WO2021117398A1 - 電子部材固定用粘着シート - Google Patents
電子部材固定用粘着シート Download PDFInfo
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- WO2021117398A1 WO2021117398A1 PCT/JP2020/041731 JP2020041731W WO2021117398A1 WO 2021117398 A1 WO2021117398 A1 WO 2021117398A1 JP 2020041731 W JP2020041731 W JP 2020041731W WO 2021117398 A1 WO2021117398 A1 WO 2021117398A1
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- sensitive adhesive
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/04—Carbon
- C08K3/041—Carbon nanotubes
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D165/00—Coating compositions based on macromolecular compounds obtained by reactions forming a carbon-to-carbon link in the main chain; Coating compositions based on derivatives of such polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D179/00—Coating compositions based on macromolecular compounds obtained by reactions forming in the main chain of the macromolecule a linkage containing nitrogen, with or without oxygen, or carbon only, not provided for in groups C09D161/00 - C09D177/00
- C09D179/02—Polyamines
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/24—Electrically-conducting paints
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- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D7/00—Features of coating compositions, not provided for in group C09D5/00; Processes for incorporating ingredients in coating compositions
- C09D7/40—Additives
- C09D7/60—Additives non-macromolecular
- C09D7/61—Additives non-macromolecular inorganic
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- 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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- 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
- C09J4/00—Adhesives based on organic non-macromolecular compounds having at least one polymerisable carbon-to-carbon unsaturated bond ; adhesives, based on monomers of macromolecular compounds of groups C09J183/00 - C09J183/16
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- 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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
- C09J7/381—Pressure-sensitive adhesives [PSA] based on macromolecular compounds obtained by reactions involving only carbon-to-carbon unsaturated bonds
- C09J7/385—Acrylic polymers
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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
- C09J7/00—Adhesives in the form of films or foils
- C09J7/50—Adhesives in the form of films or foils characterised by a primer layer between the carrier and the adhesive
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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
- C09J2203/00—Applications of adhesives in processes or use of adhesives in the form of films or foils
- C09J2203/326—Applications of adhesives in processes or use of adhesives in the form of films or foils for bonding electronic components such as wafers, chips or semiconductors
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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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
- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/40—Additional features of adhesives in the form of films or foils characterized by the presence of essential components
- C09J2301/416—Additional features of adhesives in the form of films or foils characterized by the presence of essential components use of irradiation
Definitions
- the present invention relates to an adhesive sheet for fixing an electronic member used in a method for manufacturing an electronic member.
- An electronic member such as a semiconductor wafer or a package substrate (hereinafter, may be simply referred to as an "electronic member") is bonded to an adhesive sheet for fixing an electronic member after forming a circuit, and cut (diced) into small element pieces. It is moved to each process such as stretching (expanding) of the adhesive sheet and peeling (picking up) of element small pieces from the adhesive sheet.
- the adhesive sheet (dicing tape) used in these steps has sufficient adhesive strength to the element small pieces (chips) that are cut during dicing, and the adhesive strength is reduced to the extent that no adhesive remains during pickup. It is desirable to be there.
- the pressure-sensitive adhesive layer of the pressure-sensitive adhesive sheet may be cracked by pushing up the needle pin.
- the cracked pressure-sensitive adhesive layer adheres to the chip (adhesive residue), which causes contamination and a defect in the mounting process.
- one of the performances required of the adhesive sheet for fixing electronic members is that it has an excellent antistatic effect.
- the adhesive sheet for fixing electronic members is charged with static electricity, not only the electronic members such as semiconductor wafers are adversely affected, but also the adhesive sheet adsorbs dust existing in the vicinity and cutting powder generated during dicing. And contaminates the electronic components. Therefore, in order to suppress the influence of static electricity on the electronic member, various treatments are applied to the adhesive sheet for fixing the electronic member. Examples of such treatment include applying an antistatic treatment to the base film of the pressure-sensitive adhesive sheet in order to reduce the surface resistance value of the sheet surface, and applying an antistatic layer containing an antistatic material.
- an antistatic layer is provided on the base film, a part of the antistatic layer is lost due to various factors such as vibration during dicing, expanding, or picking up, and a change in the shape of the sheet. There is. If the antistatic layer is missing, the desired effect of reducing the surface resistance value may not be exhibited, or the pieces of the antistatic layer that have fallen off may become debris and cause contamination.
- an object of the present invention to provide an adhesive sheet for fixing an electronic member, which is less contaminated with electronic components and has an excellent effect of reducing the surface resistance value.
- the present invention employs the following means in order to solve the above problems.
- An antistatic layer having a base film and an adhesive layer formed on one surface side of the base film, and further containing an antistatic material on one side or both sides of the base film.
- It is an adhesive sheet for fixing an electronic member having An adhesive sheet for fixing an electronic member, which has an outer antistatic layer and an outer protective layer as the antistatic layer on the other surface side of the base film in this order.
- ⁇ 3> The electronic member fixing according to ⁇ 1> or ⁇ 2>, wherein the antistatic material contained in the outer antistatic layer is at least one of carbon nanotubes, metal oxides, polythiophene, polyaniline and polypyrrole.
- Adhesive sheet for. ⁇ 4> Further, the adhesive for fixing an electronic member according to any one of ⁇ 1> to ⁇ 3>, which has an inner antistatic layer as the antistatic layer between the base film and the pressure-sensitive adhesive layer.
- Sheet. ⁇ 5> The pressure-sensitive adhesive sheet for fixing electronic members according to ⁇ 4>, wherein the antistatic material contained in the inner antistatic layer is at least one of carbon nanotubes, metal oxides, polythiophene, polyaniline, and polypyrrole.
- ⁇ 6> The pressure-sensitive adhesive sheet for fixing an electronic member according to ⁇ 4> or ⁇ 5>, which has an inner protective layer between the pressure-sensitive adhesive layer and the inner antistatic layer.
- ⁇ 7> The electronic member fixing according to any one of ⁇ 1> to ⁇ 6>, wherein the base film contains at least one selected from a polyolefin resin, a polyester resin, and a copolymer thereof.
- Adhesive sheet for. ⁇ 8> The pressure-sensitive adhesive sheet for fixing an electronic member according to any one of ⁇ 1> to ⁇ 7>, wherein the pressure-sensitive adhesive layer contains an acrylic pressure-sensitive adhesive.
- ⁇ 9> The pressure-sensitive adhesive sheet for fixing an electronic member according to any one of ⁇ 1> to ⁇ 8>, wherein the pressure-sensitive adhesive layer contains an ultraviolet curable resin composition.
- an adhesive sheet for fixing an electronic member which is less contaminated of the electronic member and has an excellent effect of reducing the surface resistance value.
- Adhesive sheet for fixing electronic members includes a base film and one surface side (hereinafter, “adhesive surface side”) of the base film. Sometimes referred to. ), And further has an antistatic layer containing an antistatic material on one side or both sides of the base film, and the other side of the base film (hereinafter, hereinafter, The "outside”) has an outer antistatic layer and an outer protective layer in this order as the antistatic layer.
- a layer for example, a protective layer, an antistatic layer
- a protective layer for example, an antistatic layer
- an antistatic layer for example, an antistatic layer
- a protective layer for example, an antistatic layer
- FIG. 1 is a cross-sectional view showing a configuration example of the pressure-sensitive adhesive sheet of the present embodiment. Members common to each configuration will be described using a common number.
- the pressure-sensitive adhesive sheet of the present embodiment has at least an adhesive layer on the pressure-sensitive adhesive surface side of the base film, and at least an outer antistatic layer on the other surface side (outside) of the base film.
- the outer protective layer and the outer protective layer are provided in this order. That is, as shown in FIG. 1A, the adhesive sheet 100 includes a base film 20, and an adhesive layer 30 is provided on one surface side (adhesive surface side: above the paper surface), and the other. An outer antistatic layer 40 and an outer protective layer 50 are provided on the surface side (outside: below the paper surface). According to the pressure-sensitive adhesive sheet of the present embodiment, since the base film is provided with the outer antistatic layer, the surface resistance value of the surface of the pressure-sensitive adhesive sheet, particularly the outermost surface, can be lowered.
- the outer antistatic layer has defects such as cracks due to contact during handling of the base film and adhesive sheet, physical impact due to vibration during the dicing process, and force received by the shape change of the sheet during substrate picking. It is easy to occur. In particular, when the antistatic material contains carbon nanotubes, metal oxides, or the like, cracks in the antistatic layer are likely to occur. Further, when the base film or the pressure-sensitive adhesive sheet is handled, if the antistatic layer comes into contact with another member or the like and is damaged, the possibility that the antistatic layer is damaged increases. If the antistatic layer is defective in this way, the desired effect of reducing the surface resistance value may not be exhibited, or the pieces of the antistatic layer that have fallen off may become debris and cause contamination.
- the outer antistatic layer of the pressure-sensitive adhesive sheet of the present embodiment is provided with an outer protective layer on the outside of the base film. Therefore, the adhesive sheet of the present embodiment can prevent the antistatic layer from coming into contact with other members and being damaged when handling the base film and the like, and also during dicing and expanding. Alternatively, even if a crack or the like occurs in the antistatic layer due to vibration during pickup or a change in the shape of the sheet, it is possible to prevent the antistatic layer from falling off.
- the pressure-sensitive adhesive sheet of the present embodiment may have an inner antistatic layer containing an antistatic material between the base film and the pressure-sensitive adhesive layer.
- the adhesive sheet 200 includes a base film 20, and has an inner antistatic layer 42 and an adhesive layer 30 on one surface side (adhesive surface side: above the paper surface). And are provided in this order, and an outer antistatic layer 40 and an outer protective layer 50 are provided on the other surface side (outside: below the paper surface).
- the surface resistance value [ ⁇ / ⁇ ] of the adhesive surface is also related to one factor of chip skipping and chipping in the dicing process.
- the surface resistance value on the surface of the pressure-sensitive adhesive layer becomes high, the pressure-sensitive adhesive layer may not exhibit the desired adhesive force, which may cause chip skipping and the like.
- the inner antistatic layer is provided between the base film and the pressure-sensitive adhesive layer, the surface resistance value on the pressure-sensitive adhesive surface of the pressure-sensitive adhesive sheet can be effectively reduced in addition to the outermost surface. , Chip skipping and chipping occurrence during the dicing process can be suppressed.
- the effect of suppressing charge (peeling charge) at the time of chip peeling is improved as compared with the conventional adhesives and adhesive sheets having antistatic properties. It is possible to produce an adhesive sheet having excellent stability of adhesive strength and less contamination of electronic components (transfer of adhesive when the electronic components are attached and then peeled off).
- an adhesive sheet having an inner antistatic layer such as the adhesive sheet 200
- a base film having antistatic layers provided on both sides in advance can be used.
- the protective layer is formed not only on the outer antistatic layer but also on the antistatic layer corresponding to the inner antistatic layer.
- the pressure-sensitive adhesive sheet 200 is produced using a base film having an antistatic layer and a protective layer on both sides, only one side of the protective layer is removed from the base film, and an adhesive layer is applied to the removed surface.
- the adhesive sheet 300 includes a base film 20, and has an inner antistatic layer 42 and an inner protective layer 52 on one surface side (adhesive surface side: above the paper surface). And the adhesive layer 30 are provided in this order, and the outer antistatic layer 40 and the outer protective layer 50 are provided on the other surface side (outside: below the paper surface).
- each pressure-sensitive adhesive sheet may have a peelable protective film or the like to protect the pressure-sensitive adhesive surface of the pressure-sensitive adhesive layer during handling.
- the boundary between the antistatic layer and the protective layer does not necessarily have to be clear.
- the antistatic layer and the protective layer may be integrally formed. In this case, the distribution concentration of the antistatic material in the thickness direction of the layer is adjusted to enrich the content of the antistatic material on the substrate side, and the content of the antistatic material near the outer surface is reduced (preferably 0). By doing so, it is possible to form a layer having a function of an antistatic layer and a protective layer.
- the materials and the like constituting each layer will be described.
- the base film is not particularly limited, but various synthetic resin sheets used for manufacturing electronic members can be used.
- the material of the base film is not particularly limited, but at least one selected from polyolefin-based resins, polyester-based resins, and copolymers thereof can be used. Specifically, for example, polyvinyl chloride, polyethylene terephthalate, ethylene-vinyl acetate copolymer, ethylene-acrylic acid-acrylic acid ester film, ethylene-ethyl acrylate copolymer, polyethylene, polypropylene, propylene-based copolymer, etc.
- Examples include ethylene-acrylic acid copolymers, and ionoma resins in which metal ions are bonded to ethylene- (meth) acrylic acid copolymers, ethylene- (meth) acrylic acid- (meth) acrylic acid ester copolymers, and the like. Be done.
- the base film may be a mixture or copolymer of these resins.
- the ionomer resin includes Na + , K + , and Zn 2 in a copolymer having an ethylene unit, a (meth) methacrylic acid unit, and a (meth) acrylic acid alkyl ester unit from the viewpoint of suppressing cutting chips during dying.
- An ionomer resin to which a metal ion such as + is bonded can be preferably used.
- the molding method of the base film is not particularly limited, and examples thereof include a calendar, T-die extrusion, inflation, and casting.
- the base film may be a single-layer or multi-layer film or sheet containing the above-mentioned materials, or may be a laminated film or the like made of different materials.
- the thickness of the base film is preferably 50 to 200 ⁇ m, more preferably 70 to 150 ⁇ m.
- the base film may be antistatic treated.
- the antistatic treatment include a treatment of blending an antistatic material with a base film, a treatment by corona discharge, and the like.
- the pressure-sensitive adhesive layer is a layer to which an electronic member such as a conductor wafer or a package substrate is bonded to each other during a dicing step or the like to fix the electronic member.
- the pressure-sensitive adhesive contained in the pressure-sensitive adhesive layer is not particularly limited, and for example, a rubber-based pressure-sensitive adhesive, an acrylic-based pressure-sensitive adhesive, a urethane-based pressure-sensitive adhesive, a silicone-based pressure-sensitive adhesive, or the like can be used. Since the ultraviolet curable pressure-sensitive adhesive layer is preferable in this embodiment, it is preferable to use an acrylic pressure-sensitive adhesive.
- the UV curable pressure-sensitive adhesive layer is cured by UV light irradiation.
- the pressure-sensitive adhesive layer When the pressure-sensitive adhesive layer is cured, the elastic modulus of the layer is increased, so that the adhesive strength is reduced and the shape of the pressure-sensitive adhesive layer itself is changed (shrinked). Therefore, when the pressure-sensitive adhesive layer is irradiated with ultraviolet rays after dicing, the chips can be easily peeled off due to a decrease in adhesive strength or the like.
- the ultraviolet curable resin composition using an acrylic pressure-sensitive adhesive include those containing a (meth) acrylic acid ester copolymer, a photopolymerizable compound, a curing agent, and a photopolymerization initiator.
- the acrylic pressure-sensitive adhesive is not particularly limited, and examples thereof include an acrylic acid ester polymer.
- a compound containing (meth) such as (meth) acrylic acid is a general term for a compound having "meta" in the name and a compound having no "meta”.
- Examples of the (meth) acrylic acid ester copolymer include a monomer having a carboxyl group such as (meth) acrylic acid, a polymer obtained by polymerizing the ester monomer thereof, and an unsaturated monomer copolymerizable with these monomers (for example, Examples thereof include copolymers obtained by copolymerizing vinyl acetate, styrene, and acrylonitrile.
- Examples of the monomer having a carboxyl group include methacrylic acid, crotonic acid, maleic acid, itaconic acid, fumaric acid, acrylamideN-glycolic acid, cinnamic acid and the like, and methacrylic acid is preferable.
- Acrylic acid is particularly preferable because the adhesive strength can be adjusted more precisely by containing a curing agent.
- Examples of the ester monomer of the (meth) acrylic polymer include butyl (meth) acrylate, 2-butyl (meth) acrylate, t-butyl (meth) acrylate, pentyl (meth) acrylate, octyl (meth) acrylate, and 2-.
- the weight average molecular weight of the (meth) acrylic acid ester polymer is preferably 200,000 to 2,000,000 from the viewpoint of suppressing excessive decrease and increase of the elastic modulus and preventing the occurrence of chipping during dicing.
- the photopolymerizable compound is not particularly limited, but for example, a urethane acrylate oligomer can be used.
- the urethane acrylate oligomer is obtained by reacting, for example, a polyhydric isocyanate having an acryloyloxy group or a methylenedioxy group with a (meth) acrylate having a hydroxy group.
- polyisocyanate compound examples include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,3-xylene diisocyanate, 1,4-xylene diisocyanate, diphenylmethane 4,4-diisocyanate, and trimethylhexamethylene diisocyanate. , Hexamethylene diisocyanate, isophorone diisocyanate and the like are used.
- Examples of the (meth) acrylate having a hydroxy group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, polyethylene glycol (meth) acrylate, pentaerythritol triacrylate, and glycidoldi (meth). Acrylate, dipentaerythritol monohydroxypentaacrylate and the like are used.
- the content of the photopolymerizable compound in the pressure-sensitive adhesive layer is not particularly limited, but the adhesive has an excessive elastic modulus in the light irradiation step and the occurrence of poor pickup of the semiconductor chip due to the deterioration of the peelability of the pressure-sensitive adhesive sheet after light irradiation.
- the amount is preferably 20 to 150 parts by mass, more preferably 50 to 120 parts by mass with respect to 100 parts by mass of the (meth) acrylic acid ester copolymer.
- the photopolymerizable compound is not particularly limited, but has a weight average molecular weight of 500 to 500 or more from the viewpoint of generation of adhesive residue on the chip due to the adhesive being scraped up during dicing and curing of the adhesive after irradiation with ultraviolet rays or the like. It is preferably 100,000, and it is preferable to have at least one or more of either an acryloyl group or a methacryloyl group, and a total of 4 to 10 groups.
- Examples of the curing agent include a polyfunctional isocyanate curing agent, a polyfunctional epoxy curing agent, an azirine compound, and a melamine compound.
- Examples of the polyfunctional isocyanate curing agent include an aromatic polyisocyanate curing agent, an aliphatic polyisocyanate curing agent, and an alicyclic polyisocyanate curing agent, and are generally used as an adduct type in a dimer or more.
- the aromatic polyisocyanate is not particularly limited, and for example, 1,3-phenylenediisocyanate, 4,4'-diphenyldiisocyanate, 1,4-phenylenediocyanate, 4,4'-diphenylmethanediisocyanate, 2,4-tolylene diisocyanate, 2 , 6-Tolylene diisocyanate, 4,4'-toluidin diisocyanate, 2,4,6-triisocyanate toluene, 1,3,5-triisocyanate benzene, dianisidine diisocyanate, 4,4'-diphenyl ether diisocyanate, 4,4 ', 4'-Triphenylmethane triisocyanate, ⁇ , ⁇ '-diisocyanate-1,3-dimethylbenzene, ⁇ , ⁇ '-diisocyanate-1,4-dimethylbenzene, ⁇ , ⁇ '-diisocyanate-1,4- Examples
- the aliphatic polyisocyanate is not particularly limited, and for example, trimethylene diisocyanate, tetramethylene diisocyanate, hexamethylene diisocyanate, pentamethylene diisocyanate, 1,2-propylene diisocyanate, 2,3-butylene diisocyanate, 1,3-butylene diisocyanate, dodecamethylene. Examples thereof include diisocyanate and 2,4,4-trimethylhexamethylene diisocyanate.
- the alicyclic polyisocyanate is not particularly limited, and for example, 3-isocyanate methyl-3,5,5-trimethylcyclohexylisocyanate, 1,3-cyclopentanediisocyanate, 1,3-cyclohexanediisocyanate, 1,4-cyclohexanediisocyanate, methyl. -2,4-Cyclohexanediisocyanate, methyl-2,6-cyclohexanediisocyanate, 4,4'-methylenebis (cyclohexylisocyanate), 1,4-bis (isocyanatemethyl) cyclohexane, and 1,4-bis (isocyanatemethyl) cyclohexane There is.
- polyisocyanates 1,3-phenylenediocyanate, 4,4'-diphenyldiisocyanate, 1,4-phenylenediocyanate, 4,4'-diphenylmethane diisocyanate, 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate , 4,4'-Toluene diisocyanate and hexamethylene diisocyanate are preferably used.
- the polyfunctional epoxy curing agent mainly refers to a compound having two or more epoxy groups and one or more tertiary nitrogen atoms, and refers to NN-glycidyl aniline, NN-glycidyl toluidin, m-N-N-.
- Glycidylaminophenyl glycidyl ether p-N ⁇ N-glycidyl aminophenyl glycidyl ether, triglycidyl isocyanurate, N ⁇ N ⁇ N' ⁇ N'-tetraglycidyldiaminodiphenylmethane, N ⁇ N ⁇ N' ⁇ N'-tetraglycidyl -M-Xylylene diamine, N, N, N', N', N "-pentaglycidyldiethylenetriamine and the like can be mentioned.
- the content of the curing agent in the pressure-sensitive adhesive layer shall be 1 to 20 parts by mass with respect to 100 parts by mass of the (meth) acrylic acid ester copolymer from the viewpoint of suppressing the generation of adhesive residue and the lack of adhesive strength. Is preferable, and 1.5 to 15 parts by mass is more preferable.
- photopolymerization initiator benzoins, benzoin alkyl ethers, acetophenones, anthraquinones, thioxanthones, ketals, benzophenones, xanthones and the like are used.
- benzoin include benzoin, benzoin methyl ether, benzoin ethyl ether, benzoin propyl ether and the like.
- acetophenones include benzoin alkyl ethers, acetophenone, 2,2-dimethoxy-2-acetophenone, 2,2-diethoxy-2-acetophenone, 1,1-dichloroacetophenone and the like.
- anthraquinones examples include 2-methylanthraquinone, 2-ethylanthraquinone, 2-tershalibutyl anthraquinone, 1-chloroanthraquinone and the like.
- thioxanthones examples include 2,4-dimethylthioxanthone, 2,4-diisopropylthioxanthone, 2-chlorothioxanthone, 2,4-diisopropylthioxanthone and the like.
- ketals include acetophenone dimethyl ketal, benzyl dimethyl metall, benzyl diphenylsulfide, tetramethylthiuram monosulfide, azobisisobutyronitrile, dibenzyl, diacetyl, ⁇ -chloranthraquinone and the like.
- the content of the photopolymerization initiator in the pressure-sensitive adhesive layer is a (meth) acrylic acid ester polymer from the viewpoint of suppressing peelability from the pressure-sensitive adhesive sheet after light irradiation and bleeding out of the photopolymerization initiator to the surface of the pressure-sensitive adhesive layer. It is 1 to 15 parts by mass with respect to 100 parts by mass, more preferably 1.5 to 10 parts by mass.
- photopolymerization initiator one or a combination of two or more conventionally known photopolymerization accelerators may be used in combination, if necessary.
- a photopolymerization accelerator a benzoic acid-based agent, a tertiary amine, or the like can be used.
- the tertiary amine include triethylamine, tetraethylpentamine, dimethylamino ether and the like.
- a terpene phenol resin completely or partially hydrolyzed with a terpene phenol resin may be added to the pressure-sensitive adhesive layer as a tackifier resin. Further, various additives such as a softening agent, an antiaging agent, a filler, a conductive agent, an ultraviolet absorber, and a light stabilizer may be added to the pressure-sensitive adhesive layer, if necessary.
- the thickness of the pressure-sensitive adhesive layer is not particularly limited, but 1 to 50 ⁇ m is preferable from the viewpoint of chip retention during dicing by ensuring the adhesive strength and prevention of chipping due to the thickness of the pressure-sensitive adhesive layer. 5 to 30 ⁇ m is more preferable.
- the adhesion between the pressure-sensitive adhesive layer and the member immediately below for example, the adhesion between the pressure-sensitive adhesive layer / base film, the pressure-sensitive adhesive layer / inner antistatic layer, and the pressure-sensitive adhesive layer / inner protective layer (anchor property [unit: unit:: N / 20 mm]) is not particularly limited, but is preferably 1N / 20 mm or more, and more preferably 6N / 20 mm or more, from the viewpoint of adhesive residue after tape peeling.
- the anchor property can be measured by the method described in Examples.
- the antistatic layer is a layer containing an antistatic material.
- an inner antistatic layer can be formed in addition to the outer antistatic layer.
- the antistatic material is not particularly limited, but at least one of carbon nanotubes, metal oxides, polythiophene, polyaniline and polypyrrole is preferable.
- the carbon nanotubes, metal oxides, polythiophenes, polyanilines and polypyrroles are not particularly limited as long as they are used as an antistatic material (conductive material), and known ones can be appropriately selected and used. Further, as these antistatic materials, carbon nanotubes are particularly preferable from the viewpoint of antistatic effect. Similar antistatic materials can be used for the outer antistatic layer and the inner antistatic layer, and both layers may be formed of the same material or may be formed of different materials. Good.
- the carbon nanotube (hereinafter, may be simply referred to as “CNT”) may be either a single-walled carbon nanotube (SWCNT) or a multi-walled carbon nanotube (MWCNT).
- SWCNT single-walled carbon nanotube
- MWCNT multi-walled carbon nanotube
- the MWCNT is formed by stacking tubes made of a plurality of cylindrical carbon walls having different diameters in multiple layers around the central axis, and the carbon walls are formed in multiple layers in a hexagonal network structure of carbon or in a spiral shape.
- the MWCNT preferably has 2 to 30 layers of carbon walls, and more preferably 2 to 15 layers.
- the carbon nanotubes may be dispersed one by one in the antistatic layer, or may be dispersed in a bundle of a plurality of carbon nanotubes.
- a binder may be used together with an antistatic material such as carbon nanotubes.
- the binder is not particularly limited, and is, for example, a (meth) acrylic acid ester-based polymer, an acrylic-based polymer, a urethane-based polymer, a polyester-based polymer, an epoxy-based polymer, a polyvinyl chloride-based polymer, and a melanin-based heavy weight. Examples thereof include coalescence, polyimide-based polymer, silicone-based polymer, and the like, and (meth) acrylic acid ester-based polymer is preferable.
- the (meth) acrylic acid ester-based polymer include the same as the (meth) acrylic acid ester-based polymer used in the above-mentioned pressure-sensitive adhesive layer.
- the content of carbon nanotubes and the like in the antistatic layer is not particularly limited, but the strength of the antistatic layer (for example, crack resistance, etc.), adhesion to the base film, and sufficient antistatic effect are exhibited.
- the content of carbon nanotubes in the antistatic layer after drying can be about 5 to 20 mg / m 2 , preferably 7 to 11 mg / m 2.
- the antistatic layer is a known antistatic material (for example, dimethylaminoethyl (meth) acrylate quaternary chloride, diethylaminoethyl (meth) acrylate quaternary chloride, methylethylaminoethyl) as long as the effect of the present invention is not impaired.
- (Meta) acrylate quaternary chloride, p-dimethylaminostyrene quaternary chloride, p-diethylaminostyrene quaternary chloride, etc.) may be contained. If necessary, various additives such as a curing agent, a plasticizer, an antioxidant, a filler, and the like may be appropriately added to the antistatic layer as long as the effects of the present invention are not impaired.
- the method of forming the antistatic layer is not particularly limited, and for example, a method of directly applying the antistatic layer on the base film with a coater such as a gravure coater, a bar coater, a knife coater, or a roll coater, or convex plate printing or concave plate printing. , Flat plate printing, flexographic printing, offset printing, screen printing, or the like.
- a coater such as a gravure coater, a bar coater, a knife coater, or a roll coater, or convex plate printing or concave plate printing.
- a coater such as a gravure coater, a bar coater, a knife coater, or a roll coater, or convex plate printing or concave plate printing.
- a coater such as a gravure coater, a bar coater, a knife coater, or a roll coater, or convex plate printing or concave plate printing.
- the thickness of the outer antistatic layer is not particularly limited, but 0.01 from the viewpoint of the strength of the antistatic layer (for example, crack resistance, etc.), the adhesion to the base film, and the sufficient antistatic effect. It is preferably ⁇ 1 ⁇ m, more preferably 0.02 to 0.2 ⁇ m.
- the thickness of the inner antistatic layer is not particularly limited, but is 0 from the viewpoints of strength of the antistatic layer (for example, crack resistance, etc.), adhesion to the base film, and sufficient antistatic effect. It is preferably 0.01 to 1 ⁇ m, more preferably 0.02 to 0.2 ⁇ m.
- the protective layer is a layer provided to protect the antistatic material.
- the inner protective layer can be formed in addition to the outer protective layer.
- the outer protective layer is a layer whose main purpose is to prevent the antistatic layer from falling off during the dicing process. Further, both the inner layer and the outer protective layer can suppress damage such as physical impact at the time of handling the base film, for example, and can prevent the antistatic layer from falling off. Further, the pressure-sensitive adhesive sheet for an electronic member provided with an inner protective layer is excellent in the adhesive strength retention rate of the pressure-sensitive adhesive layer even when stored for a certain period of time under a relatively high temperature condition.
- the protective layer preferably does not have tackiness.
- the probe tack (according to ASTM D 2979) is preferably 0.1 N / 20 mm 2 or less.
- the outer protective layer and the inner protective layer may be layers formed of the same material as both layers, or may be layers formed by using different materials. When the inner protective layer and the outer protective layer are formed of different materials, it is preferable that at least the outer protective layer does not have tackiness.
- the material (binder) constituting the outer protective layer is not particularly limited, and for example, (meth) acrylic acid ester-based polymer, acrylic-based polymer, urethane-based polymer, polyester-based polymer, epoxy-based polymer, etc.
- examples thereof include a polyvinyl chloride-based polymer, a melanin-based polymer, a polyimide-based polymer, and a silicone-based polymer, and a (meth) acrylic acid ester-based polymer is preferable.
- the (meth) acrylic acid ester-based polymer the (meth) acrylic acid ester-based polymer used for the above-mentioned pressure-sensitive adhesive layer can be used.
- the material (binder) constituting the inner protective layer is also not particularly limited, but in consideration of the adhesion to the pressure-sensitive adhesive layer formed of the ultraviolet curable resin containing the acrylic pressure-sensitive adhesive, the water-based olefin resin and the acrylic polymer are used. It is preferable to use it.
- the acrylic polymer is not particularly limited, and examples thereof include polymethacrylic acid ester, polyacrylic acid ester, sodium polyacrylate, polyacrylonitrile, and polyacrylamide, and specifically, polymethylmethacrylate is preferable.
- a friction reducing agent can be used for the protective layer (particularly, the outer protective layer).
- a friction reducing agent When a friction reducing agent is used, the coefficient of friction between the pressure-sensitive adhesive sheet and the expanding device can be reduced.
- the friction reducing agent include silicone compounds such as silicone resin and (modified) silicone oil, fluororesin, hexagonal boron nitride, carbon black, molybdenum disulfide, etc., and have compatibility with the antistatic layer.
- a silicone-based graft copolymer is preferable from the viewpoint of a good balance between antistatic property and expandable property.
- the silicone-based graft copolymer includes a monomer having a vinyl group such as a (meth) acryloyl group or a styryl group at the end of the silicone molecular chain (hereinafter referred to as “silicone-based monomer”) and (meth) acrylic.
- a monomer having a vinyl group such as a (meth) acryloyl group or a styryl group at the end of the silicone molecular chain
- silicone-based monomer examples thereof include a system monomer, a vinyl polymer obtained by polymerizing a monomer having a vinyl group such as styrene, and the like (see, for example, JP-A-2000-080135).
- the amount of the friction reducing agent blended in the outer protective layer is not particularly limited, but from the viewpoint of sufficiently expanding the adhesive sheet and not impairing the antistatic effect, it is 0.005 to 10 parts by mass with respect to 100 parts by mass of the binder. It is preferable to do so.
- additives such as a curing agent, a plasticizer, an antiaging agent, a filler, and the like may be appropriately added to the protective layer as long as the effects of the present invention are not impaired.
- the method of forming the protective layer is not particularly limited, and for example, a method of applying directly onto the base film with a coater such as a gravure coater, a bar coater, a knife coater, or a roll coater, convex plate printing, concave plate printing, etc. Examples thereof include a method of printing by flat plate printing, flexographic printing, offset printing, screen printing and the like. As a method for forming the protective layer, a method using a gravure coater is particularly preferable.
- the thickness of the outer protective layer is not particularly limited, but is preferably 0.1 to 5 ⁇ m, more preferably 0.5 to 2 ⁇ m, from the viewpoint of the strength of the protective layer and the antistatic effect.
- the thickness of the inner protective layer is not particularly limited, but is preferably 0.1 to 5 ⁇ m, more preferably 0.5 to 2 ⁇ m, from the viewpoint of the strength of the protective layer and the antistatic effect.
- the outer protective layer is preferably the outermost layer on the outside of the adhesive sheet.
- the outermost surface of the adhesive sheet may be embossed.
- the surface of the outer protective layer can be, for example, an embossed surface having an average surface roughness (Ra) of 0.3 to 1.5 ⁇ m.
- the surface resistance value of the pressure-sensitive adhesive sheet of the present embodiment can be measured by using an electrometer or the like according to, for example, JIS-K6911.
- the pressure-sensitive adhesive sheet of the present embodiment preferably has a surface resistance value of at least one surface of 1 ⁇ 10 7 ⁇ / ⁇ or less.
- the surface resistance value of the outermost outer surface of the pressure-sensitive adhesive sheet is not particularly limited, but is preferably 1 ⁇ 10 7 ⁇ / ⁇ or less from the viewpoint of suppressing peeling charge of the tape.
- the surface resistance value of the adhesive surface side (adhesive layer) surface of the adhesive sheet is not particularly limited, but is preferably 1 ⁇ 10 10 ⁇ / ⁇ or less from the viewpoint of suppressing peeling charge of the tape.
- the method for producing the pressure-sensitive adhesive sheet of the present embodiment is not particularly limited, and each layer can be produced on the base film by using the above-mentioned method.
- the antistatic layer and the protective layer are formed in this order on only one side of the base film, and the pressure-sensitive adhesive layer is provided on the opposite side. Can be done.
- the pressure-sensitive adhesive sheet 200 shown in FIG. 1B can be produced by forming an inner antistatic layer before providing the pressure-sensitive adhesive layer and providing the pressure-sensitive adhesive layer on the inner antistatic layer. it can.
- the pressure-sensitive adhesive sheet 200 can also be produced by using a base film having an antistatic layer and a protective layer on both sides, removing the protective layer on only one side, and providing an adhesive layer on the removed surface. Further, the pressure-sensitive adhesive sheet 300 shown in FIG. 1C can be produced by using a base film having an antistatic layer and a protective layer on both sides and providing an adhesive layer on one of the protective layers.
- the pressure-sensitive adhesive sheet of the present embodiment may have a peelable protective film on the pressure-sensitive adhesive layer. Further, the pressure-sensitive adhesive sheet of the present embodiment may have another layer between each layer as long as the effect of the present invention is not impaired, but from the viewpoint of adhesion of each layer, FIGS. 1 (A) to 1 (A).
- Each of the pressure-sensitive adhesive sheets shown in C) is preferably a pressure-sensitive adhesive sheet laminated so that each layer is in direct contact with each other.
- the method for manufacturing the electronic member using the pressure-sensitive adhesive sheet of the present embodiment is not particularly limited, and examples thereof include a manufacturing method including the following procedure.
- the pressure-sensitive adhesive sheet is stuck to an electronic member such as a semiconductor wafer or a package substrate and a ring frame.
- the semiconductor wafer may be a conventional general-purpose wafer such as a silicon wafer, a gallium nitride wafer, a silicon carbide wafer, or a sapphire wafer.
- the package substrate may be a general-purpose substrate such as a package substrate in which a chip is sealed with a resin, an LED package substrate, or a ceramic substrate.
- the photocurable pressure-sensitive adhesive layer is irradiated with active rays such as ultraviolet rays from the base film side.
- active rays such as ultraviolet rays from the base film side.
- a light source of ultraviolet rays a low-pressure mercury lamp, a high-pressure mercury lamp, an ultra-high-pressure mercury lamp, a metal halide lamp, and a black light can be used.
- an electron beam may be used instead of the ultraviolet ray, and ⁇ ray, ⁇ ray, and ⁇ ray can be used as the light source of the electron beam.
- the pressure-sensitive adhesive layer is three-dimensionally networked and hardened by light irradiation, and the adhesive strength of the pressure-sensitive adhesive layer is reduced.
- the adhesive sheet is stretched to widen the distance between semiconductor chips, and the chips or parts are pushed up with needle pins or the like. After that, the chip or component is adsorbed by a vacuum collet or air tweezers, peeled from the adhesive layer of the adhesive sheet, and picked up.
- the adhesive sheet for fixing the electronic member in Examples and Comparative Examples was manufactured by the following formulation. Specifically, a solution obtained by diluting the following acrylic UV adhesive with a solvent (toluene) is applied to a release film (product name: E7002 (manufactured by Toyobo Co., Ltd.)), the solvent is dried in a drying furnace, and then both sides are used. The following antistatic layer and protective layer were laminated with the following base film provided in this order to prepare an adhesive sheet for fixing an electronic member of the example. In the comparative example, a base film without a protective layer was used. In addition, each measurement was performed on the adhesive sheet for fixing the electronic member in Examples and Comparative Examples.
- the prescription and measurement method for each layer in the table are as follows.
- Adhesive layer -Adhesive layer A (dry film thickness 10 ⁇ m): Acrylic UV adhesive A (main component 2-ethylhexyl acrylate (2-EHA), methyl acrylate (MA), 2-hydroxyethyl acrylate (2-HEA), Acrylic acid (AA), pentaerythritol triacrylate, isophorone diisocyanate (IPDI), trimethylrol propane (TMP), toluene diisocyanate (TDI)) -Adhesive layer B (dry film thickness 10 ⁇ m): Acrylic UV adhesive B (main component dimethylacrylamide (others, 2-hydroxyethyl methacrylate (2-HEMA), ethyl acrylate (EA), butyl acrylate (BA) ), Diethylhexyl acrylate (2-EHA), glycidylmethacrylate (GMA), pentaerythritol tri and tetraacrylate (PETA))
- Base film -Base material A (thickness 150 ⁇ m): Ionoma film (product name: Hymilan (registered trademark) (manufactured by Mitsui / DuPont Polychemical Co., Ltd.))
- Base material B (thickness 150 ⁇ m): PO film (polypropylene (10 ⁇ m) / polyethylene (130 ⁇ m) / polypropylene (10 ⁇ m) three-layer structure film)
- Antistatic layer Dry film thickness of both inner and outer antistatic layers: less than 1 ⁇ m ⁇
- Antistatic layer A Carbon nanotubes (content in dry film thickness: 8 to 10 g / m 2 ): Single-walled carbon nanotubes
- Binder Polymethyl methacrylate resin
- antistatic layer B Quaternary ammonium (antistatic material)
- Binder Polymethyl methacrylate resin
- antistatic layer C PEDOT: Poly (3,4-ethylenedioxythiophene)
- the probe tack of the outer protective layer was measured using a probe tack tester TA500 manufactured by UBM Co., Ltd. in a room at room temperature of 23 ⁇ 2 ° C. and humidity of 50 ⁇ 2%.
- the measurement conditions were a pressing time of 1 second, a load of 400 gf / cm 2 , and a probe peeling speed of 10 mm / sec. The results are shown in the table.
- a load is applied in the direction of (tensile speed 300 mm / min, room temperature 23 ⁇ 2 ° C.), and the strength when the adhesive layer is completely peeled off or the strength when the adhesive layer is peeled off between the strong adhesive tape and the adhesive is measured. , The anchoring property between the adhesive layer / inner protective layer (or inner antistatic layer or base film) was evaluated.
- the anchoring properties of the pressure-sensitive adhesive layer / inner protective layer of the pressure-sensitive adhesive sheets for fixing electronic members of Examples 4 and 5 are all the pressure-sensitive adhesive layer / of the sheet of the comparative example having no inner protective layer.
- the evaluation was equal to or better than the anchoring property between the inner antistatic layer or the base film.
- Adhesive sheet 100, 200, 300 ... Adhesive sheet, 20 ... Base film, 30 ... Adhesive layer, 40 ... Outer antistatic layer, 42 ... Inner antistatic layer, 50 ... Outer protective layer, 52 ... Inner protective layer
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Abstract
Description
<1> 基材フィルムと、前記基材フィルムの一方の面側に形成された粘着剤層と、を有し、さらに前記基材フィルムの片面側又は両面側に帯電防止材を含む帯電防止層を有する電子部材固定用粘着シートであって、
前記基材フィルムの他方の面側に、前記帯電防止層として外側帯電防止層と、外側保護層と、をこの順で有する電子部材固定用粘着シート。
<2> 少なくとも一方の表面の表面抵抗値が1×107Ω/□以下である前記<1>に記載の電子部材固定用粘着シート。
<3> 前記外側帯電防止層に含まれる前記帯電防止材が、カーボンナノチューブ、金属酸化物、ポリチオフェン、ポリアニリン及びポリピロールのうち少なくとも1種である前記<1>又は<2>に記載の電子部材固定用粘着シート。
<4> さらに、前記基材フィルムと前記粘着剤層との間に、前記帯電防止層として内側帯電防止層を有する前記<1>~前記<3>のいずれかに記載の電子部材固定用粘着シート。
<5> 前記内側帯電防止層に含まれる前記帯電防止材が、カーボンナノチューブ、金属酸化物、ポリチオフェン、ポリアニリン及びポリピロールのうち少なくとも1種である前記<4>に記載の電子部材固定用粘着シート。
<6> さらに、前記粘着剤層と前記内側帯電防止層との間に、内側保護層を有する前記<4>又は<5>に記載の電子部材固定用粘着シート。
<7> 前記基材フィルムが、ポリオレフィン系樹脂、ポリエステル系樹脂及びこれらの共重合体から選ばれる少なくとも1種を含む前記<1>~前記<6>のいずれか一項に記載の電子部材固定用粘着シート。
<8> 前記粘着剤層が、アクリル系粘着剤を含む前記<1>~前記<7>のいずれかに記載の電子部材固定用粘着シート。
<9> 前記粘着剤層が、紫外線硬化樹脂組成物を含む前記<1>~前記<8>のいずれかに記載の電子部材固定用粘着シート。
本実施形態の電子部材固定用粘着シート(以下、単に「粘着シート」と称することがある)は、基材フィルムと、前記基材フィルムの一方の面側(以下、「粘着面側」)と称することがある。)に形成された粘着剤層と、を有し、さらに前記基材フィルムの片面側又は両面側に帯電防止材を含む帯電防止層を有し、前記基材フィルムの他方の面側(以下、「外側」と称することがある)に、前記帯電防止層として外側帯電防止層と、外側保護層と、をこの順で有する。また、本実施形態においては、後述するように、基材フィルムの一方の面側(粘着面側)において基材フィルムと粘着剤層との間に設けられる層(例えば、保護層、帯電防止層)を、各々「内側保護層」、及び「内側帯電防止層」と称する。
なお、以下において、外側帯電防止層及び内側帯電防止層を総じて、単に「帯電防止層」と称することがある。同様に、外側保護層及び内側保護層を総じて、単に「保護層」と称することがある。
図1を用いて本実施形態の粘着シートの層構成について説明する。図1は、本実施形態の粘着シートの構成例を示す断面図である。各構成において共通する部材については共通の番号を用いて説明する。
本実施形態の粘着シートによれば、基材フィルムに外側帯電防止層が設けられているため、粘着シート表面、特に、外側最表面の表面抵抗値を低くすることができる。
さらに、粘着シートの粘着面における表面抵抗値を低減させると、従来の帯電防止性を与えた粘着剤及び粘着シートに比して、チップ剥離時における帯電(剥離帯電)の抑制効果が向上し、粘着力の安定化に優れ、電子部品の汚染(電子部品を貼り付けてから剥離した際の粘着剤の移行)が少ない粘着シートを作製することができる。
例えば、両面に帯電防止層と保護層とを有する基材フィルムを用いて粘着シート200を作製する場合には、片側の保護層のみを基材フィルムから除去し、当該除去面に粘着剤層を設けることで、粘着シート200を作製することができる。
この場合、図1(C)に示すように、粘着シート300は、基材フィルム20を備え、一方の面側(粘着面側:紙面上方)に、内側帯電防止層42と、内側保護層52と、粘着剤層30と、がこの順で設けられており、他方の面側(外側:紙面下方)には、外側帯電防止層40と、外側保護層50とが設けられている。
さらに、上述の各層構成においては帯電防止層と保護層とが別々に作製される例について説明されているが、帯電防止層と保護層とは、各層の境界が必ずしも明確でなくてもよい。例えば、帯電防止層と保護層とが一体的に形成されていてもよい。この場合、当該層の厚み方向における帯電防止材の分布濃度を調整して基板側における帯電防止材の含有量をリッチにし、外側表面付近の帯電防止層の含有量を少なく(好ましくは0)とすることで、帯電防止層と保護層との機能を備えた層を形成することができる。
以下、各層を構成する材料等について説明する。
基材フィルムとしては、特に限定はないが、電子部材作製用途に用いられる各種合成樹脂製のシートを使用することができる。基材フィルムの素材としては、特に限定はないが、ポリオレフィン系樹脂、ポリエステル系樹脂及びこれらの共重合体から選ばれる少なくとも1種を用いることができる。具体的には、例えば、ポリ塩化ビニル、ポリエチレンテレフタレート、エチレン-酢酸ビニル共重合体、エチレン-アクリル酸-アクリル酸エステルフィルム、エチレン-エチルアクリレート共重合体、ポリエチレン、ポリプロピレン、プロピレン系共重合体、エチレン-アクリル酸共重合体、及び、エチレン-(メタ)アクリル酸共重合体やエチレン-(メタ)アクリル酸-(メタ)アクリル酸エステル共重合体等に金属イオンが結合したアイオノマ樹脂などが挙げられる。基材フィルムは、これら樹脂の混合物又は共重合体であってもよい。
粘着剤層は、ダイシング工程等の際に、導体ウエハ又はパッケージ基板などの電子部材が貼合され、電子部材を固定する役割を有する層である。粘着剤層に含まれる粘着剤は、特に限定されないが、例えば、ゴム系粘着剤、アクリル系粘着剤、ウレタン系粘着剤、シリコーン系粘着剤等を使用することができる。本実施形態では紫外線硬化型粘着剤層が好ましいため、アクリル系粘着剤を用いるのが好ましい。UV硬化型の粘着剤層は、UV光照射によって硬化する。粘着剤層が硬化すると、当該層の弾性率が高くなるためその粘着力が低下するとともに、粘着剤層自体が形状変化(収縮)する。このため、ダイシング後に紫外線を粘着剤層に照射すると、粘着力の低下等によって、チップの剥離が容易となる。アクリル系粘着剤を用いた紫外線硬化樹脂組成物としては、例えば(メタ)アクリル酸エステル共重合体と、光重合性化合物と、硬化剤と、光重合開始剤とを含むものが挙げられる。
アクリル系粘着剤としては、特に限定はないが、例えば、アクリル酸エステル重合体が挙げられる。ここで、本明細書において、(メタ)アクリル酸のように(メタ)を含む化合物は名称中に「メタ」を有する化合物と「メタ」を有さない化合物の総称である。
(メタ)アクリル重合体のエステルモノマーとしては、例えば、ブチル(メタ)アクリレート、2-ブチル(メタ)アクリレート、t-ブチル(メタ)アクリレート、ペンチル(メタ)アクリレート、オクチル(メタ)アクリレート、2-エチルヘキシル(メタ)アクリレート、ノニル(メタ)アクリレート、デシル(メタ)アクリレート、ラウリル(メタ)アクリレート、メチル(メタ)アクリレート、エチル(メタ)アクリレート、イソプロピル(メタ)アクリレート、トリデシル(メタ)アクリレート、ミリスチル(メタ)アクリレート、セチル(メタ)アクリレート、ステアリル(メタ)アクリレート、シクロヘキシル(メタ)アクリレート、ベンジル(メタ)アクリレート等が挙げられる。
光重合性化合物としては、特に限定はないが、例えば、ウレタンアクリレートオリゴマーを用いることができる。ウレタンアクリレートオリゴマーは、例えばアクリロイルオキシ基若しくはメタクリロイルオキシ基をもつ多価イソシアネートに、ヒドロキシ基を有する(メタ)アクリレートを反応させて得られる。
硬化剤としては、多官能イソシアネート硬化剤、多官能エポキシ硬化剤、アジリン化合物、メラミン化合物等が挙げられる。
多官能イソシアネート硬化剤としては、例えば芳香族ポリイソシアネート硬化剤、脂肪族ポリイソシアネート硬化剤、脂環族ポリイソシアネート硬化剤があり、一般的にはアダクト型として二量体以上で使用される。
光重合開始剤としては、ベンゾイン、ベンゾインアルキルエーテル類、アセトフェノン類、アントラキノン類、チオキサントン類、ケタール類、ベンゾフェノン類又はキサントン類などが用いられる。
ベンゾインとしては、例えばベンゾイン、ベンゾインメチルエーテル、ベンゾインエチルエーテル、ベンゾインプロピルエーテル等が挙げられる。
アセトフェノン類としては、例えばベンゾインアルキルエーテル類、アセトフェノン、2,2-ジメトキシ-2-アセトフェノン、2,2―ジエトキシ-2-アセトフェノン、1,1-ジクロロアセトフェノン等が挙げられる。
アントラキノン類としては、2-メチルアントラキノン、2-エチルアントラキノン、2-ターシャリブチルアントラキノン、1-クロロアントラキノン等が挙げられる。
チオキサントン類としては、例えば2,4-ジメチルチオキサントン、2,4-ジイソプロピルチオキサントン、2-クロロチオキサントン、2,4-ジイソプロピルチオキサントン等が挙げられる。
さらに、粘着剤層には、例えば、必要に応じて、軟化剤、老化防止剤、充填剤、導電剤、紫外線吸収剤、及び光安定剤等の各種添加剤を添加してもよい。
また、粘着剤層と直下の部材との密着力、例えば、粘着剤層/基材フィルム間、粘着剤層/内側帯電防止層間、粘着剤層/内側保護層間の密着力(アンカー性〔単位:N/20mm〕)は、特に限定されるものではないが、テープ剥離後の糊残りの観点から、1N/20mm以上であることが好ましく、6N/20mm以上であることが更に好ましい。当該アンカー性は実施例に記載の方法にて測定することができる。
帯電防止層は帯電防止材を含む層である。本実施形態においては、上述のように、外側帯電防止層に加えて、内側帯電防止層を形成することもできる。
帯電防止材としては、特に限定はないが、カーボンナノチューブ、金属酸化物、ポリチオフェン、ポリアニリン及びポリピロールのうち少なくとも1種が好ましい。前記カーボンナノチューブ、金属酸化物、ポリチオフェン、ポリアニリン及びポリピロールとしては、帯電防止材(導電材料)として用いられるものであれば、特に制限なく、公知のものを適宜選定して用いることができる。また、これら帯電防止材としては、帯電防止効果の観点から、カーボンナノチューブが特に好ましい。
外側帯電防止層及び内側帯電防止層には同様の帯電防止材を用いることができ、両層は同一の材料で形成される層であってもよいし、異なる材料を用いて形成されていてもよい。
また、カーボンナノチューブは、帯電防止層中において、1本ずつ分離した状態で分散していてもよいし、複数本が束になった状態で分散していてもよい。
バインダーは、特に限定されないが、例えば、(メタ)アクリル酸エステル系重合体、アクリル系重合体、ウレタン系重合体、ポリエステル系重合体、エポキシ系重合体、ポリ塩化ビニル系重合体、メラニン系重合体、ポリイミド系重合体、及びシリコーン系重合体等が挙げられ、(メタ)アクリル酸エステル系重合体が好ましい。(メタ)アクリル酸エステル系重合体としては、上述の粘着剤層に用いられる(メタ)アクリル酸エステル系重合体と同様のものを挙げることができる。
帯電防止層には、必要に応じて本発明の効果を阻害しない範囲で、その他、各種添加剤、例えば硬化剤、可塑剤、老化防止剤、充填剤等を適宜添加してもよい。
また、内側帯電防止層の厚みは特に限定されるものではないが、帯電防止層の強度(例えばクラック耐性等)、基材フィルムとの密着性、十分な帯電防止効果を発揮する観点から、0.01~1μmが好ましく、0.02~0.2μmがさらに好ましい。
保護層は、帯電防止材を保護するために設けられる層である。本実施形態においては、上述のように、外側保護層に加えて、内側保護層を形成することができる。また、外側保護層は、ダイシング工程時において、帯電防止層の脱落を防ぐことを主な目的とする層である。さらに、内層及び外側保護層は双方ともに、基材フィルムの取り扱い時に例えば、接触時における物理的な衝撃等のダメージを抑制し、さらに、帯電防止層の脱落を防ぐことができる。さらに、内側保護層を備えた電子部材用粘着シートは、比較的温度の高い状況下に一定時間保存された場合であっても、粘着剤層の粘着力維持率に優れる。
なお、保護層は、タック性を有さないことが好ましい。ここで「タック性を有さない」とは、プローブタック(ASTM D 2979に準拠)が0.1N/20mm2以下であることが好ましい。
外側保護層及び内側保護層は、両層同一の材料で形成される層であってもよいし、異なる材料を用いて形成された層であってもよい。内側保護層と外側保護層とを異なる材料で形成する場合、少なくとも外側保護層がタック性を有さないことが好ましい。
また、内側保護層の厚みは特に限定されるものではないが、保護層の強度、帯電防止効果の観点から、0.1~5μmが好ましく、0.5~2μmがさらに好ましい。
本実施形態の粘着シートの表面抵抗値は、例えば、JIS-K6911に準じて、エレクトロメーター等を用いて測定することができる。本実施形態の粘着シートは、少なくとも一方の表面の表面抵抗値が1×107Ω/□以下であることが好ましい。
具体的には、粘着シートの外側最外面の表面抵抗値は、特に限定はないが、テープの剥離帯電を抑制する観点から、1×107Ω/□以下が好ましい。
また、粘着シートの粘着面側(粘着剤層)表面の表面抵抗値は、特に限定はないが、テープの剥離帯電を抑制する観点から、1×1010Ω/□以下が好ましい。
本実施形態の粘着シートの製造方法は特に限定されるものではなく、基材フィルム上に各層を上述の方法を用いて作製することができる。例えば、図1(A)における粘着シート100の場合、基材フィルム上の片面のみに帯電防止層及び保護層をこの順で形成し、逆側の面に粘着剤層を設けることで作製することができる。
また、当該基材フィルムを用いる場合、粘着剤層を設ける前に内側帯電防止層を形成し、その上に粘着剤層を設けることで、図1(B)における粘着シート200を作製することができる。
また、粘着シート200は、両面に帯電防止層と保護層とを有する基材フィルムを用い、片側のみ保護層を除去して、当該除去面に粘着剤層を設けることでも作製することができる。
さらに、両面に帯電防止層と保護層とを有する基材フィルムを用い、一方の保護層上に粘着剤層を設けることで、図1(C)における粘着シート300を作製することができる。
本実施形態の粘着シートを使用した電子部材の製造方法は特に限定されないが、例えば下記の手順を含む製造方法が挙げられる。
貼付工程において、粘着シートを半導体ウエハ又はパッケージ基板等の電子部材と、リングフレームとに貼り付ける。半導体ウエハは、シリコンウエハ、ガリウムナイトライドウエハ、炭化ケイ素ウエハ或いはサファイアウエハなどの従来汎用のウエハであってよい。パッケージ基板は樹脂でチップを封止したパッケージ基板、LEDパッケージ基板、セラミック基板などの汎用の基板であってよい。
ダイシング工程において、シリコンウエハ等電子部材をダイシングして半導体チップ又は半導体部品にする。
光照射工程において、基材フィルム側から光硬化型の粘着剤層に紫外線等の活性光線を照射する。紫外線の光源としては、低圧水銀灯、高圧水銀灯、超高圧水銀灯、メタルハライドランプ、ブラックライトを用いることができる。また、紫外線に代えて電子線を用いてもよく、電子線の光源としてはα線、β線、γ線を用いることができる。
光照射により粘着剤層は三次元網状化して硬化し、粘着剤層の粘着力が低下する。
エキスパンド・ピックアップ工程において、半導体チップ同士の間隔を広げるため粘着シートを引き伸ばし、チップ又は部品をニードルピン等で突き上げる。その後、チップ又は部品を真空コレット又はエアピンセット等で吸着し、粘着シートの粘着剤層から剥離してピックアップする。
実施例、比較例における電子部材固定用粘着シートを以下の処方で製造した。
具体的には、下記アクリル系UV粘着剤を溶媒(トルエン)で稀釈した溶液を剥離フィルム(製品名:E7002(東洋紡株式会社製))に塗布し、乾燥炉で溶剤を乾燥させた後、両面に下記帯電防止層及び保護層がこの順で設けられた下記基材フィルムと張り合わせて実施例の電子部材固定用粘着シートを作製した。なお、比較例においては保護層が設けられていない基材フィルムを用いた。
また、実施例、比較例における電子部材固定用粘着シートについて各測定をおこなった。
・粘着剤層A(乾燥膜厚10μm):アクリル系UV粘着剤A(主成分 アクリル酸2エチルヘキシル(2―EHA)、アクリル酸メチル(MA)、アクリル酸2-ヒドロキシエチル(2-HEA)、アクリル酸(AA)、ペンタエリスリトールトリアクリレート、イソホロンジイソシアネート(IPDI)、トリメチロールプロパン(TMP)、トルエンジイソシアネート(TDI))
・粘着剤層B(乾燥膜厚10μm):アクリル系UV粘着剤B(主成分 ジメチルアクリルアミド(その他、メタクリル酸2-ヒドロキシエチル(2-HEMA)、アクリル酸エチル(EA)、アクリル酸ブチル(BA)、アクリル酸2エチルヘキシル(2―EHA)、グリシジルメタクリラート(GMA),ペンタエリスリトールトリ及びテトラアクリレート(PETA)を含む)
・基材A(膜厚150μm):アイオノマフィルム(製品名ハイミラン(登録商標)(三井・デュポンポリケミカル株式会社製))
・基材B(膜厚150μm):PO系フィルム(ポリプロピレン(10μm)/ポリエチレン(130μm)/ポリプロピレン(10μm)の3層構造フィルム)
内側及び外側保護層共に乾燥膜厚:1μm(グラビア塗工で作製)
・保護層A:ポリエステル+WAX
・保護層B:溶剤系アクリル
・保護層C:水系アクリル
・保護層D:水系オレフィン
・保護層E:アクリル系重合体(ポリメタクリル酸メチル樹脂)
内側及び外側帯電防止層共に乾燥膜厚:1μm未満
・帯電防止層A:
カーボンナノチューブ(乾燥膜厚中の含有量:8~10g/m2):単層カーボンナノ
チューブ
バインダー:ポリメタクリル酸メチル樹脂
・帯電防止層B:
4級アンモニウム(帯電防止材)
バインダー:ポリメタクリル酸メチル樹脂
・帯電防止層C
PEDOT:ポリ(3,4-エチレンジオキシチオフェン)
微少電流計(製品名:5451(株式会社エーディーシー製)、測定方法:二重リング法、印加電圧:10V、測定環境:23℃・湿度50%)を用いて、各用粘着シートの粘着剤層表面及び外側保護層表面について、表面抵抗値を測定した。
具体的には、電子部材固定用粘着シートの表面に電極(プローブ)を押し当て、印加電圧を10Vとして、表面を流れてくる電流を検出した。この際、測定面を上側とし、電子部材固定用粘着シートの下側にガード電極を置くことによって、試料の厚み方向に回り込んだ電流をグランドに流し、純粋に測定面を流れる電流のみを測定した。結果を表に示す。
粘着シートの加熱促進試験(60℃×12日)後、粘着シートの粘着力(X1〔単位:N/10mm〕;JIS Z 0237に準拠)を測定し、初期値(加熱促進試験前:X0〔単位:N/10mm〕)に対する変動(|(X0-X1)÷X0|)×100〔単位:%〕を評価した。結果を表に示す。
A:0%以上5%未満
B:5%以上10%未満
C:10%以上
外側保護層のプローブタックは、室温23±2℃湿度50±2%の室内にて、株式会社ユービーエム製のプローブタックテスターTA500を使用して測定した。測定条件は、押し付け時間を1秒、荷重400gf/cm2、プローブの剥離速度は10mm/秒とした。結果を表に示す。
粘着シートのテープ粘着剤面に対する他方の面側(外側)に対し、2kgのローラーにて1往復させた後、ローラー表面を目視により観察した。帯電防止材又は保護層の脱落によってローラー表面が黒く変色したか否かに基づき、粘着シートの外側に位置する最表面層の欠落の程度を下記の基準に従って評価した。結果を表に示す。
A:変色なし
B:ローラーが部分的に変色
C:ローラー全面が変色
電子部材固定用粘着シートの粘着剤層に厚さ方向に切れ目を入れた。切れ目を入れた粘着剤層に強粘着テープを貼り合わせ、紫外線を照射(照射源:高圧水銀灯、照射量:250mJ/cm2)して粘着剤層を硬化させた。
その後、粘着剤層が切れ目から内側帯電防止層又は内側保護層との界面から剥がれるように、テンシロン万能材料試験機(株式会社オリエンテック製「RTC-1210」)を用いて、シート表面と平行となる方向に荷重をかけ(引張速度300mm/分、室温23±2℃)、粘着剤層が完全に剥離した際の強度又は強粘着テープと粘着剤との間で剥離した際の強度を測定し、粘着剤層/内側保護層(又は内側帯電防止層若しくは基材フィルム)間のアンカー性を評価した。
また、明細書に記載された全ての文献、特許出願、及び技術規格は、個々の文献、特許出願、及び技術規格が参照により取り込まれることが具体的かつ個々に記された場合と同程度に、本明細書中に参照により取り込まれる。
Claims (9)
- 基材フィルムと、前記基材フィルムの一方の面側に形成された粘着剤層と、を有し、さらに前記基材フィルムの片面側又は両面側に帯電防止材を含む帯電防止層を有する電子部材固定用粘着シートであって、
前記基材フィルムの他方の面側に、前記帯電防止層として外側帯電防止層と、外側保護層と、をこの順で有する電子部材固定用粘着シート。 - 少なくとも一方の表面の表面抵抗値が1×107Ω/□以下である請求項1に記載の電子部材固定用粘着シート。
- 前記外側帯電防止層に含まれる前記帯電防止材が、カーボンナノチューブ、金属酸化物、ポリチオフェン、ポリアニリン及びポリピロールのうち少なくとも1種である請求項1又は2に記載の電子部材固定用粘着シート。
- さらに、前記基材フィルムと前記粘着剤層との間に、前記帯電防止層として内側帯電防止層を有する請求項1~請求項3のいずれか一項に記載の電子部材固定用粘着シート。
- 前記内側帯電防止層に含まれる前記帯電防止材が、カーボンナノチューブ、金属酸化物、ポリチオフェン、ポリアニリン及びポリピロールのうち少なくとも1種である請求項4に記載の電子部材固定用粘着シート。
- さらに、前記粘着剤層と前記内側帯電防止層との間に、内側保護層を有する請求項4又は5に記載の電子部材固定用粘着シート。
- 前記基材フィルムが、ポリオレフィン系樹脂、ポリエステル系樹脂及びこれらの共重合体から選ばれる少なくとも1種を含む請求項1~請求項6のいずれか一項に記載の電子部材固定用粘着シート。
- 前記粘着剤層が、アクリル系粘着剤を含む請求項1~請求項7のいずれか一項に記載の電子部材固定用粘着シート。
- 前記粘着剤層が、紫外線硬化樹脂組成物を含む請求項1~請求項8のいずれか一項に記載の電子部材固定用粘着シート。
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Citations (7)
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JPS63380A (ja) * | 1986-06-19 | 1988-01-05 | Sekisui Chem Co Ltd | 帯電防止粘着テ−プもしくはシ−ト |
JPH05166692A (ja) * | 1991-12-12 | 1993-07-02 | Nitto Denko Corp | 半導体ウエハの保護部材 |
JPH09190990A (ja) * | 1996-01-11 | 1997-07-22 | Toyo Chem Co Ltd | 半導体ウエハ固定用シート |
JP2008280520A (ja) * | 2007-04-11 | 2008-11-20 | Furukawa Electric Co Ltd:The | 半導体固定用粘着テープ |
WO2009113216A1 (ja) * | 2008-03-10 | 2009-09-17 | 古河電気工業株式会社 | 電子部品加工用粘着テープ |
JP2015162561A (ja) * | 2014-02-27 | 2015-09-07 | 住友ベークライト株式会社 | ダイシングフィルム |
JP2018177235A (ja) * | 2017-04-03 | 2018-11-15 | 大日本印刷株式会社 | 電子機器部品製造工程用の粘着性積層体及びそれを用いた電子機器部品の製造方法 |
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JP6782237B2 (ja) | 2015-07-24 | 2020-11-11 | デンカ株式会社 | 半導体加工用粘着テープ及びそれを用いた半導体チップ又は半導体部品の製造方法 |
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- 2020-11-09 KR KR1020227022435A patent/KR20220115581A/ko active Search and Examination
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JPS63380A (ja) * | 1986-06-19 | 1988-01-05 | Sekisui Chem Co Ltd | 帯電防止粘着テ−プもしくはシ−ト |
JPH05166692A (ja) * | 1991-12-12 | 1993-07-02 | Nitto Denko Corp | 半導体ウエハの保護部材 |
JPH09190990A (ja) * | 1996-01-11 | 1997-07-22 | Toyo Chem Co Ltd | 半導体ウエハ固定用シート |
JP2008280520A (ja) * | 2007-04-11 | 2008-11-20 | Furukawa Electric Co Ltd:The | 半導体固定用粘着テープ |
WO2009113216A1 (ja) * | 2008-03-10 | 2009-09-17 | 古河電気工業株式会社 | 電子部品加工用粘着テープ |
JP2015162561A (ja) * | 2014-02-27 | 2015-09-07 | 住友ベークライト株式会社 | ダイシングフィルム |
JP2018177235A (ja) * | 2017-04-03 | 2018-11-15 | 大日本印刷株式会社 | 電子機器部品製造工程用の粘着性積層体及びそれを用いた電子機器部品の製造方法 |
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