WO2010061563A1 - 電子部品用保護フィルム、その製造方法および用途 - Google Patents
電子部品用保護フィルム、その製造方法および用途 Download PDFInfo
- Publication number
- WO2010061563A1 WO2010061563A1 PCT/JP2009/006265 JP2009006265W WO2010061563A1 WO 2010061563 A1 WO2010061563 A1 WO 2010061563A1 JP 2009006265 W JP2009006265 W JP 2009006265W WO 2010061563 A1 WO2010061563 A1 WO 2010061563A1
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- WO
- WIPO (PCT)
- Prior art keywords
- protective film
- carboxylic acid
- unsaturated carboxylic
- ethylene
- acid copolymer
- Prior art date
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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
- 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
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/22—Secondary treatment of printed circuits
- H05K3/28—Applying non-metallic protective coatings
- H05K3/284—Applying non-metallic protective coatings for encapsulating mounted components
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J131/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an acyloxy radical of a saturated carboxylic acid, of carbonic acid, or of a haloformic acid; Adhesives based on derivatives of such polymers
- C09J131/02—Homopolymers or copolymers of esters of monocarboxylic acids
- C09J131/04—Homopolymers or copolymers of vinyl acetate
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
- C09J133/06—Homopolymers or copolymers of esters of esters containing only carbon, hydrogen and oxygen, the oxygen atom being present only as part of the carboxyl radical
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
- C09J133/04—Homopolymers or copolymers of esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
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- C—CHEMISTRY; METALLURGY
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- C09J7/00—Adhesives in the form of films or foils
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- G—PHYSICS
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- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
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- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
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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
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- C—CHEMISTRY; METALLURGY
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- C—CHEMISTRY; METALLURGY
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- H—ELECTRICITY
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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
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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
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Definitions
- the present invention relates to a protective film for electronic parts, a production method thereof, and an application.
- thermosetting adhesive mainly comprising a copolymer of ethylene, an acrylate-based and / or methacrylate-based monomer, maleic acid and / or maleic anhydride is provided on at least one surface of an organic film having heat resistance.
- a protective film comprising a layer is described.
- Patent Document 3 describes a laminated film obtained by extrusion laminating a mixed resin composition containing an ethylene-unsaturated carboxylic acid copolymer on at least one side of a polyester film, and can be used as a packaging material for foods and the like. It is described.
- Patent Documents 1 and 2 are thermosetting adhesive layers, components such as a curing agent and an organic peroxide are required in addition to the main agent exhibiting adhesiveness, and handling is necessary. Moreover, there was a tendency not to be suitable for long-term storage.
- the invention of Patent Document 3 is an invention mainly aimed at the use of packaging materials, and belongs to a completely different field from the protective film for electronic parts as in the present application.
- the adhesive layer of Patent Document 1 or 2 is thermosetting and formed by a coating method, an adhesive solution coating process, a (semi) curing curing process, and (semi) post-curing
- the process of laminating the release film on the adhesive is required to be a complicated process (each process is independent batch production), and it takes a relatively long time to produce a single protective film. There was room for improvement in sex.
- an organic solvent is used for conventional adhesive application, there is room for improvement in the working environment. Furthermore, for example, several tens of minutes of curing steps are required for adhesion and curing even after lamination on a flexible printed circuit board (FPC).
- the present invention can be described below.
- the metal cation constituting the metal salt is Na + , K + , Li + , Ca 2+ , Mg 2+ , Zn 2+ , Cu 2+ , Co
- the adhesive layer is obtained by extruding an ethylene-unsaturated carboxylic acid copolymer or a metal salt thereof from a T-die, and any one of (1) to (3) The protective film for electronic components as described in a crab.
- a semiconductor device comprising:
- the protective film for electronic parts of the present invention is excellent in adhesion to the metal constituting the electronic parts, and further has excellent chemical resistance because corrosion is suppressed against chemicals used in circuit formation by etching. For this reason, for example, when manufacturing a multilayer flexible printed wiring board by build-up, it is possible to perform etching in a state in which the protective film for electronic components is laminated, and in the completed multilayer flexible printed wiring board, the protective film for electronic components Functions as an insulating layer. Thus, the reliability of the product to which the protective film for electronic parts of the present invention is attached can be improved.
- the ethylene-unsaturated carboxylic acid copolymer or its metal salt contained in the adhesive layer can be molded by extrusion from a T-die, and the protective film for electronic parts of the present invention, which becomes a thermoplastic adhesive layer, has excellent productivity. It has a configuration.
- the method for producing a protective film for electronic parts according to the present invention has an adhesive layer formed by extruding an ethylene-unsaturated carboxylic acid copolymer or a metal salt thereof from a T die, and is compared with a thermosetting adhesive. Since it can be easily manufactured without taking complicated processes, the process can be simplified and the manufacturing time can be greatly shortened. Consideration is reduced.
- FIG. 2A is a schematic top perspective view of the IC tag in the present embodiment
- FIG. 2B is a cross-sectional view taken along the line AA in FIG. It is the graph which showed the adhesive strength of the contact bonding layer with respect to the copper foil in an Example. It is the graph which showed the adhesive strength of the contact bonding layer with respect to the copper foil in an Example.
- a protective film 10 for an electronic component includes a base material 12, a layer containing an anchor coat agent (hereinafter, anchor coat layer 14), an adhesive layer 16, and a release film 18. It becomes.
- anchor coat layer 14 an anchor coat agent
- the release film paper, PET film, or the like can be used.
- the substrate 12 is made of polyparaphenylene terephthalamide resin (PPTA), polyethylene terephthalate resin (PET), polyethylene naphthalate resin (PEN), polyimide resin, polyphenylene sulfide resin, polyether ether ketone resin (PEEK), various liquid crystalline polymers. (LCP), heat-resistant resin such as polyolefin resin can be included. In this embodiment, it is preferable that polyimide resin or PET is included from the viewpoint of improving moderate heat resistance.
- the thickness of the substrate 12 is about 2 to 100 ⁇ m, preferably about 2 to 50 ⁇ m.
- the adhesive layer 16 includes an ethylene-unsaturated carboxylic acid copolymer or a metal salt thereof.
- the adhesive layer 16 contains such a resin, the adhesiveness with the metal film is improved, so that the product reliability is improved. In particular, as the amount of carboxylic acid increases, the adhesion with the metal film is further improved.
- the thickness of the adhesive layer 16 is about 5 to 30 ⁇ m.
- the ethylene-unsaturated carboxylic acid copolymer or metal salt thereof contains 3 to 30% by weight, preferably 4 to 20% by weight, more preferably 7 to 20% by weight, particularly preferably a structural unit derived from an unsaturated carboxylic acid. Contains 10-20% by weight. Thereby, it is excellent in balance with the adhesiveness of the adhesive layer 16 of the protective film for electronic components, the adhesiveness with the metal which comprises an electronic component, and the moldability of the protective film for electronic components. Furthermore, corrosion is suppressed with respect to chemicals used in circuit formation by etching, and chemical resistance is excellent. In addition, from the viewpoint of improving the adhesiveness between the adhesive layer 16 and the metal, an unsaturated carboxylic acid copolymer may be added separately as long as the molding processability is not affected.
- the ethylene-unsaturated carboxylic acid copolymer used in this embodiment is a copolymer of ethylene and an unsaturated carboxylic acid.
- an unsaturated carboxylic acid having 3 to 8 carbon atoms specifically, acrylic acid, methacrylic acid, itaconic acid, maleic anhydride, maleic acid monomethyl ester, maleic acid monoethyl ester, etc. are used. It is done.
- acrylic acid and methacrylic acid are particularly preferably used from the viewpoint of the above effects.
- the ethylene-unsaturated carboxylic acid copolymer may be a ternary or higher multi-component copolymer, and in addition to the above-mentioned components capable of copolymerization with ethylene, methyl acrylate, ethyl acrylate, isobutyl acrylate N-butyl acrylate, isooctyl acrylate, methyl methacrylate, isobutyl methacrylate, dimethyl maleate, diethyl maleate and the like; vinyl esters such as vinyl acetate and vinyl propionate; propylene, butene, 1 Unsaturated hydrocarbons such as 1,3-butadiene, pentene, 1,3-pentadiene and 1-hexene; oxides such as vinyl sulfate and vinyl nitrate; halogen compounds such as vinyl chloride and vinyl fluoride; Secondary amine compound; carbon monoxide, sulfur dioxide, etc. may be copolymerized as a third component
- the metal salt (ionomer) of the ethylene-unsaturated carboxylic acid copolymer used in the present embodiment at least a part of the carboxyl groups in the ethylene-unsaturated carboxylic acid copolymer is crosslinked with a metal cation. Is.
- a suitable ionomer is based on a copolymer of ethylene and an unsaturated carboxylic acid synthesized by a high-pressure radical polymerization method, and 10 to 90% of the carboxylic acid group derived from the unsaturated carboxylic acid is neutralized with a cation. It is.
- the melting point of the ethylene-unsaturated carboxylic acid copolymer or its metal salt is generally about 70 to 110 ° C.
- the melt flow rate of the ethylene-unsaturated carboxylic acid copolymer or metal salt thereof is 0.1 to 100 g. / 10 minutes, preferably 1 to 50 g / 10 minutes.
- the adhesive layer 16 may contain additives such as an antioxidant, a stabilizer, a lubricant, an adhesive, and a colorant.
- the anchor coating agent used in the present embodiment can be selected from anchor coating agents such as alkyl titanates and other titanium-based, polyurethane-based, polyester-based, polyethyleneimine-based, and polyisocyanate-based anchor coating agents.
- An anchor coat agent is not limited to this, It can select suitably according to a use.
- the anchor coating agent may be a one-component solvent type, a two-component solvent type, a three-component solvent type, or these solvent-free aqueous types.
- anchor coating agents can be used by appropriately selecting from commercially available products. Moreover, the thing suitable for the objective of this invention can also be selected from what is marketed as a coating agent.
- commercially available products include Chitabond (trade name, manufactured by Nippon Soda Co., Ltd., T-19, T-120, etc.), Organic (trade name, Matsumoto Co., Ltd., PC-105, etc.), Takelac / Takenet (trade name, manufactured by Mitsui Polyurethanes, A-3200 / A-3003, A-968 / A-8, etc.), Seika Bond (trade name, manufactured by Dainichi Seika Kogyo, A-141 / C-137, E -263 / C-26, etc.), Seikadine (trade name, manufactured by Dainichi Seika Kogyo Co., Ltd., 2710A / 2710B, 2730A / 2730B / DEW I, 2710A / 2810C / DEW I, etc.) PM
- anchor coating agent is commercially available as an adhesive having antistatic properties (for example, Bondip PA100), it may be used.
- the substrate having the anchor coat layer 14 can be obtained by applying the anchor coat agent to the substrate in-line or off-line.
- the thickness of the anchor coat layer 14 is usually about 0.01 to 5 ⁇ m, and particularly preferably 0.01 to 0.5 ⁇ m.
- ozone treatment, plasma treatment, corona discharge treatment, flame treatment, or the like may be applied to the surface of the base material before forming the anchor coat layer 14 or the surface of the anchor coat layer 14.
- the protective film 10 for an electronic component according to this embodiment can be manufactured by an extrusion laminating method using a T-die, a dry laminating method such as a thermal laminating method, heat sealing, or heat pressing.
- the melting point and the melt flow rate of the ethylene-unsaturated carboxylic acid copolymer or metal salt thereof are in the above ranges, they can be continuously produced by an extrusion laminating method using a T-die.
- Productivity of protective films for parts is greatly improved.
- an ethylene-unsaturated carboxylic acid copolymer or a metal salt thereof is extruded and laminated by a T-die on a film substrate fed out of a roll-shaped polyimide film, a polyester film, or a polyolefin film, and thereafter
- a release film fed out from a state wound in a roll shape can be laminated and continuously laminated with a pressure roll.
- a complicated process is not required but the protective film for electronic components can be manufactured continuously.
- the protective film 10 for electronic components can be manufactured as follows. First, in an extrusion lamination apparatus, an ethylene-unsaturated carboxylic acid copolymer or a metal salt thereof is heated to a predetermined temperature and melted to improve the fluidity of the resin. Then, the molten resin is extruded from a T die and formed into a film shape.
- the extrusion temperature during extrusion lamination varies depending on the type of resin, but the resin temperature measured immediately below the T-die is preferably in the range of 250 to 350 ° C., particularly 280 to 330 ° C.
- This extruded film is sent to a laminating section having a pair of rolls.
- an anchor coat agent is applied to the surface of the base material 12 on which the adhesive layer 16 is to be formed, thereby forming the anchor coat layer 14.
- the anchor coat layer 14 further improves the adhesion between the substrate 12 and the adhesive layer 16.
- the anchor coat agent is applied to the base material 12 with a coating device attached to the extrusion lamination device, and the diluted solvent used for the anchor coat agent is dried with a dryer, and the base material is sent to the laminating section at a constant speed. It is done.
- the release film 18 is also sent to the laminating section.
- the extruded film, the base material 12 with the anchor coat layer 14, and the release film 18 supplied between the pair of rolls of the laminate part are supplied and pressed between the rolls.
- the protective film for electronic parts in which the anchor coat layer 14, the adhesive layer 16, and the release film 18 are laminated in this order is manufactured.
- the method for producing a protective film for electronic parts of the present invention is excellent in productivity because an adhesive layer is formed by extruding an ethylene-unsaturated carboxylic acid copolymer or a metal salt thereof from a T-die.
- the adhesive layer of the protective film for electronic parts of this embodiment is excellent in adhesiveness with metal, especially adhesiveness with copper. Therefore, the protective film for electronic parts of this embodiment has excellent adhesion to metal members such as wiring, electrodes, wires, and leads constituting the electronic parts, and is a surface that is attached to the surface of electronic parts, electronic circuits, etc. It can be used as a protective film. Specifically, it can be used as a surface protective film (coverlay film) for circuit boards, a surface protective film for IC tags, a surface protective film for semiconductor devices, and the like.
- the adhesive layer 16 contains an ethylene-unsaturated carboxylic acid copolymer having a predetermined amount of a structural unit derived from an unsaturated carboxylic acid or a metal salt thereof, whereby the adhesive layer 16 and the metal are mixed. Adhesiveness, particularly with copper, is excellent, and product reliability of circuit boards, IC tags, semiconductor devices, etc. is improved.
- circuit boards include flexible printed wiring boards, rigid boards made of glass epoxy, ceramic, or metal core boards, optical circuits or opto-electric hybrid circuit boards formed on glass or polymers, and TAB tapes. it can.
- the flexible printed wiring board include single-sided, double-sided, and multilayer flexible printed wiring boards.
- the protective film for electronic parts of the present embodiment protects the circuit board by superposing, pressing, and curing the adhesive layer 16 surface, which is peeled off the release film 18 in use, and the metal foil or wiring layer. Can do. Even when the protective film for electronic parts of the present embodiment is used as a cover lay film for a circuit board, the adhesive layer 16 is at a level where there is no practical problem in adhesion and the like.
- the protective film for electronic components of this embodiment is a semiconductor device including a substrate and a semiconductor element mounted on the substrate. It is possible to protect wiring, wires, leads and the like made of metal such as. Examples of the semiconductor device include SOC, SIP, COF tape and the like.
- FIG. 2A shows a schematic top perspective view of the IC tag in the present embodiment.
- the protective film for electronic components is not shown, and shows an antenna and an IC chip on the substrate.
- FIG. 2B is a cross-sectional view taken along the line AA in FIG.
- the IC tag 20 includes an antenna 24 made of a metal such as copper on a base material (base film 22) serving as a base.
- An IC chip 26 is mounted on the board.
- the antenna 24 and the IC chip 26 are electrically connected.
- a protective film for electronic parts that protects the antenna 24 and the IC chip 26 is laminated via the adhesive layer 16.
- the protective film for electronic parts of this embodiment can also be used.
- Polyimide substrate Polyimide film (Product name: Kapton, Toray Industries, Inc., 100m roll)
- PET substrate PET film (Product name: Lumirror, Toray Industries, Inc.)
- Adhesive (a): ethylene-methacrylic acid copolymer, methacrylic acid-derived constituent unit content 4% by weight, MFR 7 g / 10 min
- the adhesive layer of the protective film for electronic parts (a) prepared in the experimental example is brought into contact with the copper foil of the following base material with copper foil (a) or (b), and 0
- the layers were laminated by heat sealing under conditions of 2 MPa, a sealing temperature of 160 ° C., and 0.5 seconds.
- the test was performed even at a seal temperature of 120 ° C, 140 ° C, and 180 ° C.
- the adhesive strength of an adhesive layer and copper foil was confirmed on condition of the following.
- Substrate with copper foil (a): electrolytic copper foil
- Experimental Examples 1 to 5 polyimide (100) / AC layer / adhesive layer (15) / electrolytic copper foil (10)
- Substrate with copper foil (b): surface of rolled copper foil treated with Cr Experimental Examples 1 to 5: polyimide (100) / AC layer / adhesive layer (15) / Cr treated copper foil (10) Experimental Examples 6 to 15: PET (100) / AC layer / adhesive layer (15) / Cr-treated copper foil (10)
- Peeling angle 180 ° peeling condition: 300 mm / min, 25 mm width
- Example 1 to 5 In the configuration of the protective film for electronic parts (a), the protective film for electronic parts was produced using the adhesive layer and the AC agent described in Tables 1 and 2. It was set as Experimental Examples 1-5 in order. In Experimental Examples 1 to 5, before forming the adhesive layer on the anchor coat layer, the surface of the anchor coat layer was subjected to ozone treatment (O 3 concentration: 25 g / m 3 , treatment amount: 1 m 3 / h). went. Table 1 shows the adhesive strength of the adhesive layer to the polyimide film, and Table 2 shows the adhesive strength of the adhesive layer to the copper foil. The results described in Table 2 are shown in FIGS.
- the protective film for electronic parts of the present invention was excellent in adhesiveness to the polyimide film.
- the ethylene-unsaturated carboxylic acid copolymer or metal salt thereof contains 3% by weight or more of a component derived from unsaturated carboxylic acid, so that the copolymer or metal salt thereof is obtained.
- the adhesive layer containing has excellent adhesiveness with the copper foil. As shown in Table 2 and FIGS. 3 and 4, when the content of the structural unit derived from the unsaturated carboxylic acid contained in the adhesive layer increases, the adhesive strength of the adhesive layer to the copper foil tends to improve. It was.
- the adhesive strength to the copper foil is sufficient, and particularly preferably 10% by weight or more. confirmed. Further, if the amount of unsaturated carboxylic acid group in the copolymer exceeds 30% by weight, it is not preferable in the balance of adhesive strength, heat resistance and moldability, but if it is 30% by weight, particularly 20% by weight, The result was excellent in these balances. Therefore, from the viewpoint of the balance between adhesive strength, heat resistance, and moldability, it is preferably 30% by weight or less, particularly preferably 20% by weight or less.
- the protective film for electronic parts of the present invention has resistance to various chemicals used in the electronic component manufacturing process, and it can be understood that even if it is used for a coverlay, for example, the amount of the adhesive layer in the hole portion is small and it can be practically used. Therefore, when the protective film for electronic parts of the present invention is used for circuit boards such as flexible printed boards and rigid printed boards, semiconductor devices, and IC tags, it is presumed that the adhesiveness between the adhesive layer and the metal foil is excellent. . For this reason, it can use suitably for the protective film for these electronic components, a coverlay film, etc.
- the present invention also includes the following configurations.
- the metal cation constituting the metal salt is Na + , K + , Li + , Ca 2+ , Mg 2+ , Zn 2+ , Cu 2+ , Co
- the adhesive layer is obtained by extruding an ethylene-unsaturated carboxylic acid copolymer or a metal salt thereof from a T die, and any of (a) to (c) The protective film for electronic components as described in a crab.
- the ethylene-unsaturated carboxylic acid copolymer or metal salt thereof contains 1 to 30% by weight of a structural unit derived from an unsaturated carboxylic acid, according to any one of (a) to (e) Protective film for electronic parts.
- (I) a step of heating an ethylene-unsaturated carboxylic acid copolymer or a metal salt thereof, and a film formed by extruding a molten ethylene-unsaturated carboxylic acid copolymer or a metal salt thereof from a T-die. And a step of forming an adhesive layer containing an ethylene-unsaturated carboxylic acid copolymer or a metal salt thereof on the substrate, and a method for producing a protective film for electronic parts.
- the ethylene-unsaturated carboxylic acid copolymer or metal salt thereof contains 1 to 30% by weight of a structural unit derived from an unsaturated carboxylic acid, according to any one of (i) to (k) Of manufacturing protective film for electronic parts.
- (M) A circuit board comprising the protective film for electronic components according to any one of (a) to (h).
- (O) comprising a substrate, a semiconductor element mounted on the substrate, and the protective film for electronic parts according to any one of (a) to (h), which covers the semiconductor element.
- Semiconductor device. a base material provided with an antenna; an IC chip mounted on the base material; and the protective film for electronic components according to any one of (a) to (h), covering the antenna and the IC chip.
- An IC tag comprising:
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Abstract
Description
特許文献3には、ポリエステルフィルムの少なくとも片面に、エチレン-不飽和カルボン酸共重合体を含む混合樹脂組成物を押出ラミネートしてなる積層フィルムが記載され、食品等の包装材として用いることができると記載されている。
(1)耐熱性樹脂を含む基材と、
前記基材上に形成された、エチレン-不飽和カルボン酸共重合体またはその金属塩を含む接着層と、を備え、
エチレン-不飽和カルボン酸共重合体またはその金属塩は、不飽和カルボン酸由来の構成単位を3~30重量%含むことを特徴とする電子部品用保護フィルム。
溶融したエチレン-不飽和カルボン酸共重合体またはその金属塩をTダイから押し出して成形されたフィルムを基材に貼り合わせて、該基材上にエチレン-不飽和カルボン酸共重合体またはその金属塩を含む接着層を形成する工程と、
を含むことを特徴とする電子部品用保護フィルムの製造方法。
前記基材の前記接着層が形成される面に、アンカーコート剤を塗布する工程を含むことを特徴とする(8)に記載の電子部品用保護フィルムの製造方法。
前記基板上に搭載された半導体素子と、
前記半導体素子表面に貼り付けられた、(1)乃至(7)のいずれかに記載の電子部品用保護フィルムと、
を備えることを特徴とする半導体装置。
前記基材上に搭載されたICチップと、
前記アンテナおよび前記ICチップ表面に貼り付けられた、(1)乃至(7)のいずれかに記載の電子部品用保護フィルムと、
を備えることを特徴とするICタグ。
図1に示すように、本実施形態の電子部品用保護フィルム10は、基材12、アンカーコート剤を含む層(以下、アンカーコート層14)、接着層16、離型フィルム18が順に積層されてなる。離型フィルム18としては、紙やPETフィルムなどを用いることができる。
本実施形態においては、適度な耐熱性を向上させる観点からポリイミド樹脂又はPETを含むことが好ましい。基材12の厚みは2~100μm、好ましくは2~50μm程度である。
なお、アンカーコート層14を形成する前の基材表面、またはアンカーコート層14表面に、オゾン処理、プラズマ処理、コロナ放電処理、火炎処理等を施していてもよい。
本実施形態の電子部品用保護フィルム10は、Tダイによる押し出しラミネート法や、サーマルラミネート法、ヒートシール、ヒートプレス等のドライラミネート法などにより製造することができる。
例えば、ロール状に巻かれたポリイミドフィルム、ポリエステルフィルム、ポリオレフィンフィルムから繰り出されるフィルム基材上に、エチレン-不飽和カルボン酸共重合体またはその金属塩をTダイにより押し出しラミネートして貼り合わせ、その後ロール状に巻かれた状態から繰り出される離型フィルムを積層し、圧着ロールで連続的に積層することができる。これにより、複雑な工程を必要とせず、連続的に電子部品用保護フィルムを製造することができる。
まず、押し出しラミネーション装置において、エチレン-不飽和カルボン酸共重合体またはその金属塩を所定の温度に加熱して溶融させ、該樹脂の流動性を向上させる。そして、溶融した樹脂をTダイから押し出してフィルム状に成形する。
この押し出し成形されたフィルムは、1対のロールを備えるラミネート部に送られる。
本実施形態の電子部品用保護フィルムの接着層は、金属との接着性、特に銅との接着性に優れている。そのため、本実施形態の電子部品用保護フィルムは、電子部品を構成する配線、電極、ワイヤ、リード等の金属部材との密着性に優れており、電子部品や電子回路等の表面に貼り付ける表面保護フィルムとして用いることができる。具体的には、回路基板の表面保護フィルム(カバーレイフィルム)、ICタグの表面保護フィルム、半導体装置の表面保護フィルムなどとして用いることができる。
図2(a)に、本実施形態におけるICタグの概略上面透視図を示す。なお、図2(a)においては、電子部品用保護フィルムは図示せず、基材上におけるアンテナとICチップを示す。図2(b)は図2(a)のA-A線断面図である。
図2(a)(b)に示すように、ICタグ20は、ベースとなる基材(基材フィルム22)上に、銅などの金属から構成されたアンテナ24を備え、基材フィルム22上にICチップ26が搭載されている。アンテナ24とICチップ26は、電気的に接続されている。さらに、アンテナ24とICチップ26とを保護する電子部品用保護フィルムが、接着層16を介して積層されている。
基材フィルム22として、本実施形態の電子部品用保護フィルムを用いることもできる。
下記においてカッコ内の数値は層の厚み(μm)を表し、ACはアンカーコーティング剤を表す。(AC層の厚み:0.2μm)
・電子部品用保護フィルム(a):ポリイミド製基材(25)/AC層/接着層(30)
・電子部品用保護フィルム(b):PET製基材(100)/AC層/接着層(20)
装置 住友重機械モダン株式会社製
押出機 65mmφ L/D=28
スクリュー 3ステージ型 CR=4.78
ダイ 900mm幅 インナーディッケル型
樹脂温度 接着剤(f)は250℃、その他の接着剤は300℃
加工速度 120m/min
・ポリイミド製基材:ポリイミドフィルム(製品名:カプトン、東レ株式会社、100m巻)
・PET製基材:PETフィルム(製品名:ルミラー、東レ株式会社)
AC剤(a):セイカダイン2710A 1重量部、セイカダイン2710C 2重量部(大日精化株式会社)
AC剤(b):セイカダイン2710A 1重量部、セイカダイン2810C(T) 4重量部、DEW I 0.25重量部(大日精化株式会社)
接着剤(a):エチレン-メタクリル酸共重合体、メタクリル酸由来の構成単位の含有量4重量%、MFR 7g/10分
・メルトフローレート(MFR)
JIS K 7210-1999に準拠して、測定温度190℃、荷重2,160gで測定した。
電子部品用保護フィルムを40℃2日間放置後、以下の条件でポリイミドフィルムに対する接着層の接着強度を確認した。
剥離角度;180°剥離
剥離条件;300mm/min、25mm幅
以下の銅箔付き基材(a)または(b)の銅箔に、実験例で作成された電子部品用保護フィルム(a)の接着層を当接し、0.2MPa、シール温度160℃、0.5秒間の条件でヒートシールすることにより積層した。実験例1~4においては、シール温度120℃、140℃、180℃でも行った。そして、接着層と銅箔との接着強度を以下の条件で確認した。
実験例1~5:ポリイミド(100)/AC層/接着層(15)/電解銅箔(10)
実験例6~15:PET(100)/AC層/接着層(15)/電解銅箔(10)
実験例1~5:ポリイミド(100)/AC層/接着層(15)/Cr処理銅箔(10)
実験例6~15:PET(100)/AC層/接着層(15)/Cr処理銅箔(10)
剥離条件;300mm/min、25mm幅
電子部品用保護フィルム(a)の構成において、接着層およびAC剤として表1,2に記載のものを用いて電子部品用保護フィルムを製造した。順に実験例1~5とした。なお、実験例1~5においては、アンカーコート層上に接着層を形成する前に、アンカーコート層表面に、オゾン処理(O3濃度:25g/m3、処理量:1m3/h)を行った。
表1にポリイミドフィルムに対する接着層の接着強度を示し、表2に銅箔に対する接着層の接着強度を示す。表2に記載の結果を図3,4に示す。
電子部品用保護フィルム(b)の構成において、AC剤として「AC剤(a)」を用い、接着剤として表3に記載のものを用いて電子部品用保護フィルムを製造した。順に実験例6~15とした。
表3に銅箔に対する接着層の接着強度を示す。
耐薬品性の試験
実験例2において作成した電子部品用保護フィルム(a)の接着層と、フレキシブルプリント回路基板(FPC)の表面に形成されたテスト用回路パターンが転写された電解銅箔とを、当接するように重ね合わせて、これらを明星電気(株)製の熱プレス成形機(型式MS-HP2)を用いて以下の条件で熱プレス成形により一体化した。
プレス温度:120℃
プレス時間:10秒
プレス圧力:2kg/cm2
得られた電子部品用保護フィルム(a)とFPCとの積層体を、JIS C5016-10.5に準じて薬品中にそれぞれ5枚づつ5分間浸漬した後、目視によって異常の有無を確認した。なお、薬品は、酸として塩酸(2mol/l)、アルカリとして水酸化ナトリウム水溶液(2mol/l)及びアルコールとして2-プロパノールを使用した。結果を表4に示す。
カバーレイ染み出し量の評価
実験例16と同様にして、FPCと電子部品用保護フィルム(a)を一体化した積層体を製作した。この積層体を用いて、JPCA(Japan electronics Packaging and Circuits Association)BM-02の規格に準じる試験方法で、FPCのテスト回路パターンに設けられた各種の直径をもつ心円状の穴の内縁に染み出した接着剤の最大の長さを、(株)キーエンス製のデジタルマイクロスコープVH-6300を用いて測定した。なお、1種類の直径の穴に対して16点の測定を行い、その平均値を求め、この平均値をそれぞれの直径の穴に対する染み出し量とした。カバーレイとしての許容値は概ね300μm以下であることが好ましい。結果を表5に示す。
したがって、本発明の電子部品用保護フィルムをフレキシブルプリント基板やリジッドプリント基板などの回路基板、半導体装置、ICタグに用いた場合、接着層と金属箔等との接着性に優れることが推察される。このためこれらの電子部品用保護フィルムやカバーレイフィルムなどに好適に用いることができる。
(a)耐熱性樹脂を含む基材と、前記基材上に形成された、エチレン-不飽和カルボン酸共重合体またはその金属塩を含む接着層と、を備えることを特徴とする電子部品用保護フィルム。
(n)フレキシブルプリント配線基板であることを特徴とする(m)に記載の回路基板。
(p)アンテナを備える基材と、前記基材上に搭載されたICチップと、前記アンテナおよび前記ICチップを覆う、(a)乃至(h)のいずれかに記載の電子部品用保護フィルムと、を備えることを特徴とするICタグ。
Claims (14)
- 耐熱性樹脂を含む基材と、
前記基材上に形成された、エチレン-不飽和カルボン酸共重合体またはその金属塩を含む接着層と、を備え、
エチレン-不飽和カルボン酸共重合体またはその金属塩は、不飽和カルボン酸由来の構成単位を3~30重量%含むことを特徴とする電子部品用保護フィルム。 - エチレン-不飽和カルボン酸共重合体またはその金属塩において、エチレン-不飽和カルボン酸共重合体はエチレン-(メタ)アクリル酸共重合体であることを特徴とする請求項1に記載の電子部品用保護フィルム。
- エチレン-不飽和カルボン酸共重合体またはその金属塩において、金属塩を構成する金属陽イオンが、Na+,K+,Li+,Ca2+,Mg2+,Zn2+,Cu2+,Co2+,Ni2+,Mn2+およびAl3+よりなる群から選択される1種以上であることを特徴とする請求項1または2に記載の電子部品用保護フィルム。
- 前記接着層は、エチレン-不飽和カルボン酸共重合体またはその金属塩をTダイから押し出し成形することにより得られたものであることを特徴とする請求項1乃至3のいずれかに記載の電子部品用保護フィルム。
- エチレン-不飽和カルボン酸共重合体またはその金属塩のMFRが、0.1~100g/10分であることを特徴とする請求項1乃至4のいずれかに記載の電子部品用保護フィルム。
- 前記基材と前記接着層との間に、アンカーコート剤を含む層が設けられたことを特徴とする請求項1乃至5のいずれかに記載の電子部品用保護フィルム。
- 加熱されたエチレン-不飽和カルボン酸共重合体またはその金属塩をTダイから押し出してフィルムとし、該フィルムを前記基材上に貼り合わせることにより得られることを特徴とする請求項1乃至6のいずれかに記載の電子部品用保護フィルム。
- 不飽和カルボン酸由来の構成単位を3~30重量%含む、エチレン-不飽和カルボン酸共重合体またはその金属塩を加熱する工程と、
溶融したエチレン-不飽和カルボン酸共重合体またはその金属塩をTダイから押し出して成形されたフィルムを基材に貼り合わせて、該基材上にエチレン-不飽和カルボン酸共重合体またはその金属塩を含む接着層を形成する工程と、
を含むことを特徴とする電子部品用保護フィルムの製造方法。 - 前記接着層を形成する前記工程の前に、
前記基材の前記接着層が形成される面に、アンカーコート剤を塗布する工程を含むことを特徴とする請求項8に記載の電子部品用保護フィルムの製造方法。 - エチレン-不飽和カルボン酸共重合体またはその金属塩のMFRが、0.1~100g/10分であることを特徴とする請求項8または9に記載の電子部品用保護フィルムの製造方法。
- 請求項1乃至7のいずれかに記載の電子部品用保護フィルムが貼り付けられたことを特徴とする回路基板。
- フレキシブルプリント配線基板であることを特徴とする請求項11に記載の回路基板。
- 基板と、
前記基板上に搭載された半導体素子と、
前記半導体素子表面に貼り付けられた、請求項1乃至7のいずれかに記載の電子部品用保護フィルムと、
を備えることを特徴とする半導体装置。 - アンテナを備える基材と、
前記基材上に搭載されたICチップと、
前記アンテナおよび前記ICチップ表面に貼り付けられた、請求項1乃至7のいずれかに記載の電子部品用保護フィルムと、
を備えることを特徴とするICタグ。
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JP2010540338A JP4850309B2 (ja) | 2008-11-27 | 2009-11-20 | 電子部品用保護フィルム、その製造方法および用途 |
US13/130,292 US20110220728A1 (en) | 2008-11-27 | 2009-11-20 | Protective film for electronic component, method for manufacturing the same, and use thereof |
EP09828813A EP2360013A4 (en) | 2008-11-27 | 2009-11-20 | PROTECTIVE FILM FOR ELECTRONIC COMPONENT, METHOD OF MANUFACTURING SAME, AND USE OF SAID PROTECTIVE FILM |
CN2009801454348A CN102216075A (zh) | 2008-11-27 | 2009-11-20 | 电子部件用保护膜、其制造方法及用途 |
KR1020117011963A KR101258920B1 (ko) | 2008-11-27 | 2009-11-20 | 전자 부품용 보호 필름, 그 제조 방법 및 용도 |
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JP2014006630A (ja) * | 2012-06-22 | 2014-01-16 | Sato Holdings Corp | Rfidインレット、rfidインレットにおけるicチップの保護シール、およびrfidインレットにおけるicチップの保護シールの製造方法 |
JP2015066800A (ja) * | 2013-09-30 | 2015-04-13 | 大日本印刷株式会社 | 包装材用積層体 |
JPWO2018008657A1 (ja) * | 2016-07-08 | 2018-07-05 | 住友ベークライト株式会社 | 封止用フィルム、電子部品搭載基板の封止方法および封止用フィルム被覆電子部品搭載基板 |
WO2021125860A3 (ko) * | 2019-12-20 | 2021-08-05 | 주식회사 포스코 | 전기강판 접착 코팅 조성물, 전기강판 적층체 및 이의 제조 방법 |
WO2021125859A3 (ko) * | 2019-12-20 | 2021-08-05 | 주식회사 포스코 | 전기강판 접착 코팅 조성물, 전기강판 적층체 및 이의 제조 방법 |
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JP6599551B2 (ja) * | 2016-09-01 | 2019-10-30 | リケンテクノス株式会社 | 樹脂組成物、及びこれを用いた積層体 |
DE102017204659A1 (de) * | 2017-03-21 | 2018-09-27 | Robert Bosch Gmbh | Verfahren und Schichtanordnung zum Versiegeln von Bauteilen sowie versiegeltes Bauteil |
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CN102216075A (zh) | 2011-10-12 |
JP4850309B2 (ja) | 2012-01-11 |
KR101258920B1 (ko) | 2013-04-29 |
EP2360013A4 (en) | 2013-01-16 |
EP2360013A1 (en) | 2011-08-24 |
KR20110079754A (ko) | 2011-07-07 |
TW201029847A (en) | 2010-08-16 |
JPWO2010061563A1 (ja) | 2012-04-26 |
US20110220728A1 (en) | 2011-09-15 |
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