WO2017072901A1 - 半導体ウエハ表面保護用粘着テープおよび半導体ウエハの加工方法 - Google Patents
半導体ウエハ表面保護用粘着テープおよび半導体ウエハの加工方法 Download PDFInfo
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- WO2017072901A1 WO2017072901A1 PCT/JP2015/080498 JP2015080498W WO2017072901A1 WO 2017072901 A1 WO2017072901 A1 WO 2017072901A1 JP 2015080498 W JP2015080498 W JP 2015080498W WO 2017072901 A1 WO2017072901 A1 WO 2017072901A1
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- semiconductor wafer
- adhesive tape
- pressure
- sensitive adhesive
- protecting
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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
- C09J7/29—Laminated material
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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
- 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
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- H10P52/00—
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- H10P72/0442—
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- H10P72/7402—
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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
Definitions
- the present invention relates to an adhesive tape for protecting a semiconductor wafer surface and a method for processing a semiconductor wafer. More specifically, the present invention relates to a semiconductor wafer surface protecting adhesive tape applicable to a semiconductor wafer thin film grinding process and a semiconductor wafer processing method using the semiconductor wafer surface protecting adhesive tape.
- the semiconductor wafer after pattern formation is usually subjected to processing such as back grinding and etching on the back surface of the semiconductor wafer in order to reduce the thickness.
- an adhesive tape for protecting the surface of the semiconductor wafer is attached to the pattern surface.
- the adhesive tape for protecting a semiconductor wafer surface is generally formed by laminating an adhesive layer on a base resin film, and an adhesive layer is attached to the back surface of a semiconductor wafer for use.
- the semiconductor wafer surface protection adhesive tape to be used needs to have a high elastic modulus.
- the elastic modulus of the adhesive tape is increased, it becomes difficult to bend. Therefore, when the adhesive tape for protecting the semiconductor wafer surface is peeled off from the surface of the semiconductor wafer, the peeling angle becomes acute, the semiconductor wafer is damaged, or the surface of the semiconductor wafer is In addition, there is a problem that contamination of the semiconductor wafer such as adhesive residue to which the adhesive residue of the adhesive tape for protecting the semiconductor wafer surface adheres easily occurs.
- chip peeling occurs in which the chip is picked up from the dicing tape or the dicing die bonding film.
- the adhesive tape for protecting the surface of a semiconductor wafer applied to the tip dicing method and the tip stealth method is required to suppress kerf shift and to prevent the wafer from being damaged or contaminated including chip peeling.
- the present invention provides a pressure-sensitive adhesive tape for protecting a semiconductor wafer surface, which can suppress kerf shift when applying the first dicing method or the first stealth method, and can be peeled off without damaging or contaminating the semiconductor wafer. With the goal.
- a semiconductor wafer surface protecting pressure-sensitive adhesive tape comprises a base resin film and a radiation curable pressure-sensitive adhesive layer formed on at least one side of the base resin film.
- the base resin film has at least one rigid layer having a tensile modulus of 1 to 10 GPa, and is No. 280 water-resistant abrasive paper defined in JIS R 6253 after the adhesive layer is cured by radiation.
- the peel force at a peel angle of 30 ° with respect to 1.5 mm thick stainless steel (Steel Use Stainless, SUS) defined in JIS G 4305 is 0.1 to 3.0 N / 25 mm. To do.
- the adhesive tape for semiconductor wafer surface protection by this invention is formed in the at least single side
- the base resin film has at least one rigid layer having a tensile modulus of 1 to 10 GPa and is No. 280 water-resistant abrasive paper as defined in JIS R 6253 at 50 ° C.
- the peel force at a peel angle of 30 ° with respect to stainless steel (Steel Use Stainless, SUS) as defined in the finished JIS G 4305 is 0.1 to 3.0 N / 25 mm. .
- the semiconductor wafer surface protecting adhesive tape preferably has a repulsive force per unit width of 2 to 15 mN / mm determined from the load load of loop stiffness measured under the following conditions (a) to (d).
- D Indenter push-in amount Push in 5 mm from the point when the indenter contacts the loop.
- the layer between the rigid layer and the adhesive layer is composed only of a layer having a tensile modulus of less than 1 GPa, and the thickness of the adhesive layer and the tensile modulus of elasticity. Is preferably 60 ⁇ m or less.
- the adhesive layer is immersed in a slurry for chemical mechanical polishing in which colloidal silica having an average particle size of 50 nm is dispersed in a sodium hydroxide aqueous solution having a pH of 12 for 24 hours. It is preferable that the ratio with respect to before infiltrating into the said slurry of the insoluble matter later is 75% or more.
- the adhesive tape for protecting a semiconductor wafer surface includes a radioactive reactive resin having an ethylenically unsaturated group in a side chain, and reacts with the radioactive reactive resin by irradiation with radiation. It is preferable to include a modifier for reducing the peeling force.
- the modifying agent is preferably non-silicone.
- a method for manufacturing a semiconductor wafer according to the present invention includes: (a) a step of forming a groove having a thickness less than the thickness of the semiconductor wafer from the surface of the semiconductor wafer in a scheduled cutting line of the semiconductor wafer; And (b) bonding the semiconductor wafer surface protective adhesive tape according to any one of claims 1 to 7 to the surface of the semiconductor wafer on which the groove is formed; And grinding the back surface of the semiconductor wafer to singulate the semiconductor wafer.
- a method for manufacturing a semiconductor wafer according to the present invention includes: (a) a step of forming a modified region by irradiating a laser inside the semiconductor wafer in a division line of the semiconductor wafer; (B) before or after the step (a), the step of bonding the semiconductor wafer surface protecting adhesive tape according to any one of claims 1 to 7 to the surface of the semiconductor wafer; ) The method includes the step of separating the semiconductor wafer into pieces by grinding the back surface of the semiconductor wafer.
- the step (c) may include a step of performing chemical polishing.
- the pressure-sensitive adhesive tape for protecting the surface of a semiconductor wafer according to the present invention, in the back grinding process of the semiconductor wafer to which the tip dicing method or the tip stealth method is applied, the kerf shift of the separated semiconductor chip is suppressed, and the semiconductor wafer Can be processed without breakage or contamination.
- FIG. 1 is a cross-sectional view schematically showing the structure of a semiconductor wafer surface protecting adhesive tape 1 according to an embodiment of the present invention.
- the semiconductor wafer surface protecting adhesive tape 1 has a base resin film 2, and an adhesive layer 4 is provided on at least one side of the base resin film 2. It has been. On the pressure-sensitive adhesive layer 4, if necessary, a release film (not shown) whose surface has been release-treated may be laminated so that the release treatment surface is on the pressure-sensitive adhesive layer 4 side.
- Base resin film 2 As the base resin film 2 of the adhesive tape 1 for protecting a semiconductor wafer surface of the present invention, a known plastic, rubber, or the like can be used. In particular, when a radiation curable composition is used for the pressure-sensitive adhesive layer 4, it is preferable to select a base resin film 2 that has good transmittance for radiation having a wavelength at which the composition is cured.
- radiation refers to, for example, light such as ultraviolet rays, ionizing radiation such as laser light, or electron beam, and these are hereinafter collectively referred to as radiation.
- the base resin film 2 examples include polyethylene, polypropylene, ethylene-propylene copolymer, polybutene-1, poly-4-methylpentene-1, ethylene-vinyl acetate copolymer, ethylene- Copolymers or copolymers of ⁇ -olefins such as ethyl acrylate copolymer, ethylene-methyl acrylate copolymer, ethylene-acrylic acid copolymer, ionomer, or mixtures thereof, polyethylene terephthalate, polyethylene naphthalate, There are engineering plastics such as polycarbonate and polymethyl methacrylate, thermoplastic elastomers such as polyurethane, styrene-ethylene-butene or pentene copolymers, polyamide-polyol copolymers, and mixtures thereof. Moreover, you may use what made these two or more layers.
- the base resin film 2 of the semiconductor wafer surface protecting pressure-sensitive adhesive tape 1 reduces the amount of kerf shift when used in the tip dicing method and the tip stealth method, and is used in a normal back grinding process.
- a rigid layer having a tensile elastic modulus of 1 to 10 GPa is included as an essential element in order to suppress warpage of the semiconductor wafer 5 (see FIG. 2).
- the resin constituting the rigid layer include polyester films such as polyethylene terephthalate.
- the thickness of the rigid film is suitably 10 to 100 ⁇ m, preferably 10 to 50 ⁇ m, and more preferably 20 to 40 ⁇ m.
- the repulsive force in loop stiffness which is an index of bendability, is preferably 2 to 15 mN / 25 mm or less, and more preferably 5 to 13 mN / 25 mm.
- the repulsive force in the loop stiffness is the repulsive force per unit width obtained from the load load of the loop stiffness measured under the following conditions (a) to (d).
- D Indenter push-in amount Push in 5 mm from the point when the indenter contacts the loop.
- the use of the base resin film 2 in which the polyolefin layer is laminated on one side or both sides of the rigid layer can also impart cushioning properties when grinding the back surface of the semiconductor wafer 5, and apply the unevenness on the surface of the semiconductor wafer 5 to the adhesive layer 4. It is preferable from the viewpoint of improving the embedding property and further improving the adhesiveness to the heat seal used when peeling the adhesive tape 1 for protecting the semiconductor wafer surface.
- the resin applied to the laminated polyolefin layer low density polyethylene, ethylene-vinyl acetate copolymer, polypropylene and the like are preferable.
- a known method for forming the base resin film 2 by laminating each layer for example, a known method such as pasting or co-extrusion using a pressure-sensitive adhesive or an adhesive can be applied.
- the surface of the base resin film 2 on which the pressure-sensitive adhesive layer 4 is provided may be appropriately subjected to a treatment such as a corona treatment or a primer layer in order to improve the adhesion with the pressure-sensitive adhesive layer 4.
- the surface of the base resin film 2 on which the pressure-sensitive adhesive layer 4 is not provided is also preferably textured or coated with a lubricant, thereby preventing blocking during storage of the surface-protective pressure-sensitive adhesive tape of the present invention. Obtainable.
- the adhesive tape 1 for protecting a semiconductor wafer surface has an adhesive layer 4 formed on a base resin film 2.
- the pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layer 4 can sufficiently maintain the adhesion to the semiconductor wafer 5 when the semiconductor wafer 5 is ground, and the semiconductor wafer 5 is damaged when the front-surface semiconductor wafer surface protecting pressure-sensitive adhesive tape 1 is peeled off. Although it will not specifically limit if it does not make it, It is preferable to select the thing with which the peeling force in the low angle as described below becomes low.
- the main component polymer is preferably a (meth) acrylic resin. By using (meth) acrylic resin as the main component polymer, it becomes easy to control the adhesive force, and the elastic modulus and the like can be controlled.
- the pressure-sensitive adhesive composition constituting the pressure-sensitive adhesive layer 4 it is preferable to use a radiation-curable pressure-sensitive adhesive from the viewpoint of peelability.
- the resin such as the adhesive base resin has an ethylenically unsaturated group (non-aromatic carbon-carbon double bond) or the adhesive base resin has an ethylenically unsaturated group.
- the compound which has is used together.
- the resin such as the pressure-sensitive adhesive base resin uses a resin having an ethylenically unsaturated group in the side chain.
- it is preferable to contain a photoinitiator and a crosslinking agent in an adhesive composition and it is preferable to contain a crosslinking agent in order to adjust the elasticity modulus and adhesive force of the adhesive layer 4.
- pressure-sensitive adhesive that does not cure by radiation irradiation
- heat of about 50 ° C. is applied at the time of peeling instead of radiation irradiation. It is also possible to reduce the peeling force.
- pressure-sensitive adhesives include structural units derived from (meth) acrylic acid alkyl ester monomers and 2-hydroxypropyl acrylate, 2-hydroxylethyl (meth) acrylate and / or 2-hydroxybutyl acrylate. It is possible to use a copolymer obtained by crosslinking a copolymer containing a structural unit derived from the (meth) acrylic acid alkyl ester monomer with an isocyanate compound.
- the resin having an ethylenically unsaturated group Any resin having an ethylenically unsaturated group may be used, but a (meth) acrylic resin is preferred.
- the iodine value which is an indicator of the amount of double bonds contained in the resin, is preferably from 0.5 to 20.
- the iodine value is more preferably 0.8 to 10. If the iodine value is 0.5 or more, an effect of reducing the adhesive strength after radiation irradiation can be obtained, and if the iodine value is 20 or less, excessive radiation curing can be prevented.
- the resin having an ethylenically unsaturated group preferably has a glass transition temperature (Tg) of ⁇ 70 ° C. to 0 ° C. If the glass transition temperature (Tg) is ⁇ 70 ° C. or higher, the heat resistance against heat accompanying the processing steps of the semiconductor wafer 5 is increased.
- the resin having an ethylenically unsaturated group may be produced in any way, but the (meth) acrylic resin having a functional group ( ⁇ ) in the side chain is combined with the ethylenically unsaturated group and the functional group in the resin.
- a method of reacting a compound having a functional group ( ⁇ ) that reacts with ( ⁇ ) and introducing an ethylenically unsaturated group into the side chain of the (meth) acrylic resin is preferred.
- the ethylenically unsaturated group may be a group such as: (meth) acryloyl group, (meth) acryloyloxy group, (meth) acryloylamino group, allyl group, 1-propenyl group, vinyl group (styrene) Or a substituted styrene) is preferable, and a (meth) acryloyl group and a (meth) acryloyloxy group are more preferable.
- Examples of the functional group ( ⁇ ) that reacts with the functional group ( ⁇ ) include a carboxyl group, a hydroxyl group, an amino group, a mercapto group, a cyclic acid anhydride group, an epoxy group, and an isocyanate group.
- one functional group of the functional group ( ⁇ ) and the functional group ( ⁇ ) is a carboxyl group, a hydroxyl group, an amino group, a mercapto group, or a cyclic acid anhydride group
- the other functional group is , An epoxy group, and an isocyanate group.
- one functional group is a cyclic acid anhydride group
- the other functional group includes a carboxyl group, a hydroxyl group, an amino group, and a mercapto group.
- one functional group is an epoxy group
- the other functional group may be an epoxy group.
- the (meth) acrylic resin having a functional group ( ⁇ ) in the side chain can be obtained by polymerizing (meth) acrylic acid ester, acrylic acid or (meth) acrylamide having a functional group ( ⁇ ).
- the functional group ( ⁇ ) include a carboxyl group, a hydroxyl group, an amino group, a mercapto group, a cyclic acid anhydride group, an epoxy group, and an isocyanate group.
- a carboxyl group and a hydroxyl group are preferable, and a hydroxyl group is particularly preferable.
- Such monomers include acrylic acid, methacrylic acid, cinnamic acid, itaconic acid, fumaric acid, phthalic acid, 2-hydroxyalkyl acrylates, 2-hydroxyalkyl methacrylates, glycol monoacrylates, glycol monomethacrylates, N-methylolacrylamide, N-methylolmethacrylamide, allyl alcohol, N-alkylaminoethyl acrylates, N-alkylaminoethyl methacrylates, acrylamides, methacrylamides, maleic anhydride, itaconic anhydride, fumaric anhydride, anhydrous Phthalic acid, glycidyl acrylate, glycidyl methacrylate, allyl glycidyl ether, some isocyanate groups of polyisocyanate compounds are hydroxyl or carboxyl groups and radiation curing Carbon - like a like those urethanization a monomer having a carbon-carbon double bond.
- acrylic acid, methacrylic acid, 2-hydroxyalkyl acrylates, 2-hydroxyalkyl methacrylates, glycidyl acrylate, and glycidyl methacrylate are preferable.
- Acrylic acid, methacrylic acid, 2-hydroxyalkyl acrylates, 2-hydroxyalkyl methacrylate Are more preferable, and 2-hydroxyalkyl acrylates and 2-hydroxyalkyl methacrylates are more preferable.
- the resin having an ethylenically unsaturated group is preferably a copolymer with another monomer such as (meth) acrylic acid ester together with the above-mentioned monomer.
- (Meth) acrylic acid esters include methyl acrylate, ethyl acrylate, n-propyl acrylate, n-butyl acrylate, isobutyl acrylate, n-pentyl acrylate, n-hexyl acrylate, n-octyl acrylate, isooctyl acrylate, 2-ethylhexyl Acrylate, dodecyl acrylate, decyl acrylate hexyl acrylate, and the corresponding methacrylates.
- the (meth) acrylic acid ester may be one type or two or more types, but it is preferable to use one having an alcohol part having 5 or less carbon atoms and one having 6 to 12 carbon atoms.
- the resin having an ethylenically unsaturated group is preferably a resin obtained by further copolymerizing (meth) acrylic acid in addition to (meth) acrylic acid ester.
- the polymerization reaction of a resin having an ethylenically unsaturated group may be any of solution polymerization, emulsion polymerization, bulk polymerization, and suspension polymerization.
- the (meth) acrylic resin having a functional group ( ⁇ ) in the side chain is reacted with a compound having an ethylenically unsaturated group and a functional group ( ⁇ ) that reacts with the functional group ( ⁇ ) in the resin, By making it react excessively and leaving an unreacted functional group, it is possible to adjust to desired adhesive properties and elastic modulus.
- a radical generator such as an azobis type such as ⁇ , ⁇ '-azobisisobutylnitrile or an organic peroxide type such as benzoyl peroxide is usually used.
- a catalyst and a polymerization inhibitor can be used in combination, and a resin having a desired molecular weight can be obtained by adjusting the polymerization temperature and the polymerization time.
- the average molecular weight of the resin having an ethylenically unsaturated group is preferably about 200,000 to 1,500,000, more preferably 700,000 to 1,200,000.
- the low molecular weight component By reducing the low molecular weight component, the surface contamination of the semiconductor wafer 5 can be suppressed.
- the number of molecules having a molecular weight of 100,000 or less is 10% or less. If the molecular weight exceeds 1,500,000, there is a possibility of gelation during synthesis and coating.
- the resin having an ethylenically unsaturated group has an OH group having a hydroxyl value of 5 to 100 mgKOH / g, the risk of tape peeling failure can be further reduced by reducing the adhesive strength after radiation irradiation. It is preferable because it is possible.
- a compound having a functional group ( ⁇ ) that reacts with an ethylenically unsaturated group and a functional group ( ⁇ ) will be described.
- the ethylenically unsaturated group is preferably the group described above, and the preferred range is also the same.
- Examples of the functional group ( ⁇ ) that reacts with the functional group ( ⁇ ) include the groups described above.
- Examples of the compound having a functional group ( ⁇ ) that reacts with the ethylenically unsaturated group and the functional group ( ⁇ ) include a monomer compound having a functional group ( ⁇ ), and a (meth) acrylate having an isocyanate group in the alcohol part.
- a (meth) acrylate having an isocyanate group in the alcohol part is preferred.
- those having an isocyanate group at the terminal of the alcohol part are preferred.
- the number of carbon atoms other than the isocyanate group in the alcohol part is preferably 2 to 8, and the alcohol part is a linear alkyl group. Those are preferred.
- Preferred examples of the (meth) acrylate having an isocyanate group in the alcohol part include 2-isocyanatoethyl acrylate and 2-isocyanatoethyl methacrylate.
- Crosslinking agent polyisocyanates, melamine / formaldehyde resins or epoxy compounds having two or more epoxy groups are preferable, and polyisocyanates are particularly preferable.
- a crosslinking agent can be used individually or in combination of 2 or more types. By crosslinking the resin polymer, the crosslinking agent can improve the cohesive strength of the adhesive after application of the adhesive.
- polyisocyanates examples include hexamethylene diisocyanate, 2,2,4-trimethyl-hexamethylene diisocyanate, isophorone diisocyanate, 4,4′-dicyclohexylmethane diisocyanate, 2,4′-dicyclohexylmethane diisocyanate, lysine diisocyanate, and lysine.
- Coronate L made by Nippon Polyurethane Co., Ltd.
- Coronate L made by Nippon Polyurethane Co., Ltd.
- melamine / formaldehyde resin As the melamine / formaldehyde resin, Nicalac MX-45 (manufactured by Sanwa Chemical Co., Ltd.), melan (manufactured by Hitachi Chemical Co., Ltd.), etc. can be used as commercial products. Furthermore, as the epoxy resin, TETRAD-X (manufactured by Mitsubishi Chemical Corporation) can be used.
- the addition amount of the crosslinking agent is preferably 0.1 to 20 parts by weight, more preferably 1.0 to 10 parts by weight, based on 100 parts by weight of the resin having an ethylenically unsaturated group. In accordance with the number of functional groups of the resin having an unsaturated group, the amount is appropriately adjusted in order to obtain desired adhesive properties and elastic modulus.
- the amount of the crosslinking agent is less than 0.1 parts by mass, the cohesive force improving effect tends to be insufficient.
- the amount exceeds 20 parts by mass the curing reaction proceeds rapidly during the blending and application of the adhesive, and a crosslinked structure is formed. Therefore, workability may be impaired.
- a photopolymerization initiator When a radiation curable pressure-sensitive adhesive is selected as the pressure-sensitive adhesive layer 4, a photopolymerization initiator can be included as necessary. As long as it reacts with the radiation which permeate
- benzophenones such as benzophenone, 4,4′-dimethylaminobenzophenone, 4,4′-diethylaminobenzophenone, 4,4′-dichlorobenzophenone, acetophenones such as acetophenone and diethoxyacetophenone, 2-ethylanthraquinone, t- Anthraquinones such as butylanthraquinone, 2-chlorothioxanthone, benzoin ethyl ether, benzoin isopropyl ether, benzyl, 2,4,5-triallylimidazole dimer (rophine dimer), acridine compound, acylphosphine oxide
- the addition amount of the photopolymerization initiator is preferably 0.1 to 10 parts by mass, more preferably 0.5 to 5 parts by mass with respect to 100 parts by mass of the resin having an ethylenically unsaturated group.
- the pressure-sensitive adhesive layer 4 can be blended with a tackifier, a pressure-adjusting agent, a surfactant, or a modifier, if necessary. Moreover, you may add an inorganic compound filler suitably. In the present invention, it is also preferable to add a modifier from the viewpoint of peelability. Examples of modifiers include silicone compounds, fluorine compounds, and long-chain alkyl group-containing compounds. Addition reduces dust penetration by reducing the peel force at low angles and increasing the contact angle with water. Can be suppressed.
- the modifier is preferably a compound having an ethylenically unsaturated group
- the adhesive base resin has an ethylenically unsaturated group in the side chain. More preferably, it is a resin.
- a modifier having an ethylenically unsaturated group specifically, commercially available products such as Ebecryl 360 (manufactured by Daicel Ornex Co., Ltd.), which is a silicone acrylate, and MegaFac RS-72-K, which is a fluorine-based surface modifier. (Made by DIC Corporation). From the viewpoint of the influence on the surface of the semiconductor wafer 5, it is more preferably a fluorine-based compound.
- the pressure-sensitive adhesive layer 4 can be formed, for example, by applying the above-mentioned pressure-sensitive adhesive composition onto a release film, drying it, and transferring it onto the base resin film 2.
- the thickness of the pressure-sensitive adhesive layer 4 is preferably 1 to 60 ⁇ m.
- the tip dicing method and the tip stealth method a gap is formed between the chips during the backside grinding of the semiconductor wafer. Therefore, when grinding processing such as CMP (chemical mechanical polishing) or etching is performed after grinding. There is a concern that the semiconductor wafer is contaminated by the slurry, or the adhesive of the adhesive tape for protecting the surface of the semiconductor wafer is eroded by the slurry and the semiconductor wafer is contaminated by the brittle adhesive. Further, in the tip dicing method and the tip stealth method, since the semiconductor wafer 5 is formed into chips 11 during grinding, the surface of the semiconductor wafer 5 is more easily contaminated by grinding dust than in normal grinding.
- CMP chemical mechanical polishing
- the adhesion of the surface protection tape to the surface of the semiconductor wafer 5 is further required.
- the tip 11 vibrates in the depth direction during grinding in the tip dicing method or the tip stealth method.
- the pressure-sensitive adhesive layer 4 is preferably thin, more preferably 5 to 30 ⁇ m, and the layer formed between the rigid layer and the pressure-sensitive adhesive layer 4 is only a layer having a tensile modulus of less than 1 GPa.
- the total thickness of the pressure-sensitive adhesive layer 4 and the layer having a tensile modulus of less than 1 GPa is preferably 5 to 60 ⁇ m. Since the layer formed between the rigid layer and the pressure-sensitive adhesive layer 4 is composed of only a layer having a tensile modulus of less than 1 GPa, when there are a plurality of rigid layers, the rigid layer closest to the pressure-sensitive adhesive layer 4 is used. In other words, the layer formed between the adhesive layer 4 and the pressure-sensitive adhesive layer 4 is composed of only a layer having a tensile elastic modulus of less than 1 GPa. Examples of the layer having a tensile elastic modulus of less than 1 GPa include a layer constituting the base resin film other than the rigid layer, an adhesive layer for bonding a plurality of layers constituting the base resin film, and the like.
- the storage elastic modulus of the pressure-sensitive adhesive is preferably 0.01 to 0.1 MPa at 25 ° C., more preferably 0.02 to 0.1 MPa at 50 ° C.
- the pressure-sensitive adhesive layer 4 may have a configuration in which a plurality of pressure-sensitive adhesive layers 4 are laminated.
- the pressure-sensitive adhesive layer 4 has a ratio (gel fraction) of 75% or more with respect to before being immersed in the slurry of insoluble matter after being immersed in the slurry used for chemical polishing of the back surface of the semiconductor wafer 5 for 24 hours. Preferably, it is 90% or more.
- the slurry can be a slurry for chemical mechanical polishing in which, for example, 14% by weight of colloidal silica having an average particle diameter of 50 nm is dispersed in an aqueous sodium hydroxide solution having a pH of 12.
- the pressure-sensitive pressure-sensitive adhesive layer 4 is a radiation-curable pressure-sensitive adhesive layer 4
- the pressure-sensitive pressure-sensitive adhesive layer 4 is a pressure-sensitive pressure-sensitive adhesive layer 4 after radiation irradiation.
- the peeling force at a peeling angle of 30 ° and a tensile speed of 20 mm / min under a heating condition of 50 ° C. is 0.1 to 3 N / 25 mm, preferably 0.5 to 1.8 N. / 25 mm.
- the peeling force is less than 0.1 N / 25 mm
- the back surface of the semiconductor wafer 5 may be ground and separated into chips 11, and then the chips 11 may be displaced during transport to the next step.
- the thickness exceeds 0 N / 25 mm
- the chip 11 is stripped from the dicing tape 6 or the dicing die bonding film bonded to the back surface of the semiconductor wafer 5 when the adhesive tape 1 for protecting the semiconductor wafer surface is peeled off. Adhesive residue in which the adhesive residue of the adhesive tape 1 for chip peeling or semiconductor wafer surface protection adheres to the surface of the semiconductor wafer 5 is liable to occur.
- the semiconductor wafer surface protecting adhesive tape 1 is peeled from the semiconductor wafer 5 by adhering an adhesive type or heat seal type peeling tape to the end of the semiconductor wafer surface protecting adhesive tape 1 and peeling from the end.
- the peeling between the semiconductor wafer surface protecting adhesive tape 1 and the semiconductor wafer 5 is an acute angle, so that it is close to the peeling on the surface, resulting in a much larger peeling force than 90 ° peeling.
- the peeling force at 30 ° peeling is 3.6 N / 25 mm even though the peeling force at 90 ° peeling is 0.4 N / 25 mm.
- the peeling angle 30 ° in the present invention is an angle in the tensile direction with respect to the adherend, and the peeling angle between the actual adherend and the semiconductor wafer surface protecting adhesive tape 1 is the semiconductor wafer surface protecting adhesive tape 1. It depends on the rigidity of the.
- the peeling force at a peeling angle of 30 ° was obtained by collecting a test piece 25 mm wide by 300 mm long from the adhesive tape 1 for protecting the surface of a semiconductor wafer, and finishing the sample with No. 280 water-resistant abrasive paper specified in JIS R 6253.
- the adhesive is a radiation-curing type
- the test piece is pressure-bonded to a 1.5 mm thick stainless steel (Steel Use Stainless, SUS) plate specified in JIS G 4305 by three reciprocations of a 2 kg rubber roller. After being cured by radiation and left for 1 hour, when the pressure sensitive adhesive is pressure sensitive, the measured value is in the range of 15 to 85% of its capacity when the SUS plate is heated to 50 ° C.
- peeling is performed under the conditions of a tensile speed of 20 mm / min, an ambient temperature of 25 ° C., and a relative humidity of 50%, and the peel angle ⁇ is 30 ° (FIG. 1 Obtained by measuring the peel strength in the reference).
- the rigidity and thickness of the base resin film 2 are adjusted. For the local elongation, the thickness on the rigid layer, the addition of a modified layer, and other adhesives. It can be adjusted depending on the composition of the agent.
- a release film is provided on the pressure-sensitive adhesive layer 4 as necessary in the surface-protective pressure-sensitive adhesive tape of the present invention.
- the release film is also called a separator, a release layer, or a release liner, and is provided for the purpose of protecting the pressure-sensitive adhesive layer 4 and for the purpose of smoothing the pressure-sensitive adhesive.
- the constituent material of the release film include synthetic resin films such as polyethylene, polypropylene, and polyethylene terephthalate, and paper.
- a release treatment such as a silicone treatment, a long-chain alkyl treatment, or a fluorine treatment may be performed as necessary.
- the thickness of the release film is usually about 10 to 100 ⁇ m, preferably about 25 to 50 ⁇ m.
- the wafer processing tape 1 of the present invention it is suitable for a manufacturing method of a semiconductor wafer 5 using a tip dicing method or a tip stealth method, for example, the following manufacturing methods (A) to (B) of the semiconductor wafer 5 Can be used for
- Manufacturing method of semiconductor wafer 5 (A) (a) forming a groove 7 having a thickness less than the thickness of the semiconductor wafer 5 from the surface of the semiconductor wafer 5 in a division line of the semiconductor wafer 5; (b) bonding the above-described adhesive tape 1 for protecting a semiconductor wafer surface to the surface of the semiconductor wafer 5 in which the grooves 7 are formed; (c) A method of manufacturing a semiconductor wafer 5 including a step of grinding the back surface of the semiconductor wafer 5 to separate the semiconductor wafer 5 into pieces.
- Manufacturing method of semiconductor wafer 5 (B) (a) a step of forming a modified region by irradiating a laser inside the semiconductor wafer 5 in the planned cutting line of the semiconductor wafer 5; (b) before or after the step (a), the step of bonding the above-mentioned adhesive tape 1 for protecting a semiconductor wafer surface to the surface of the semiconductor wafer 5; (c) A method of manufacturing a semiconductor wafer 5 comprising a step of grinding the back surface of the semiconductor wafer 5 to separate the semiconductor wafer 5 into pieces.
- a method for using the adhesive tape 1 for protecting a semiconductor wafer surface of the present invention that is, an example of a method for processing the semiconductor wafer 5 will be described.
- a groove 7 having a depth equal to or greater than the final product thickness is formed on the semiconductor wafer 5 from the surface side of the semiconductor wafer 5 using a blade (not shown) or a laser (grooving step).
- the adhesive layer 4 of the adhesive tape 1 for semiconductor wafer surface protection is bonded to the surface of the semiconductor wafer 5 on which the circuit pattern is formed (protective tape bonding step).
- the semiconductor wafer 5 in which the groove 7 is formed reaches the groove 7 as shown in FIG. Grind up to. Thereby, the semiconductor wafer 5 is separated into chips 11. If necessary, polishing or etching is performed after the grinding process for the purpose of improving the bending strength of the semiconductor wafer 5.
- polishing chemical mechanical polishing (CMP) can be used.
- CMP chemical mechanical polishing
- the dicing tape 6 or the dicing die bonding film is bonded to the back surface of the semiconductor wafer 5 and the ring frame 9 is bonded to the outer periphery of the dicing tape 6 as shown in FIG.
- the semiconductor wafer surface protecting adhesive tape 1 is peeled off.
- the adhesive tape 1 for protecting a semiconductor wafer surface according to the present embodiment has a peeling force of 0.1 to 3 N / 25 mm at a peeling angle of 30 ° and a tensile speed of 20 mm / min.
- the chip 11 can be prevented from being displaced (kerf shift) during conveyance to the next process, and wafer breakage including chip peeling can be generated. Can be reduced.
- the dicing tape 6 on which the semiconductor wafer 5 and the ring frame 9 are bonded is placed on the stage (not shown) of the expanding apparatus, and the ring frame 9 is fixed.
- the push-up member 10 of the expanding device is raised and the dicing tape 6 is expanded.
- the semiconductor chip 11 can be obtained by pushing up the chip 11 from the back surface side of the dicing tape 6 with the push-up pin 12 and attracting and picking it up with the collet 13.
- the tip stealth method may be used instead of the tip dicing method.
- a modified region forming step is performed in which the modified region is formed by irradiating the semiconductor wafer 5 with laser instead of the groove cutting step.
- the modified region forming step may be performed after the protective tape bonding step.
- a pressure-sensitive adhesive composition was prepared as follows, a pressure-sensitive adhesive tape for protecting a semiconductor wafer surface was prepared by the following method, and its performance was evaluated.
- Adhesive layer composition 2A To 100 parts by mass of a copolymer consisting of 83 parts by mass of 2-ethylhexyl acrylate, 16 parts by mass of 2-hydroxyacrylate and 1 part by mass of methacrylic acid, 10 parts by mass of methacryloyloxyethyl isocyanate as a radiation reactive group is reacted. Coronate L (trade name, manufactured by Nippon Polyurethane Industry Co., Ltd.) 0.8 parts by mass, and SPEDCURE BKL (trade name, manufactured by DKSH Japan Co., Ltd.) 5.0 parts by mass as a photopolymerization initiator were added and mixed. Agent composition 2A was obtained.
- a pressure-sensitive adhesive composition 2B was obtained in the same manner as the pressure-sensitive adhesive composition 2A, except that 2 parts by mass of Megafac RS-72-K (trade name, manufactured by DIC Corporation) was added as a fluorine-based modifier.
- a pressure-sensitive adhesive composition 2C was obtained in the same manner as the pressure-sensitive adhesive composition 2A, except that 0.2 parts by mass of Ebecryl 360 (trade name, manufactured by Daicel Ornex Co., Ltd.) was added as a silicone-based modifier.
- Adhesive layer composition 2D 80 parts by weight of a pentafunctional urethane acrylate oligomer and 20 parts by weight of a trifunctional urethane acrylate oligomer with respect to 100 parts by weight of a copolymer consisting of 80 parts by weight of 2-ethylhexyl acrylate, 19 parts by weight of 2-hydroxyacrylate, and 1 part by weight of methacrylic acid
- coronate L trade name, manufactured by Nippon Polyurethane Industry Co., Ltd.
- SPEEDCURE BKL trade name, manufactured by DKSH Japan Co., Ltd.
- Adhesive layer composition 2E 100 parts by weight of a pentafunctional urethane acrylate oligomer and 30 parts by weight of a trifunctional urethane acrylate oligomer with respect to 100 parts by weight of a copolymer comprising 80 parts by weight of 2-ethylhexyl acrylate, 19 parts by weight of 2-hydroxyacrylate, and 1 part by weight of methacrylic acid
- coronate L trade name, manufactured by Nippon Polyurethane Industry Co., Ltd.
- SPEEDCURE BKL trade name, manufactured by DKSH Japan Co., Ltd.
- Adhesive layer composition 2F Coronate L (trade name, manufactured by Nippon Polyurethane Industry Co., Ltd.) 3 as a polyisocyanate with respect to 100 parts by mass of a copolymer comprising 80 parts by mass of 2-ethylhexyl acrylate, 19 parts by mass of 2-hydroxyacrylate, and 1 part by mass of methacrylic acid 0.0 part by mass was added and mixed to obtain an adhesive composition 2E.
- Example 1 A double-sided corona-treated polyethylene terephthalate film having a thickness of 38 ⁇ m and a tensile modulus of 2 GPa and a polypropylene film having a thickness of 40 ⁇ m were bonded using a 2 ⁇ m adhesive to obtain a laminated base resin film having a total thickness of 80 ⁇ m.
- the pressure-sensitive adhesive composition 2B was applied on a 38 ⁇ m thick polyethylene terephthalate (PET) separator so that the film thickness after drying was 30 ⁇ m, dried, and then the 80 ⁇ m laminated base resin film was formed. Bonding with the polyethylene terephthalate surface gave a 110 ⁇ m thick semiconductor wafer surface protecting adhesive tape.
- PET polyethylene terephthalate
- Example 2 A 110 ⁇ m-thick semiconductor wafer surface protecting adhesive tape was obtained in the same manner as in Example 1 except that 2C was used as the adhesive composition.
- Example 3 A 110 ⁇ m-thick semiconductor wafer surface protecting adhesive tape was obtained in the same manner as in Example 1 except that 2A was used as the adhesive composition.
- Example 4 A 110 ⁇ m-thick semiconductor wafer surface protecting adhesive tape was obtained in the same manner as in Example 1 except that 2D was used as the adhesive composition.
- Example 5 A low-density polyethylene film is extruded on both sides of a polyethylene terephthalate film having a thickness of 50 ⁇ m and a tensile modulus of 2 GPa so as to have a thickness of 30 ⁇ m, and one side of the low-density polyethylene is subjected to corona treatment. A resin film was obtained. Next, the adhesive composition 2A was applied on a polyethylene terephthalate (PET) separator having a thickness of 38 ⁇ m so that the film thickness after drying was 20 ⁇ m and dried, and then the 110 ⁇ m laminated base resin film was formed. It was bonded to a corona-treated low density polyethylene surface to obtain a 130 ⁇ m thick adhesive tape for protecting the surface of a semiconductor wafer.
- PET polyethylene terephthalate
- Example 6 A 105 ⁇ m-thick semiconductor wafer surface protecting adhesive tape was prepared in the same manner as in Example 5 except that the polyethylene terephthalate film of the laminated base resin film was changed to a polyethylene terephthalate film having a thickness of 25 ⁇ m and a tensile modulus of 2 GPa. Obtained.
- Example 7 A low-density polyethylene film was extruded on one side of a polyethylene terephthalate film having a thickness of 50 ⁇ m and a tensile elastic modulus of 2 GPa and subjected to double-side corona treatment to a thickness of 10 ⁇ m to obtain a laminated base resin film having a thickness of 60 ⁇ m.
- the pressure-sensitive adhesive composition 2F was applied onto a polyethylene terephthalate (PET) separator having a thickness of 38 ⁇ m so that the film thickness after drying was 50 ⁇ m and dried, and then the 60 ⁇ m laminated base resin film was formed. Bonded with polyethylene terephthalate surface.
- PET polyethylene terephthalate
- the pressure-sensitive adhesive composition 2C was applied onto a polyethylene terephthalate (PET) separator having a thickness of 38 ⁇ m so that the film thickness after drying was 20 ⁇ m, dried, and then the pressure-sensitive adhesive from which the intermediate separator was peeled off. It was bonded to the surface of the composition 2F to obtain a 130 ⁇ m-thick semiconductor wafer surface protecting adhesive tape.
- PET polyethylene terephthalate
- a low-density polyethylene film is extruded on one side of a polyethylene terephthalate base resin film having a thickness of 100 ⁇ m and a tensile elastic modulus of 2 GPa and subjected to double-side corona treatment to obtain a laminated base resin film having a thickness of 110 ⁇ m. It was. Next, the pressure-sensitive adhesive composition 2F was applied on a 38 ⁇ m thick polyethylene terephthalate (PET) separator so that the film thickness after drying was 20 ⁇ m, dried, and then the polyethylene of the 110 ⁇ m laminated base film was formed. Laminated with terephthalate surface.
- PET polyethylene terephthalate
- the pressure-sensitive adhesive composition 2C was applied onto a polyethylene terephthalate (PET) separator having a thickness of 38 ⁇ m so that the film thickness after drying was 20 ⁇ m, dried, and then the pressure-sensitive adhesive from which the intermediate separator was peeled off.
- PET polyethylene terephthalate
- the film was bonded to the surface of the composition 2F to obtain a 150 ⁇ m thick adhesive tape for protecting the surface of a semiconductor wafer.
- peeling force The peeling force at a peeling angle of 30 ° was measured using the semiconductor wafer surface protecting adhesive tape produced in each Example and each Comparative Example.
- a test piece 14 (see FIG. 10) having a width of 25 mm and a length of 300 mm was cut out from the adhesive tape for protecting the semiconductor wafer surface.
- the stainless steel (Steel Use Stainless, SUS) plate specified in JIS G 4305 finished with 280 No. 280 water-resistant abrasive paper specified in JIS R 6253 the test piece 14 is placed on a 2 kg rubber roller. Reciprocating and crimping.
- the base 15 for fixing the SUS plate was adjusted so as to be driven in accordance with peeling, so that the peeling angle ⁇ was always 30 °.
- measurement may be started at an acute angle than 30 °, and the peeling force at the point where the peeling angle ⁇ becomes 30 ° may be read.
- the 90 ° peeling force at a peeling angle of 90 ° was also obtained in the same manner as above except that the SUS plate was fixed to a base without inclination and peeled at a peeling speed of 50 mm / min by the 90 ° peeling method.
- the pressure-sensitive adhesive was pressure-sensitive, the 30 ° peel force was measured in the same manner while the SUS plate was heated to 50 ° C. instead of being irradiated with ultraviolet rays and left for 1 hour after the irradiation.
- the repulsive force ⁇ was measured using a loop step tester (trade name) manufactured by Toyo Seiki Seisakusho.
- the semiconductor wafer surface protecting adhesive tape prepared in each example and each comparative example was cut into a width of 10 mm to prepare a test piece, and the separator was peeled off and placed on a loop stiffness tester.
- a circular loop having a loop length of 50 mm was formed in the vicinity of the center of a strip-shaped test piece having a loop length of 50 mm or more so that the adhesive layer was inside, and the load applied when the circular loop was pushed in from the outside by 5 mm was measured. .
- the load obtained at this time was converted per width, and the value displayed in mN / mm units was defined as the repulsive force ⁇ .
- Three samples were evaluated and the arithmetic average value was used about the adhesive tape for surface protection of the semiconductor wafer produced in each Example and each comparative example.
- the slurry was taken out from the container, and the slurry was thoroughly washed with pure water. After leaving for 3 days for drying, the sample weight was measured (weight after drying).
- a pseudo step formed by imitating a circuit pattern of a semiconductor wafer and a groove provided in a portion to be cut was formed on a semiconductor wafer having a thickness of 725 ⁇ m and an 8-inch diameter using a dicer.
- lines having a width of 60 ⁇ m and a depth of 10 ⁇ m were provided in a grid pattern at intervals of 5 mm.
- a groove having a width of 30 ⁇ m and a depth of 60 ⁇ m was further provided at the center of the line width.
- the surface protecting adhesive tape for protecting the semiconductor wafer surface of each example and each comparative example was applied to the surface of the semiconductor wafer on which the above-described pseudo step was formed. Bonding was performed so that the tape MD direction and the semiconductor wafer notch direction coincided. Thereafter, using PG3000RM (trade name) manufactured by Tokyo Seimitsu Co., Ltd. as a grinder, the back surface of the semiconductor wafer is ground until the thickness of the semiconductor wafer becomes 30 ⁇ m, and polished using a CMP slurry. Separated into pieces.
- kerfs (grooves) were observed with an optical microscope at a total of three points including the central part and the peripheral part of the semiconductor wafer, and the kerf width was measured.
- the kerf width was observed within one hour after grinding the semiconductor wafer, and was observed from the back side of the semiconductor wafer where the surface protective tape was not applied in the state where the surface protective tape was applied.
- the kerf shift amount the kerf width of the wafer after grinding was measured with an optical microscope, the absolute value of the amount of change from the kerf width (30 ⁇ m) before grinding was measured in the X direction and the Y direction, and measured at three points.
- the average value Kx in the X direction and the average value Ky in the Y direction were evaluated.
- the average value of Kx and Ky is less than 5 ⁇ m and 0.8 ⁇ (Ky / Kx) ⁇ 1.1, ⁇ is good, and the average value of Kx and Ky is 5 ⁇ m or more, or Ky / Kx ⁇ 0.8 or The case of 1.1 ⁇ Ky / Kx was evaluated as x as a defective product.
- the semiconductor wafer surface protective adhesive tape after peeling the semiconductor wafer surface protective adhesive tape and the semiconductor wafer surface protecting adhesive tape after peeling the semiconductor wafer surface protecting adhesive tape are observed with an optical microscope.
- the pseudo-stepped surface and the wafer bonding surface were not confirmed as dust, and when the wafer bonding surface was bonded, no discoloration was observed in the part corresponding to the kerf.
- dust was not confirmed on the pseudo step surface and the wafer bonding surface as a non-defective product, and dust was found on the pseudo step surface or wafer bonding surface.
- the confirmed product was marked as x as a defective product.
- the semiconductor wafer surface protecting adhesive tape of the present invention has an effect that the amount of kerf shift is reduced and the wafer can be processed and peeled without being contaminated or damaged.
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- Organic Chemistry (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Physics & Mathematics (AREA)
- Adhesive Tapes (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
- Dicing (AREA)
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Abstract
Description
(a)装置
ループステフネステスタ(商品名、株式会社東洋精機製作所製)
(b)ループ(試験片)形状
長さ50mm、幅10mm、試験片方向はテープMD方向
(c)圧子の押し込み速度
3.3mm/sec
(d)圧子の押し込み量
圧子がループと接触した時点から5mm押し込む
本発明の半導体ウエハ表面保護用粘着テープ1の基材樹脂フィルム2として、公知のプラスチック、ゴム等を用いることができる。基材樹脂フィルム2は、特に、粘着剤層4に放射線硬化性の組成物を使用する場合には、その組成物が硬化する波長の放射線の透過性の良いものを選択するのがよい。なお、ここで、放射線とは、例えば、紫外線のような光、あるいはレーザー光、または電子線のような電離性放射線を総称して言うものであり、以下、これらを総称して放射線と言う。
(a)装置
ループステフネステスタ(商品名、株式会社東洋精機製作所製)
(b)ループ(試験片)形状
長さ50mm、幅10mm、試験片方向はテープMD方向
(c)圧子の押し込み速度
3.3mm/sec
(d)圧子の押し込み量
圧子がループと接触した時点から5mm押し込む
図1に示すように、本実施の形態に係る半導体ウエハ表面保護用粘着テープ1は、基材樹脂フィルム2上に粘着剤層4が形成されている。
エチレン性不飽和基を有する樹脂はどのようなものでも構わないが、(メタ)アクリル樹脂が好ましい。樹脂中に含有する二重結合の量の指標であるヨウ素価は0.5~20であるものが好ましい。このヨウ素価はより好ましくは0.8~10である。ヨウ素価が0.5以上であると、放射線照射後の粘着力の低減効果を得ることができ、ヨウ素価が20以下であれば、過度の放射線硬化を防ぐことができる。また、エチレン性不飽和基を有する樹脂は、ガラス転移温度(Tg)が-70℃~0℃であることが好ましい。ガラス転移温度(Tg)が-70℃以上であれば、半導体ウエハ5の加工工程に伴う熱に対する耐熱性が増す。
架橋剤としては、ポリイソシアネート類、メラミン・ホルムアルデヒド樹脂または2個以上のエポキシ基を有するエポキシ化合物が好ましく、ポリイソシアネート類が特に好ましい。架橋剤は、単独でまたは2種類以上を組み合わせて使用することができる。架橋剤は樹脂ポリマーを架橋することにより、粘着剤の凝集力を、粘着剤塗布後に向上することができる。
粘着剤層4として放射線硬化型粘着剤を選定した場合には、必要に応じて光重合開始剤を含むことができる。光重合開始剤には基材を透過する放射線により反応するものであれば、特に制限はなく、従来知られているものを用いることができる。例えば、ベンゾフェノン、4,4’-ジメチルアミノベンゾフェノン、4,4’-ジエチルアミノベンゾフェノン、4,4’-ジクロロベンゾフェノン等のベンゾフェノン類、アセトフェノン、ジエトキシアセトフェノン等のアセトフェノン類、2-エチルアントラキノン、t-ブチルアントラキノン等のアントラキノン類、2-クロロチオキサントン、ベンゾインエチルエーテル、ベンゾインイソプロピルエーテル、ベンジル、2,4,5-トリアリ-ルイミダゾール二量体(ロフィン二量体)、アクリジン系化合物、アシルフォスフィンオキサイド類、等を挙げることができ、これらは単独で又は2種以上を組み合わせて用いることができる。 光重合開始剤の添加量は、エチレン性不飽和基を有する樹脂100質量部に対して0.1~10質量部とすることが好ましく、0.5~5質量部とすることがより好ましい。
粘着剤層4には必要に応じて粘着付与剤、粘着調整剤、界面活性剤等、あるいは改質剤等を配合することができる。また、無機化合物フィラーを適宜加えてもよい。本発明においては、改質剤を添加することも剥離性の観点から好ましい。改質剤はシリコーン化合物、フッ素系化合物、長鎖アルキル基含有化合物などを挙げることができ、添加により低角度における剥離力を低下させること、および、水に対する接触角が上がることにより、ダスト浸入抑制を抑制することが可能となる。改質剤の半導体ウエハ5表面への移行を防ぐため、改質剤はエチレン性不飽和基を有する化合物であることが望ましく、更に、粘着剤ベース樹脂が側鎖にエチレン性不飽和基を有する樹脂であることがより好ましい。エチレン性不飽和基を有する改質剤として、具体的には市販品として、シリコーンアクリレートであるEbecryl 360(ダイセル・オルネクス株式会社製)やフッ素系表面改質剤であるメガファックRS-72-K(DIC株式会社製)などが挙げられる。半導体ウエハ5表面への影響の観点から、フッ素系化合物であることがより好ましい。
また、本発明の表面保護用粘着テープには、必要に応じて剥離フィルムが粘着剤層4上に設けられる。剥離フィルムは、セパレータや剥離層、剥離ライナーとも呼ばれ、粘着剤層4を保護する目的のため、また粘着剤を平滑にする目的のために、設けられる。剥離フィルムの構成材料としては、ポリエチレン、ポリプロピレン、ポリエチレンテレフタレート等の合成樹脂フィルムや紙などが挙げられる。剥離フィルムの表面には粘着剤層4からの剥離性を高めるため、必要に応じてシリコーン処理、長鎖アルキル処理、フッ素処理等の剥離処理が施されていても良い。また、必要に応じて、粘着剤層4が環境紫外線等意図しない紫外線の暴露によって反応してしまわないように、紫外線防止処理が施すことも好ましい。剥離フィルムの厚みは、通常10~100μm、好ましくは25~50μm程度である。
本発明のウエハ加工用テープ1の使用用途としては、先ダイシング法または先ステルス法を用いた半導体ウエハ5の製造方法、例えば、以下の半導体ウエハ5の製造方法(A)~(B)において好適に使用できる。
(a)半導体ウエハ5の分断予定ラインに、前記半導体ウエハ5の表面から前記半導体ウエハ5の厚さ未満の溝7を形成する工程と、
(b)前記溝7が形成された前記半導体ウエハ5表面に、上述の半導体ウエハ表面保護用粘着テープ1を貼合する工程と、
(c)前記半導体ウエハ5裏面を研削することで、前記半導体ウエハ5を個片化する工程とを含む半導体ウエハ5の製造方法。
(a)半導体ウエハ5の分断予定ラインにおける前記半導体ウエハ5内部に、レーザーを照射することで改質領域を形成する工程と、
(b)前記(a)の工程の前または後に、半導体ウエハ5表面に上述の半導体ウエハ表面保護用粘着テープ1を貼合する工程と、
(c)前記半導体ウエハ5裏面を研削することで、前記半導体ウエハ5を個片化する工程を含むことを特徴とする半導体ウエハ5の製造方法。
次に、本発明の半導体ウエハ表面保護用粘着テープ1の使用方法、すなわち半導体ウエハ5の加工方法の一例について説明する。まず、図2に示すように、ブレード(図示しない)やレーザーを用いて半導体ウエハ5の表面側より半導体ウエハ5に最終製品厚さと同等以上の深さの溝7を形成した(溝切り工程)後、回路パターンが形成された半導体ウエハ5の表面に、半導体ウエハ表面保護用粘着テープ1の粘着剤層4を貼合する(保護テープ貼合工程)。
以下、本発明を実施例に基づきさらに詳細に説明するが、本発明はこれら実施例に限定されるものではない。
下記のように粘着剤組成物を調製し、以下の方法で半導体ウエハ表面保護用粘着テープを作製し、その性能を評価した。
[粘着剤層組成物2A]
2-エチルヘキシルアクリレート83質量部、2-ヒドロキシアクリレート16質量部、メタクリル酸1質量部からなる共重合体100質量部に対して、放射線反応基としてメタクリロイルオキシエチルイソシアネート10質量部を反応させ、ポリイソシアネートとしてコロネートL(商品名、日本ポリウレタン工業株式会社製)0.8質量部、光重合開始剤としてSPEEDCURE BKL(商品名、DKSHジャパン株式会社製)5.0質量部を加えて混合して、粘着剤組成物2Aを得た。
フッ素系改質剤としてメガファックRS-72-K(商品名、DIC株式会社製)を2質量部添加した以外は粘着剤組成物2Aと同様にして、粘着剤組成物2Bを得た。
シリコーン系改質剤としてEbecryl 360(商品名、ダイセル・オルネクス株式会社製)を0.2質量部添加した以外は粘着剤組成物2Aと同様にして、粘着剤組成物2Cを得た。
2-エチルヘキシルアクリレート80質量部、2-ヒドロキシアクリレート19質量部、メタクリル酸1質量部からなる共重合体100質量部に対して、5官能のウレタンアクリレートオリゴマー80質量部、3官能のウレタンアクリレートオリゴマー20質量部、ポリイソシアネートとしてコロネートL(商品名、日本ポリウレタン工業株式会社製)5.0質量部、光重合開始剤としてSPEEDCURE BKL(商品名、DKSHジャパン株式会社製)4.0質量部を加えて混合して、粘着剤組成物2Dを得た。
2-エチルヘキシルアクリレート80質量部、2-ヒドロキシアクリレート19質量部、メタクリル酸1質量部からなる共重合体100質量部に対して、5官能のウレタンアクリレートオリゴマー100質量部、3官能のウレタンアクリレートオリゴマー30質量部、ポリイソシアネートとしてコロネートL(商品名、日本ポリウレタン工業株式会社製)5.0質量部、光重合開始剤としてSPEEDCURE BKL(商品名、DKSHジャパン株式会社製)4.0質量部を加えて混合して、粘着剤組成物2Dを得た。
2-エチルヘキシルアクリレート80質量部、2-ヒドロキシアクリレート19質量部、メタクリル酸1質量部からなる共重合体100質量部に対して、ポリイソシアネートとしてコロネートL(商品名、日本ポリウレタン工業株式会社製)3.0質量部を加えて混合して、粘着剤組成物2Eを得た。
[実施例1]
厚さ38μm、引張弾性率2GPaの両面コロナ処理されたポリエチレンテレフタレートフィルムと、厚さ40μmのポリプロピレンフィルムを2μmの接着剤を用いて貼り合せ、合計80μmの積層基材樹脂フィルムを得た。次に、厚み38μmのポリエチレンテレフタレート(PET)のセパレータ上に、乾燥後の膜厚が30μmとなるように粘着剤組成物2Bを塗布し、乾燥させた後、上記80μmの積層基材樹脂フィルムのポリエチレンテレフタレート面と貼りあわせ、厚さ110μmの半導体ウエハ表面保護用粘着テープを得た。
粘着剤組成物として2Cを用いた以外は実施例1と同様の方法にて、厚さ110μmの半導体ウエハ表面保護用粘着テープを得た。
粘着剤組成物として2Aを用いた以外は実施例1と同様の方法にて、厚さ110μmの半導体ウエハ表面保護用粘着テープを得た。
粘着剤組成物として2Dを用いた以外は実施例1と同様の方法にて、厚さ110μmの半導体ウエハ表面保護用粘着テープを得た。
厚さ50μm、引張弾性率2GPaのポリエチレンテレフタレートフィルムの両面に、厚さ30μmとなるように低密度ポリエチレンフィルムを押出し成型し、低密度ポリエチレンの片面にコロナ処理を行い、合計110μmの積層基材フ樹脂ィルムを得た。次に、厚み38μmのポリエチレンテレフタレート(PET)のセパレータ上に、乾燥後の膜厚が20μmとなるように粘着剤組成物2Aを塗布し、乾燥させた後、上記110μmの積層基材樹脂フィルムのコロナ処理された低密度ポリエチレン面と貼りあわせ、厚さ130μmの半導体ウエハ表面保護用粘着テープを得た。
積層基材樹脂フィルムのポリエチレンテレフタレートフィルムを、厚さを25μm、引張弾性率2GPaのポリエチレンテレフタレートフィルムにした以外は実施例5と同様の方法にて、厚さ105μmの半導体ウエハ表面保護用粘着テープを得た。
厚さ50μm、引張弾性率2GPaの両面コロナ処理されたポリエチレンテレフタレートフィルムの片面に、厚さ10μmとなるように低密度ポリエチレンフィルムを押出し成型し、厚さ60μmの積層基材樹脂フィルムを得た。次に、厚み38μmのポリエチレンテレフタレート(PET)のセパレータ上に、乾燥後の膜厚が50μmとなるように粘着剤組成物2Fを塗布し、乾燥させた後、上記60μmの積層基材樹脂フィルムのポリエチレンテレフタレート面と貼りあわせた。更に、厚み38μmのポリエチレンテレフタレート(PET)のセパレータ上に、乾燥後の膜厚が20μmとなるように粘着剤組成物2Cを塗布し、乾燥させた後、上記中間体のセパレータを剥離した粘着剤組成物2F面に貼り合せ、厚さ130μmの半導体ウエハ表面保護用粘着テープを得た。
厚さ100μm、引張弾性率2GPaの両面コロナ処理されたポリエチレンテレフタレート基材樹脂フィルムの片面に、厚さ10μmとなるように低密度ポリエチレンフィルム押出し成型し、厚さ110μmの積層基材樹脂フィルムを得た。次に、厚み38μmのポリエチレンテレフタレート(PET)のセパレータ上に、乾燥後の膜厚が20μmとなるように粘着剤組成物2Fを塗布し、乾燥させた後、上記110μmの積層基材フィルムのポリエチレンテレフタレート面と貼りあわせた。更に、厚み38μmのポリエチレンテレフタレート(PET)のセパレータ上に、乾燥後の膜厚が20μmとなるように粘着剤組成物2Cを塗布し、乾燥させた後、上記中間体のセパレータを剥離した粘着剤組成物2F面に貼り合せ、厚さ150μmの半導体ウエハ表面保護用粘着テープを得た。
共押し出し製膜により、低密度ポリエチレン樹脂30μmとエチレン-酢酸ビニル共重合体80μmとの厚さ110μm、引張弾性率0.2GPaの積層基材樹脂フィルムを作製し、エチレン-酢酸ビニル共重合体面にコロナ処理を行った。次に、厚み38μmのポリエチレンテレフタレート(PET)のセパレータ上に、乾燥後の膜厚が20μmとなるように粘着剤組成物2Cを塗布し、乾燥させた後、上記110μmの積層基材フィルムのコロナ処理されたエチレン-酢酸ビニル共重合体面と貼りあわせ、厚さ130μmの半導体ウエハ表面保護用粘着テープを得た。
共押し出し製膜により、高密度ポリエチレン樹脂30μmとエチレン-酢酸ビニル共重合体80μmとの厚さ110μm、引張弾性率0.4GPaの積層基材樹脂フィルムを作製し、エチレン-酢酸ビニル共重合体面にコロナ処理を行った。次に、厚み38μmのポリエチレンテレフタレート(PET)のセパレータ上に、乾燥後の膜厚が20μmとなるように粘着剤組成物2Eを塗布し、乾燥させた後、上記110μmの積層基材樹脂フィルムのコロナ処理されたエチレン-酢酸ビニル共重合体面と貼りあわせ、厚さ130μmの半導体ウエハ表面保護用粘着テープを得た。
上記実施例及び比較例の半導体ウエハ表面保護用粘着テープについて、特性評価試験を下記のように行った。その結果を表1及び表2に示す。
各実施例及び各比較例で作製した半導体ウエハ表面保護用粘着テープを用いて、剥離角度30°における剥離力を測定した。
半導体ウエハ表面保護用粘着テープをから幅25mm、長さ300mmの試験片14(図10参照)を切り出した。JIS R 6253に規定する280番の耐水研磨紙で仕上げたJIS G 4305に規定する厚さ1.5mmのステンレス鋼(Steel Use Stainless、SUS)板上に、上記試験片14を2kgのゴムローラを3往復かけ圧着した。1時間放置後、半導体ウエハ表面保護用粘着テープ貼合面の基材樹脂フィルム背面より500mJ/cm2(照度40mW/cm2)の紫外線を照射し、更に1時間放置後、測定値がその容量の15~85%の範囲に入るJIS B 7721に適合するインストロン社製の引張試験機(ツインコラム卓上モデル5567)を用いて剥離力を測定した。詳細には、SUS板は図10のように、30°の傾斜をつけた土台15上に固定し、試験片14の端部をつかみ具16で把持して、引張速度20mm/min、25℃、相対湿度50%の条件で引っ張って測定した。各半導体ウエハ表面保護用粘着テープそれぞれに対して3回実施し、その算術平均値を求め、これを30°剥離力とした。SUS板を固定する土台15は剥離に合わせ駆動するよう調整し、常に剥離角度θが30°となるようにした。土台15が駆動式でない場合、30°よりも鋭角で測定を初め、剥離角度θが30°となった点の剥離力を読み取っても構わない。さらに、SUS板を傾斜のない土台に固定し、90°引きはがし法により剥離速度50mm/minで剥離した以外は上記と同様にして剥離角度90°における90°剥離力も求めた。粘着剤が感圧型の場合は、紫外線照射および照射後の1時間放置に替えて、SUS板を50℃に加熱した状態で同様に30°剥離力を測定した。
株式会社東洋精機製作所製のループステフネステスタ(商品名)を用いて、反発力αを測定した。各実施例及び各比較例で作製した半導体ウエハ表面保護用粘着テープを幅10mmにカットし試験片を作成し、セパレータを剥離した状態で、ループステフネステスタに設置した。その際、ループ長50mm以上の帯状の試験片の中央付近で、ループ長50mmの円形ループを粘着剤層が内側となるよう作り、この円形ループを外側から5mm押し込んだときにかかる荷重を測定した。このとき得られた荷重を幅当たりに換算し、mN/mm単位で表示した値を反発力αとした。各実施例及び各比較例で作製した半導体ウエハ表面保護用粘着テープについて、3サンプル評価を行い、算術平均した値を用いた。
各実施例及び各比較例で作製した半導体ウエハ表面保護用粘着テープを50mm×50mmに切り出した。切り出したサンプルからセパレータを剥がし、重量を測定した(浸漬前重量)。粘着剤を塗布していない基材樹脂フィルムも同様に50m×50mmに切り出し重量を測定した(基材重量)。重量測定後、カットサンプルをPh12の水酸化ナトリウム水溶液に平均粒径50nmのコロイダルシリカを14重量%分散させたCMPスラリーで満たされた500mlのポリプロピレン製容器に浸漬させ、24時間放置後、サンプルを容器から取り出し、純水で十分にスラリーを洗い流した。乾燥のため3日放置した後、サンプル重量を測定した(乾燥後重量)。ゲル分率は下記の計算式により求める。
ゲル分率=(乾燥後重量-基材重量)/(浸漬前重量-基材重量)×100 (%)
なお、基材重量は実測に代えて、密度×体積から計算で求めてもよい。
[カーフシフト]
厚さが725μmの8インチ径の半導体ウエハに、図9に示すように、半導体ウエハの回路パターンおよび切断予定部位に設けられた溝を模した疑似段差を、ダイサーを用いて形成した。具体的には、回路パターンの段差を疑似的に形成するために、60μm幅で10μm深さのラインを5mm間隔で格子状に設けた。さらに、切断予定部位に設けられた溝として、上記ライン幅の中央にさらに30μm幅で60μm深さの溝を設けた。
カーフ幅を観察後に、半導体ウエハ表面保護用粘着テープの基材フィルム側より500mJ/cm2の紫外線を照射させた。その後、半導体ウエハの研磨面にダイシングダイボンディングフィルムを貼合した。その後、半導体ウエハ表面保護用粘着テープの表面にヒートシールを接着し、半導体ウエハ表面保護用粘着テープを剥離した。目視によりチップ剥離の有無を確認し、全くチップ剥離が見られなかったものを良品として◎、最端部の正方形でないチップは剥離したが、内部の正方形チップは剥離しなかったものを良品として〇、正方形チップの一部もしくは全部が剥離したものを不良品として×とした。
更に、半導体ウエハ表面保護用粘着テープを剥離した後の半導体ウエハの擬似段差面を光学顕微鏡により観察した。半導体ウエハの擬似段差面に、半導体ウエハ表面保護用粘着テープの粘着剤の残渣が確認できなかったものを良品として○、一箇所でも残渣があったものを不良品として×とした。なお、比較例3については、ダスト浸入が多く見られたため、糊残りの判定が行なわなかった。
また、半導体ウエハ表面保護用粘着テープを剥離した後の半導体ウエハの擬似段差面及び半導体ウエハ表面保護用粘着テープを剥離した後の半導体ウエハ表面保護用粘着テープのウエハ貼合面を光学顕微鏡により観察し、擬似段差面、ウエハ貼合面ともダストが確認されず、ウエハ貼合面の貼合時にカーフに対応していた部分の変色も見られなかったものを良品として◎、ウエハ貼合面の貼合時にカーフに対応していた部分の変色が見られたものの、擬似段差面、ウエハ貼合面ともダストが確認されなかったものを良品として〇、擬似段差面またはウエハ貼合面にダストが確認されたものを不良品として×とした。
[ウエハの反り]
ポリイミドを5μmコーティングした厚さ780μmの8inchのウエハに、貼合機として日東精機株式会社製のDR8500II(商品名)を用いて、各実施例及び各比較例の半導体ウエハ表面保護用粘着テープを貼合し、グラインダーとして株式会社ディスコ社製のDGP8760(商品名)を用いて、ウエハ厚さ50μmまで研削した。各半導体ウエハ表面保護用粘着テープにつきウエハ4枚を研削し、グラインダー装置内での搬送過程においてウエハの反りに起因する搬送エラーが1枚も発生しなかったものを良品として〇、ウエハの反りに起因する搬送エラーが1枚でも発生したものを不良品として×とした。
2:基材樹脂フィルム
4:粘着剤層
5:半導体ウエハ
6:ダイシングテープ
7:溝
8:研削装置
9:リングフレーム
11:チップ
Claims (10)
- 基材樹脂フィルムと、前記基材樹脂フィルムの少なくとも片面側に形成された放射線硬化性の粘着剤層とを有し、
前記基材樹脂フィルムは、引張弾性率が1~10GPaである剛性層を少なくとも1層有し、
前記粘着剤層を放射線硬化させた後における、JIS R 6253に規定する280番の耐水研磨紙で仕上げたJIS G 4305に規定する厚さ1.5mmのステンレス鋼(Steel Use Stainless、SUS)に対する剥離角度30°での剥離力が、0.1~3.0N/25mmであることを特徴とする半導体ウエハ表面保護用粘着テープ。 - 基材樹脂フィルムと、前記基材樹脂フィルムの少なくとも片面側に形成され、放射線の照射により硬化することのない粘着剤層とを有し、
前記基材樹脂フィルムは、引張弾性率が1~10GPaである剛性層を少なくとも1層有し、
50℃における、JIS R 6253に規定する280番の耐水研磨紙で仕上げたJIS G 4305に規定する厚さ1.5mmのステンレス鋼(Steel Use Stainless、SUS)に対する剥離角度30°での剥離力が、0.1~3.0N/25mmであることを特徴とする半導体ウエハ表面保護用粘着テープ。 - 下記条件(a)~(d)で測定したループスティフネスの負荷荷重から求められた、単位幅当りの反発力が2~15mN/mmであることを特徴とする請求項1または請求項2に記載の半導体ウエハ表面保護用粘着テープ。
(a)装置
ループステフネステスタ(商品名、株式会社東洋精機製作所製)
(b)ループ(試験片)形状
長さ50mm、幅10mm、試験片方向はテープMD方向
(c)圧子の押し込み速度
3.3mm/sec
(d)圧子の押し込み量
圧子がループと接触した時点から5mm押し込む - 前記剛性層と前記粘着剤層との間の層が、引張弾性率が1GPa未満の層のみからなり、前記粘着剤層の厚さと前記引張弾性率が1GPa未満の層の厚さの合計が60μm以下であることを特徴とする請求項1から請求項3のいずれか一項に記載の半導体ウエハ表面保護用粘着テープ。
- 前記粘着剤層は、pH12の水酸化ナトリウム水溶液に平均粒径50nmのコロイダルシリカを14重量%分散させた化学機械研磨用のスラリーに24時間浸漬後の不溶分の前記スラリーに浸漬する前に対する割合が75%以上であることを特徴とする請求項1から請求項4のいずれか一項に記載の半導体ウエハ表面保護用粘着テープ。
- 前記粘着剤層が側鎖にエチレン性不飽和基を有する放射性反応性樹脂を含有し、放射線を照射することにより、前記放射性反応性樹脂と反応し剥離力を低下させるための改質剤を含むことを特徴とする請求項1に記載の半導体ウエハ表面保護用粘着テープ。
- 前記改質剤が、非シリコーン系であることを特徴とする請求項6に記載の半導体ウエハ表面保護用粘着テープ。
- (a)半導体ウエハの分断予定ラインに、前記半導体ウエハの表面から前記半導体ウエハの厚さ未満の溝を形成する工程と、(b)前記溝が形成された前記半導体ウエハ表面に、請求項1から請求項7のいずれか一項に記載の半導体ウエハ表面保護用粘着テープを貼合する工程と、 (c)前記半導体ウエハ裏面を研削することで、前記半導体ウエハを個片化する工程とを含むことを特徴とする半導体ウエハの製造方法。
- (a)半導体ウエハの分断予定ラインにおける前記半導体ウエハ内部に、レーザーを照射することで改質領域を形成する工程と、(b)前記(a)の工程の前または後に、半導体ウエハ表面に請求項1から請求項7のいずれか一項に記載の半導体ウエハ表面保護用粘着テープを貼合する工程と、(c)前記半導体ウエハ裏面を研削することで、前記半導体ウエハを個片化する工程を含むことを特徴とする半導体ウエハの製造方法。
- 前記(c)の工程は、化学的研磨を行う工程を含むことを特徴とする請求項8または請求項9に記載の半導体ウエハの製造方法。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201580083004.3A CN108028190A (zh) | 2015-10-29 | 2015-10-29 | 半导体晶圆表面保护用粘合带及半导体晶圆的加工方法 |
| KR1020177035910A KR20180039020A (ko) | 2015-10-29 | 2015-10-29 | 반도체 웨이퍼 표면 보호용 점착 테이프 및 반도체 웨이퍼의 가공 방법 |
| PCT/JP2015/080498 WO2017072901A1 (ja) | 2015-10-29 | 2015-10-29 | 半導体ウエハ表面保護用粘着テープおよび半導体ウエハの加工方法 |
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| PCT/JP2015/080498 WO2017072901A1 (ja) | 2015-10-29 | 2015-10-29 | 半導体ウエハ表面保護用粘着テープおよび半導体ウエハの加工方法 |
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| WO2017072901A1 true WO2017072901A1 (ja) | 2017-05-04 |
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| PCT/JP2015/080498 Ceased WO2017072901A1 (ja) | 2015-10-29 | 2015-10-29 | 半導体ウエハ表面保護用粘着テープおよび半導体ウエハの加工方法 |
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| KR (1) | KR20180039020A (ja) |
| CN (1) | CN108028190A (ja) |
| WO (1) | WO2017072901A1 (ja) |
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| CN111693368A (zh) * | 2020-06-15 | 2020-09-22 | 苏州高泰电子技术股份有限公司 | 用于晶圆切割胶带微观表征性能的测试方法 |
| CN113616017A (zh) * | 2021-09-08 | 2021-11-09 | 今创集团股份有限公司 | 一种背靠背座椅及该背靠背座椅的制作方法 |
| JP2024023716A (ja) * | 2018-11-28 | 2024-02-21 | グンゼ株式会社 | バックグラインドテープ用の用基体フィルム |
| US20240258150A1 (en) * | 2021-05-28 | 2024-08-01 | Mitsui Chemicals Tohcello, Inc. | Method for manufacturing electronic device |
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| JP6790025B2 (ja) * | 2018-05-31 | 2020-11-25 | 古河電気工業株式会社 | 電子デバイス加工用テープおよび電子デバイス加工用テープの製造方法 |
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| CN116157486A (zh) * | 2020-07-22 | 2023-05-23 | 三井化学东赛璐株式会社 | 背面研磨用粘着性膜及电子装置的制造方法 |
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| WO2022019166A1 (ja) * | 2020-07-22 | 2022-01-27 | 三井化学東セロ株式会社 | 電子装置の製造方法 |
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| KR102660802B1 (ko) * | 2021-08-11 | 2024-04-26 | (주)이녹스첨단소재 | 웨이퍼 처리용 점착 필름 |
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| CN111693368A (zh) * | 2020-06-15 | 2020-09-22 | 苏州高泰电子技术股份有限公司 | 用于晶圆切割胶带微观表征性能的测试方法 |
| US20240258150A1 (en) * | 2021-05-28 | 2024-08-01 | Mitsui Chemicals Tohcello, Inc. | Method for manufacturing electronic device |
| EP4350741A4 (en) * | 2021-05-28 | 2025-05-14 | Mitsui Chemicals Tohcello, Inc. | METHOD FOR MANUFACTURING AN ELECTRONIC DEVICE |
| CN113616017A (zh) * | 2021-09-08 | 2021-11-09 | 今创集团股份有限公司 | 一种背靠背座椅及该背靠背座椅的制作方法 |
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|---|---|
| KR20180039020A (ko) | 2018-04-17 |
| CN108028190A (zh) | 2018-05-11 |
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