It turns out that it is excellent in chemical properties.
- the present invention by heat-pressing a specific heat-fusible polyimide film and a copper foil under specific conditions, the heat resistance is excellent, and the polyimide film and the copper foil are A copper clad laminate having a high peel strength can be obtained.
Landscapes
- Chemical & Material Sciences (AREA)
- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Laminated Bodies (AREA)
Abstract
Description
1. 熱融着性ポリイミドフィルムに銅箔を重ね合わせて熱圧着する工程を有する銅張積層板の製造方法であって、
前記熱融着性ポリイミドフィルムは、熱融着性ポリイミド層と、前記熱融着性ポリイミド層に接して積層された耐熱性ポリイミド層とを含み、
前記熱融着性ポリイミド層を構成するポリイミドは、テトラカルボン酸成分とジアミン成分とから得られ、
前記テトラカルボン酸成分が、3,3’,4,4’-ビフェニルテトラカルボン酸二無水物を10~30モル%含み、且つピロメリット酸二無水物を70~90モル%含み、
前記ジアミン成分が、2,2-ビス[4-(4-アミノフェノキシ)フェニル]プロパンを50モル%超含み、
前記耐熱性ポリイミド層を構成するポリイミドは、テトラカルボン酸成分とジアミン成分とから得られ、
前記テトラカルボン酸成分が、3,3’,4,4’-ビフェニルテトラカルボン酸二無水物を50モル%超含み、
前記ジアミン成分が、p-フェニレンジアミンを50モル%超含み、
前記熱融着性ポリイミド層上に銅箔を重ね合わせて、350℃以上、420℃以下の温度範囲で熱圧着する、銅張積層板の製造方法。
2. JIS C6471の方法で測定した剥離強度が0.5N/mm以上である前記項1に記載の銅張積層板の製造方法。
本発明で用いる熱融着性ポリイミドフィルムは、熱融着性ポリイミド層(以下、単に「熱融着層」とも言う。)と、前記熱融着性ポリイミド層に接して積層された耐熱性ポリイミド層(以下「コア層」とも言う。)とを含む多層のポリイミドフィルムである。熱融着性ポリイミドフィルムは、少なくとも一層の熱融着層および少なくとも一層のコア層を有している、少なくとも二層構造のものである。熱融着性ポリイミドフィルムは、コア層の各面に、同一のまたは異なる熱融着層が配置された三層構造であってもよい。
ここで、「熱融着性」とは、ポリイミドフィルム表面の軟化点が350℃未満であることを言う。軟化点は、対象物が加熱時に急激に軟化する温度であり、非結晶性ポリイミドではガラス転移温度(Tg)が軟化点であり、結晶性ポリイミドでは融点が軟化点である。
熱融着性ポリイミド層(熱融着層)は、テトラカルボン酸成分とジアミン成分とから得られる熱融着性ポリイミドからなる。
前記熱融着性ポリイミドは、テトラカルボン酸成分が、3,3’,4,4’-ビフェニルテトラカルボン酸二無水物とピロメリット酸二無水物とをそれらの合計で80モル%以上含むことが好ましく、特に、テトラカルボン酸成分がこれらの化合物からなることがさらに好ましい。これらの成分の含有割合は、全テトラカルボン酸成分中、3,3’,4,4’-ビフェニルテトラカルボン酸二無水物が10~30モル%、特に15~25モル%であることが好ましく、ピロメリット酸二無水物が70~90モル%、特に75~85モル%であることが好ましい。
また、得られる熱融着性ポリイミドフィルムの耐熱性を向上させる観点から、熱融着層を構成する熱融着性ポリイミドのガラス転移温度は250℃~320℃であることが好ましく、270℃~300℃であることがさらに好ましい。ガラス転移温度の測定方法は、後述する実施例において詳述する。
耐熱性ポリイミド層(コア層)は、テトラカルボン酸成分とジアミン成分とから得られる耐熱性ポリイミドからなる。
前記耐熱性ポリイミドは、テトラカルボン酸成分として、3,3’,4,4’-ビフェニルテトラカルボン酸二無水物を、全テトラカルボン酸成分中50モル%超含むことが好ましい。また、前記耐熱性ポリイミドは、テトラカルボン酸成分として、3,3’,4,4’-ビフェニルテトラカルボン酸二無水物に加えて、それ以外の他のテトラカルボン酸成分を含んでも良い。例えば、3,3’,4,4’-ビフェニルテトラカルボン酸二無水物を50モル%超含み、さらに、ピロメリット酸二無水物および1,4-ヒドロキノンジベンゾエート-3,3’,4,4’-テトラカルボン酸二無水物より選ばれる少なくとも1種の酸成分を含むことが好ましい。当該他のテトラカルボン酸成分の合計量は、全テトラカルボン酸成分中70モル%以上であることが好ましく、80モル%以上であることがさらに好ましく、90モル%以上であることがより好ましい。
(1)3,3’,4,4’-ビフェニルテトラカルボン酸二無水物(以下「s-BPDA」とも言う。)と、p-フェニレンジアミン(以下「PPD」とも言う。)と、必要により4,4-ジアミノジフェニルエーテル(以下「DADE」とも言う。)を含む組み合わせ。この場合、PPD/DADE(モル比)は100/0~85/15であることが好ましい。
(2)3,3’,4,4’-ビフェニルテトラカルボン酸二無水物(s-BPDA)およびピロメリット酸二無水物(以下「PMDA」とも言う。)と、p-フェニレンジアミン(PPD)と、必要により4,4-ジアミノジフェニルエーテル(DADE)を含む組み合わせ。この場合、s-BPDA/PMDAは55/45~90/10であることが好ましい。PPDとDADEを併用する場合、PPD/DADEは、例えば55/45~90/10であることが好ましい。
(3)3,3’,4,4’-ビフェニルテトラカルボン酸二無水物(s-BPDA)と、p-フェニレンジアミン(PPD)からなる組み合わせ。
次に、本発明で用いる熱融着性ポリイミドフィルムの製造方法の一例として、耐熱性ポリイミド層(コア層)の片面または両面に熱融着性ポリイミド層(熱融着層)を有する熱融着性ポリイミドフィルムの製造方法について説明する。
本発明で用いる熱融着性ポリイミドフィルムは、耐熱性ポリイミドを与えるポリイミド前駆体溶液(ポリアミック酸溶液)(a)から得られる自己支持性フィルムの片面または両面に、熱融着性ポリイミドを与えるポリイミド前駆体溶液(ポリアミック酸溶液)(b)を塗工し、得られた多層の自己支持性フィルムを加熱、乾燥してイミド化を行うことにより、得ることができる。
耐熱性ポリイミドを与えるポリイミド前駆体溶液(a)は、テトラカルボン酸成分として、3,3’,4,4’-ビフェニルテトラカルボン酸二無水物を、全テトラカルボン酸成分中、50モル%超含み、前記ジアミン成分として、p-フェニレンジアミンを、全ジアミン中、50モル%超含むことが好ましい。
フィルムの表面状態および生産性の点からは、ポリアミック酸溶液にリン酸エステルや、3級アミンとリン酸エステルとの塩類を添加することが好ましい。これらの添加量は、ポリイミドまたは重合体100質量部に対して0.01~5質量部であることが好ましい。リン酸エステルの具体例としては、ジステアリルリン酸エステルやモノステアリルリン酸エステルなどが挙げられる。また、3級アミンとリン酸エステルとの塩類としては、例えばモノステアリルリン酸エステルトリエタノールアミン塩などが挙げられる。本発明におけるイミド化については、熱によるイミド化(熱イミド化)または化学的なイミド化(化学イミド化)のいずれも適用できる。これらのうち、熱イミド化を好適に適用できる。
自己支持性フィルムの加熱減量とは、測定対象のフィルムを400℃で30分間乾燥し、乾燥前の重量(W1)と乾燥後の重量(W2)とから次式によって求めた値である。
加熱減量(質量%)={(W1-W2)/W1}×100
自己支持性フィルムのイミド化率は、自己支持性フィルムと、そのフルキュア品(ポリイミドフィルム)のIRスペクトルをATR法でそれぞれ測定し、振動帯ピーク面積の比を利用して算出することができる。振動帯ピークとしては、イミドカルボニル基の非対称伸縮振動帯や、ベンゼン環骨格伸縮振動帯などを利用することができる。またイミド化率測定に関し、特開平9-316199号公報に記載のカールフィッシャー水分計を用いる手法もある。
本発明で用いる熱融着性ポリイミドフィルムは、共押出し-流延製膜法(以下単に「共押出法」とも言う。)によって、耐熱性ポリイミド層を与えるドープ液(ポリアミック酸溶液、ポリイミド前駆体溶液とも言う)と、熱融着性ポリイミド層を与えるドープ液とを積層、乾燥、イミド化する方法で製造することもできる。この共押出法は、例えば、特開平3-180343号公報(特公平7-102661号公報)に記載されている方法を用いることができる。
また、各マニホールドの底部(合流点に近い箇所)は、各チョークバーによってその流路の空隙部の間隔が調節される。前記の各マニホールドは、ハンガーコートタイプの形状を有していることが好ましい。また、二層押出成形用ダイスとしては、ダイス上部の左右に各ドープ液の供給口を有し、ドープ液の通路が、仕切り板を備えた合流点で直ちに合流するようになっている。その合流点からマニホールドにドープ液の流路が連通していて、そのマニホールドの底部のドープ液の通路(リップ部)がスリット状の吐出口に連通している。この吐出口からドープ液が溝膜状に支持体上に吐出される構造(フィードブロック型二層ダイスまたはシングルマニホールド型二層ダイス)になっているものであってもよい。なお、共押出し-流延製膜法における支持体上に連続して押し出す操作以降の乾燥条件や加熱条件等の形態については、前記「塗工法による製造方法」の記載内容をそのまま適用できる。
次に、前記熱融着性ポリイミドフィルムを用いた銅張積層板の製造方法について説明する。
銅張積層板は、前記熱融着性ポリイミドフィルムの熱融着性ポリイミド層上に銅箔を積層してなる。熱融着性ポリイミドフィルムの両面に銅箔を積層してもよく、熱融着性ポリイミドフィルムの片面にのみ銅箔を積層してもよい。銅箔を熱融着性ポリイミドフィルムの片面に積層する場合は、片面または両面に熱融着性ポリイミド層を有する前記熱融着性ポリイミドフィルムを用いる。また、銅箔を両面に積層する場合は、両面に熱融着性ポリイミド層を有する前記熱融着性ポリイミドフィルムを用いる。
このような加圧部材を用いることは、熱融着性ポリイミドフィルムおよび銅箔が、ロール巻きの状態で用いられ、加圧部材にそれぞれ連続的に供給され、銅張積層板をロール巻きの状態で得られる場合に、特に好適である。
1.銅張積層板の剥離試験
銅張積層板の剥離強度は、JIS C6471の方法で測定した。
2.半田耐熱性
銅張積層板の片面の一部ともう片面の全面にレジストを印刷し、30℃で20~30分エッチング液に浸漬し、片面の金属層が一部エッチングされ、もう片面は全面に銅箔が残った積層板を得た。得られた積層板を80℃で30分乾燥を行い、85℃-85%RHの環境下で24時間以上調湿した。このサンプルを種々の温度の半田浴へ60秒間フロートし、サンプルの発泡の有無を確認した。発泡が確認されない最高温度を半田耐熱温度とした。
3.引き裂き強度
熱融着性ポリイミドフィルムの引き裂き強度は、IPC-TM-650 2.4.17.1の方法で測定した。
4.耐薬品性試験
得られた銅張積層板の片面の一部にレジストを印刷し、30℃で20~30分エッチング液に浸漬し、片面の銅箔が一部エッチングされた積層板を得た。得られた積層板を80℃で30分乾燥を行った。この積層板を、50℃に加熱された10質量%の水酸化ナトリウム水溶液へ30分間浸漬した後、水洗し、外観の確認を行った。外観に変化がない場合を○とし、ポリイミド層と銅箔との間で剥離が生じている場合や、ポリイミド層にクラックが発生している場合は×とした。
5.熱融着性ポリイミドのガラス転移温度
熱融着性ポリイミドを与えるポリアミック酸溶液をガラス板上へコーターを用いてキャストし、乾燥炉内において120℃で15分間乾燥させて自己支持性フィルムを得た。得られた自己支持性フィルムを四方テンターへ貼り付け、加熱炉内で150℃、200℃、250℃、350℃でそれぞれ2分間保持しながら昇温し、厚み20μmの熱融着性ポリイミドからなる単層のフィルムを得た。
得られたフィルムを、TA INSTRUMENTS社製 RSA G2型 動的粘弾性測定装置を用い、昇温速度10℃/min、周波数1Hzの条件で動的粘弾性測定を行い、tanδのピーク温度をガラス転移温度とした。
攪拌機、窒素導入管を備えた反応容器に、N,N-ジメチルアセトアミド(以下「DMAc」とも言う。) を加え、さらに、パラフェニレンジアミン (PPD) と3,3’,4,4’-ビフェニルテトラカルボン酸二無水物(s-BPDA)とを略等モル反応させ、モノマー濃度が18質量%、25℃における溶液粘度が1500ポイズのポリアミック酸溶液Aを得た。
攪拌機、窒素導入管を備えた反応容器に、DMAcを加え、さらに、ジアミン成分としてPPDと、4,4’-ジアミノジフェニルエーテル(DADE)と、2,2-ビス[4-(4-アミノフェノキシ)フェニル]プロパン(以下「BAPP」とも言う。)とを加えた。続いて、テトラカルボン酸二無水物成分としてのピロメリット酸無水物(PMDA)とベンゾフェノンテトラカルボン酸二無水物(以下「BTDA」とも言う。)を加えて、テトラカルボン酸二無水物成分とジアミン成分とを反応させ、モノマー濃度が18質量%、25℃における溶液粘度が1800ポイズのポリアミック酸溶液Bを得た。BTDAとPMDAのモル比は10:90であり、PPDとDADEとBAPPのモル比75:10:15であった。
攪拌機、窒素導入管を備えた反応容器に、DMAcを加え、さらに、2,2-ビス[4-(4-アミノフェノキシ)フェニル]プロパン(BAPP)を加えた。続いて、s-BPDAとPMDAを加えて、モノマー濃度が18質量%、25℃における溶液粘度が850ポイズのポリアミック酸溶液Cを得た。s-BPDAとPMDAのモル比は10:90であった。
攪拌機、窒素導入管を備えた反応容器に、DMAcを加え、さらに、BAPPを加えた。続いて、s-BPDAとPMDAを加えて、モノマー濃度が18質量%、25℃における溶液粘度が850ポイズのポリアミック酸溶液Dを得た。s-BPDAとPMDAのモル比は20:80であった。
攪拌機、窒素導入管を備えた反応容器に、DMAcを加え、さらに、BAPPを加えた。続いて、s-BPDAとPMDAを加えて、モノマー濃度が18質量%、25℃における溶液粘度が850ポイズのポリアミック酸溶液Eを得た。s-BPDAとPMDAのモル比は22.5:77.5であった。
攪拌機、窒素導入管を備えた反応容器に、DMAcを加え、さらに、BAPPを加えた。続いて、s-BPDAとPMDAを加えて、モノマー濃度が18質量%、25℃における溶液粘度が850ポイズのポリアミック酸溶液Fを得た。s-BPDAとPMDAのモル比は25:75であった。
攪拌機、窒素導入管を備えた反応容器に、DMAcを加え、さらに、BAPPを加えた。続いて、s-BPDAとPMDAを加えて、モノマー濃度が18質量%、25℃における溶液粘度が850ポイズのポリアミック酸溶液Gを得た。s-BPDAとPMDAのモル比は30:70であった。
攪拌機、窒素導入管を備えた反応容器に、DMAcを加え、さらに、BAPPを加えた。続いて、PMDAを加えて、モノマー濃度が18質量%、25℃における溶液粘度が850ポイズのポリアミック酸溶液Hを得た。
攪拌機、窒素導入管を備えた反応容器に、DMAcを加え、さらに、BAPPを加えた。続いて、s-BPDAとPMDAを加えて、モノマー濃度が18質量%、25℃における溶液粘度が850ポイズのポリアミック酸溶液Iを得た。s-BPDAとPMDAのモル比は40:60であった。
攪拌機、窒素導入管を備えた反応容器に、DMAcを加え、さらに、BAPPとPPDを加えた。続いて、s-BPDAを加えて、モノマー濃度が18質量%、25℃における溶液粘度が850ポイズのポリアミック酸溶液Jを得た。BAPPとPPDのモル比は70:30であった。
攪拌機、窒素導入管を備えた反応容器に、DMAcを加え、さらに、BAPPを加えた。続いて、s-BPDAを加えて、モノマー濃度が18質量%、25℃における溶液粘度が850ポイズのポリアミック酸溶液Kを得た。
[実施例1]
三層押出しダイスから、平滑な金属製支持体の上面に、ポリアミック酸溶液C(熱融着層)-ポリアミック酸溶液A(コア層)-ポリアミック酸溶液C(熱融着層)となるように、ポリアミック酸溶液Aとポリアミック酸溶液Cを押し出して流延し、薄膜状にした。薄膜状の流延物を145℃の熱風で連続的に乾燥し、自己支持性フィルムを形成した。自己支持性フィルムを支持体から剥離した後、加熱炉で、200℃から460℃まで徐々に加熱し(最高加熱温度は460℃)、溶媒を除去とイミド化を行い、厚み12.5μm(2つの熱融着層の厚みは、それぞれ2.5μmであり、コア層の厚みは7.5μm)の三層構造の熱融着性ポリイミドフィルムを得た。この熱融着性ポリイミドフィルムの引き裂き強度を表に示す。
次に、得られた熱融着性ポリイミドフィルムの両面に銅箔(三井金属鉱業株式会社製、3EC-M3S-HTE、厚み12μm)を重ね合わせ、温度370℃、余熱5分、プレス圧力3MPa、プレス時間1分で熱圧着することにより、熱融着性ポリイミドフィルムの両面に銅箔が積層された銅張積層体を得た。この銅張積層体の剥離強度、半田耐熱および耐薬品性の各評価を行った。その結果を表に示す。
ポリアミック酸の種類を表に示すものに変えた以外は、実施例1と同様にして熱融着性ポリイミドフィルムおよび銅張積層板を得た。各評価結果を表1に示す。
Claims (2)
- 熱融着性ポリイミドフィルムに銅箔を重ね合わせて熱圧着する工程を有する銅張積層板の製造方法であって、
前記熱融着性ポリイミドフィルムは、熱融着性ポリイミド層と、前記熱融着性ポリイミド層に接して積層された耐熱性ポリイミド層とを含み、
前記熱融着性ポリイミド層を構成するポリイミドは、テトラカルボン酸成分とジアミン成分とから得られ、
前記テトラカルボン酸成分が、3,3’,4,4’-ビフェニルテトラカルボン酸二無水物を10~30モル%含み、且つピロメリット酸二無水物を70~90モル%含み、
前記ジアミン成分が、2,2-ビス[4-(4-アミノフェノキシ)フェニル]プロパンを50モル%超含み、
前記耐熱性ポリイミド層を構成するポリイミドは、テトラカルボン酸成分とジアミン成分とから得られ、
前記テトラカルボン酸成分が、3,3’,4,4’-ビフェニルテトラカルボン酸二無水物を50モル%超含み、
前記ジアミン成分が、p-フェニレンジアミンを50モル%超含み、
前記熱融着性ポリイミド層上に銅箔を重ね合わせて、350℃以上、420℃以下の温度範囲で熱圧着する、銅張積層板の製造方法。 - JIS C6471の方法で測定した剥離強度が0.5N/mm以上である請求項1に記載の銅張積層板の製造方法。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201680011854.7A CN107249877B (zh) | 2015-02-26 | 2016-02-25 | 覆铜层叠板的制造方法 |
| JP2017502478A JP6673329B2 (ja) | 2015-02-26 | 2016-02-25 | 熱融着性ポリイミドフィルム |
| KR1020177023626A KR102039341B1 (ko) | 2015-02-26 | 2016-02-25 | 동장(銅張) 적층판의 제조방법 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015036370 | 2015-02-26 | ||
| JP2015-036370 | 2015-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2016136897A1 true WO2016136897A1 (ja) | 2016-09-01 |
Family
ID=56788985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2016/055673 Ceased WO2016136897A1 (ja) | 2015-02-26 | 2016-02-25 | 銅張積層板の製造方法 |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JP6673329B2 (ja) |
| KR (1) | KR102039341B1 (ja) |
| CN (1) | CN107249877B (ja) |
| TW (1) | TWI672220B (ja) |
| WO (1) | WO2016136897A1 (ja) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018079710A1 (ja) * | 2016-10-31 | 2018-05-03 | 宇部興産株式会社 | 金属積層用ポリイミドフィルム、およびこれを用いたポリイミド金属積層体 |
| WO2018181223A1 (ja) * | 2017-03-28 | 2018-10-04 | デンカ株式会社 | 積層体の製造方法、積層体の製造装置および積層体 |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109618429B (zh) * | 2018-11-27 | 2021-02-02 | 宁波今山电子材料有限公司 | 一种耐温在200-250℃的金属箔发热片的制备方法 |
| KR102268708B1 (ko) * | 2020-09-10 | 2021-06-25 | (주)상아프론테크 | 동박적층판(ccl)용 저유전 복합필름 및 이를 포함하는 저유전 동박적층판(ccl) |
| WO2022098042A1 (ko) | 2020-11-04 | 2022-05-12 | 피아이첨단소재 주식회사 | 높은 치수 안정성을 가지는 폴리이미드 필름 및 그 제조방법 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006255920A (ja) * | 2005-03-15 | 2006-09-28 | Toray Ind Inc | 耐熱性フレキシブル積層板の製造方法および製造装置 |
| JP2011195771A (ja) * | 2010-03-23 | 2011-10-06 | Kaneka Corp | 接着フィルムの製造方法ならびにフレキシブル金属張積層板 |
| WO2013157565A1 (ja) * | 2012-04-19 | 2013-10-24 | 宇部興産株式会社 | 熱融着性ポリイミドフィルム、熱融着性ポリイミドフィルムの製造方法及び熱融着性ポリイミドフィルムを用いたポリイミド金属積層体 |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3482723B2 (ja) * | 1995-02-21 | 2004-01-06 | 宇部興産株式会社 | 多層芳香族ポリイミドフィルム |
| JP4994992B2 (ja) * | 2006-08-10 | 2012-08-08 | 新日鐵化学株式会社 | 配線基板用積層体及びcof用フレキシブル配線基板 |
| CN102712187B (zh) | 2010-01-18 | 2016-03-30 | 株式会社钟化 | 多层聚酰亚胺膜及使用有该多层聚酰亚胺膜的柔性金属箔积层板 |
| KR101907941B1 (ko) * | 2010-12-14 | 2018-10-16 | 가부시키가이샤 가네카 | 3층 공압출 폴리이미드 필름의 제조 방법 |
| CN104057664A (zh) * | 2014-07-09 | 2014-09-24 | 苏州城邦达力材料科技有限公司 | 双面挠性覆铜板及其制作方法 |
-
2016
- 2016-02-25 JP JP2017502478A patent/JP6673329B2/ja active Active
- 2016-02-25 CN CN201680011854.7A patent/CN107249877B/zh active Active
- 2016-02-25 WO PCT/JP2016/055673 patent/WO2016136897A1/ja not_active Ceased
- 2016-02-25 KR KR1020177023626A patent/KR102039341B1/ko active Active
- 2016-02-26 TW TW105105999A patent/TWI672220B/zh active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006255920A (ja) * | 2005-03-15 | 2006-09-28 | Toray Ind Inc | 耐熱性フレキシブル積層板の製造方法および製造装置 |
| JP2011195771A (ja) * | 2010-03-23 | 2011-10-06 | Kaneka Corp | 接着フィルムの製造方法ならびにフレキシブル金属張積層板 |
| WO2013157565A1 (ja) * | 2012-04-19 | 2013-10-24 | 宇部興産株式会社 | 熱融着性ポリイミドフィルム、熱融着性ポリイミドフィルムの製造方法及び熱融着性ポリイミドフィルムを用いたポリイミド金属積層体 |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018079710A1 (ja) * | 2016-10-31 | 2018-05-03 | 宇部興産株式会社 | 金属積層用ポリイミドフィルム、およびこれを用いたポリイミド金属積層体 |
| TWI659830B (zh) * | 2016-10-31 | 2019-05-21 | 日商宇部興產股份有限公司 | 金屬積層用聚醯亞胺膜、及使用其之聚醯亞胺金屬積層體 |
| CN109843588A (zh) * | 2016-10-31 | 2019-06-04 | 宇部兴产株式会社 | 金属层叠用聚酰亚胺膜及使用了其的聚酰亚胺金属层叠体 |
| KR20190078559A (ko) * | 2016-10-31 | 2019-07-04 | 우베 고산 가부시키가이샤 | 금속 적층용 폴리이미드 필름 및 이것을 사용한 폴리이미드 금속 적층체 |
| JPWO2018079710A1 (ja) * | 2016-10-31 | 2019-09-19 | 宇部興産株式会社 | 金属積層用ポリイミドフィルム、およびこれを用いたポリイミド金属積層体 |
| CN109843588B (zh) * | 2016-10-31 | 2021-10-29 | 宇部兴产株式会社 | 金属层叠用聚酰亚胺膜及使用了其的聚酰亚胺金属层叠体 |
| JP6992765B2 (ja) | 2016-10-31 | 2022-01-13 | 宇部興産株式会社 | 金属積層用ポリイミドフィルム、およびこれを用いたポリイミド金属積層体 |
| KR102442540B1 (ko) * | 2016-10-31 | 2022-09-13 | 유비이 가부시키가이샤 | 금속 적층용 폴리이미드 필름 및 이것을 사용한 폴리이미드 금속 적층체 |
| WO2018181223A1 (ja) * | 2017-03-28 | 2018-10-04 | デンカ株式会社 | 積層体の製造方法、積層体の製造装置および積層体 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2016136897A1 (ja) | 2017-12-07 |
| JP6673329B2 (ja) | 2020-03-25 |
| CN107249877A (zh) | 2017-10-13 |
| KR20170122196A (ko) | 2017-11-03 |
| TWI672220B (zh) | 2019-09-21 |
| KR102039341B1 (ko) | 2019-11-01 |
| TW201643041A (zh) | 2016-12-16 |
| CN107249877B (zh) | 2020-02-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103502006B (zh) | 聚酰亚胺膜和使用其的金属层压体 | |
| JP4734837B2 (ja) | 接着性の改良されたポリイミドフィルム、その製造方法および積層体 | |
| CN103282180B (zh) | 三层共挤压式聚酰亚胺膜的制造方法 | |
| KR20120123389A (ko) | 다층 폴리이미드 필름 및 그것을 사용한 플렉서블 금속장 적층판 | |
| JP6743697B2 (ja) | 多層ポリイミドフィルム、多層ポリイミドフィルムの製造方法、それを用いたポリイミド積層体、及びそれらに用いられる共重合ポリイミド | |
| CN101466544A (zh) | 敷金属用聚酰亚胺膜以及金属-层压聚酰亚胺膜 | |
| CN107249877B (zh) | 覆铜层叠板的制造方法 | |
| CN103889710B (zh) | 制备聚酰亚胺金属层压体的方法 | |
| KR101076505B1 (ko) | 접착 필름 및 그의 이용 | |
| JP3938058B2 (ja) | 熱融着性を有するポリイミドフィルム、それを用いた積層板およびそれらの製造法 | |
| WO2013157565A1 (ja) | 熱融着性ポリイミドフィルム、熱融着性ポリイミドフィルムの製造方法及び熱融着性ポリイミドフィルムを用いたポリイミド金属積層体 | |
| JP2015129200A (ja) | 熱融着性ポリイミドフィルム、及びそれを用いたポリイミド金属積層体 | |
| WO2013027663A1 (ja) | 熱融着性ポリイミドフィルム及びその製造方法、熱融着性ポリイミドフィルムを用いたポリイミド金属積層体 | |
| JP5998576B2 (ja) | 熱融着性ポリイミドフィルム、及びそれを用いたポリイミド金属積層体 | |
| JP7715313B1 (ja) | 多層ポリイミドフィルムおよびポリイミド金属積層体 | |
| JP4360025B2 (ja) | 補強材を有するポリイミド片面積層体およびその製造法 | |
| TWI919536B (zh) | 多層聚醯亞胺膜及聚醯亞胺金屬積層體 | |
| KR20160075895A (ko) | 슬립성이 우수한 열가소성 폴리이미드 접착 필름 및 이를 적용한 연성 동박적층판 | |
| JP4821411B2 (ja) | 片面のみに熱融着性を有するポリイミドフィルム、片面銅張り積層板 | |
| JP2007313854A (ja) | 銅張積層板 | |
| JP2015128821A (ja) | 熱融着性ポリイミドフィルム、熱融着性ポリイミドフィルムの製造方法及び熱融着性ポリイミドフィルムを用いたポリイミド金属積層体 | |
| JP5355993B2 (ja) | 接着フィルム | |
| JP2007320083A (ja) | 銅張積層板 | |
| JP2006199871A (ja) | 接着フィルム |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 16755641 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2017502478 Country of ref document: JP Kind code of ref document: A |
|
| ENP | Entry into the national phase |
Ref document number: 20177023626 Country of ref document: KR Kind code of ref document: A |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 16755641 Country of ref document: EP Kind code of ref document: A1 |
