WO2013065981A1 - 절단성이 우수한 반도체 웨이퍼 표면보호용 점착필름 - Google Patents
절단성이 우수한 반도체 웨이퍼 표면보호용 점착필름 Download PDFInfo
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- WO2013065981A1 WO2013065981A1 PCT/KR2012/008666 KR2012008666W WO2013065981A1 WO 2013065981 A1 WO2013065981 A1 WO 2013065981A1 KR 2012008666 W KR2012008666 W KR 2012008666W WO 2013065981 A1 WO2013065981 A1 WO 2013065981A1
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- film
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- semiconductor wafer
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- 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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6835—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L21/6836—Wafer tapes, e.g. grinding or dicing support tapes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J5/00—Manufacture of articles or shaped materials containing macromolecular substances
- C08J5/18—Manufacture of films or sheets
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/0427—Coating with only one layer of a composition containing a polymer binder
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/043—Improving the adhesiveness of the coatings per se, e.g. forming primers
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/04—Coating
- C08J7/046—Forming abrasion-resistant coatings; Forming surface-hardening coatings
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J7/00—Chemical treatment or coating of shaped articles made of macromolecular substances
- C08J7/12—Chemical modification
- C08J7/16—Chemical modification with polymerisable compounds
- C08J7/18—Chemical modification with polymerisable compounds using wave energy or particle radiation
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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
-
- 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
- C09J7/40—Adhesives in the form of films or foils characterised by release liners
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J2375/00—Characterised by the use of polyureas or polyurethanes; Derivatives of such polymers
- C08J2375/04—Polyurethanes
- C08J2375/14—Polyurethanes having carbon-to-carbon unsaturated bonds
- C08J2375/16—Polyurethanes having carbon-to-carbon unsaturated bonds having terminal carbon-to-carbon unsaturated bonds
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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
-
- 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
-
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/67—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
- H01L2221/683—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L2221/68304—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L2221/68327—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used during dicing or grinding
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2221/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof covered by H01L21/00
- H01L2221/67—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere
- H01L2221/683—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L2221/68304—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support
- H01L2221/6834—Apparatus for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components; Apparatus not specifically provided for elsewhere for supporting or gripping using temporarily an auxiliary support used to protect an active side of a device or wafer
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/266—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension of base or substrate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/28—Web or sheet containing structurally defined element or component and having an adhesive outermost layer
Definitions
- the present invention relates to a pressure-sensitive adhesive film for semiconductor wafers with a pressure-sensitive adhesive layer formed on one surface of the base film.
- the adhesive film for semiconductor wafer protection should be cut well without resistance under any conditions when the film is cut into wafer shape, and this property is called cutting or cutting property.
- the cutting property is not secured after actually applying the wafer, and the wafer has a problem in that warpage occurs a lot.
- Korean Laid-Open Patent No. 2003-0061300 although the lecture degree according to the temperature is described, the solution of the above problem is still not secured.
- the pressure-sensitive adhesive used as a wafer protection film does not contribute much to the cutting property because of its thin thickness, but the polymer film used as the base film makes a very big contribution, thereby increasing the wafer chip yield by securing the cutting property of the base film. It is urgent that the invention of the method which can be made.
- Still another object of the present invention is to provide a pressure-sensitive adhesive film for protecting a semiconductor wafer surface and a method of manufacturing the same, which prevents warpage and cracking of the wafer even if the wafer becomes thin.
- a pressure-sensitive adhesive film for protecting a semiconductor wafer with an adhesive layer formed on one surface of the base film the tensile strength of the base film is 2 ⁇ 10kg / mm 2 , the elongation at break is 50 ⁇ 200%, the adhesive layer It provides a pressure-sensitive adhesive film for semiconductor wafer surface protection, characterized in that the gel content of 80% or more.
- forming a base film Controlling tensile strength and elongation at break of the base film; Forming an adhesive layer on one surface of the base film; And it provides a method for producing a pressure-sensitive adhesive film for semiconductor wafer surface protection comprising the step of ultraviolet curing (UV) the base film on which the pressure-sensitive adhesive layer is formed.
- UV ultraviolet curing
- the adhesive film for protecting a wafer having an adhesive layer formed on one surface of the base film ensures cutting property and cutting property, and does not occur such as melting at high temperature, thereby improving the yield during wafer grinding.
- the resistance to cutting can be reduced and the cutting property to maintain a clean surface can be secured.
- the wafer becomes thin it is possible to minimize the occurrence of warpage and to prevent the wafer from breaking.
- the present invention provides a semiconductor wafer protective adhesive film having an adhesive layer formed on one surface of a base film.
- the tensile strength and the elongation at break must be within an optimized range.
- the tensile strength of the base film may be 2 ⁇ 10kg / mm 2
- the elongation at break may be 50 ⁇ 200%.
- the resistance is low when cutting, it is to ensure a very clean cutting. If the tensile strength is less than 2kg / mm 2 it is considered that the base film is soft and receded, the resistance to cutting can be increased.
- the tensile strength exceeds 10kg / mm 2 , the film itself is reduced in the ability to absorb the impact when peeling, the wafer thinner during grinding may cause curl.
- Elongation at break is also an important factor.
- the range can be 50-200%. If the elongation at break is less than 50%, it is likely to curl and become thinner during wafer grinding in line with the higher tensile strength. In addition, when the elongation at break exceeds 200%, it suggests that the polymer array is elongated in that direction, thereby increasing the resistance to cutting.
- the base film is at least one base film selected from the group consisting of polyvinyl chloride (PVC) film, polyurethane film, polyolefin film, ethylene-vinyl acetate (EVA) copolymer film, ethylene-alkyl acrylate copolymer film It can be characterized by.
- PVC polyvinyl chloride
- EVA ethylene-vinyl acetate
- the thickness of the base film affects the strength of the film itself and also prevents wafer breakage during backside processing, it is preferable to select an appropriate thickness according to the surface level of the wafer, the presence or absence of bump electrodes, and the like. .
- the thickness of a base film about 50-300 micrometers is preferable. Especially the thickness of a base film can be about 100-200 micrometers. If the thickness of the base film is too thin, the strength of the film itself becomes weak, and the adhesive film cannot sufficiently follow the projections on the wafer surface, resulting in insufficient adhesion to the projections, and the back surface of the wafer When grinding, dimples may occur in the back surface of the wafer corresponding to the projection.
- the pressure-sensitive adhesive layer formed on one surface of the base film of the present invention has a gel content of 80% or more.
- the gel content of the adhesive layer is preferably 80 to 99% in that cutting properties and cutting properties can be secured due to an increase in hardness of the polymer.
- the gel content of the adhesive layer is less than 80%, the film is soft and the cutting property is lowered, thereby increasing the possibility of burr generation, and unreacted components may protrude to the surface and cause blocking when stored for a long time in a film roll state.
- the gel content of the adhesive layer exceeds 99%, the film is hardened, so the cutting property is excellent, but the wafer may not absorb the impact and the yield may be lowered due to the increased occurrence of curl.
- the gel content represents the gel content measured after soaking the resin composition constituting the adhesive layer in a polar solvent for 48 hours and drying at 110 ° C. for 2 hours, as shown in Equation 1 below.
- Xi is the initial weight
- Xs is the weight of organic matter remaining in the wire mesh after drying at 110 ° C. for 2 hours after filtering in 300 mesh wire mesh after dissolving in solvent.
- X means the gel content mentioned in the present invention.
- the sol fraction may be dissolved and separated, but the separation time may be sufficient for about 24 to 48 hours, so that only the gel fraction remains, and the polar solvent used in the present invention is not limited as long as it has a slight polarity.
- Particularly preferred examples include chloroform, ethyl acetate, acetone, methanol, ethanol, isopropanol, butanol, dimethylformamide and the like.
- the resin composition which forms the adhesion layer of the adhesive film for semiconductor wafer protection by this invention fully functions as an adhesive also in the temperature conditions which heat a semiconductor wafer, for example about 150 degreeC.
- adhesive force rises and it does not produce a peeling defect or a residue does not arise after peeling.
- the resin composition may include a silicone-based or acrylic-based resin composition.
- an acrylic resin composition is preferable, and an ultraviolet irradiation type is most commonly used as the acrylic resin composition.
- the ultraviolet irradiation type is typically applied when the wafer is thinned, when the thickness of the wafer is 100 ⁇ m or less after the calculation.
- the said resin composition is hydrophobic, and when water solubility, the hardened
- cured material of the resin composition does not swell or partially melt
- the thickness of the said adhesion layer is 3-300 micrometers.
- the adhesion layer does not produce the contamination by pool residue etc. on the surface of a semiconductor wafer.
- the adhesive layer has a reactive functional group so that the adhesive force does not become too large and the contamination of the surface of the semiconductor wafer does not increase even after the heating step after the adhesive film for protecting the semiconductor wafer is adhered to the circuit forming surface of the semiconductor wafer. It is preferable to crosslink at high density by a crosslinking agent, peroxide, radiation or the like.
- the adhesive film according to the present invention is characterized in that the peeling force before ultraviolet irradiation is greater than the peeling force after ultraviolet irradiation. More specifically, the peeling force before ultraviolet irradiation may be 400-1200 g / in, and the peeling force after ultraviolet irradiation may be 20-200 g / in.
- the peeling force before the ultraviolet irradiation of the adhesive film is less than 400g / in the initial peeling force is low and likely to be immersed, when exceeding 1200g / in, the initial adhesive force is high and the wafer is too firmly held the residue after UV irradiation Or burrs are more likely to occur due to the presence of soft or adhesive layers, and the wafer becomes thinner after the grinding process.
- the peeling force after the ultraviolet irradiation of the pressure-sensitive adhesive film is less than 20g / in, the desorption occurs naturally during handling of the UV-irradiated wafer, the surface of the wafer is likely to be contaminated. It is unlikely that the wafer will break.
- the present invention is a step of forming a base film; Controlling tensile strength and elongation at break of the base film; Forming an adhesive layer on one surface of the base film; And it provides a method for producing a pressure-sensitive adhesive film for semiconductor wafer surface protection comprising the step of ultraviolet curing (UV) the base film on which the pressure-sensitive adhesive layer is formed.
- UV ultraviolet curing
- the process of forming the base film may include an extrusion process, an ultraviolet curing process, a casting process, a calendaring process, a thermosetting process and the like.
- an acrylic film is formed through ultraviolet curing, and an ethylene-vinyl acetate copolymer film and a polyolefin film may be formed by an extrusion process, and a polyurethane film may be formed by a thermosetting process.
- the polyvinyl chloride film may be formed by a casting process or a calendering process.
- the process of controlling the tensile strength and elongation at break of the base film is characterized by controlling the tensile strength to 2 ⁇ 10kg / mm 2 , the elongation at break to 50 ⁇ 200%.
- tensile strength and elongation at break can be controlled by irradiating an electromagnetic wave or plasma treatment to the film.
- the step of controlling the tensile strength and elongation at break of the base film may be characterized in that the electromagnetic film irradiation or plasma treatment on the base film.
- the electromagnetic beam refers to gamma rays, X rays, ultraviolet rays, electron beams, and the like, but ultraviolet rays and electron beams are preferable.
- ultraviolet rays are preferable because they are easy to handle and high energy is easily obtained, and any ultraviolet light source can be used.
- a low pressure mercury lamp, a medium pressure mercury lamp, a high pressure mercury lamp, an ultra high pressure mercury lamp, a carbon arc, a metal halide lamp, a xenon lamp, etc. can be used.
- an ArF excimer laser, a KrF excimer laser, an excimer lamp or a xenon lamp may be used.
- ArF excimer lasers, KrF excimer lasers, excimer lamps or synchrotron radiation can also be used.
- irradiation conditions differ with each lamp
- electron beams that can be used include electron beams having energy emitted from various electron beam accelerators such as cocroft Walton type, van degraf type, resonance transformer type, insulation core transformer type, linear type, dynamtron type, and high frequency type. Can be.
- an acceleration voltage selects an appropriate acceleration voltage according to film thickness and the depth which wants to process. It is preferable that acceleration voltage is 50 kV or more.
- irradiation dose it is preferable to select an appropriate irradiation dose according to desired film physical property. It is preferable that irradiation dose is 50-1000 kGy. If the radiation dose is outside the above range it is likely that the film is too soft or stiff, which makes it difficult to control the desired cutting and curl, and can also cause performance degradation if too much radiation dose is applied to the film.
- Plasma treatment is particularly preferably performed by atmospheric plasma treatment, and rare gases such as helium and argon or discharge gases such as nitrogen and air, and oxygen, hydrogen, nitrogen, carbon monoxide, carbon dioxide, nitrogen monoxide, nitrogen dioxide, water vapor and methane as necessary. And a reaction gas containing at least one of tetrafluoromethane and the like can be used.
- rare gases such as helium and argon or discharge gases such as nitrogen and air, and oxygen, hydrogen, nitrogen, carbon monoxide, carbon dioxide, nitrogen monoxide, nitrogen dioxide, water vapor and methane as necessary.
- a reaction gas containing at least one of tetrafluoromethane and the like can be used.
- the process of controlling the tensile strength and elongation at break may vary.
- the cutting property is poor due to the arrangement of the polymer chain, and thus electron beam curing is required.
- the arrangement of the polymer chain is Since it has a relatively even distribution, it is excellent in cutting property, and it can ensure cutting property and cutting property even if it is not based on an electron beam.
- the film which does not irradiate with an electron beam is preferable as a film laminated
- a polyethylene an ethylene-vinyl acetate copolymer, an ethylene- alkylacrylate copolymer ( The alkyl group has 1 to 4 carbon atoms), an ethylene- ⁇ -
- the adhesion layer forming method a conventionally known method, for example, a roll coater method, a reverse roll coater method, a gravure roll method, a bar coat method, a comma coater method, a die coater method, or the like can be adopted.
- a drying condition of the formed adhesion layer In general, it is preferable to dry for 10 second-10 minutes in the temperature range of 80-200 degreeC. More preferably, it is dried at 80-170 degreeC for 15 second-5 minutes.
- the adhesive layer may include a silicone-based or acrylic resin composition, as described above. More specifically, ethylhexyl acrylate (2-EHA: 2-ethyl hexylacrylate), ethyl hexyl methacrylate (2-EHMA: 2-ethyl hexyl methacrylate), hydroxy ethyl acrylate (2-HEA: 2-Hydroxy ethyl acrylate ) And acrylic acid monomers may be copolymerized by a solution polymerization method under a solvent to prepare a resin composition having a hydroxyl group.
- the base film in which the adhesion layer was formed may include the process of ultraviolet-ray (UV) hardening.
- UV ultraviolet-ray
- the lamination process is performed after lamination on the wafer prior to the wafer grinding process, and then the UV protection is performed to lower the peeling force and then artificially protect the film.
- the wafer grinding process is completed by stripping off the wafer.
- thermosetting agent when acrylic acid is used as the functional group, a resin composition having an aziridine group and an epoxy group is used as the thermosetting agent, and when a hydroxyl group is used as the functional group, an isocyanate group is used as the thermosetting agent.
- Primary thermosetting is performed using the resin composition which has.
- the photoinitiator is added to the resin composition to induce a curing reaction by ultraviolet irradiation to the branched double bonds that have not yet participated in the reaction, thereby obtaining a lower peeling force than the primary heat curing.
- the peeling force before UV curing is a thermosetting state
- the peeling force after UV curing is a value obtained by measuring the peeling force after attaching a thermosetting adhesive film to a wafer and irradiating ultraviolet rays.
- the peeling force before the ultraviolet irradiation of the adhesive film is 400 ⁇ 1200g / in
- the peeling force after the ultraviolet irradiation is preferably 20 ⁇ 150g / in.
- the type of the base film was changed, and tensile strength and elongation at break were controlled differently according to the process in which the base film was formed, and the cutting property and the cutting property of the base film were measured.
- Example 1 Example 2
- Example 3 Example 4
- Example 6 Base Film EVA Acrylic film Polyolefin film PVC PVC Polyurethane film Substrate Forming Process Extrusion UV curing Extrusion casting Calendaring Thermosetting Electron beam (kGy) 500 - 50 - 100 - Tensile Strength (kg / mm 2 ) 6 3 8 9 4 5.0 Elongation at Break (%) 50 100 120 80 110 180
- the base film of [Table 1] and [Table 2] having a thickness of 100 ⁇ m was prepared in a size of 5 cm ⁇ 1 cm in width / length, and the tensile test was carried out under a load of 30 kg of load cell by holding the upper and lower parts with jig in a tensile tester. .
- the horizontal axis represents distance and the vertical axis represents a force curve, and the elongation at break was measured, and the maximum force at break was measured as tensile strength.
- the final cutting property was determined to be good when the film was torn without any resistance when the center portion of the specimen prepared with a size of 10 cm ⁇ 10 cm was scratched with a very sharp knife and spread from side to side. However, if it was torn but difficult to open, the presence of burrs was observed.
- Curl was evaluated by applying a 20um adhesive to the base film, and deposited on a 10cmx 10cm size aluminum sheet having a thickness of 50um and then left at 100 °C for about 10 minutes to take out the room temperature to evaluate the degree of bending the aluminum sheet. Curl was formed when the aluminum sheet was bent due to curling at the edge portion exceeding about 2 mm from the bottom, and if it was less than about 2 mm, no curl was considered.
- the tensile strength of the base film is 2 ⁇ 10kg / mm2
- the elongation at break is out of the range of 50 ⁇ 200%, too large or too small when the burr occurs and curl occurs
- the cutability and cutability could not be secured.
- this showed a different aspect depending on the material of the base film, when the tensile strength and elongation at break is out of the above range, it was found that the tendency of poor cutting and cutability is the same.
- the method of controlling the tensile strength and elongation at break varies according to the method of forming the base film, so that even if the electron beam is not irradiated, the tensile strength and the elongation at break of the base film can be sufficiently cut to meet the mechanical properties within the scope of the present invention. It was confirmed that sex and cleavability were maintained.
- Example 1 Example 2
- Example 3 Example 4
- Example 5 Machinability Good Good Good Good Good Good Curl none none none none none none none none none
- the base film was formed by changing the type of base film, and an adhesive layer was formed on one surface of the formed base film by a comma coater method.
- the adhesive layer comprises an acrylic resin composition, wherein the resin composition comprises 60 parts by weight of ethylhexyl acrylate, 20 parts by weight of methyl acrylate, and 20 parts by weight of hydroxy ethyl acrylate based on 100 parts by weight of the total resin composition. do.
- the resin composition was mixed with a solvent ethyl acetate, 0.01 part by weight of a thermal initiator 2,2-azobisisobutyroni-trile (AIBN, Japan) was added to the total resin composition, and the temperature was raised to 60 ° C. for 8 hours.
- the reaction was carried out to polymerize the resin composition with a polymer resin having a molecular weight of 500,000.
- MOI Metaloyloxyethyl Isocyanate
- NCO isocyanate
- the prepared pressure-sensitive adhesive layer was transferred to the base films of Examples and Comparative Examples of [Table 5] and [Table 6], and the pressure-sensitive adhesive film for semiconductor wafer surface protection in a semi-cured state was prepared after aging at 40 ° C. for 3 days. .
- Example 7 Example 6
- Example 9 Base Film EVA Acrylic film Acrylic film Substrate Forming Process
- Extrusion UV curing UV curing Thermoset HDI 1.0 parts by weight 1.5 parts by weight 2.0 parts by weight Igacure 651 5.0 parts by weight 5.0 parts by weight 5.0 parts by weight
- the adhesive film prepared as shown in [Table 5] and [Table 6] was cut into 1 cm width 10 cm and attached to the polyimide by reciprocating five times with a 2 kg roller. After 30 minutes, the UTM (Universal Testing Machine) The peeling force before ultraviolet irradiation was measured by making peeling rate 300 mm / min. Thereafter, energy of 1500 mJ / cm 2 ultraviolet rays was irradiated in a state of being attached to the polyimide surface, and the peeling force after ultraviolet irradiation was measured in the same manner.
- the adhesive films were immersed in a tray containing water in a state before ultraviolet irradiation and maintained for 24 hours to observe whether or not water immersion occurred. On the other hand, after taking out the specimen in the state of water and left at room temperature for 24 hours, after completely drying the water and irradiated with ultraviolet rays again, peeling off the protective film and observed whether the residue on the polyimide substrate was recorded.
- the gel content was measured by dipping the adhesive layer formed on one surface of the substrate film in ethyl acetate for 1 day and then filtering at 300 mesh for 2 hours at 110 °C, weight loss degree.
- the resin composition constituting the adhesive layer formed on one side of the base film maintains a constant gel content, thereby forming Since the adhesive film had a peel force of a predetermined range before or after ultraviolet irradiation, it was found that the grinding process was smoothly performed during wafer processing.
- Example 7 Example 8
- Example 9 Peeling force before UV irradiation 850 g / in 740 g / in 550 g / in Peeling force after UV irradiation 110 g / in 85 g / in 70 g / in Immersion none none none Residue none none none Adhesive layer gel content (%) 95 85 80
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- Polymers & Plastics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
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- General Physics & Mathematics (AREA)
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- Microelectronics & Electronic Packaging (AREA)
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Abstract
Description
실시예1 | 실시예2 | 실시예3 | 실시예4 | 실시예5 | 실시예6 | |
기재필름 | EVA | 아크릴필름 | 폴리올레핀필름 | PVC | PVC | 폴리우레탄 필름 |
기재형성공정 | 압출 | 자외선경화 | 압출 | 캐스팅 | 캘린더링 | 열경화 |
전자빔(kGy) | 500 | - | 50 | - | 100 | - |
인장강도(kg/mm2) | 6 | 3 | 8 | 9 | 4 | 5.0 |
파단신율(%) | 50 | 100 | 120 | 80 | 110 | 180 |
비교예1 | 비교예2 | 비교예3 | 비교예4 | 비교예5 | 비교예6 | |
기재필름 | EVA | 아크릴필름 | 폴리올레핀필름 | PVC | PVC | 폴리우레탄필름 |
기재형성공정 | 압출 | 자외선 경화 | 압출 | 캐스팅 | 캘린더링 | 열경화 |
전자빔(kGy) | 200 | 500 | 30 | 30 | - | 600 |
인장강도(kg/mm2) | 1.5 | 13 | 6 | 16 | 1.0 | 28 |
파단신율(%) | 400 | 30 | 250 | 10 | 300 | 5 |
실시예1 | 실시예2 | 실시예3 | 실시예4 | 실시예5 | 실시예6 | |
커팅성 | 양호 | 양호 | 양호 | 양호 | 양호 | 양호 |
Curl | 없음 | 없음 | 없음 | 없음 | 없음 | 없음 |
비교예1 | 비교예2 | 비교예3 | 비교예4 | 비교예5 | 비교예6 | |
커팅성 | 불량 | 양호 | 불량 | 양호 | 불량 | 양호 |
Curl | 없음 | 심함 | 없음 | 심함 | 없음 | 심함 |
실시예7 | 실시예6 | 실시예9 | |
기재필름 | EVA | 아크릴필름 | 아크릴필름 |
기재형성공정 | 압출 | 자외선경화 | 자외선경화 |
열경화제 HDI | 1.0중량부 | 1.5중량부 | 2.0중량부 |
이가큐어 651 | 5.0중량부 | 5.0중량부 | 5.0중량부 |
비교예7 | 비교예8 | 비교예9 | |
기재필름 | EVA | 아크릴필름 | 아크릴필름 |
기재형성공정 | 압출 | 자외선경화 | 자외선경화 |
열경화제 HDI | 0.3중량부 | 0.1중량부 | 4.5중량부 |
이가큐어 651 | 5.0중량부 | 5.0중량부 | 5.0중량부 |
실시예7 | 실시예8 | 실시예9 | |
UV조사전 박리력 | 850g/in | 740g/in | 550g/in |
UV조사후 박리력 | 110g/in | 85g/in | 70g/in |
수침 | 없음 | 없음 | 없음 |
잔사 | 없음 | 없음 | 없음 |
점착제층 겔함량(%) | 95 | 85 | 80 |
비교예7 | 비교예8 | 비교예9 | |
UV조사전 박리력 | 1800g/in | 2200g/in | 230g/in |
UV조사후 박리력 | 150g/in | 180g/in | 63g/in |
수침 | 없음 | 없음 | 발생 |
잔사 | 발생 | 발생 | 없음 |
점착제층 겔함량(%) | 40 | 68 | 38 |
Claims (9)
- 기재 필름의 한쪽 표면에 점착층이 형성된 반도체 웨이퍼 보호용 점착 필름으로서, 상기 기재필름의 인장강도가 2~10kg/mm2 파단신율이 50~200% 이고, 상기 점착층의 겔 함량이 80%이상 인 것을 특징으로 하는 반도체 웨이퍼 표면보호용 점착필름.
- 제 1항에 있어서,상기 점착필름은 자외선 조사전 박리력이 자외선 조사후의 박리력보다 큰 것을 특징으로 하는 반도체 웨이퍼 표면보호용 점착필름.
- 제 1항에 있어서,상기 점착필름의 자외선 조사전 박리력은 400~1200g/in, 자외선 조사후 박리력은 20~200g/in인 것을 특징으로 하는 반도체 웨이퍼 표면보호용 점착필름.
- 제 1항에 있어서,상기 기재필름이 폴리비닐클로라이드 필름, 폴리우레탄 필름, 폴리올레핀 필름, 에틸렌-초산비닐 공중합체 필름, 에틸렌-알킬아크릴레이트 공중합체 필름으로이루어진 군으로부터 선택된 적어도 1종의 기재필름 인 것을 특징으로 하는 반도체웨이퍼 표면보호용 점착필름.
- 제 1항에 있어서,상기 기재필름의 두께가 50~300㎛인 것을 특징으로 하는 반도체 웨이퍼 표면보호용 점착필름.
- 기재필름을 형성하는 공정;상기 기재필름의 인장강도 및 파단신율을 제어하는 공정;상기 기재필름의 한쪽 표면에 점착층을 형성하는 공정; 및상기 점착층을 형성한 기재필름을 자외선(UV) 경화하는 공정을 포함하는 것을 특징으로 하는 반도체 웨이퍼 표면보호용 점착 필름의 제조방법.
- 제 6항에 있어서,상기 기재필름의 인장강도 및 파단신율을 제어하는 공정은 상기 기재필름의 인장강도를 2~10kg/mm2, 파단신율을 50~200%으로 제어하는 것을 특징으로 하는 반도체 웨이퍼 표면보호용 점착필름의 제조방법.
- 제 6항에 있어서,상기 기재필름의 한쪽 면에 점착층을 형성하는 공정은 롤코터법, 리버스 롤코터법, 그라비아 롤법, 바코트법, 콤마 코터법 및 다이코터법 중 어느 하나를 선택하여 이루어지는 것을 특징으로 하는 웨이퍼 표면보호용 점착필름의 제조방법.
- 제 6항에 있어서,상기 점착필름은 자외선 조사전 박리력은 400~1200g/in, 자외선 조사후 박리력은 20~200g/in인 것을 특징으로 하는 웨이퍼 표면보호용 점착필름의 제조방법.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/350,445 US20140272401A1 (en) | 2011-11-02 | 2012-10-22 | Adhesive film having good machinability for protecting the surface of a semiconductor wafer |
CN201280053079.3A CN103906819B (zh) | 2011-11-02 | 2012-10-22 | 切断性优秀的半导体晶片表面保护用粘结膜 |
JP2014536999A JP5974106B2 (ja) | 2011-11-02 | 2012-10-22 | 切断性に優れた半導体ウエハー表面保護用粘着フィルム |
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KR10-2011-0113294 | 2011-11-02 | ||
KR1020110113294A KR101393895B1 (ko) | 2011-11-02 | 2011-11-02 | 절단성이 우수한 반도체 웨이퍼 표면보호용 점착필름 |
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US (1) | US20140272401A1 (ko) |
JP (1) | JP5974106B2 (ko) |
KR (1) | KR101393895B1 (ko) |
CN (1) | CN103906819B (ko) |
TW (1) | TWI554587B (ko) |
WO (1) | WO2013065981A1 (ko) |
Cited By (1)
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TWI668287B (zh) * | 2014-03-26 | 2019-08-11 | 日商琳得科股份有限公司 | Adhesive sheet |
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KR102040260B1 (ko) * | 2016-03-22 | 2019-11-27 | 주식회사 엘지화학 | 반도체 웨이퍼 표면 보호용 점착 필름 및 이의 제조방법 |
EP3564425B1 (en) * | 2016-12-28 | 2021-10-27 | LG Electronics Inc. | Washing machine |
JP2022041447A (ja) * | 2020-09-01 | 2022-03-11 | 株式会社ディスコ | ウェーハの加工方法 |
KR102660802B1 (ko) * | 2021-08-11 | 2024-04-26 | (주)이녹스첨단소재 | 웨이퍼 처리용 점착 필름 |
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2012
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- 2012-10-22 JP JP2014536999A patent/JP5974106B2/ja active Active
- 2012-10-22 US US14/350,445 patent/US20140272401A1/en not_active Abandoned
- 2012-10-22 CN CN201280053079.3A patent/CN103906819B/zh active Active
- 2012-10-24 TW TW101139371A patent/TWI554587B/zh active
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Also Published As
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US20140272401A1 (en) | 2014-09-18 |
JP5974106B2 (ja) | 2016-08-23 |
CN103906819A (zh) | 2014-07-02 |
KR101393895B1 (ko) | 2014-05-13 |
JP2015501353A (ja) | 2015-01-15 |
CN103906819B (zh) | 2017-05-24 |
TWI554587B (zh) | 2016-10-21 |
KR20130048443A (ko) | 2013-05-10 |
TW201319211A (zh) | 2013-05-16 |
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