WO2010085113A2 - 신규 연성 금속박 적층판 및 그 제조방법 - Google Patents
신규 연성 금속박 적층판 및 그 제조방법 Download PDFInfo
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- WO2010085113A2 WO2010085113A2 PCT/KR2010/000422 KR2010000422W WO2010085113A2 WO 2010085113 A2 WO2010085113 A2 WO 2010085113A2 KR 2010000422 W KR2010000422 W KR 2010000422W WO 2010085113 A2 WO2010085113 A2 WO 2010085113A2
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- metal foil
- polyimide layer
- polyimide
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- copper foil
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- 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
- B32B15/043—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 metal
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- 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
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0313—Organic insulating material
- H05K1/0353—Organic insulating material consisting of two or more materials, e.g. two or more polymers, polymer + filler, + reinforcement
- H05K1/036—Multilayers with layers of different types
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- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/06—Coating on the layer surface on metal layer
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- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/26—Polymeric coating
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- 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
- B32B2255/00—Coating on the layer surface
- B32B2255/28—Multiple coating on one surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/20—Properties of the layers or laminate having particular electrical or magnetic properties, e.g. piezoelectric
- B32B2307/202—Conductive
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/546—Flexural strength; Flexion stiffness
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/714—Inert, i.e. inert to chemical degradation, corrosion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
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- 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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/03—Use of materials for the substrate
- H05K1/0393—Flexible materials
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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
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/03—Conductive materials
- H05K2201/0332—Structure of the conductor
- H05K2201/0335—Layered conductors or foils
- H05K2201/0358—Resin coated copper [RCC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24942—Structurally defined web or sheet [e.g., overall dimension, etc.] including components having same physical characteristic in differing degree
- Y10T428/2495—Thickness [relative or absolute]
- Y10T428/24967—Absolute thicknesses specified
- Y10T428/24975—No layer or component greater than 5 mils thick
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31511—Of epoxy ether
- Y10T428/31515—As intermediate layer
Definitions
- the present invention relates to a novel flexible double-sided metal foil laminate and a method of manufacturing the same, wherein the flexibility, heat resistance, chemical resistance, flame retardancy, and electrical properties required as flexible copper foil laminates can all be exerted, and the simplicity and economy of the manufacturing process can be achieved. .
- FCCL Flexible Copper Clad Laminated
- the said flexible copper foil laminated board can be largely divided into a two-layer flexible copper foil laminated board using only a polyimide system, and a three-layer flexible copper foil laminated board using an epoxy system. Since the conventional three-layer flexible double-sided copper foil laminated board shown in FIG. 1 is manufactured by apply
- the flexible 2-layer double-sided copper foil laminated board using only polyimide was manufactured and used, using polyimide as an adhesive agent without using an epoxy adhesive. Since these two-layer flexible copper foil laminated plates use only a polyimide type, they have good heat resistance, are excellent in bendability, and are used in many fields requiring bendability. For example, it is widely applied to numerous electronic products such as laptop computers, mobile phones, PDAs, digital cameras, and the like.
- double-sided laminates in which copper foils are bonded to both sides of the two-layer flexible copper foil laminates are increasingly used and used due to the trend of circuit integration and thinning.
- the two-layer double-sided flexible copper foil laminate has a disadvantage that its manufacturing method is very difficult, and the manufacturing process is long and the manufacturing method is very difficult.
- the present inventors have worked hard to solve the above-described problems, the new flexible metal foil laminate and the simplest manufacturing process, while exhibiting the original characteristics of polyimide having excellent flexibility, heat resistance, chemical resistance, flame retardancy, electrical properties and Its manufacturing method could be developed.
- an object of the present invention is to provide a novel flexible double-sided metal foil laminate and a method of manufacturing the same, which gives excellent physical properties, simplicity of manufacturing process, and economics.
- the invention (a) a first conductive metal foil having a first polyimide layer formed on the first surface; And (b) a second conductive metal foil having a second polyimide layer formed on the first surface, wherein the first polyimide layer and the second polyimide layer are bonded to each other by an epoxy adhesive.
- the flexible copper foil laminate includes (i) a first conductive metal foil; (ii) a first polyimide layer; (iii) an epoxy adhesive layer; (iv) a second polyimide layer; (v) 2nd electroconductive metal foil is included, These are laminated
- the thickness of the conductive metal foil is 5 to 40 ⁇ m
- the thickness of the polyimide layer is 2 to 60 ⁇ m
- the thickness of the epoxy adhesive layer is in the range of 2 to 60 ⁇ m.
- the conductive metal foil is characterized in that the copper, tin, gold, silver or a mixture of one or more thereof.
- the polyimide layer is characterized in that the inorganic filler for reducing the coefficient of thermal expansion (CTE) is uniformly or partially distributed throughout the polyimide layer.
- CTE coefficient of thermal expansion
- the manufacturing process is simple and simple, thereby improving productivity and economy.
- FIG. 2 is a cross-sectional view showing the configuration of a flexible metal foil laminate according to an embodiment of the present invention.
- the present invention is intended to give the simplicity and simplicity of the manufacturing process, while maintaining the characteristics of the polyimide intrinsic properties having excellent flexibility, heat resistance, chemical resistance, flame retardancy, electrical properties and the like.
- the first polyimide layer and the second polyimide layer are respectively formed on one surface (eg, the first surface) of the first conductive metal foil and the second conductive metal foil, and the polyimide layers formed on the epoxy adhesive It has a novel structural feature bonded to each other by.
- the flexible metal foil is in contact with the polyimide layer instead of the epoxy adhesive layer, and each of the polyimide layers completely surrounds the epoxy adhesive layer positioned in the center of the final flexible metal foil laminate, thereby compensating for the properties of the epoxy adhesive.
- the excellent intrinsic properties of polyimide can be sufficiently exhibited (see Table 3).
- polyimide-based adhesives were used as adhesives.
- these polyimide-based materials are not only expensive but also require excessive use conditions (eg, high temperature and high pressure). This was difficult to promote.
- an epoxy adhesive it is possible to fundamentally solve the above-described problems, thereby increasing productivity and economy.
- Figure 2 is a cross-sectional view showing the configuration of a flexible metal foil laminate according to an embodiment of the present invention.
- the flexible metal foil laminate comprises: a first conductive metal foil 101a having a first polyimide layer 102a formed on a first surface thereof; And a second conductive metal foil 101b having a second polyimide layer 102b formed on the first surface and formed between the first polyimide layer and the second polyimide layer, such that the epoxy adhesive is bonded to each other. And layer 103.
- the conductive metal foils 101a and 101b are not particularly limited as long as they are metals having conductivity and ductility.
- it may be copper, tin, gold, silver or a mixture of one or more thereof, preferably copper (Cu).
- copper foil it may be a rolled copper foil or an electrolytic copper foil.
- the first conductive metal foil and the second conductive metal foil may be made of different materials, but are preferably made of the same material.
- the thickness of the conductive metal foil is not particularly limited, but is preferably in the range of 5 to 40 ⁇ m, more preferably in the range of 9 to 35 ⁇ m.
- the polyimide layer formed on the conductive metal foil is a conventional polyimide (PI) -based resin known in the art.
- Polyimide (PI) is a high molecular material having an imide ring, and exhibits excellent heat resistance, chemical resistance, abrasion resistance and weather resistance based on the chemical stability of the imide ring, and low thermal expansion coefficient and low breathability. And excellent electrical properties.
- the polyimide is generally synthesized by condensation polymerization of aromatic dianhydride and aromatic diamine (or aromatic diisocyanate), depending on the molecular structure and molding processability of the finally obtained polymer solid, 1 straight chain thermoplastic type, 2 straight chain non-thermoplastic type , 3 can be divided into three embodiments of thermosetting.
- the polyimide is preferably a thermosetting polyimide.
- the first polyimide and the second polyimide may each be made of different materials or the same material.
- the thickness of the polyimide layer is not particularly limited, but is preferably in the range of 2 to 60 ⁇ m, more preferably in the range of 3 to 30 ⁇ m. In this case, the thicknesses of the first polyimide layer and the second polyimide layer may be the same or different.
- the aforementioned polyimide layer may be distributed by uniformly or partially localizing an inorganic filler that reduces the coefficient of thermal expansion (CTE) uniformly throughout the polyimide layer.
- CTE coefficient of thermal expansion
- the adhesive material formed between the first polyimide layer and the second polyimide layer of the present invention to bond them is an epoxy resin commonly known in the art, and may be an epoxy adhesive containing one or more epoxy groups in a molecule. Can be.
- the thickness of the epoxy adhesive layer is not particularly limited, but is preferably in the range of 2 to 60 ⁇ m, more preferably in the range of 4 to 30 ⁇ m.
- the total thickness of the insulating layer in which both the thermosetting polyimide layer and the epoxy layer are added is preferably formed in the range of 10 to 50 ⁇ m.
- thermosetting polyimide layer is formed on a single-layer polyimide copper foil laminate, for example, a metal foil by a simple coating process
- two such single-layer polyimide-based flexible copper foil laminates may be bonded by epoxy adhesive.
- the epoxy adhesive layer is composed of only a mono-layer, the manufacturing process is simplified and can exhibit heat resistance, flexibility, and the like comparable to that of a two-layer copper foil laminate.
- the method for producing a flexible metal foil laminate according to the present invention may be composed of the following steps.
- a preferred embodiment of the manufacturing method includes the steps of: (a) forming and curing a first polyimide layer on the first conductive metal foil; (b) forming and curing a second polyimide layer on the second conductive metal foil; And (c) coating an epoxy adhesive on the first polyimide layer, the second polyimide layer, or a surface thereof and drying, and then bonding the first polyimide layer and the second polyimide layer in a semi-cured state. It may include.
- a 1st polyimide layer and a 2nd polyimide layer are formed on a 1st conductive metal foil and a 2nd conductive metal foil, respectively.
- the polyimide layer may be prepared by a casting method in which a polyamic acid varnish obtained through the imidization reaction between dianhydride and diamine is coated and dried on copper foil, and then formed by imidization reaction.
- an aromatic tetracarboxylic dianhydride and an aromatic diamine are dissolved in a polar solvent to prepare a polyamic acid solution, and then the polyamic acid solution is coated on a copper foil, and then heat-curable on the copper foil by applying heat.
- a structure with a polyimide layer can be formed.
- Non-limiting examples of dianhydrides used in the preparation of the polyamic acid include pyromellitic dianhydride (PMDA), 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride (BPDA: 3,3 ', 4,4'-biphenyltetracarboxylic dianhydride), 3,3', 4,4'-benzophenoneteneracarboxylic dianhydride (BTDA: 3,3 ', 4,4'-benzophenonetetracarboxylic dianhydride), 4,4'-oxydiphthalic anhydride (ODPA: 4,4 '-(4,4'-isopropylidenediphenoxy) -bis- (phthalic Anhydride) (BPADA: 4,4'-isopropylidenediphenoxy) -bis (phthalic anhydride), 2,2'-bis- (3,4-dicarboxyphenyl) hexafluoropropane dianhydride (6FDA: 2,2'
- non-limiting examples of the diamine include p-phenylene diamine (p-PDA: p-phenylene diamine), m-phenylene diamine (m-PDA: m-phenylene diamine), 4,4'-oxydianiline (4,4'-ODA: 4,4'-oxydianiline), 2,2-bis (4-4 [aminophenoxy] -phenyl) propane (BAPP: 2,2-bis (4- [4-aminophenoxy] phenyl) propane), 2,2'-dimethyl-4,4'-diamino biphenyl (m-TB-HG: 2,2'-Dimethyl-4,4'-diaminobiphenyl), 1,3-bis ( 4-aminophenoxy) benzene (TPER: 1,3-bis (4-aminophenoxy) benzene), 2,2-bis (4- [3-aminophenoxy] phenyl) sulfone (m-BAPS: 2,2- bis (4- [3-aminophen
- an inorganic filler may be included in an appropriate amount.
- the thermal expansion coefficient of the general polyimide resin is 20 to 50 ppm, while the thermal expansion coefficient of the copper foil is 18 ppm, so that the final flexible metal foil laminate may be bent due to the difference in their thermal expansion coefficients.
- the inorganic filler can reduce the difference in the coefficient of thermal expansion (CTE) between the polyimide resin and the copper foil to achieve bending properties and low expansion of the final product, and can also effectively improve mechanical properties and low stress. .
- Non-limiting examples of inorganic fillers include talc, mica, silica, calcium carbonate, magnesium carbonate, clay, calcium silicate, titanium oxide, antimony oxide, and glass fibers. Or mixtures thereof.
- the amount of the inorganic filler is preferably used at least 10% or more and less than 30% based on 100% by weight of the total polyamic acid production reactants, but is not limited thereto.
- Non-limiting examples of the solvent used to prepare the polyamic acid varnish include N-methylpyrrolidinone (NMP: N-methylpyrrolidinone), N, N-dimethylacetamide (DMAc: N, N-dimethylacetamide), tetrahydrofuran (THF: tetrahydrofuran), N, N-dimethylformamide (DMF: N, N-dimethylformamide), dimethyl sulfoxide (DMSO: dimethylsulfoxide), cyclohexane, acetonitrile and the like. These may be used alone or in combination of two or more thereof.
- the prepared polyamic acid varnish preferably has a viscosity of 3,000 to 50,000 cps, but is not limited thereto.
- the thickness of the polyamic acid varnish to be applied may vary depending on the concentration, but the thickness of the first polyimide resin layer after the final imidization reaction is 2 ⁇ 60 micrometers, Preferably it can adjust to become 3-30 micrometers and can apply
- an epoxy adhesive is applied on the surface of the first polyimide layer, the second polyimide layer or both, and then dried, and the polyimide layers are cured in a semi-cured state. Bond.
- Epoxy adhesives used to bond the thermosetting polyimide are required for high heat resistance, flame retardancy, excellent bendability and the like.
- a halogen-based epoxy resin conventional in the art, it is preferably an environmentally friendly non-halogen epoxy resin.
- the epoxy adhesive may be mixed with various materials to secure properties such as heat resistance, flexibility, flame retardancy, and the like, and materials exemplified below, such as carboxyl group-containing acrylic resins, carboxyl group-containing acrylonitrile-butadiene rubber, and (meth ) Acrylic acid esters, (meth) acrylonitrile, unsaturated carboxylic acids, and other components conventional in the art can be used without limitation.
- Non-halogen type epoxy resin is an epoxy resin which does not contain halogen atoms, such as bromine, in a molecule
- the said epoxy resin is not specifically limited, For example, silicone, urethane, a polyimide, polyamide, etc. may be contained. Moreover, phosphorus atom, sulfur atom, nitrogen atom, etc. may be contained in frame
- Non-limiting examples of such epoxy resins include glycidyl ethers such as bisphenol A type epoxy resins, bisphenol F type epoxy resins, or hydrogenated products thereof, phenol novolak type epoxy resins, cresol novolak type epoxy resins, and the like.
- Glycidyl esters such as epoxy resins, hexahydrophthalic acid glycidyl esters and dimer acid glycidyl esters, and glycidyls such as triglycidyl isocyanurate and tetraglycidyl diaminodiphenylmethane
- linear aliphatic epoxy resins such as amine epoxy resins, epoxidized polybutadienes, and epoxidized soybean oils.
- various phosphorus-containing epoxy resins bonded to phosphorus atoms by using a reactive phosphorus compound can be effectively used when constructing a flame-retardant adhesive composition containing no halogen.
- a carboxyl group-containing acrylic resin and / or a carboxyl group-containing acrylonitrile-butadiene rubber (Hereinafter, “acrylonitrile-butadiene rubber” is called “NBR”) can be used.
- the carboxyl group-containing acrylic resin has a glass transition temperature (T g ) in the range of -40 to 30 ° C. to provide an appropriate tack to the adhesive and has excellent handleability. What consists of monomers which have can be used. Preferred glass transition temperatures (T g ) range from -10 to 25 ° C.
- the measured value by gel permeation chromatography is 100,000-1 million, and, as for the weight average molecular weight of the said acrylic resin, it is more preferable that it is 300,000-850,000.
- an acrylic resin include copolymerization of three components of (a) acrylic acid ester and / or methacrylic acid ester, (b) acrylonitrile and / or methacrylonitrile, and (c) unsaturated carboxylic acid.
- the obtained acrylic polymer is mentioned.
- the acrylic polymer may be a copolymer containing only the components (a) to (c), and may be a copolymer containing other conventional monomers or oligomer components.
- Acrylic acid esters and / or methacrylic acid esters can impart flexibility to the acrylic adhesive composition.
- Non-limiting examples of usable acrylate esters include methyl (meth) acrylate, ethyl (meth) acrylate, n-butyl (meth) acrylate, isobutyl (meth) acrylate, isopentyl (meth) acrylate, and (meth) N-hexyl acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-octyl (meth) acrylate, isonyl (meth) acrylate, n-decyl (meth) acrylate, ( Isomethacyl acrylate.
- the (meth) acrylic-acid alkylester whose carbon atom number of an alkyl group is 1-12, especially 1-4 is preferable.
- These (meth) acrylic acid esters can be used individually by 1 type, or can also use 2 or more types together.
- the content of the (meth) acrylic acid ester component is preferably 50 to 80% by weight, more preferably 55 to 75% by weight relative to 100% by weight of the total epoxy adhesive.
- Acrylonitrile and / or methacrylonitrile can impart heat resistance, adhesion and chemical resistance to the adhesive sheet.
- the content of the (meth) acrylonitrile is preferably 15 to 45% by weight, more preferably 20 to 40% by weight based on 100% by weight of the total epoxy adhesive.
- An unsaturated carboxylic acid provides adhesiveness and becomes a crosslinking point at the time of heating. It may be a copolymerizable vinyl monomer having a carboxyl group.
- unsaturated carboxylic acids that can be used include acrylic acid, methacrylic acid, crotonic acid, maleic acid, fumaric acid, itaconic acid and the like.
- the content of the unsaturated carboxylic acid component is preferably 2 to 10% by weight, more preferably 2 to 8% by weight relative to 100% by weight of the total epoxy adhesive.
- carboxyl group-containing acrylic resin examples include, for example, Paraclone ME-3500-DR (manufactured by Negami Kogyo Co., Ltd., glass transition temperature -35 ° C, weight average molecular weight of 600,000, -COOH), teisan resin WS023DR (Nagase Chem) Tex manufacture, glass transition temperature -5 degreeC, weight average molecular weight 450,000, -OH / -COOH containing, Teisan resin SG-280DR (made by Nagase Chemtex, glass transition temperature -30 degreeC, weight average molecular weight 900,000,- COOH containing), teisan resin SG-708-6DR (made by Nagase Chemtex, 5 degreeC of glass transition temperature, 800,000 of weight average molecular weights, -OH / -COOH containing), etc. are mentioned.
- the said acrylic resin can be used individually by 1 type, or can use 2 or more types together.
- Examples of the carboxyl group-containing NBR that can be used in the present invention include acrylonitrile and butadiene, with respect to 100% by weight of acrylonitrile and butadiene, and the amount of acrylonitrile is preferably 5 to 70% by weight, particularly preferably Carboxylated molecular chain ends of copolymerized rubbers copolymerized to a ratio of 10 to 50% by weight, or copolymerized rubbers of acrylonitrile and butadiene with carboxyl group-containing monomers such as acrylic acid and maleic acid. .
- the monomer which has carboxyl groups, such as methacrylic acid can be used as an example.
- the ratio of the carboxyl group in the said carboxyl group-containing NBR is not specifically limited, Preferably it is 1-10 mol%, Especially preferably, Preferably it is 2-6 mol%.
- carboxyl group-containing NBR Nipol 1072 (manufactured by Nihon Xeon), PNR-1H (manufactured by JSR), etc., which have a small amount of ionic impurities, may be used as trade names.
- high-purity carboxyl group-containing acrylonitrile butadiene rubber is expensive and cannot be used in large quantities, it is effective in that adhesiveness and migration resistance can be improved simultaneously.
- the compounding quantity of a carboxyl group-containing NBR component is not specifically limited, It is 10-200 weight part normally with respect to 100 weight part of non-halogen-type epoxy resin components, Preferably it is 20-150 weight part.
- the obtained flexible copper foil laminated board becomes excellent in flame retardance and peeling strength with copper foil.
- the said carboxyl group-containing acrylic resin and / or carboxyl group-containing NBR can be used individually by 1 type, respectively, or can also use 2 or more types together.
- curing agent will not be specifically limited if it is normally used as a hardening
- examples of such a curing agent include polyamine curing agents, acid anhydride curing agents, boron trifluoride complex salts, phenol resins, and the like.
- Non-limiting examples of the polyamine curing agent include aliphatic amine curing agents such as diethylenetriamine, tetraethylenetetramine, tetraethylenepentamine, alicyclic amine curing agents such as isophoronediamine, diaminodiphenylmethane, and phenyl.
- Aromatic amine curing agents such as lendiamine, dicyandiamide, and the like.
- Non-limiting examples of acid anhydride curing agents include phthalic anhydride, pyromellitic anhydride, trimellitic anhydride, hexahydro phthalic anhydride, and the like.
- curing agent which can provide more excellent heat resistance at the time of using for a flexible copper foil laminated board is preferable.
- curing agent can be used individually by 1 type, or may use 2 or more types together.
- curing agent is not specifically limited, It is 0.5-20 weight part normally with respect to 100 weight part of non-halogen-type epoxy resins, Preferably it is 1-15 weight part.
- a hardening accelerator can be used as needed, and it is preferable to add and mix as much as possible.
- a hardening accelerator will not be specifically limited if it is used for promotion of reaction of a non-halogen type epoxy resin and a hardening
- curing accelerators include methylimidazole, and ethylisocyanate compounds of these compounds, 2-phenylimidazole, 2-phenyl-4-methylimidazole, 2-phenyl-4-methyl- Imidazole compounds such as 5-hydroxymethylimidazole and 2-phenyl-4,5-dihydroxymethylimidazole; Triphenylphosphine, tributylphosphine, tris (p-methylphenyl) phosphine, tris (p-methoxyphenyl) phosphine, tris (p-ethoxyphenyl) phosphine, triphenylphosphine and triphenylborate, Triorganophosphines, such as tetraphenyl phosphine and tetraphenyl bo
- the compounding quantity of the said hardening accelerator component is not specifically limited, It is 0.1-15 weight part normally with respect to 100 weight part of epoxy resins, Preferably it is 0.5-10 weight part, Especially preferably, it is 1-5 weight part.
- Phosphate and / or diphosphinate are components that do not contain halogen atoms and impart flame retardancy.
- the said phosphinate has a C1-C3 alkyl group, and it is more preferable that it is an ethyl group especially.
- the metal component forming the salt is particularly preferably aluminum. Phosphate salts have a high phosphorus content and can exhibit particularly high flame retardancy.
- the phosphinates used in the present invention preferably have an average particle diameter of 20 ⁇ m or less, more preferably 0.1 ⁇ m to 10 ⁇ m. Even if the average particle diameter of phosphinates is too big or small, the dispersibility with respect to the epoxy adhesive composition of this invention may worsen, and a problem may arise in flame retardance, heat resistance, and insulation.
- phosphinates examples include Exolit OP930 (manufactured by Clariant, aluminum diethylphosphinate salt, phosphorus content of 23% by mass) and the like under trade names.
- average particle diameter means the particle diameter of the volume average measured by the laser diffraction scattering method.
- phosphinates In addition to the phosphinates, it is also possible to use other phosphorus-based flame retardants in a range that does not deteriorate migration resistance, but it is preferable to use the phosphinates alone. Since phosphate esters worsen migration resistance, it is not very preferable to use phosphate esters together.
- the compounding quantity of phosphinates is not specifically limited, Inorganic solid components, such as inorganic in an adhesive composition from a viewpoint of ensuring favorable flame retardance As phosphorus content rate with respect to 100 weight part of organic resin components except a filler, Preferably it may be 2.0-4.5 weight part, and it is more preferable that it is 2.5-4.0 weight part.
- An inorganic filler can be used together as a filler other than the said phosphinates.
- said inorganic filler if it is conventionally used for an adhesive sheet, a coverlay film, and a flexible copper foil laminated board, it will not specifically limit.
- Metal oxides such as aluminum oxide, magnesium hydroxide, silicon dioxide, and molybdenum oxide, etc. can be used from the point which can also act as a flame retardant adjuvant, Preferably it is aluminum hydroxide and magnesium hydroxide.
- These inorganic fillers may be used individually by 1 type, or may use 2 or more types together.
- the compounding quantity of the said inorganic filler is not specifically limited, Preferably it is 5-50 weight part, More preferably, it is 10-40 weight part with respect to a total of 100 weight part of the organic resin component in an adhesive composition.
- the epoxy adhesive component may be used in the manufacture of a flexible copper foil laminate as a solvent, but may be dissolved or dispersed in an organic solvent to produce the composition as a solution or dispersion (hereinafter, simply referred to as "solution"). .
- Non-limiting examples of organic solvents that can be used include N, N-dimethylacetamide, methyl ethyl ketone, N, N-dimethylformamide, cyclohexanone, N-methyl-2-pyrrolidone, toluene, methanol, ethanol , Isopropanol, acetone and the like.
- Preferred are N, N-dimethylacetamide, methylethylketone, N, N-dimethylformamide, cyclohexanone, N-methyl-2-pyrrolidone and toluene, particularly preferably N, N-dimethylacetic Amide, methyl ethyl ketone, toluene.
- These organic solvents can be used individually by 1 type, or can also use 2 or more types together.
- the total concentration of the solid content excluding the organic solvent in the adhesive solution is usually 10 to 45% by weight, preferably 20 to 40% by weight.
- an adhesive solution has favorable applicability
- the epoxy adhesive composition of the present invention may contain plasticizers, antioxidants, flame retardants, dispersants, viscosity modifiers, leveling agents, or other conventional additives, if necessary, within a range that does not significantly impair the objects and effects of the present invention. It can add and use suitably.
- the organic resin component and the inorganic solid component and organic solvent added as needed may be mixed using a pot mill, a ball mill, a homogenizer, a super mill, and the like.
- the method of applying the above-mentioned epoxy adhesive composition on the polyimide layer is a conventional coating method known in the art, such as dip coating, die coating, roll coating, comma coating, Various methods such as casting or mixing thereof can be used without limitation.
- the method of drying or bonding the applied epoxy adhesive layer may also be configured by appropriately adjusting within the conventional temperature, pressure range known in the art.
- the present invention provides a flexible printed circuit board having a flexible metal foil laminate having the aforementioned structural features.
- the flexible printed circuit board exhibits excellent performances such as excellent heat resistance, insulation resistance, flexibility, flame retardancy, and chemical resistance due to polyimide, it can contribute to high functionalization and long life of various electronic devices.
- the prepared polyamic acid varnish was coated on an electrolytic copper foil (ILJIN CORP.) Having a thickness of 12 ⁇ m using a doctor blade. At this time, the coated thickness was adjusted so that the final polyimide resin layer after the curing process was 6 ⁇ m thick. After finishing the coating of the polyamic acid varnish, it was dried for 3 minutes at 140 °C, and then dried for 5 minutes at 200 °C. Next, the temperature was raised to 350 degreeC, the imidation reaction was advanced, and the copper foil laminated board was manufactured.
- ILJIN CORP. electrolytic copper foil
- the components of the epoxy adhesive composition were mixed in the proportions shown in the blending examples of Table 1 below, and the total amount of the organic solid component and the inorganic solid component was added to the obtained mixture by adding a solvent in which the mass ratio of methyl ethyl ketone / toluene was mixed at 1: 1.
- a dispersion having a concentration of 30% by mass was prepared.
- the dispersion liquid of the said Example 1-2 was apply
- Two identical products were prepared with the composition semi-cured by drying in it.
- the epoxy adhesive side of the coated product was combined and thermocompression-bonded in a roll laminator at 130 ° C. and a linear pressure of 20 N / cm, followed by post-curing at 80 ° C. for 2 hours and at 160 ° C. for 4 hours to produce a flexible copper foil laminate ( 2).
- p-PDA p-phenylene diamine
- NMP N-methylpyrrolidinone
- Example 2 Except that the relative ratio of p-PDA, ODA, BPDA, PMDA, Talc was changed in various ways as shown in Table 2, the same procedure as in Example 1 was carried out to produce the flexible copper foil laminates of the final examples 3 to 6, respectively. Prepared. These properties were measured and listed in Table 3 below.
- this adhesive component was dried on the one side of the polyimide film (brand name: Apical NPI, Kaneka Corporation, thickness: 12.5 micrometers) with an applicator, and the said dispersion liquid was dried. After apply
- the adhesive layer-coated film was placed in the center, and thermally compressed using a roll laminator at 130 ° C. and a linear pressure of 20 N / cm using electrolytic copper foil above and below, followed by 2 hours at 80 ° C., and additionally at 160 ° C. for 4 hours.
- the flexible copper foil laminated sheet was manufactured by carrying out post-curing.
- thermoplastic polyimide varnish of Comparative Example 2-1 was applied with an applicator so that the thickness after final drying was 4 ⁇ m, and at 140 ° C. Dried for 3 minutes, and then dried for 5 minutes at 250 °C to prepare two identical products.
- thermoplastic polyimide surface of the coated product was combined and thermally pressed in a roll laminator under a high temperature and high pressure condition of 370 ° C. and a linear pressure of 20 KN / cm to prepare a double-sided flexible copper foil laminate.
- the copper foil laminate of Comparative Example 2 since excessive use conditions (for example, high temperature and high pressure) are required at the time of adhesion, there was a difficulty in the manufacturing process.
- the copper foil (the circuit) is peeled off at a rate of 50 mm / min in a 90 degree direction with respect to the surface of the laminate under a condition of 25 ° C.
- the minimum value of the force required to make a measurement was measured and shown as peel strength.
- test piece was manufactured by cutting a flexible copper foil laminated board to 25 mm side, and the test piece was suspended for 30 second on the 300 degreeC solder bath.
- the case where expansion, peeling, or discoloration did not occur in the test piece was evaluated as "good” and represented by ⁇ , and the case where at least one of expansion, peeling or discoloration occurred in the test piece was evaluated as "defect" and represented by x.
- the flame retardance of the sample was measured.
- the flexible copper foil laminate of Comparative Example 1 exhibited very poor physical properties in terms of flexibility, whereas all the examples of the present invention exhibited the basic physical properties required as the flexible copper foil laminate, such as heat resistance, flame retardancy, flexibility, and copper foil peel strength. All of them have excellent physical properties.
- the manufacturing process is relatively simple in the present invention, and thus it may be usefully used in various flexible printed board fields. I could confirm it.
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
Description
Claims (7)
- (a) 제 1면상에 제 1 폴리이미드층이 형성된 제 1 도전성 금속박; 및(b) 제 1면상에 제 2 폴리이미드층이 형성된 제 2 도전성 금속박을 포함하며, 상기 제 1 폴리이미드층과 제 2 폴리이미드층이 에폭시 접착제에 의해 서로 접합되어 있는 것이 특징인 연성 금속박 적층판.
- 제1항에 있어서, 상기 연성 동박 적층판은(a) 제 1 도전성 금속박;(b) 제 1 폴리이미드층;(c) 에폭시 접착제층;(d) 제2 폴리이미드층;(e) 제2 도전성 금속박을 포함하고, 이들이 순차적으로 적층되는 것이 특징인 연성 금속박 적층판.
- 제1항에 있어서, 상기 도전성 금속박의 두께는 5 내지 40 ㎛이며, 폴리이미드층의 두께는 2 내지 60 ㎛ 이며, 에폭시 접착제층의 두께는 2 내지 60 ㎛ 범위인 것이 특징인 연성 금속박 적층판.
- 제1항에 있어서, 상기 도전성 금속박은 구리, 주석, 금, 은 또는 이들의 혼합 형태인 것이 특징인 연성 금속박 적층판.
- 제1항에 있어서, 상기 폴리이미드층은 열팽창계수(CTE)를 감소시키는 무기 충전제가 폴리이미드층 전체에 균일하게 또는 일부에 편재하여 분포하는 것이 특징인 연성 금속박 적층판.
- 제1항 내지 제5항 중 어느 한 항에 기재된 연성 금속박 적층판을 구비하는 연성 인쇄 회로 기판.
- (a) 제1도전성 금속박 상에 제1폴리이미드층을 형성시키고 경화하는 단계;(b) 제2도전성 금속박 상에 제2폴리이미드층을 형성시키고 경화하는 단계; 및(c) 상기 제1 폴리이미드층, 제2폴리이미드층 또는 이들 모두의 표면 상에 에폭시 접착제를 코팅하고 건조한 후 반경화 상태에서 제1 폴리이미드층과 제2폴리이미드층을 접합하는 단계포함하고, 제1항 내지 제5항 중 어느 한 항에 기재된 연성 금속박 적층판의 제조방법.
Priority Applications (3)
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JP2011547782A JP5814127B2 (ja) | 2009-01-23 | 2010-01-22 | 新規な軟性金属箔積層板およびその製造方法 |
CN2010800128683A CN102361753A (zh) | 2009-01-23 | 2010-01-22 | 一种新型挠性金属箔层叠板及其制造方法 |
US13/145,959 US20120018197A1 (en) | 2009-01-23 | 2010-01-22 | Novel ductile metal foil laminate and method for producing the same |
Applications Claiming Priority (2)
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KR10-2009-0006195 | 2009-01-23 | ||
KR1020090006195A KR101102180B1 (ko) | 2009-01-23 | 2009-01-23 | 신규 연성 금속박 적층판 및 그 제조방법 |
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WO2010085113A2 true WO2010085113A2 (ko) | 2010-07-29 |
WO2010085113A3 WO2010085113A3 (ko) | 2010-11-04 |
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US (1) | US20120018197A1 (ko) |
JP (1) | JP5814127B2 (ko) |
KR (1) | KR101102180B1 (ko) |
CN (1) | CN102361753A (ko) |
WO (1) | WO2010085113A2 (ko) |
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KR101237410B1 (ko) | 2011-05-24 | 2013-02-27 | 송민화 | 에프씨씨엘 및 이의 제조방법과 상기 에프씨씨엘을 이용한 안테나 |
CN102630126B (zh) * | 2012-04-01 | 2014-04-16 | 松扬电子材料(昆山)有限公司 | 复合式双面铜箔基板及其制造方法 |
CN102825861B (zh) * | 2012-08-16 | 2015-07-22 | 新高电子材料(中山)有限公司 | 导热双面挠性覆铜板及其制作方法 |
CN103514988B (zh) * | 2012-12-14 | 2016-01-20 | 上海空间电源研究所 | 一种扁平式双层功率信号传输电缆及其形成方法 |
KR101579645B1 (ko) * | 2013-04-10 | 2015-12-22 | 코오롱인더스트리 주식회사 | 폴리이미드 커버기판 |
US20150122532A1 (en) * | 2013-11-04 | 2015-05-07 | Teledyne Technologies Incorporated | High temperature multilayer flexible printed wiring board |
KR101582398B1 (ko) * | 2014-01-06 | 2016-01-05 | 주식회사 두산 | 수지 이중층 부착 동박, 이를 포함하는 다층 인쇄 회로 기판 및 그 제조 방법 |
CN103963386B (zh) * | 2014-03-05 | 2016-05-11 | 金安国纪科技股份有限公司 | 金属基覆铜板及其制备方法 |
CN103963381B (zh) * | 2014-03-05 | 2016-02-17 | 金安国纪科技股份有限公司 | 金属基覆铜板及其制备方法 |
KR102056500B1 (ko) * | 2014-10-24 | 2019-12-16 | 주식회사 두산 | 커버레이용 금속박 적층체 및 커버레이 비포함 다층 연성 인쇄회로기판 |
KR101705078B1 (ko) | 2015-02-09 | 2017-02-10 | 도레이첨단소재 주식회사 | 양면 금속적층 필름의 제조방법 및 그로부터 제조되는 양면 금속적층 필름 |
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KR101890036B1 (ko) * | 2016-11-21 | 2018-08-22 | 에스디플렉스(주) | 4층 구조의 연성 동박적층판의 제조 방법 |
US11021606B2 (en) * | 2017-09-13 | 2021-06-01 | E I Du Pont De Nemours And Company | Multilayer film for electronic circuitry applications |
JP7446741B2 (ja) * | 2018-09-28 | 2024-03-11 | 日鉄ケミカル&マテリアル株式会社 | 金属張積層板及び回路基板 |
KR102329838B1 (ko) * | 2019-04-30 | 2021-11-22 | 도레이첨단소재 주식회사 | 연성 금속박 적층 필름, 이를 포함하는 물품 및 상기 연성 금속박 적층 필름의 제조방법 |
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KR20010110698A (ko) * | 1999-03-26 | 2001-12-13 | 센타니 마이클 에이. | 다층 적층 및 이를 생성하는 방법 |
JP2005162878A (ja) * | 2003-12-02 | 2005-06-23 | Toyobo Co Ltd | ポリイミドフィルム、その製造方法およびそれを用いたベース基板 |
JP2008130784A (ja) * | 2006-11-21 | 2008-06-05 | Toyobo Co Ltd | 多層回路基板 |
Also Published As
Publication number | Publication date |
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WO2010085113A3 (ko) | 2010-11-04 |
KR20100086786A (ko) | 2010-08-02 |
CN102361753A (zh) | 2012-02-22 |
KR101102180B1 (ko) | 2012-01-02 |
JP5814127B2 (ja) | 2015-11-17 |
US20120018197A1 (en) | 2012-01-26 |
JP2012515671A (ja) | 2012-07-12 |
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