WO2017150145A1 - Feuille composite pour formation de membrane protectrice - Google Patents
Feuille composite pour formation de membrane protectrice Download PDFInfo
- Publication number
- WO2017150145A1 WO2017150145A1 PCT/JP2017/004927 JP2017004927W WO2017150145A1 WO 2017150145 A1 WO2017150145 A1 WO 2017150145A1 JP 2017004927 W JP2017004927 W JP 2017004927W WO 2017150145 A1 WO2017150145 A1 WO 2017150145A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- protective film
- forming
- film
- meth
- acrylate
- Prior art date
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- 230000001681 protective effect Effects 0.000 title claims abstract description 641
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Images
Classifications
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/28—Encapsulations, e.g. encapsulating layers, coatings, e.g. for protection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D201/00—Coating compositions based on unspecified macromolecular compounds
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
-
- 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
- C09J201/00—Adhesives based on unspecified macromolecular compounds
-
- 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
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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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B32B2255/26—Polymeric coating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/406—Bright, glossy, shiny surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/748—Releasability
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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
Definitions
- the present invention relates to a composite sheet for forming a protective film for forming a protective film on the back surface of a semiconductor chip.
- semiconductor devices have been manufactured using a mounting method called a so-called face down method.
- a semiconductor chip having electrodes such as bumps on a circuit surface is used, and the electrodes are bonded to a substrate. For this reason, the back surface opposite to the circuit surface of the chip may be exposed.
- a resin film made of an organic material is formed as a protective film on the exposed back surface of the chip and may be taken into the semiconductor device as a semiconductor chip with a protective film.
- the protective film is used to prevent cracks from occurring in the chip after the dicing process or packaging.
- a protective film-forming composite sheet comprising a protective film-forming film on a support sheet.
- the support sheet for example, a resin base material or a laminated structure such as a base material and an adhesive layer is used, and a laminated surface such as a protective film forming film or an adhesive layer of the base material is surface-treated. Sometimes it is done.
- the support sheet in addition to the protective film-forming film having a protective film-forming ability, the support sheet can function as a dicing sheet, and the protective film-forming film and the dicing sheet are integrated. It can be made.
- one or both sides thereof usually have an uneven shape. This is because if the substrate does not have such an uneven shape, the contact surface between the substrates adheres and blocks when the substrate is wound up to form a roll, making it difficult to use. . If at least one of the contact surfaces of the substrates has an uneven shape, the area of the contact surface is reduced, so that blocking is suppressed.
- FIG. 4 is a cross-sectional view schematically showing an example of a conventional composite sheet for forming a protective film. Note that, in the drawings used in the following description, for example, in order to make the characteristics of the protective film-forming composite sheet easier to understand, there are cases where the main part is shown enlarged for convenience. The dimensional ratio and the like are not necessarily the same as actual.
- the conventional protective film-forming composite sheet 9 shown here comprises a protective film-forming film 13 on a support sheet 90, and the support sheet 90 is made of a laminated structure of a base material 91 and an adhesive layer 12.
- the protective film forming film 13 is provided on the pressure-sensitive adhesive layer 12.
- the protective film-forming film 13 becomes a protective film by curing.
- the protective film-forming composite sheet 9 further includes a release film 15 on the protective film-forming film 13, and the release film 15 is removed when the protective film-forming composite sheet 9 is used.
- the surface (back surface) 90 b opposite to the surface (front surface) 90 a provided with the protective film forming film 13 of the support sheet 90, that is, the adhesive layer 12 of the substrate 91 is formed.
- a surface (back surface) 91b opposite to the provided surface (front surface) 91a is an uneven surface.
- the composite sheet 9 for forming the protective film is thus exposed to the back surface 91b of the base material 91 and the release film 15 when the back surface 91b of the base material 91 has a concavo-convex surface and is taken up into a roll. Sticking with the surface (surface) 15a, that is, blocking is suppressed.
- the composite sheet for protective film formation is printed on the surface of the protective film formed from the protective film-forming film on the support sheet side by irradiation with laser light (hereinafter sometimes referred to as “laser printing”).
- Laser printing is applied from the opposite side of the support sheet on which the protective film is formed.
- the protective film is irradiated with laser light from the back surface 91b side of the base material 91 through the support sheet 90. Since it is an uneven surface, there is a problem that light is irregularly reflected here and laser printing becomes unclear.
- FIG. 5 is a cross-sectional view schematically showing another example of a conventional composite sheet for forming a protective film.
- the conventional protective film-forming composite sheet 8 shown here comprises a protective film-forming film 13 on a support sheet 80, like the protective film-forming composite sheet 9, and the support sheet 80 is a base material. 81 and a pressure-sensitive adhesive layer 12, and a protective film-forming film 13 is provided on the pressure-sensitive adhesive layer 12.
- the arrangement of the uneven surface of the base material 81 is opposite to that of the base material 91 in the support sheet 90. That is, in the composite sheet 8 for forming the protective film, the surface (front surface) 81a of the base material 81 provided with the adhesive layer 12 is an uneven surface, and the surface (back surface) opposite to the surface 81a of the base material 81. ) 81b is a smooth surface.
- the base material 81, the protective film forming film 13 and the release film 15 in the support sheet 80 are the same as the base material 91, the protective film forming film 13 and the release film 15 in the support sheet 90, respectively.
- the back surface 81b of the substrate 81 that is, the surface (back surface) 80b opposite to the surface (front surface) 80a provided with the adhesive layer 12 of the support sheet 80.
- the back surface 81b of the substrate 81 and the exposed surface (front surface) 15a of the release film 15 are attached, that is, blocking occurs. It cannot be suppressed.
- blocking occurs, wrinkles occur in the protective film-forming composite sheet 8, or the release film 15 peels off from the protective film-forming film 13 when the protective film-forming composite sheet 8 is unwound from the roll.
- the pressure-sensitive adhesive layer 12 needs to have a sufficient thickness so as to eliminate the uneven shape. If this is insufficient, the surface (back surface) 13b on the support sheet 80 side of the protective film forming film 13 will have an uneven shape reflecting the uneven shape of the base material 81, and such a protective film formation will be performed. There was a problem that the laser printing applied to the surface on the support sheet side of the protective film formed from the protective film 13 became unclear.
- the present invention has been made in view of the above circumstances, and is a protective film-forming composite sheet used for forming a protective film on the back surface of a semiconductor chip, which can suppress blocking and has a clear laser on the protective film. It is an object to provide a composite sheet for forming a protective film that can be printed.
- a protective film-forming film is provided on one surface of the support sheet, and the surface of the support sheet is opposite to the side provided with the protective film-forming film.
- a composite sheet for forming a protective film comprising a coating layer thereon, and having a gloss value of 32 to 95 on the surface of the coating layer opposite to the side in contact with the support sheet.
- the release film measured by the following method using the protective film-forming composite sheet provided with a release film on the protective film-forming film.
- the peel force may be 10 mN / 50 mm or less.
- the film was allowed to stand at 40 ° C.
- the support sheet is formed by laminating a base material and an adhesive layer, and the protective film-forming composite sheet is the coating layer.
- the base material, the pressure-sensitive adhesive layer, and the protective film-forming film may be laminated in this order.
- the pressure-sensitive adhesive layer may be energy ray curable or non-energy ray curable.
- the protective film-forming film may be thermosetting or energy ray curable.
- a protective film-forming composite sheet used for forming a protective film on the back surface of a semiconductor chip, which can suppress blocking and can be clearly laser-printed on the protective film.
- the composite sheet for protective film formation includes a protective film-forming film on one surface of the support sheet, and includes the protective film-forming film of the support sheet.
- a coating layer is provided on the surface opposite to the side, and the gloss value of the surface of the coating layer opposite to the side in contact with the support sheet is 32 to 95.
- the composite sheet for protective film formation has a gloss value on the surface opposite to the side in contact with the support sheet of the coating layer within the specific range as described above.
- the protective film-forming film is cured by heating or irradiation with energy rays to form a protective film, but the laminated structure of the support sheet and the protective film is also used. As long as it is maintained, it is referred to as a protective sheet-forming composite sheet.
- a protective sheet-forming composite sheet when the support sheet is a laminated structure of a base material and an adhesive layer, a cured product of the base material and the adhesive layer, As long as the protective film-forming film or the laminated structure of the protective film is maintained, the protective film-forming composite sheet is referred to.
- FIG. 1 is a cross-sectional view schematically showing one embodiment of a composite sheet for forming a protective film according to one embodiment of the present invention.
- the protective film-forming composite sheet 1 shown here includes a protective film-forming film 13 on one surface 10 a of the support sheet 10, and a coating layer 14 on the other surface (back surface) 10 b of the support sheet 10.
- the support sheet 10 is formed by laminating a base material 11 and a pressure-sensitive adhesive layer 12, and includes a pressure-sensitive adhesive layer 12 on one surface 11 a of the base material 11, and the other surface (back surface) of the base material 11.
- a coating layer 14 is provided on 11b, and a protective film forming film 13 is provided on the pressure-sensitive adhesive layer 12.
- the protective film-forming composite sheet 1 further includes a release film 15 on the protective film-forming film 13, and the release film 15 is removed when the protective film-forming composite sheet 1 is used.
- the protective film-forming film 13 becomes a protective film by curing.
- the pressure-sensitive adhesive layer 12 is laminated on the surface 11 a of the substrate 11, and the protective film-forming film 13 is laminated on a part of the surface 12 a of the pressure-sensitive adhesive layer 12.
- the peeling film 15 is laminated
- a gap may exist between the release film 15 and the surface 12 a of the pressure-sensitive adhesive layer 12 or the surface 13 a of the protective film forming film 13.
- the voids are likely to occur in the vicinity of the protective film-forming film 13.
- the gloss value of the surface (back surface) 14b opposite to the surface (front surface) 14a in contact with the support sheet 10 (base material 11) of the coating layer 14 is 32 to 95. It has become. Thereby, clear laser printing can be performed on the protective film.
- the “gross value of the surface of the coating layer” means a 20 ° specular gloss of the surface of the coating layer from the side opposite to the support sheet side of the coating layer according to JIS K 7105 unless otherwise specified. The value obtained by measuring the degree.
- the protective film-forming composite sheet 1 includes the coating layer 14, so that the back surface 11 b of the base material 11 and the exposed surface (front surface) of the release film 15, even when wound up to form a roll. Sticking with 15a, that is, blocking is suppressed.
- the surface (back surface) 11b opposite to the provided surface (front surface) 11a is an uneven surface with low smoothness here, but may be a smooth surface.
- the coating layer 14 covers this surface, so that the support of the coating layer 14 is supported.
- the surface (rear surface) 14b opposite to the surface (front surface) 14a in contact with the sheet 10 (base material 11) has a high smoothness and a small surface roughness Ra, so that the laser light in the coating layer 14 is obtained. Is suppressed, and laser printing can be clearly performed on the protective film.
- surface roughness Ra means a so-called arithmetic average roughness defined by JIS B0601: 2001 unless otherwise specified.
- the surface 11a of the substrate 11 is a smooth surface here, but may be an uneven surface with low smoothness. However, as will be described later, it is easier to suppress the generation of voids between the surface 11a of the base material 11 and the pressure-sensitive adhesive layer, and to make the composite sheet 1 for forming a protective film have favorable characteristics. Therefore, the surface 11a of the substrate 11 is preferably a smooth surface.
- the composite sheet 1 for forming a protective film shown in FIG. 1 has a back surface of a semiconductor wafer (not shown) attached to the front surface 13a of the protective film forming film 13 with the release film 15 removed.
- the exposed surface on which the protective film forming film 13 is not laminated is attached to a jig such as a ring frame and used.
- FIG. 2 is a cross-sectional view schematically showing another embodiment of the composite sheet for forming a protective film according to one embodiment of the present invention.
- the protective film forming composite sheet 2 shown here has a protective film forming film 23 laminated on the entire surface 12 a of the pressure-sensitive adhesive layer 12, and a jig adhesive on a part of the surface 23 a of the protective film forming film 23.
- Layer 16 is laminated, of the surface 23a of the protective film forming film 23, the exposed surface on which the jig adhesive layer 16 is not laminated, and the surface 16a (upper surface and side surface) of the jig adhesive layer 16 It is the same as the composite sheet 1 for forming a protective film shown in FIG. 1 except that a release film 15 is laminated thereon.
- a gap may exist between the release film 15 and the surface 23a of the protective film-forming film 23 or the surface 16a of the jig adhesive layer 16.
- the gap portion is likely to occur in the vicinity of the jig adhesive layer 16.
- the gloss value of the surface (back surface) 14b is 32 to 95. Therefore, clear laser printing can be performed on the protective film formed from the protective film-forming film 23.
- the protective film-forming composite sheet 2 is provided with the coating layer 14, so that blocking is suppressed even when the protective film-forming composite sheet 2 is wound up into a roll.
- the protective film-forming composite sheet 2 shown in FIG. 2 has a semiconductor wafer (not shown) attached to the front surface 23a of the protective film-forming film 23 with the release film 15 removed.
- the upper surface of the surface 16a of the adhesive layer 16 is used by being attached to a jig such as a ring frame.
- the composite sheet for forming a protective film according to the present invention is not limited to the one shown in FIGS. 1 and 2, and a part of the structure shown in FIGS. 1 and 2 is changed or deleted within a range not impairing the effects of the present invention.
- other configurations may be added to those described above.
- each structure of the composite sheet for protective film formation which concerns on one embodiment of this invention is demonstrated in detail.
- the support sheet is not particularly limited as long as it can be provided with the protective film-forming film. For example, peeling to prevent dust and the like from adhering to the surface of the protective film-forming film.
- Examples of the sheet may include a dicing sheet for protecting the surface of the protective film-forming film in a dicing process.
- Preferable examples of the support sheet include those composed only of a base material usually used in the field of semiconductor wafer processing sheets, and those obtained by laminating a base material and an adhesive layer.
- the support sheet may be composed of one layer (single layer) or may be composed of two or more layers.
- the plurality of layers may be the same as or different from each other. That is, all the layers may be the same, all the layers may be different, or only some of the layers may be the same. And when several layers differ from each other, the combination of these several layers is not specifically limited.
- the plurality of layers being different from each other means that at least one of the material and the thickness of each layer is different from each other.
- the thickness of the support sheet may be appropriately selected depending on the purpose, but is preferably 10 from the viewpoint that sufficient flexibility can be imparted to the protective film-forming composite sheet and the adhesiveness to the semiconductor wafer becomes good. It is ⁇ 500 ⁇ m, more preferably 20 to 350 ⁇ m, particularly preferably 30 to 200 ⁇ m.
- the thickness of the support sheet means the total thickness of each layer constituting the support sheet. For example, in the case of a support sheet in which a base material and an adhesive layer are laminated, the base material And the total thickness of the pressure-sensitive adhesive layer. Note that, at least one surface of the support sheet can be an uneven surface, but the thickness of the support sheet is calculated with the tip of the convex portion as one starting point at a portion including the convex portion on the uneven surface of the support sheet. That's fine.
- the material of the base material is preferably various resins, and specific examples thereof include polyethylene (low density polyethylene (LDPE), linear low density polyethylene (LLDPE), high density polyethylene (HDPE, etc.). )), Polypropylene, ethylene / propylene copolymer, polybutene, polybutadiene, polymethylpentene, polyvinyl chloride, vinyl chloride copolymer, polyethylene terephthalate, polyethylene naphthalate, polybutylene terephthalate, polyurethane, polyurethane acrylate, polyimide, ethylene Vinyl acetate copolymer, ionomer resin, ethylene / (meth) acrylic acid copolymer, ethylene / (meth) acrylic acid ester copolymer, polystyrene, polycarbonate, fluororesin, hydrogenation of any of these resins Additives, modified products, cross-linked products or copolymers may be mentioned. In this specification, “(meth) acrylic acid acrylic acid copo
- the thickness of the base material can be appropriately selected according to the purpose, but is 15 to 300 ⁇ m. And more preferably 20 to 200 ⁇ m.
- the thickness of the substrate is within such a range, the flexibility of the composite sheet for forming a protective film and the adhesiveness to a semiconductor wafer or semiconductor chip are further improved.
- the substrate may be composed of one layer (single layer) or may be composed of two or more layers. When a base material consists of multiple layers, these multiple layers may be the same as or different from each other.
- the plurality of layers may be the same as or different from each other” means the same as in the case of the above-described support sheet.
- the total thickness of each layer may be set to the preferable thickness of the substrate.
- the surface roughness Ra of the surface (surface) provided with the pressure-sensitive adhesive layer of the substrate is preferably 0.001 to 0.1 ⁇ m, more preferably 0.005 to 0.08 ⁇ m, and A thickness of 01 to 0.04 ⁇ m is particularly preferable.
- the surface roughness Ra of the substrate surface is not more than the upper limit value, laser printing can be performed more clearly on the protective film.
- the surface roughness Ra of the substrate surface can be adjusted by, for example, molding conditions of the substrate, surface treatment conditions, and the like.
- a method of dividing the semiconductor wafer into semiconductor chips by dicing for example, blade dicing for cutting the semiconductor wafer using a blade, laser dicing for cutting the semiconductor wafer by laser irradiation, or spraying water containing an abrasive And a method using water dicing or the like for cutting a semiconductor wafer.
- the laser beam in the infrared region is irradiated so as to be focused on the focal point set inside the semiconductor wafer.
- the protective sheet-forming composite sheet provided with such a substrate has a modified layer in the semiconductor wafer described above. It is suitable for use when forming a semiconductor wafer into individual pieces.
- the surface roughness Ra of the surface (back surface) opposite to the surface (front surface) provided with the adhesive layer of the substrate in other words, the surface (surface) provided with the protective film forming film of the support sheet.
- the surface roughness Ra of the opposite surface (back surface) is preferably 0.001 to 4 ⁇ m, more preferably 0.005 to 3.7 ⁇ m, and 0.01 to 3.4 ⁇ m. More preferably, the thickness is 0.02 to 3.1 ⁇ m.
- the surface roughness Ra on the back surface of the substrate is less than or equal to the upper limit, the surface roughness Ra on the surface of the coating layer opposite to the side in contact with the support sheet can be more easily reduced, and the protective film In contrast, it becomes easier to perform laser printing clearly.
- the surface roughness Ra of the back surface of the base material can be adjusted by, for example, molding conditions of the base material, surface treatment conditions, and the like.
- the resin that is the material of the base material may be cross-linked.
- the resin that is the material of the base material may be a sheet formed by extrusion molding of a thermoplastic resin, or may be a stretched sheet, and a thin layer formed by a known means of a curable resin. It may be formed into a sheet by forming and curing. Further, the base material may be colored or printed.
- the base material is preferably one containing polypropylene from the viewpoint that it has excellent heat resistance and has an appropriate flexibility so that it has expandability and pick-up suitability.
- the base material containing polypropylene may be, for example, a single layer or a plurality of layers made of only polypropylene, or a multiple layer base material in which a polypropylene layer and a resin layer other than polypropylene are laminated. May be.
- the protective film-forming film is thermosetting, the base material has heat resistance, so that deterioration of the base material due to heat can be suppressed, and occurrence of defects in the manufacturing process of the semiconductor device can be effectively suppressed. .
- the substrate is subjected to a roughening treatment such as a sandblast treatment, a solvent treatment, a corona discharge treatment, an electron beam irradiation treatment, a plasma.
- the surface may be subjected to oxidation treatment such as treatment, ozone / ultraviolet irradiation treatment, flame treatment, chromic acid treatment, and hot air treatment.
- the base material may be one whose surface is primed.
- the said adhesive layer can use a well-known thing suitably.
- An adhesive layer can be formed using the adhesive composition containing various components, such as an adhesive, for comprising this.
- the ratio of the content of components that do not vaporize at room temperature in the pressure-sensitive adhesive composition is usually the same as the ratio of the content of the components of the pressure-sensitive adhesive layer.
- “normal temperature” means a temperature that is not particularly cooled or heated, that is, a normal temperature, and examples thereof include a temperature of 15 to 25 ° C.
- the thickness of the pressure-sensitive adhesive layer can be appropriately selected depending on the purpose, but is preferably 1 to 100 ⁇ m, more preferably 2 to 80 ⁇ m, and particularly preferably 3 to 50 ⁇ m.
- the pressure-sensitive adhesive layer may be composed of one layer (single layer) or may be composed of two or more layers. When an adhesive layer consists of multiple layers, these multiple layers may be the same or different from each other.
- the plurality of layers may be the same as or different from each other” means the same as in the case of the above-described support sheet.
- the total thickness of each layer may be set to the thickness of the preferable pressure-sensitive adhesive layer.
- pressure-sensitive adhesive examples include pressure-sensitive adhesive resins such as acrylic resins, urethane resins, rubber resins, silicone resins, and vinyl ether resins. Examples thereof include a linear curable resin.
- energy beam means an electromagnetic wave or charged particle beam having energy quanta, and examples thereof include ultraviolet rays and electron beams. Ultraviolet rays can be irradiated by using, for example, a high-pressure mercury lamp, a fusion H lamp, or a xenon lamp as an ultraviolet ray source. The electron beam can be emitted by an electron beam accelerator or the like.
- the energy ray curable resin examples include those having a polymerizable group such as a (meth) acryloyl group and a vinyl group.
- the adhesive resin is preferably an acrylic resin, and more preferably a (meth) acrylic acid ester copolymer including a structural unit derived from a (meth) acrylic acid ester.
- the pressure-sensitive adhesive layer contains a component that is polymerized by irradiation with energy rays, such as an energy ray-curable resin
- the pressure-sensitive adhesive layer becomes energy-ray curable and decreases its adhesiveness by irradiation with energy rays. By doing so, it becomes easy to pick up a semiconductor chip with a protective film, which will be described later.
- a pressure-sensitive adhesive layer can be formed using, for example, various pressure-sensitive adhesive compositions containing a component that is polymerized by irradiation with energy rays.
- Adhesive composition examples include those containing a component that polymerizes upon irradiation with energy rays.
- Examples of such a pressure-sensitive adhesive composition include an acrylic resin and an energy ray-polymerizable compound. What is contained (hereinafter may be abbreviated as “adhesive composition (i)”), the acrylic resin having a hydroxyl group and having a polymerizable group in the side chain (for example, having a hydroxyl group, And those having a polymerizable group in the side chain via a urethane bond) and an isocyanate-based crosslinking agent (hereinafter sometimes abbreviated as “adhesive composition (ii)”). Can be mentioned.
- the pressure-sensitive adhesive composition (i) contains the acrylic resin and an energy beam polymerizable compound as essential components.
- each component will be described.
- acrylic resin Preferred examples of the acrylic resin in the pressure-sensitive adhesive composition (i) include, for example, polymerization of (meth) acrylic acid ester as a monomer and a monomer other than (meth) acrylic acid ester used as necessary.
- the (meth) acrylic acid ester copolymer obtained by this is mentioned.
- Examples of the (meth) acrylic acid ester include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, pentyl (meth) acrylate, (meth) Hexyl acrylate, heptyl (meth) acrylate, n-octyl (meth) acrylate, isooctyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, n-nonyl (meth) acrylate, (meth) acrylic acid Isononyl, decyl (meth) acrylate, undecyl (meth) acrylate, dodecyl (meth) acrylate (lauryl (meth) acrylate), tridecyl (meth) acrylate, tetradecyl (meth) acrylate ((meth) acrylic acid) Myr
- (meth) acrylic acid alkyl ester in which the alkyl group constituting the alkyl ester has a chain structure having 1 to 18 carbon atoms;
- (Meth) acrylic acid cycloalkyl esters such as (meth) acrylic acid isobornyl, (meth) acrylic acid dicyclopentanyl;
- (Meth) acrylic acid aralkyl esters such as (meth) acrylic acid benzyl;
- (Meth) acrylic acid cycloalkenyl esters such as (meth) acrylic acid dicyclopentenyl ester;
- (Meth) acrylic acid cycloalkenyloxyalkyl esters such as (meth) acrylic acid dicyclopentenyloxyethyl ester;
- (Meth) acrylic imide Glycidyl group-containing (meth) acrylic acid ester such as (meth) acrylic acid glycidyl; Hydroxymethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-
- Examples of the monomer other than the (meth) acrylic acid ester include (meth) acrylic acid, itaconic acid, vinyl acetate, acrylonitrile, styrene, N-methylolacrylamide and the like.
- monomers such as said (meth) acrylic acid ester and monomers other than said (meth) acrylic acid ester which comprise acrylic resin, all may be only 1 type, and 2 or more types may be sufficient as them.
- the acrylic resin contained in the pressure-sensitive adhesive composition (i) may be one kind or two or more kinds.
- the content of the acrylic resin in the pressure-sensitive adhesive composition (i) is preferably 40 to 99% by mass with respect to the total amount of all the components other than the solvent in the pressure-sensitive adhesive composition (i), More preferably, it is 91% by weight.
- the energy ray polymerizable compound is a compound that is polymerized and cured by irradiation with energy rays, and examples thereof include those having an energy ray polymerizable group such as an energy ray curable double bond in the molecule. .
- Examples of the energy ray polymerizable compound include low molecular weight compounds (monofunctional or polyfunctional monomers and oligomers) having an energy ray polymerizable group, and more specifically, trimethylolpropane triacrylate, tetramethylol.
- Acrylates such as methanetetraacrylate, pentaerythritol triacrylate, dipentaerythritol monohydroxypentaacrylate, dipentaerythritol hexaacrylate, 1,4-butylene glycol diacrylate, 1,6-hexanediol diacrylate; Cyclic aliphatic skeleton-containing acrylates such as dicyclopentadiene dimethoxydiacrylate; Examples include acrylate compounds such as polyethylene glycol diacrylate, oligoester acrylate, urethane acrylate oligomer, epoxy-modified acrylate, polyether acrylate, and itaconic acid oligomer.
- the molecular weight of the energy beam polymerizable compound is preferably 100 to 30,000, and more preferably 300 to 10,000.
- the energy ray polymerizable compound contained in the pressure-sensitive adhesive composition (i) may be only one type, or two or more types.
- the content of the energy ray polymerizable compound in the pressure-sensitive adhesive composition (i) is preferably 1 to 125 parts by mass with respect to 100 parts by mass of the acrylic resin, and 10 to 125 parts by mass. It is more preferable.
- the pressure-sensitive adhesive composition (i) may contain a photopolymerization initiator in addition to the acrylic resin and the energy beam polymerizable compound.
- the photopolymerization initiator may be a known one, and specifically, for example, 4- (2-hydroxyethoxy) phenyl (2-hydroxy-2-propyl) ketone, ⁇ -hydroxy- ⁇ , ⁇ ′-dimethyl Acetophenone, 2-methyl-2-hydroxypropiophenone, 1-hydroxycyclohexyl phenyl ketone, 2-hydroxy-1- ⁇ 4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] phenyl ⁇ -2 ⁇ -ketol compounds such as methyl-propan-1-one; Acetophenone compounds such as methoxyacetophenone, 2,2-dimethoxy-2-phenylacetophenone, 2,2-diethoxyacetophenone, 2-methyl-1- [4- (methylthio) phenyl] -2-morpholinoprop
- the photopolymerization initiator contained in the pressure-sensitive adhesive composition (i) may be one kind or two or more kinds.
- the content of the photopolymerization initiator in the pressure-sensitive adhesive composition (i) is 0.1 to 10 parts by mass with respect to 100 parts by mass of the energy beam polymerizable compound. It is preferably 1 to 5 parts by mass.
- the effect by using a photoinitiator is fully acquired because the said content of a photoinitiator is more than the said lower limit.
- production of the by-product from an excess photoinitiator is suppressed because the said content of a photoinitiator is below the said upper limit, and hardening of an adhesive layer advances more favorably.
- the pressure-sensitive adhesive composition (i) may contain a crosslinking agent in addition to the acrylic resin and the energy beam polymerizable compound.
- a crosslinking agent examples include organic polyvalent isocyanate compounds and organic polyvalent imine compounds.
- organic polyvalent isocyanate compound examples include aromatic polyvalent isocyanate compounds, aliphatic polyvalent isocyanate compounds, alicyclic polyvalent isocyanate compounds, trimers of these compounds, isocyanurates, adducts, and the aromatic And a terminal isocyanate urethane prepolymer obtained by reacting an aliphatic polyvalent isocyanate compound, an aliphatic polyvalent isocyanate compound, or an alicyclic polyvalent isocyanate compound and a polyol compound.
- the adduct is composed of the aromatic polyvalent isocyanate compound, the aliphatic polyvalent isocyanate compound or the alicyclic polyvalent isocyanate compound, and low molecular activity such as ethylene glycol, propylene glycol, neopentyl glycol, trimethylolpropane or castor oil.
- a reactant with a hydrogen-containing compound is meant.
- organic polyvalent isocyanate compound for example, 2,4-tolylene diisocyanate; 2,6-tolylene diisocyanate; 1,3-xylylene diisocyanate; 1,4-xylene diisocyanate; diphenylmethane-4 Dimethylmethane-2,4'-diisocyanate; 3-methyldiphenylmethane diisocyanate; hexamethylene diisocyanate; isophorone diisocyanate; dicyclohexylmethane-4,4'-diisocyanate; dicyclohexylmethane-2,4'-diisocyanate; trimethylol
- a polyol such as propane. ; Lysine diisocyanate.
- organic polyvalent imine compound examples include N, N′-diphenylmethane-4,4′-bis (1-aziridinecarboxamide), trimethylolpropane-tri- ⁇ -aziridinylpropionate, and tetramethylolmethane.
- -Tri- ⁇ -aziridinylpropionate, N, N′-toluene-2,4-bis (1-aziridinecarboxamide) triethylenemelamine and the like.
- an isocyanate compound is used as the crosslinking agent
- the crosslinking agent has an isocyanate group and the acrylic resin has a hydroxyl group, a crosslinked structure can be easily introduced into the pressure-sensitive adhesive layer by a reaction between the isocyanate group and the hydroxyl group.
- the cross-linking agent contained in the pressure-sensitive adhesive composition (i) may be one type or two or more types.
- the content of the crosslinking agent in the pressure-sensitive adhesive composition (i) is preferably 0.01 to 20 parts by mass with respect to 100 parts by mass of the acrylic resin. It is more preferably 1 to 16 parts by mass.
- the pressure-sensitive adhesive composition (i) preferably further contains a solvent in addition to the acrylic resin and the energy beam polymerizable compound.
- the solvent is not particularly limited. Preferred examples include hydrocarbons such as toluene and xylene; alcohols such as methanol, ethanol, 2-propanol, isobutyl alcohol (2-methylpropan-1-ol), and 1-butanol. Esters such as ethyl acetate; ketones such as acetone and methyl ethyl ketone; ethers such as tetrahydrofuran; amides (compounds having an amide bond) such as dimethylformamide and N-methylpyrrolidone. As for the solvent which adhesive composition (i) contains, only 1 type may be sufficient and 2 or more types may be sufficient.
- the content of the solvent is preferably 40 to 90% by mass, and more preferably 50 to 80% by mass.
- the pressure-sensitive adhesive composition (i) contains, in addition to the acrylic resin and the energy beam polymerizable compound, other components not corresponding to the photopolymerization initiator, the crosslinking agent, and the solvent within a range not impairing the effects of the present invention. You may contain.
- the other components may be known ones and can be arbitrarily selected according to the purpose, and are not particularly limited. Preferred examples include dyes, pigments, deterioration inhibitors, antistatic agents, flame retardants, and silicone compounds. And various additives such as a chain transfer agent.
- the said other component which an adhesive composition (i) contains may be only 1 type, and 2 or more types may be sufficient as it.
- the pressure-sensitive adhesive composition (ii) is an acrylic resin having a hydroxyl group and having a polymerizable group in the side chain (for example, having a hydroxyl group and having a polymerizable group in the side chain via a urethane bond). And an isocyanate-based crosslinking agent as essential components.
- the acrylic resin has a polymerizable group in the side chain, so that the energy ray polymerizable compound is used as in the case of the pressure-sensitive adhesive composition (i).
- the peelability from the adherend is improved due to the reduced adhesiveness of the pressure-sensitive adhesive layer after the polymerization reaction (curing), and the pick-up property of the semiconductor chip with a protective film is improved.
- the description of “acrylic resin” in the pressure-sensitive adhesive composition (ii) means “acrylic resin having a polymerizable group in a side chain” unless otherwise specified. To do.
- acrylic resin having a polymerizable group in the side chain
- examples of the acrylic resin having a polymerizable group in the side chain include hydroxyl groups such as a hydroxyl group-free (meth) acrylate ester having no hydroxyl group and a hydroxyl group-containing (meth) acrylate ester having a hydroxyl group.
- Examples of the hydroxyl group-free (meth) acrylic acid ester include those other than the hydroxyl group-containing (meth) acrylic acid ester among the (meth) acrylic acid esters in the pressure-sensitive adhesive composition (i). Moreover, as said hydroxyl-containing compound, the same thing as the hydroxyl-containing (meth) acrylic acid ester in adhesive composition (i) is mentioned.
- Each of the hydroxyl group-free (meth) acrylic acid ester and the hydroxyl group-containing compound constituting the acrylic resin may be one type or two or more types.
- Examples of the compound having an isocyanate group and a polymerizable group include isocyanate group-containing (meth) acrylic acid esters such as 2-methacryloyloxyethyl isocyanate.
- the compound which has the said isocyanate group and polymeric group which comprises the said acrylic resin may be only 1 type, and 2 or more types may be sufficient as it.
- the acrylic resin contained in the pressure-sensitive adhesive composition (ii) may be one kind or two or more kinds.
- the content of the acrylic resin in the pressure-sensitive adhesive composition (ii) is preferably 80 to 99% by mass, based on the total amount of all the components other than the solvent in the pressure-sensitive adhesive composition (ii), More preferably, it is 97 mass%.
- isocyanate-based crosslinking agent As said isocyanate type crosslinking agent, the same thing as the said organic polyvalent isocyanate compound which is a crosslinking agent in adhesive composition (i) is mentioned, for example.
- the isocyanate-based crosslinking agent contained in the pressure-sensitive adhesive composition (ii) may be only one type, or two or more types.
- the number of moles of isocyanate groups possessed by the isocyanate-based crosslinking agent in the pressure-sensitive adhesive composition (ii) is 0.2 to 3 times the number of moles of hydroxyl groups possessed by the acrylic resin in the pressure-sensitive adhesive composition (ii). Preferably there is.
- the number of moles of the isocyanate group is equal to or more than the lower limit, the peelability from the adherend due to the decrease in the tackiness of the pressure-sensitive adhesive layer after curing is improved, and the pick-up property of the semiconductor chip with a protective film is improved.
- production of the by-product by reaction of isocyanate type crosslinking agents can be suppressed more because the said mole number of an isocyanate group is below the said upper limit.
- the content of the isocyanate-based crosslinking agent in the pressure-sensitive adhesive composition (ii) may be adjusted as appropriate so that the number of moles of the isocyanate group falls within the above-mentioned range.
- the content is preferably 0.01 to 20 parts by mass, more preferably 0.1 to 15 parts by mass, and 0.3 to 12 parts by mass with respect to 100 parts by mass of the resin content. Particularly preferred.
- the pressure-sensitive adhesive composition (ii) may contain a photopolymerization initiator in addition to the acrylic resin and the isocyanate-based crosslinking agent.
- a photopolymerization initiator the same thing as the case of adhesive composition (i) is mentioned, for example.
- the photopolymerization initiator contained in the pressure-sensitive adhesive composition (ii) may be only one type or two or more types.
- the content of the photopolymerization initiator in the pressure-sensitive adhesive composition (ii) is preferably 0.05 to 20 parts by mass with respect to 100 parts by mass of the acrylic resin. .
- the effect by using a photoinitiator is fully acquired because the said content of a photoinitiator is more than the said lower limit.
- production of the by-product from an excess photoinitiator is suppressed because the said content of a photoinitiator is below the said upper limit, and hardening of an adhesive layer advances more favorably.
- the pressure-sensitive adhesive composition (ii) preferably further contains a solvent in addition to the acrylic resin and the isocyanate-based crosslinking agent.
- a solvent in addition to the acrylic resin and the isocyanate-based crosslinking agent.
- 1 type may be sufficient and 2 or more types may be sufficient as it.
- the content of the solvent is preferably 40 to 90% by mass, more preferably 50 to 80% by mass.
- the pressure-sensitive adhesive composition (ii) contains, in addition to the acrylic resin and the isocyanate-based crosslinking agent, other components that do not correspond to the photopolymerization initiator and the solvent, as long as the effects of the present invention are not impaired. Also good.
- the same thing as the case of adhesive composition (i) is mentioned, for example.
- the said other component which an adhesive composition (ii) contains may be only 1 type, and 2 or more types may be sufficient as it.
- the pressure-sensitive adhesive composition containing a component that is polymerized by irradiation with energy rays has been described.
- a pressure-sensitive adhesive composition that does not contain a component that is polymerized by irradiation with energy rays is used.
- the pressure-sensitive adhesive layer may be non-energy ray curable without energy ray curable.
- Preferred examples of such a non-energy ray-curable pressure-sensitive adhesive composition include an acrylic resin and a crosslinking agent (hereinafter, sometimes abbreviated as “pressure-sensitive adhesive composition (iii)”). And may contain optional components such as a solvent and other components not corresponding to the solvent.
- ⁇ Adhesive composition (iii)> The acrylic resin, crosslinking agent, solvent and other components contained in the pressure-sensitive adhesive composition (iii) are all the same as those in the pressure-sensitive adhesive composition (i).
- the content of the acrylic resin in the pressure-sensitive adhesive composition (iii) is preferably 40 to 99% by mass with respect to the total amount of all the components other than the solvent in the pressure-sensitive adhesive composition (iii), and is preferably 50 to It is more preferable that it is 93 mass%.
- the content of the crosslinking agent in the pressure-sensitive adhesive composition (iii) is preferably 3 to 30 parts by mass and more preferably 5 to 25 parts by mass with respect to 100 parts by mass of the acrylic resin. .
- the pressure-sensitive adhesive composition (iii) is the same as the pressure-sensitive adhesive composition (i) except for the points described above.
- the pressure-sensitive adhesive compositions such as pressure-sensitive adhesive compositions (i) to (iii) include the components for constituting each pressure-sensitive adhesive composition, such as the pressure-sensitive adhesive and components other than the pressure-sensitive adhesive as necessary. It is obtained by blending.
- the order of addition at the time of blending each component is not particularly limited, and two or more components may be added simultaneously.
- the method of mixing each component at the time of compounding is not particularly limited, from a known method such as a method of mixing by rotating a stirrer or a stirring blade; a method of mixing using a mixer; a method of mixing by applying ultrasonic waves What is necessary is just to select suitably.
- the temperature and time during the addition and mixing of each component are not particularly limited as long as each compounding component does not deteriorate, and may be adjusted as appropriate, but the temperature is preferably 15 to 30 ° C.
- the protective film-forming film may be either thermosetting or energy ray-curable.
- the film for forming a protective film is cured and finally becomes a protective film having high impact resistance.
- This protective film prevents the occurrence of cracks in the semiconductor chip after the dicing process, for example.
- the protective film-forming film may be referred to as a thermosetting protective film-forming composition or an energy ray-curable protective film-forming composition (hereinafter referred to as a “protective film-forming composition”). ).
- the protective film-forming film may be only one layer (single layer), or may be two or more layers. In the case of a plurality of layers, these layers may be the same or different from each other. The combination is not particularly limited.
- the thickness of the protective film-forming film is not particularly limited, but is preferably 1 to 100 ⁇ m, more preferably 5 to 75 ⁇ m, and particularly preferably 5 to 50 ⁇ m.
- the thickness of the protective film-forming film is equal to or more than the lower limit value, the adhesive force to the adherend semiconductor wafer and semiconductor chip is further increased.
- the protective film which is a cured product, can be more easily cut using a shearing force when the semiconductor chip is picked up.
- thermosetting protective film examples include those containing a polymer component (A) and a thermosetting component (B).
- the polymer component (A) is a component that can be regarded as formed by polymerization reaction of the polymerizable compound.
- the thermosetting component (B) is a component that can undergo a curing (polymerization) reaction using heat as a reaction trigger.
- the polymerization reaction includes a polycondensation reaction.
- the composition for forming a thermosetting protective film can be formed using a composition for forming a thermosetting protective film containing the constituent materials.
- the composition for forming a thermosetting protective film is applied to the surface to be formed of the film for forming a thermosetting protective film, and dried as necessary to form a thermosetting protective film on the target site.
- a film can be formed.
- the ratio of the content of components that do not vaporize at room temperature in the thermosetting protective film-forming composition is usually the same as the content ratio of the components of the thermosetting protective film-forming film.
- “normal temperature” is as described above.
- thermosetting protective film forming composition may be performed by a known method, for example, air knife coater, blade coater, bar coater, gravure coater, roll coater, roll knife coater, curtain coater, die coater, Examples include a method using various coaters such as a knife coater, a screen coater, a Meyer bar coater, and a kiss coater.
- the drying conditions of the composition for forming a thermosetting protective film are not particularly limited, but when the composition for forming a thermosetting protective film contains a solvent to be described later, it is preferably dried by heating. For example, drying is preferably performed at 70 to 130 ° C. for 10 seconds to 5 minutes.
- composition for forming protective film (III-1) for example, a composition (III-1) for forming a thermosetting protective film containing a polymer component (A) and a thermosetting component (B) (in this specification) May be abbreviated as “composition for forming protective film (III-1)”).
- the polymer component (A) is a polymer compound for imparting film-forming properties, flexibility and the like to the thermosetting protective film-forming film.
- the polymer component (A) contained in the protective film-forming composition (III-1) and the thermosetting protective film-forming film may be only one type, two or more types, or two or more types. These combinations and ratios can be arbitrarily selected.
- Examples of the polymer component (A) include an acrylic resin (a resin having a (meth) acryloyl group), a polyester, a urethane resin (a resin having a urethane bond), an acrylic urethane resin, and a silicone resin (having a siloxane bond). Resin), rubber resin (resin having a rubber structure), phenoxy resin, thermosetting polyimide and the like, and acrylic resin is preferable.
- the weight average molecular weight (Mw) of the acrylic resin is preferably 10,000 to 2,000,000, and more preferably 100,000 to 1500,000.
- Mw weight average molecular weight
- the shape stability (time stability during storage) of the thermosetting protective film-forming film is improved.
- the thermosetting protective film forming film easily follows the uneven surface of the adherend, and the adherend and the thermosetting protective film are formed. Occurrence of voids and the like with the film is further suppressed.
- the glass transition temperature (Tg) of the acrylic resin is preferably ⁇ 60 to 70 ° C., and more preferably ⁇ 30 to 50 ° C.
- Tg of the acrylic resin is equal to or higher than the lower limit, the adhesive force between the protective film and the support sheet is suppressed, and the peelability of the support sheet is improved.
- the adhesive force with the to-be-adhered body of the thermosetting protective film formation film and a protective film improves because Tg of acrylic resin is below the said upper limit.
- the acrylic resin is selected from, for example, a polymer of one or more (meth) acrylic acid esters; (meth) acrylic acid, itaconic acid, vinyl acetate, acrylonitrile, styrene, N-methylolacrylamide, and the like. Examples include copolymers of two or more monomers.
- Examples of the (meth) acrylic acid ester constituting the acrylic resin include methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, (meth ) N-butyl acrylate, isobutyl (meth) acrylate, sec-butyl (meth) acrylate, tert-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, (meth) acrylic Heptyl acid, 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, n-octyl (meth) acrylate, n-nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate , Undecyl (me
- the acrylic resin is, for example, one or more monomers selected from (meth) acrylic acid, itaconic acid, vinyl acetate, acrylonitrile, styrene, N-methylolacrylamide and the like in addition to the (meth) acrylic ester. May be obtained by copolymerization.
- Only one type of monomer constituting the acrylic resin may be used, or two or more types may be used, and in the case of two or more types, the combination and ratio thereof can be arbitrarily selected.
- the acrylic resin may have a functional group that can be bonded to other compounds such as a vinyl group, a (meth) acryloyl group, an amino group, a hydroxyl group, a carboxy group, and an isocyanate group.
- the functional group of the acrylic resin may be bonded to another compound via a cross-linking agent (F) described later, or may be directly bonded to another compound not via the cross-linking agent (F). .
- F cross-linking agent
- thermoplastic resin other than the acrylic resin (hereinafter sometimes simply referred to as “thermoplastic resin”) may be used in combination with the acrylic resin.
- thermoplastic resin By using the thermoplastic resin, the peelability of the protective film from the support sheet is improved, and the thermosetting protective film-forming film easily follows the uneven surface of the adherend. The generation of voids and the like may be further suppressed between the protective protective film-forming film.
- the weight average molecular weight of the thermoplastic resin is preferably 1000 to 100,000, more preferably 3000 to 80,000.
- the glass transition temperature (Tg) of the thermoplastic resin is preferably ⁇ 30 to 150 ° C., and more preferably ⁇ 20 to 120 ° C.
- thermoplastic resin examples include polyester, polyurethane, phenoxy resin, polybutene, polybutadiene, and polystyrene.
- thermoplastic resin contained in the protective film-forming composition (III-1) and the thermosetting protective film-forming film may be only one kind, two kinds or more, and when there are two kinds or more, These combinations and ratios can be arbitrarily selected.
- the ratio of the content of the polymer component (A) to the total content of all components other than the solvent that is, the polymer component of the thermosetting protective film forming film
- the content of (A) is preferably 5 to 50% by mass, more preferably 10 to 40% by mass, and 15 to 35% by mass, regardless of the type of the polymer component (A). It is particularly preferred.
- the polymer component (A) may also correspond to the thermosetting component (B).
- the protective film-forming composition (III-1) contains components corresponding to both the polymer component (A) and the thermosetting component (B), the protective film is formed.
- the composition (III-1) for use is considered to contain a polymer component (A) and a thermosetting component (B).
- thermosetting component (B) is a component for curing a thermosetting protective film-forming film to form a hard protective film.
- the thermosetting component (B) contained in the protective film-forming composition (III-1) and the thermosetting protective film-forming film may be one kind, two kinds or more, and two kinds or more. In this case, the combination and ratio can be arbitrarily selected.
- thermosetting component (B) examples include epoxy thermosetting resins, thermosetting polyimides, polyurethanes, unsaturated polyesters, and silicone resins, and epoxy thermosetting resins are preferable.
- the epoxy thermosetting resin includes an epoxy resin (B1) and a thermosetting agent (B2).
- the epoxy thermosetting resin contained in the protective film-forming composition (III-1) and the thermosetting protective film-forming film may be only one type, two or more types, or two or more types. These combinations and ratios can be arbitrarily selected.
- Epoxy resin (B1) examples include known ones such as polyfunctional epoxy resins, biphenyl compounds, bisphenol A diglycidyl ether and hydrogenated products thereof, orthocresol novolac epoxy resins, dicyclopentadiene type epoxy resins, Biphenyl type epoxy resins, bisphenol A type epoxy resins, bisphenol F type epoxy resins, phenylene skeleton type epoxy resins, and the like, and bifunctional or higher functional epoxy compounds are listed.
- an epoxy resin having an unsaturated hydrocarbon group may be used as the epoxy resin (B1).
- An epoxy resin having an unsaturated hydrocarbon group is more compatible with an acrylic resin than an epoxy resin having no unsaturated hydrocarbon group. Therefore, the reliability of the package obtained using the composite sheet for forming a protective film is improved by using an epoxy resin having an unsaturated hydrocarbon group.
- Examples of the epoxy resin having an unsaturated hydrocarbon group include compounds obtained by converting a part of the epoxy group of a polyfunctional epoxy resin into a group having an unsaturated hydrocarbon group. Such a compound can be obtained, for example, by addition reaction of (meth) acrylic acid or a derivative thereof to an epoxy group. Moreover, as an epoxy resin which has an unsaturated hydrocarbon group, the compound etc. which the group which has an unsaturated hydrocarbon group directly couple
- the unsaturated hydrocarbon group is a polymerizable unsaturated group, and specific examples thereof include ethenyl group (vinyl group), 2-propenyl group (allyl group), (meth) acryloyl group, (meth) An acrylamide group etc. are mentioned, An acryloyl group is preferable.
- the “derivative” means one obtained by substituting one or more hydrogen atoms of the original compound with a group (substituent) other than a hydrogen atom.
- the number average molecular weight of the epoxy resin (B1) is not particularly limited, but is 300 to 30000 from the viewpoint of the curability of the thermosetting protective film-forming film and the strength and heat resistance of the cured protective film. Preferably, it is 300 to 10,000, more preferably 300 to 3000.
- the epoxy equivalent of the epoxy resin (B1) is preferably 100 to 1100 g / eq, and more preferably 150 to 1000 g / eq.
- the epoxy resin (B1) may be used alone or in combination of two or more, and when two or more are used in combination, their combination and ratio can be arbitrarily selected.
- thermosetting agent (B2) functions as a curing agent for the epoxy resin (B1).
- a thermosetting agent (B2) the compound which has 2 or more of functional groups which can react with an epoxy group in 1 molecule is mentioned, for example.
- the functional group include a phenolic hydroxyl group, an alcoholic hydroxyl group, an amino group, a carboxy group, a group in which an acid group has been anhydrideized, and the like, and a phenolic hydroxyl group, an amino group, or an acid group has been anhydrideized. It is preferably a group, more preferably a phenolic hydroxyl group or an amino group.
- thermosetting agents (B2) examples of the phenolic curing agent having a phenolic hydroxyl group include polyfunctional phenolic resins, biphenols, novolac-type phenolic resins, dicyclopentadiene-based phenolic resins, and aralkylphenolic resins.
- examples of the amine-based curing agent having an amino group include dicyandiamide (hereinafter sometimes abbreviated as “DICY”).
- the thermosetting agent (B2) may have an unsaturated hydrocarbon group.
- examples of the thermosetting agent (B2) having an unsaturated hydrocarbon group include compounds in which a part of the hydroxyl group of the phenol resin is substituted with a group having an unsaturated hydrocarbon group, and the aromatic ring of the phenol resin. Examples thereof include compounds in which a group having a saturated hydrocarbon group is directly bonded.
- the unsaturated hydrocarbon group in the thermosetting agent (B2) is the same as the unsaturated hydrocarbon group in the epoxy resin having the unsaturated hydrocarbon group described above.
- thermosetting agent (B2) When using a phenolic curing agent as the thermosetting agent (B2), it is preferable that the thermosetting agent (B2) has a high softening point or glass transition temperature in terms of improving the peelability of the protective film from the support sheet. .
- the thermosetting agent (B2) is a solid that is solid at room temperature and does not exhibit curing activity with respect to the epoxy resin (B1), while being dissolved by heating and exhibits curing activity with respect to the epoxy resin (B1) It is preferably a curing agent (hereinafter sometimes abbreviated as “thermally active latent epoxy resin curing agent”).
- the thermoactive latent epoxy resin curing agent is stably dispersed in the epoxy resin (B1) in the thermosetting protective film-forming film at room temperature, but is compatible with the epoxy resin (B1) by heating. Reacts with the epoxy resin (B1).
- the thermally active latent epoxy resin curing agent the storage stability of the protective film-forming composite sheet is significantly improved.
- thermosetting deterioration of the thermosetting protective film-forming film is effectively suppressed.
- thermosetting degree by heating of the film for thermosetting protective film formation becomes higher, the pick-up property of the semiconductor chip with a protective film mentioned later improves more.
- thermally active latent epoxy resin curing agent examples include onium salts, dibasic acid hydrazides, dicyandiamide, and amine adducts of curing agents.
- thermosetting agents (B2) for example, the number average molecular weight of resin components such as polyfunctional phenolic resin, novolac-type phenolic resin, dicyclopentadiene-based phenolic resin, aralkylphenolic resin, etc. is preferably 300 to 30000, It is more preferably 400 to 10,000, and particularly preferably 500 to 3000.
- the molecular weight of non-resin components such as biphenol and dicyandiamide is not particularly limited, but is preferably 60 to 500, for example.
- thermosetting agent (B2) may be used individually by 1 type, may use 2 or more types together, and when using 2 or more types together, those combinations and ratios can be selected arbitrarily.
- the content of the thermosetting agent (B2) is 0. 0 parts by mass with respect to 100 parts by mass of the epoxy resin (B1).
- the amount is preferably 1 to 500 parts by mass, and more preferably 1 to 200 parts by mass.
- the content of the thermosetting component (B) (for example, the total content of the epoxy resin (B1) and the thermosetting agent (B2)) Is preferably 1 to 100 parts by weight, more preferably 1.5 to 85 parts by weight, with respect to 100 parts by weight of the polymer component (A). It is particularly preferred that When the content of the thermosetting component (B) is in such a range, the adhesive force between the protective film and the support sheet is suppressed, and the peelability of the support sheet is improved.
- the protective film-forming composition (III-1) and the thermosetting protective film-forming film may contain a curing accelerator (C).
- the curing accelerator (C) is a component for adjusting the curing rate of the protective film-forming composition (III-1).
- Preferred curing accelerators (C) include, for example, tertiary amines such as triethylenediamine, benzyldimethylamine, triethanolamine, dimethylaminoethanol, tris (dimethylaminomethyl) phenol; 2-methylimidazole, 2-phenylimidazole Imidazoles such as 2-phenyl-4-methylimidazole, 2-phenyl-4,5-dihydroxymethylimidazole, 2-phenyl-4-methyl-5-hydroxymethylimidazole (one or more hydrogen atoms are other than hydrogen atoms)
- the curing accelerator (C) contained in the protective film-forming composition (III-1) and the thermosetting protective film-forming film may be only one type, two or more types, or two or more types. These combinations and ratios can be arbitrarily selected.
- the content of the curing accelerator (C) in the protective film-forming composition (III-1) and the thermosetting protective film-forming film is such that the thermosetting component (B)
- the content is preferably 0.01 to 10 parts by mass, more preferably 0.1 to 5 parts by mass with respect to 100 parts by mass.
- the effect by using a hardening accelerator (C) is acquired more notably because the said content of a hardening accelerator (C) is more than the said lower limit.
- content of a hardening accelerator (C) is below the said upper limit, for example, a highly polar hardening accelerator (C) is in a film for thermosetting protective film formation under high temperature and high humidity conditions. In this case, the effect of suppressing the segregation by moving toward the adhesion interface with the adherend is increased, and the reliability of the package obtained using the composite sheet for forming a protective film is further improved.
- the protective film-forming composition (III-1) and the thermosetting protective film-forming film may contain a filler (D).
- the thermosetting protective film-forming film contains the filler (D)
- the protective film obtained by curing the thermosetting protective film-forming film can easily adjust the thermal expansion coefficient.
- the reliability of the package obtained using the composite sheet for forming the protective film is further improved.
- the moisture absorption rate of a protective film can be reduced or heat dissipation can be improved because the film for thermosetting protective film formation contains a filler (D).
- the filler (D) may be either an organic filler or an inorganic filler, but is preferably an inorganic filler.
- Preferred inorganic fillers include, for example, powders of silica, alumina, talc, calcium carbonate, titanium white, bengara, silicon carbide, boron nitride, and the like; beads formed by spheroidizing these inorganic fillers; surface modification of these inorganic fillers Products; single crystal fibers of these inorganic fillers; glass fibers and the like.
- the inorganic filler is preferably silica or alumina.
- the filler (D) contained in the protective film-forming composition (III-1) and the thermosetting protective film-forming film may be only one type, two or more types, or two or more types. Their combination and ratio can be arbitrarily selected.
- the ratio of the content of the filler (D) to the total content of all components other than the solvent in the protective film forming composition (III-1) (that is, thermosetting protection)
- the content of the filler (D) in the film-forming film is preferably 5 to 80% by mass, more preferably 7 to 60% by mass. Adjustment of said thermal expansion coefficient becomes easier because content of a filler (D) is such a range.
- the protective film-forming composition (III-1) and the thermosetting protective film-forming film may contain a coupling agent (E).
- a coupling agent (E) having a functional group capable of reacting with an inorganic compound or an organic compound By using a coupling agent (E) having a functional group capable of reacting with an inorganic compound or an organic compound, the adhesion and adhesion of the thermosetting protective film-forming film to the adherend can be improved. it can.
- the coupling agent (E) the protective film obtained by curing the thermosetting protective film-forming film has improved water resistance without impairing heat resistance.
- the coupling agent (E) is preferably a compound having a functional group capable of reacting with the functional group of the polymer component (A), the thermosetting component (B), etc., and is preferably a silane coupling agent. More preferred. Preferred examples of the silane coupling agent include 3-glycidyloxypropyltrimethoxysilane, 3-glycidyloxypropylmethyldiethoxysilane, 3-glycidyloxypropyltriethoxysilane, 3-glycidyloxymethyldiethoxysilane, 2- (3,4-epoxycyclohexyl) ethyltrimethoxysilane, 3-methacryloyloxypropyltrimethoxysilane, 3-aminopropyltrimethoxysilane, 3- (2-aminoethylamino) propyltrimethoxysilane, 3- (2-amino Ethylamino) propylmethyldiethoxysilane, 3- (phenyla
- the coupling agent (E) contained in the protective film-forming composition (III-1) and the thermosetting protective film-forming film may be one kind, two kinds or more, and two kinds or more These combinations and ratios can be arbitrarily selected.
- the content of the coupling agent (E) in the protective film-forming composition (III-1) and the thermosetting protective film-forming film is such that the polymer component (A) and The amount is preferably 0.03 to 20 parts by weight, more preferably 0.05 to 10 parts by weight, and more preferably 0.1 to 5 parts by weight with respect to 100 parts by weight as the total content of the thermosetting component (B).
- the part by mass is particularly preferred.
- the content of the coupling agent (E) is equal to or more than the lower limit, the dispersibility of the filler (D) in the resin is improved, and the thermosetting protective film-forming film is adhered to the adherend.
- the effect by using a coupling agent (E), such as a property improvement, is acquired more notably.
- production of an outgas is suppressed more because the said content of a coupling agent (E) is below the said upper limit.
- Crosslinking agent (F) As the polymer component (A), those having functional groups such as vinyl group, (meth) acryloyl group, amino group, hydroxyl group, carboxy group, isocyanate group and the like that can be bonded to other compounds such as the above-mentioned acrylic resin.
- the protective film-forming composition (III-1) and the thermosetting protective film-forming film contain a crosslinking agent (F) for bonding the functional group with another compound to crosslink. Also good. By crosslinking using the crosslinking agent (F), the initial adhesive force and cohesive force of the thermosetting protective film-forming film can be adjusted.
- crosslinking agent (F) examples include organic polyvalent isocyanate compounds, organic polyvalent imine compounds, metal chelate crosslinking agents (crosslinking agents having a metal chelate structure), aziridine crosslinking agents (crosslinking agents having an aziridinyl group), and the like. Is mentioned.
- organic polyvalent isocyanate compound examples include an aromatic polyvalent isocyanate compound, an aliphatic polyvalent isocyanate compound, and an alicyclic polyvalent isocyanate compound (hereinafter, these compounds are collectively referred to as “aromatic polyvalent isocyanate compound and the like”).
- a trimer such as the aromatic polyisocyanate compound, isocyanurate and adduct; a terminal isocyanate urethane prepolymer obtained by reacting the aromatic polyvalent isocyanate compound and the polyol compound. Etc.
- the “adduct body” includes the aromatic polyisocyanate compound, the aliphatic polyisocyanate compound or the alicyclic polyisocyanate compound, and a low amount such as ethylene glycol, propylene glycol, neopentyl glycol, trimethylolpropane or castor oil. It means a reaction product with a molecularly active hydrogen-containing compound, and examples thereof include an xylylene diisocyanate adduct of trimethylolpropane as described later.
- the “terminal isocyanate urethane prepolymer” is as described above.
- organic polyvalent isocyanate compound for example, 2,4-tolylene diisocyanate; 2,6-tolylene diisocyanate; 1,3-xylylene diisocyanate; 1,4-xylene diisocyanate; diphenylmethane-4 Dimethylmethane-2,4'-diisocyanate; 3-methyldiphenylmethane diisocyanate; hexamethylene diisocyanate; isophorone diisocyanate; dicyclohexylmethane-4,4'-diisocyanate; dicyclohexylmethane-2,4'-diisocyanate; trimethylol Any one of tolylene diisocyanate, hexamethylene diisocyanate and xylylene diisocyanate is added to all or some hydroxyl groups of a polyol such as propane. Or two or more compounds are added; lysine diisocyanate.
- a polyol such as propane.
- organic polyvalent imine compound examples include N, N′-diphenylmethane-4,4′-bis (1-aziridinecarboxamide), trimethylolpropane-tri- ⁇ -aziridinylpropionate, and tetramethylolmethane.
- -Tri- ⁇ -aziridinylpropionate, N, N′-toluene-2,4-bis (1-aziridinecarboxamide) triethylenemelamine and the like.
- crosslinking agent (F) When an organic polyvalent isocyanate compound is used as the crosslinking agent (F), it is preferable to use a hydroxyl group-containing polymer as the polymer component (A).
- a reaction between the crosslinking agent (F) and the polymer component (A) results in a thermosetting protective film forming film.
- a crosslinked structure can be easily introduced.
- the crosslinking agent (F) contained in the protective film-forming composition (III-1) and the thermosetting protective film-forming film may be only one type, two or more types, or two or more types. Their combination and ratio can be arbitrarily selected.
- the content of the crosslinking agent (F) in the protective film-forming composition (III-1) is 0. 0 parts by mass relative to 100 parts by mass of the polymer component (A).
- the amount is preferably 01 to 20 parts by mass, more preferably 0.1 to 10 parts by mass, and particularly preferably 0.5 to 5 parts by mass.
- the effect by using a crosslinking agent (F) is acquired more notably because the said content of a crosslinking agent (F) is more than the said lower limit.
- the content of the crosslinking agent (F) is not more than the upper limit value, the adhesive force with the support sheet of the thermosetting protective film forming film, the semiconductor wafer of the thermosetting protective film forming film, or It is suppressed that the adhesive force with a semiconductor chip falls too much.
- the effects of the present invention can be sufficiently obtained without using the crosslinking agent (F).
- the protective film-forming composition (III-1) may contain an energy ray curable resin (G). Since the thermosetting protective film-forming film contains the energy ray-curable resin (G), the characteristics can be changed by irradiation with energy rays.
- the energy beam curable resin (G) is obtained by polymerizing (curing) an energy beam curable compound.
- the energy ray curable compound include compounds having at least one polymerizable double bond in the molecule, and acrylate compounds having a (meth) acryloyl group are preferable.
- acrylate compound examples include trimethylolpropane tri (meth) acrylate, tetramethylolmethanetetra (meth) acrylate, pentaerythritol tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol monohydroxypenta ( Chain aliphatic skeleton-containing (meth) acrylates such as (meth) acrylate, dipentaerythritol hexa (meth) acrylate, 1,4-butylene glycol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate; Cyclic aliphatic skeleton-containing (meth) acrylates such as cyclopentanyl di (meth) acrylate; polyalkylene glycol (meth) acrylates such as polyethylene glycol di (meth) acrylate Oligoester (meth)
- the weight average molecular weight of the energy ray curable compound is preferably 100 to 30000, and more preferably 300 to 10000.
- the energy ray-curable compound used for the polymerization may be only one type, or two or more types, and in the case of two or more types, the combination and ratio thereof can be arbitrarily selected.
- the energy ray-curable resin (G) contained in the protective film-forming composition (III-1) may be only one type, two or more types, and in the case of two or more types, the combination and ratio thereof are as follows: Can be arbitrarily selected.
- the content of the energy ray curable resin (G) is preferably 1 to 95% by mass, more preferably 2 to 90% by mass. It is particularly preferable that the content be ⁇ 85% by mass.
- Photopolymerization initiator (H) When the protective film-forming composition (III-1) contains the energy beam curable resin (G), the photopolymerization initiator (H) is used to efficiently advance the polymerization reaction of the energy beam curable resin (G). ) May be contained.
- Examples of the photopolymerization initiator (H) in the protective film-forming composition (III-1) include the same photopolymerization initiator as in the pressure-sensitive adhesive composition (ii).
- the photopolymerization initiator (H) contained in the protective film-forming composition (III-1) may be only one type, or two or more types, and when there are two or more types, the combination and ratio thereof are arbitrary. Can be selected.
- the content of the photopolymerization initiator (H) is 0.1 to 20 parts by mass with respect to 100 parts by mass of the energy beam curable resin (G). It is preferably 1 to 10 parts by mass, more preferably 2 to 5 parts by mass.
- the protective film-forming composition (III-1) and the thermosetting protective film-forming film may contain a colorant (I).
- a colorant (I) include known pigments such as inorganic pigments, organic pigments, and organic dyes.
- organic pigments and organic dyes examples include aminium dyes, cyanine dyes, merocyanine dyes, croconium dyes, squalium dyes, azurenium dyes, polymethine dyes, naphthoquinone dyes, pyrylium dyes, and phthalocyanines.
- the inorganic pigment examples include carbon black, cobalt dye, iron dye, chromium dye, titanium dye, vanadium dye, zirconium dye, molybdenum dye, ruthenium dye, platinum dye, ITO ( Indium tin oxide) dyes, ATO (antimony tin oxide) dyes, and the like.
- the colorant (I) contained in the protective film-forming composition (III-1) and the thermosetting protective film-forming film may be only one type, two or more types, or two or more types. Their combination and ratio can be arbitrarily selected.
- the content of the colorant (I) in the thermosetting protective film-forming film may be appropriately adjusted according to the purpose.
- the protective film may be printed by laser irradiation, adjusting the content of the colorant (I) of the thermosetting protective film-forming film, and adjusting the light transmittance of the protective film, Print visibility can be adjusted. Further, by adjusting the content of the colorant (I) in the thermosetting protective film-forming film, it is possible to improve the design of the protective film or make it difficult to see the grinding marks on the back surface of the semiconductor wafer.
- the ratio of the content of the colorant (I) to the total content of all components other than the solvent is preferably 0.1 to 10% by mass, more preferably 0.1 to 7.5% by mass, and 0.1 to 5% by mass. It is particularly preferred that When the content of the colorant (I) is equal to or more than the lower limit value, the effect of using the colorant (I) is more remarkably obtained. Moreover, the excessive fall of the light transmittance of the film for thermosetting protective film formation is suppressed because the said content of a coloring agent (I) is below the said upper limit.
- the protective film-forming composition (III-1) and the thermosetting protective film-forming film may contain a general-purpose additive (J) within a range not impairing the effects of the present invention.
- the general-purpose additive (J) may be a known one, and can be arbitrarily selected according to the purpose, and is not particularly limited. Is mentioned.
- the general-purpose additive (I) contained in the protective film-forming composition (III-1) and the thermosetting protective film-forming film may be only one, two or more, or two or more These combinations and ratios can be arbitrarily selected.
- the content of the general-purpose additive (I) in the protective film-forming composition (III-1) and the thermosetting protective film-forming film is not particularly limited, and may be appropriately selected depending on the purpose.
- the composition for forming a protective film (III-1) preferably further contains a solvent.
- the protective film-forming composition (III-1) containing a solvent has good handleability.
- the solvent is not particularly limited. Preferred examples include hydrocarbons such as toluene and xylene; alcohols such as methanol, ethanol, 2-propanol, isobutyl alcohol (2-methylpropan-1-ol), and 1-butanol.
- esters such as ethyl acetate and butyl acetate; ketones such as acetone and methyl ethyl ketone; ethers such as tetrahydrofuran; amides (compounds having an amide bond) such as dimethylformamide and N-methylpyrrolidone;
- the solvent contained in the protective film-forming composition (III-1) may be only one type, or two or more types, and in the case of two or more types, the combination and ratio thereof can be arbitrarily selected.
- the solvent contained in the protective film-forming composition (III-1) is preferably methyl ethyl ketone or the like from the viewpoint that the components in the protective film-forming composition (III-1) can be more uniformly mixed.
- thermosetting protective film-forming composition such as the protective film-forming composition (III-1) can be obtained by blending each component for constituting the composition.
- the order of addition at the time of blending each component is not particularly limited, and two or more components may be added simultaneously.
- a solvent it may be used by mixing the solvent with any compounding component other than the solvent and diluting the compounding component in advance, or by diluting any compounding component other than the solvent in advance. You may use it by mixing a solvent with these compounding ingredients, without leaving.
- the method of mixing each component at the time of compounding is not particularly limited, from a known method such as a method of mixing by rotating a stirrer or a stirring blade; a method of mixing using a mixer; a method of mixing by applying ultrasonic waves What is necessary is just to select suitably.
- the temperature and time during the addition and mixing of each component are not particularly limited as long as each compounding component does not deteriorate, and may be adjusted as appropriate, but the temperature is preferably 15 to 30 ° C.
- the film for forming an energy beam curable protective film contains an energy beam curable component (a).
- the energy ray curable component (a) is preferably uncured, preferably tacky, and more preferably uncured and tacky.
- energy beam and “energy beam curability” are as described above.
- the film for forming an energy ray-curable protective film can be formed using the composition for forming an energy ray-curable protective film containing the constituent materials.
- the energy ray curable protective film is applied to the target surface of the film for forming the energy ray curable protective film, and the energy ray curable protection is applied to the target site by applying the composition for forming the energy ray curable protective film and drying it as necessary.
- a film-forming film can be formed.
- the ratio of the contents of components that do not vaporize at room temperature is usually the same as the ratio of the contents of the components of the film for forming an energy ray-curable protective film.
- “normal temperature” is as described above.
- Application of the energy ray curable protective film-forming composition may be performed by a known method, for example, an air knife coater, blade coater, bar coater, gravure coater, roll coater, roll knife coater, curtain coater, die coater. And a method using various coaters such as a knife coater, a screen coater, a Meyer bar coater, and a kiss coater.
- the drying conditions of the energy ray-curable protective film-forming composition are not particularly limited, but the energy ray-curable protective film-forming composition preferably comprises heat drying when it contains a solvent described later. In this case, for example, drying is preferably performed at 70 to 130 ° C. for 10 seconds to 5 minutes.
- composition for forming protective film (IV-1) for example, the composition for forming an energy ray-curable protective film (IV-1) containing the energy ray-curable component (a) (in this specification, simply And the like (may be abbreviated as “protective film-forming composition (IV-1)”).
- the energy ray-curable component (a) is a component that is cured by irradiation with energy rays, and is also a component for imparting film forming property, flexibility, and the like to the energy ray-curable protective film-forming film.
- Examples of the energy ray-curable component (a) include a polymer (a1) having an energy ray-curable group and a weight average molecular weight of 80000 to 2000000, and an energy ray-curable group and a molecular weight of 100 to 80000.
- a compound (a2) is mentioned.
- the polymer (a1) may be crosslinked at least partly with a crosslinking agent or may not be crosslinked.
- Polymer (a1) having an energy ray curable group and having a weight average molecular weight of 80,000 to 2,000,000 examples include an acrylic polymer (a11) having a functional group capable of reacting with a group of another compound, An acrylic resin (a1-1) formed by addition reaction of a functional group reactive group and an energy ray curable compound (a12) having an energy ray curable group such as an energy ray curable double bond. It is done.
- Examples of the functional group capable of reacting with a group possessed by another compound include a hydroxyl group, a carboxy group, an amino group, and a substituted amino group (one or two hydrogen atoms of the amino group are substituted with a group other than a hydrogen atom). Group), an epoxy group, and the like.
- the functional group is preferably a group other than a carboxy group from the viewpoint of preventing corrosion of a circuit such as a semiconductor wafer or a semiconductor chip.
- the functional group is preferably a hydroxyl group.
- the acrylic polymer (a11) having the functional group examples include those obtained by copolymerizing an acrylic monomer having the functional group and an acrylic monomer having no functional group. In addition to monomers, monomers other than acrylic monomers (non-acrylic monomers) may be copolymerized.
- the acrylic polymer (a11) may be a random copolymer or a block copolymer.
- acrylic monomer having a functional group examples include a hydroxyl group-containing monomer, a carboxy group-containing monomer, an amino group-containing monomer, a substituted amino group-containing monomer, and an epoxy group-containing monomer.
- hydroxyl group-containing monomer examples include hydroxymethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 3-hydroxypropyl (meth) acrylate, (meth) Hydroxyalkyl (meth) acrylates such as 2-hydroxybutyl acrylate, 3-hydroxybutyl (meth) acrylate, and 4-hydroxybutyl (meth) acrylate; non- (meth) acrylic non-methacrylates such as vinyl alcohol and allyl alcohol Saturated alcohol (unsaturated alcohol which does not have a (meth) acryloyl skeleton) etc. are mentioned.
- Examples of the carboxy group-containing monomer include ethylenically unsaturated monocarboxylic acids (monocarboxylic acids having an ethylenically unsaturated bond) such as (meth) acrylic acid and crotonic acid; fumaric acid, itaconic acid, maleic acid, citracone Ethylenically unsaturated dicarboxylic acids such as acids (dicarboxylic acids having an ethylenically unsaturated bond); anhydrides of the ethylenically unsaturated dicarboxylic acids; carboxyalkyl esters of (meth) acrylic acid such as 2-carboxyethyl methacrylate, etc. It is done.
- monocarboxylic acids having an ethylenically unsaturated bond such as (meth) acrylic acid and crotonic acid
- fumaric acid, itaconic acid maleic acid, citracone
- Ethylenically unsaturated dicarboxylic acids such as acids (dica
- the acrylic monomer having a functional group is preferably a hydroxyl group-containing monomer or a carboxy group-containing monomer, more preferably a hydroxyl group-containing monomer.
- the acrylic monomer having the functional group that constitutes the acrylic polymer (a11) may be only one type, or two or more types, and when there are two or more types, the combination and ratio thereof are arbitrary. You can choose.
- acrylic monomer having no functional group examples include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, and (meth) acrylic.
- N-butyl acid isobutyl (meth) acrylate, sec-butyl (meth) acrylate, tert-butyl (meth) acrylate, pentyl (meth) acrylate, hexyl (meth) acrylate, heptyl (meth) acrylate 2-ethylhexyl (meth) acrylate, isooctyl (meth) acrylate, n-octyl (meth) acrylate, n-nonyl (meth) acrylate, isononyl (meth) acrylate, decyl (meth) acrylate, ( Undecyl (meth) acrylate, dodecyl (meth) acrylate (lauric (meth) acrylate ), Tridecyl (meth) acrylate, tetradecyl (meth) acrylate (myristyl (meth) acrylate), pent
- acrylic monomer having no functional group examples include alkoxy such as methoxymethyl (meth) acrylate, methoxyethyl (meth) acrylate, ethoxymethyl (meth) acrylate, and ethoxyethyl (meth) acrylate.
- the acrylic monomer which does not have the functional group constituting the acrylic polymer (a11) may be only one type, or two or more types, and when there are two or more types, the combination and ratio thereof are arbitrary. Can be selected.
- non-acrylic monomer examples include olefins such as ethylene and norbornene; vinyl acetate; styrene.
- the said non-acrylic monomer which comprises the said acrylic polymer (a11) may be only 1 type, may be 2 or more types, and when it is 2 or more types, those combinations and ratios can be selected arbitrarily.
- the ratio (content) of the amount of the structural unit derived from the acrylic monomer having the functional group to the total amount of the structural unit constituting the polymer is 0.1 to 50 mass. %, More preferably 1 to 40% by mass, and particularly preferably 3 to 30% by mass.
- the acrylic resin (a1-1) obtained by copolymerization of the acrylic polymer (a11) and the energy ray-curable compound (a12) The content of the linear curable group can be easily adjusted within a preferable range of the degree of curing of the protective film.
- the acrylic polymer (a11) constituting the acrylic resin (a1-1) may be only one type, or two or more types, and when there are two or more types, the combination and ratio thereof are arbitrary. You can choose.
- the content of the acrylic resin (a1-1) is preferably 1 to 40% by mass, more preferably 2 to 30% by mass. A content of ⁇ 20% by weight is particularly preferred.
- the energy ray curable compound (a12) is one or two selected from the group consisting of an isocyanate group, an epoxy group and a carboxy group as a group capable of reacting with the functional group of the acrylic polymer (a11). Those having the above are preferred, and those having an isocyanate group as the group are more preferred. For example, when the energy beam curable compound (a12) has an isocyanate group as the group, the isocyanate group easily reacts with the hydroxyl group of the acrylic polymer (a11) having a hydroxyl group as the functional group.
- the energy beam curable compound (a12) preferably has 1 to 5 energy beam curable groups in one molecule, and more preferably has 1 to 2 energy beam curable groups.
- Examples of the energy ray curable compound (a12) include 2-methacryloyloxyethyl isocyanate, meta-isopropenyl- ⁇ , ⁇ -dimethylbenzyl isocyanate, methacryloyl isocyanate, allyl isocyanate, 1,1- (bisacryloyloxymethyl).
- Ethyl isocyanate An acryloyl monoisocyanate compound obtained by reacting a diisocyanate compound or polyisocyanate compound with hydroxyethyl (meth) acrylate; Examples thereof include an acryloyl monoisocyanate compound obtained by a reaction of a diisocyanate compound or a polyisocyanate compound, a polyol compound, and hydroxyethyl (meth) acrylate.
- the energy beam curable compound (a12) is preferably 2-methacryloyloxyethyl isocyanate.
- the energy ray-curable compound (a12) constituting the acrylic resin (a1-1) may be only one type, or two or more types, and when there are two or more types, the combination and ratio thereof are arbitrary. Can be selected.
- the content of the energy beam curable group derived from the energy beam curable compound (a12) with respect to the content of the functional group derived from the acrylic polymer (a11). is preferably 20 to 120 mol%, more preferably 35 to 100 mol%, and particularly preferably 50 to 100 mol%. When the ratio of the content is within such a range, the adhesive force of the protective film after curing is further increased.
- the upper limit of the content ratio is 100 mol%
- the energy ray curable compound (a12) is a polyfunctional compound (having two or more of the groups in one molecule)
- the upper limit of the content ratio may exceed 100 mol%.
- the polymer (a1) has a weight average molecular weight (Mw) of preferably 100,000 to 2,000,000, and more preferably 300,000 to 1500,000.
- Mw weight average molecular weight
- the “weight average molecular weight” is as described above.
- the polymer (a1) is at least partially crosslinked by a crosslinking agent
- the polymer (a1) has been described as constituting the acrylic polymer (a11).
- a monomer that does not correspond to any of the monomers and has a group that reacts with the crosslinking agent is polymerized to be crosslinked at the group that reacts with the crosslinking agent, or the energy ray-curable compound ( In the group which reacts with the functional group derived from a12), it may be crosslinked.
- the polymer (a1) contained in the protective film-forming composition (IV-1) and the energy ray-curable protective film-forming film may be only one kind, two kinds or more, and two kinds or more. In such a case, the combination and ratio thereof can be arbitrarily selected.
- Compound (a2) having an energy ray curable group and a molecular weight of 100 to 80,000 examples include a group containing an energy ray curable double bond. Preferred examples include (meth) An acryloyl group, a vinyl group, etc. are mentioned.
- the compound (a2) is not particularly limited as long as it satisfies the above conditions, but has a low molecular weight compound having an energy ray curable group, an epoxy resin having an energy ray curable group, and an energy ray curable group.
- a phenol resin etc. are mentioned.
- examples of the low molecular weight compound having an energy ray curable group include polyfunctional monomers or oligomers, and an acrylate compound having a (meth) acryloyl group is preferable.
- examples of the acrylate compound include 2-hydroxy-3- (meth) acryloyloxypropyl methacrylate, polyethylene glycol di (meth) acrylate, propoxylated ethoxylated bisphenol A di (meth) acrylate, and 2,2-bis [4 -((Meth) acryloxypolyethoxy) phenyl] propane, ethoxylated bisphenol A di (meth) acrylate, 2,2-bis [4-((meth) acryloxydiethoxy) phenyl] propane, 9,9-bis [4- (2- (meth) acryloyloxyethoxy) phenyl] fluorene, 2,2-bis [4-((meth) acryloxypolypropoxy) phenyl] propane,
- the epoxy resin having an energy ray curable group and the phenol resin having an energy ray curable group are described in, for example, paragraph 0043 of “JP 2013-194102 A”. Things can be used.
- Such a resin corresponds to a resin constituting a thermosetting component described later, but is handled as the compound (a2) in the present embodiment.
- the compound (a2) preferably has a weight average molecular weight of 100 to 30,000, more preferably 300 to 10,000.
- the compound (a2) contained in the protective film-forming composition (IV-1) and the energy ray-curable protective film-forming film may be one kind, two kinds or more, or two kinds or more These combinations and ratios can be arbitrarily selected.
- Polymer (b) having no energy ray curable group When the protective film-forming composition (IV-1) and the energy ray-curable protective film-forming film contain the compound (a2) as the energy ray-curable component (a), an energy ray-curable group is further added. It is also preferable to contain the polymer (b) that is not included.
- the polymer (b) may be crosslinked at least partially by a crosslinking agent, or may not be crosslinked.
- polymer (b) having no energy ray curable group examples include acrylic polymers, phenoxy resins, urethane resins, polyesters, rubber resins, and acrylic urethane resins.
- the polymer (b) is preferably an acrylic polymer (hereinafter sometimes abbreviated as “acrylic polymer (b-1)”).
- the acrylic polymer (b-1) may be a known one, for example, a homopolymer of one acrylic monomer or a copolymer of two or more acrylic monomers. Alternatively, it may be a copolymer of one or two or more acrylic monomers and a monomer (non-acrylic monomer) other than one or two or more acrylic monomers.
- acrylic monomer constituting the acrylic polymer (b-1) examples include (meth) acrylic acid alkyl ester, (meth) acrylic acid ester having a cyclic skeleton, glycidyl group-containing (meth) acrylic acid ester, Examples include hydroxyl group-containing (meth) acrylic acid esters and substituted amino group-containing (meth) acrylic acid esters.
- substituted amino group is as described above.
- Examples of the (meth) acrylic acid alkyl ester include, for example, methyl (meth) acrylate, ethyl (meth) acrylate, n-propyl (meth) acrylate, isopropyl (meth) acrylate, and n- (meth) acrylate.
- Examples of the (meth) acrylic acid ester having a cyclic skeleton include (meth) acrylic acid cycloalkyl esters such as isobornyl (meth) acrylate and dicyclopentanyl (meth) acrylate; (Meth) acrylic acid aralkyl esters such as (meth) acrylic acid benzyl; (Meth) acrylic acid cycloalkenyl esters such as (meth) acrylic acid dicyclopentenyl ester; Examples include (meth) acrylic acid cycloalkenyloxyalkyl esters such as (meth) acrylic acid dicyclopentenyloxyethyl ester.
- Examples of the glycidyl group-containing (meth) acrylic ester include glycidyl (meth) acrylate.
- Examples of the hydroxyl group-containing (meth) acrylic acid ester include hydroxymethyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and 3-hydroxy (meth) acrylate. Examples include propyl, 2-hydroxybutyl (meth) acrylate, 3-hydroxybutyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and the like.
- Examples of the substituted amino group-containing (meth) acrylic acid ester include N-methylaminoethyl (meth) acrylate.
- non-acrylic monomer constituting the acrylic polymer (b-1) examples include olefins such as ethylene and norbornene; vinyl acetate; styrene.
- Examples of the polymer (b) that is at least partially crosslinked by a crosslinking agent and does not have an energy ray-curable group include those in which a reactive functional group in the polymer (b) has reacted with a crosslinking agent. Can be mentioned.
- the reactive functional group may be appropriately selected according to the type of the crosslinking agent and the like, and is not particularly limited.
- examples of the reactive functional group include a hydroxyl group, a carboxy group, and an amino group. Among these, a hydroxyl group having high reactivity with an isocyanate group is preferable.
- the crosslinking agent is an epoxy compound
- examples of the reactive functional group include a carboxy group, an amino group, an amide group, and the like. Among these, a carboxy group having high reactivity with an epoxy group is preferable.
- the reactive functional group is preferably a group other than a carboxy group in terms of preventing corrosion of a circuit of a semiconductor wafer or a semiconductor chip.
- Examples of the polymer (b) having the reactive functional group and not having the energy ray-curable group include those obtained by polymerizing at least the monomer having the reactive functional group.
- examples of the polymer (b) having a hydroxyl group as a reactive functional group include those obtained by polymerizing a hydroxyl group-containing (meth) acrylic acid ester.
- Examples of the acrylic monomer or non-acrylic monomer include those obtained by polymerizing a monomer in which one or two or more hydrogen atoms are substituted with the reactive functional group.
- the ratio (content) of the amount of the structural unit derived from the monomer having the reactive functional group to the total amount of the structural unit constituting the polymer (b) is 1-20.
- the mass is preferably 2% by mass, and more preferably 2 to 10% by mass. When the ratio is within such a range, the degree of cross-linking becomes a more preferable range in the polymer (b).
- the weight average molecular weight (Mw) of the polymer (b) having no energy ray-curable group is 10,000 to 2,000,000 from the viewpoint that the film-forming property of the protective film-forming composition (IV-1) becomes better. It is preferably 100000 to 1500,000.
- the “weight average molecular weight” is as described above.
- the polymer (b) having no energy ray-curable group contained in the protective film-forming composition (IV-1) and the energy ray-curable protective film-forming film may be only one kind or two or more kinds. However, when there are two or more kinds, the combination and ratio thereof can be arbitrarily selected.
- Examples of the protective film-forming composition (IV-1) include those containing one or both of the polymer (a1) and the compound (a2).
- the protective film-forming composition (IV-1) contains the compound (a2), it preferably contains a polymer (b) that does not have an energy ray-curable group. It is also preferable to contain (a1). Further, the protective film-forming composition (IV-1) does not contain the compound (a2) and contains both the polymer (a1) and the polymer (b) having no energy ray-curable group. It may be.
- the protective film-forming composition (IV-1) contains the polymer (a1), the compound (a2) and the polymer (b) having no energy ray-curable group
- the protective film-forming composition In (IV-1) the content of the compound (a2) is 10 to 10 parts per 100 parts by mass of the total content of the polymer (a1) and the polymer (b) having no energy ray-curable group.
- the amount is preferably 400 parts by mass, and more preferably 30 to 350 parts by mass.
- the total content of the energy beam curable component (a) and the polymer (b) having no energy beam curable group with respect to the total content of components other than the solvent is 5 to 90% by mass. It is preferably 10 to 80% by mass, more preferably 20 to 70% by mass.
- the ratio of the content of the energy ray curable component is within such a range, the energy ray curable film of the energy ray curable protective film forming film becomes more favorable.
- the protective film-forming composition (IV-1) includes a thermosetting component, a photopolymerization initiator, a filler, a coupling agent, a crosslinking agent, a colorant, You may contain 1 type, or 2 or more types selected from the group which consists of a general purpose additive.
- the protective film forming composition (IV-1) containing the energy ray curable component and the thermosetting component the formed energy ray curable protective film forming film is deposited by heating. The adhesive force to the body is improved, and the strength of the protective film formed from this energy ray-curable protective film-forming film is also improved.
- thermosetting component photopolymerization initiator, filler, coupling agent, crosslinking agent, colorant and general-purpose additive in the protective film-forming composition (IV-1), the protective film-forming composition, respectively.
- Thermosetting component (B), photopolymerization initiator (H), filler (D), coupling agent (E), crosslinking agent (F), colorant (I) and general-purpose additives in (III-1) The same thing as (J) is mentioned.
- each of the thermosetting component, the photopolymerization initiator, the filler, the coupling agent, the crosslinking agent, the colorant, and the general-purpose additive is used alone.
- two or more types may be used in combination, and when two or more types are used in combination, their combination and ratio can be arbitrarily selected.
- the contents of the thermosetting component, photopolymerization initiator, filler, coupling agent, crosslinking agent, colorant and general-purpose additive in the protective film-forming composition (IV-1) are appropriately adjusted according to the purpose. There is no particular limitation.
- the protective film-forming composition (IV-1) preferably further contains a solvent since its handleability is improved by dilution.
- the solvent contained in the protective film forming composition (IV-1) include the same solvents as those in the protective film forming composition (III-1).
- the solvent contained in the protective film-forming composition (IV-1) may be only one kind or two or more kinds.
- composition for forming an energy ray-curable protective film such as the protective film-forming composition (IV-1) can be obtained by blending each component for constituting the composition.
- the order of addition at the time of blending each component is not particularly limited, and two or more components may be added simultaneously.
- a solvent it may be used by mixing the solvent with any compounding component other than the solvent and diluting the compounding component in advance, or by diluting any compounding component other than the solvent in advance. You may use it by mixing a solvent with these compounding ingredients, without leaving.
- the method of mixing each component at the time of compounding is not particularly limited, from a known method such as a method of mixing by rotating a stirrer or a stirring blade; a method of mixing using a mixer; a method of mixing by applying ultrasonic waves What is necessary is just to select suitably.
- the temperature and time during the addition and mixing of each component are not particularly limited as long as each compounding component does not deteriorate, and may be adjusted as appropriate, but the temperature is preferably 15 to 30 ° C.
- Coating layer is not particularly limited as long as the gloss value on the surface opposite to the side in contact with the support sheet is 32 to 95.
- a coating layer for example, a layer containing a cured product obtained by curing by irradiation with energy rays is preferable, and a coating composition containing an energy beam polymerizable compound that is polymerized by irradiation with energy rays is cured. What was obtained was preferable. And it is preferable that the said energy-beam polymeric compound is (meth) acrylic acid or its derivative (s).
- the protective sheet-forming composite sheet has not only a function of forming a protective film for protecting the back surface of the semiconductor chip obtained by dicing, but also a function as a dicing sheet when dicing a semiconductor wafer, for example. It can be combined. When the semiconductor wafer is diced, the semiconductor wafer to which the protective film-forming composite sheet is attached may be expanded. In that case, the protective film-forming composite sheet is required to have appropriate flexibility.
- a flexible resin such as polypropylene may be selected as a material constituting the support sheet. On the other hand, such a flexible resin may be deformed by heating or may have wrinkles. Therefore, it can be said that the coating layer is preferably one that can be formed by curing the composition as a raw material not by heat curing but by irradiation with energy rays.
- the thickness of the coating layer is not particularly limited, but is preferably 0.1 to 20 ⁇ m, more preferably 0.4 to 15 ⁇ m, and particularly preferably 0.8 to 10 ⁇ m.
- the thickness of the coating layer is equal to or more than the lower limit value, it becomes easier to reduce the surface roughness Ra on the surface of the coating layer opposite to the side in contact with the support sheet. The effect of suppressing blocking of the forming composite sheet is further increased.
- the thickness of the coating layer is equal to or less than the upper limit value, the state of the semiconductor wafer after the protective film-forming composite sheet is pasted is examined by an infrared camera or the like through the sheet. A clearer inspection image can be acquired, and further, dicing of the semiconductor wafer with expansion can be performed more easily.
- the coating layer covers the uneven surface of the support sheet as described above, so that the contact surface with the support sheet can be an uneven surface, but the thickness of the coating layer is the convex portion on the uneven surface of the coating layer. In a region including, the tip of the convex portion may be calculated as one starting point.
- the surface roughness Ra on the surface of the coating layer opposite to the side in contact with the support sheet is preferably 0.5 ⁇ m or less, more preferably 0.4 ⁇ m or less, and 0.3 ⁇ m. More preferably, it is more preferably 0.2 ⁇ m or less.
- the surface roughness Ra of the coating layer is not more than the upper limit value, laser printing can be performed more clearly on the protective film.
- the lower limit value of the surface roughness Ra on the surface of the coating layer on the side opposite to the side in contact with the support sheet is not particularly limited, but may be 0.005 ⁇ m, for example.
- the surface roughness Ra of the coating layer is, for example, the surface roughness Ra of the surface of the support sheet provided with the coating layer, the thickness of the coating layer, and the application of a coating composition to be described later for forming the coating layer. It can be adjusted by the construction method.
- the coating layer has a value of [thickness of coating layer ( ⁇ m)] / [surface roughness Ra ( ⁇ m) of the surface of the support sheet provided with the coating layer] of 0.1 to 30 Is more preferable, 0.3 to 20 is more preferable, and 0.5 to 10 is particularly preferable.
- the value is equal to or greater than the lower limit value, the surface roughness Ra on the surface of the coating layer opposite to the side in contact with the support sheet becomes smaller, and the laser is more clearly formed on the protective film. Printing can be performed, and the effect of suppressing blocking of the protective film-forming composite sheet is further enhanced. Moreover, it is avoided that the thickness of a coating layer becomes excessive because the said value is below the said upper limit.
- the gloss value of the surface of the coating layer opposite to the side in contact with the support sheet (the support sheet side) is 32 to 95, preferably 40 to 90, and preferably 45 to 85. It is more preferable. When the gloss value of the coating layer is in such a range, laser printing can be performed more clearly on the protective film. Furthermore, when the gloss value of the coating layer is equal to or more than the lower limit value, the state of the semiconductor wafer after the protective film-forming composite sheet is pasted is inspected with an infrared camera or the like through the sheet. A clearer inspection image can be acquired.
- the gloss value of the coating layer is less than or equal to the upper limit value, the phenomenon that the coating layer shines is similarly suppressed when inspecting the state of the semiconductor wafer, and the inspection image can be more visually recognized by an infrared camera or the like. It becomes easy.
- the measured value of haze from the coating layer side of the composite sheet for forming a protective film is preferably 47% or less, more preferably 1 to 47%, still more preferably 2 to 40%, It is particularly preferably 3 to 30%.
- the haze of the composite sheet for forming a protective film is less than or equal to the upper limit value, light scattering is suppressed, and laser printing can be performed more clearly on the protective film. Further, when the state of the semiconductor wafer after the protective film-forming composite sheet is attached is inspected with an infrared camera or the like through the sheet, a clearer inspection image can be acquired.
- the measured value of the haze of the protective film-forming composite sheet is measured from the direction of the surface opposite to the side of the coating layer in contact with the support sheet in the protective film-forming composite sheet.
- the haze is a value obtained by measurement according to JIS K 7136.
- the gloss value of the coating layer can be adjusted by, for example, the thickness of the coating layer, the components of the coating composition to be described later for forming the coating layer, and the like.
- the measured value of haze from the coating layer side of the protective film-forming composite sheet is, for example, the thickness of each layer constituting the protective film-forming composite sheet, such as a coating layer or a support sheet, for forming each of these layers. It can be adjusted by the components contained in the composition (for example, a coating composition described later).
- the coating composition is either one or both of silica sol and silica fine particles to which a radical polymerizable unsaturated group-containing organic compound is bonded ( ⁇ ) (hereinafter sometimes abbreviated as “component ( ⁇ )”). And one or more ( ⁇ ) selected from the group consisting of a polyfunctional acrylate monomer and an acrylate prepolymer (hereinafter sometimes abbreviated as “component ( ⁇ )”) are preferred.
- Component ( ⁇ ) The component ( ⁇ ) lowers the refractive index of the coating layer and lowers the curing shrinkage and the heat and humidity shrinkage of the protective film-forming composite sheet. This suppresses the occurrence of curling in the sheet.
- silica sol in the component ( ⁇ ) examples include colloidal silica in which silica fine particles are suspended in a colloidal state in an organic solvent such as alcohol or ether derived from ethylene glycol (cellosolve).
- the average particle diameter of the silica fine particles is preferably 0.001 to 1 ⁇ m, and more preferably 0.03 to 0.05 ⁇ m.
- the silica fine particles to which the radical polymerizable unsaturated group-containing organic compound in the component ( ⁇ ) is bonded are cross-linked and cured by irradiation with energy rays.
- a silanol group present on the surface of the silica fine particles reacts with a functional group in the radical polymerizable unsaturated group-containing organic compound.
- the average particle diameter of the silica fine particles is preferably 0.005 to 1 ⁇ m.
- the functional group in the radical polymerizable unsaturated group-containing organic compound is not particularly limited as long as it can react with the silanol group in the silica fine particles.
- radical polymerizable unsaturated group-containing organic compound having the functional group examples include compounds represented by the following general formula (1).
- R 1 is a hydrogen atom or a methyl group
- R 2 is a halogen atom or a group represented by any of the following formulas (2a) to (2f)).
- halogen atom in R 2 for example, elemental chlorine, bromine atom, and an iodine atom.
- Preferred examples of the radical polymerizable unsaturated group-containing organic compound include (meth) acrylic acid, (meth) acrylic acid chloride, (meth) acrylic acid 2-isocyanatoethyl, (meth) acrylic acid glycidyl, ( Examples include 2,3-iminopropyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, (3- (meth) acryloyloxypropyl) trimethoxysilane, and the like.
- the radical polymerizable unsaturated group-containing organic compound may be used alone or in combination of two or more.
- the silica fine particles to which the silica sol and the radical polymerizable unsaturated group-containing organic compound are bonded may be each one kind or two kinds or more.
- silica sol may be used, or only silica fine particles combined with the radical polymerizable unsaturated group-containing organic compound may be used.
- the silica sol and the radical polymerizable unsaturated group-containing organic compound may be used. You may use together the silica fine particle which the compound couple
- the content of the component ( ⁇ ) of the coating composition is preferably selected according to the refractive index of the support sheet, but usually the content of silica derived from the component ( ⁇ ) of the coating layer is 20.
- the amount is preferably ⁇ 60% by mass.
- the content of silica is not less than the lower limit, the effect of reducing the refractive index of the coating layer and the effect of suppressing the occurrence of curling in the protective film-forming composite sheet are further enhanced.
- the said content of a silica is below the said upper limit, while the formation of a coating layer becomes easier, the effect which suppresses the fall of the hardness of a coating layer becomes higher.
- the content of silica derived from the component ( ⁇ ) of the coating layer because the refractive index of the coating layer, ease of formation and hardness, and curling generation suppression in the composite sheet for forming a protective film become better. Is more preferably 20 to 45% by mass.
- Component ( ⁇ ) is a main photocurable component that forms the coating layer.
- the polyfunctional acrylate monomer in the component ( ⁇ ) is not particularly limited as long as it is a (meth) acrylic acid derivative having two or more (meth) acryloyl groups in one molecule.
- Preferred examples of the polyfunctional acrylate monomer include 1,4-butanediol di (meth) acrylate, 1,6-hexanediol di (meth) acrylate, neopentyl glycol di (meth) acrylate, polyethylene glycol di ( (Meth) acrylate, hydroxypivalate neopentyl glycol di (meth) acrylate, dicyclopentanyl di (meth) acrylate, caprolactone modified dicyclopentenyl di (meth) acrylate, ethylene oxide modified di (meth) acrylate phosphoric acid, allylated cyclohexyl Di (meth) acrylate, isocyanurate di (meth) acrylate, trimethylolpropane tri
- the acrylate prepolymer in the component ( ⁇ ) is not particularly limited as long as it is a polymer or oligomer that is a (meth) acrylic ester and has photocurability.
- Preferred examples of the acrylate prepolymer include polyester acrylate prepolymer, epoxy acrylate prepolymer, urethane acrylate prepolymer, polyol acrylate prepolymer, and the like.
- polyester acrylate prepolymer for example, a hydroxyl group of a polyester oligomer having a hydroxyl group at both ends of a molecule obtained by a condensation reaction of a polyvalent carboxylic acid and a polyhydric alcohol is esterified with (meth) acrylic acid. And those obtained by esterifying a hydroxyl group at the terminal of an oligomer obtained by addition reaction of an alkylene oxide with a polyvalent carboxylic acid with (meth) acrylic acid.
- the epoxy acrylate prepolymer include those obtained by reacting an oxirane ring of a relatively low molecular weight bisphenol type epoxy resin or novolac type epoxy resin with (meth) acrylic acid for esterification. .
- urethane acrylate type prepolymer what is obtained by esterifying the polyurethane oligomer obtained by reaction of polyether polyol or polyester polyol, and polyisocyanate with (meth) acrylic acid is mentioned, for example.
- polyol acrylate type prepolymer what is obtained by esterifying the hydroxyl group of polyether polyol with (meth) acrylic acid is mentioned, for example.
- each of the multifunctional acrylate monomer and acrylate prepolymer may be one kind or two kinds or more.
- the component ( ⁇ ) only the polyfunctional acrylate monomer may be used, or only the acrylate prepolymer may be used, and the polyfunctional acrylate monomer and acrylate prepolymer are used in combination. Also good.
- the coating composition preferably further contains a solvent in addition to the component ( ⁇ ) and the component ( ⁇ ).
- a solvent as will be described later, the coating composition can be applied and dried to form a coating film for forming the coating layer more easily.
- the said solvent may be used individually by 1 type, and may use 2 or more types together.
- the solvent examples include aliphatic hydrocarbons such as hexane, heptane, and cyclohexane; aromatic hydrocarbons such as toluene and xylene; halogenated hydrocarbons such as methylene chloride and ethylene chloride; methanol, ethanol, propanol, butanol, 1 Alcohols such as methoxy-2-propanol; ketones such as acetone, methyl ethyl ketone, 2-pentanone, isophorone and cyclohexanone; esters such as ethyl acetate and butyl acetate; cellosolves such as 2-ethoxyethanol (ethyl cellosolve) and the like.
- aliphatic hydrocarbons such as hexane, heptane, and cyclohexane
- aromatic hydrocarbons such as toluene and xylene
- halogenated hydrocarbons such as methylene chloride and
- the coating composition has a monofunctional acrylate-based monomer, a photopolymerization initiator, a photosensitizer, a polymerization inhibitor, as long as the effects of the present invention are not impaired.
- Various optional components such as a crosslinking agent, an antioxidant, an ultraviolet absorber, a light stabilizer, a leveling agent, and an antifoaming agent may be contained.
- the said arbitrary component may be used individually by 1 type, and may use 2 or more types together.
- the monofunctional acrylate monomer as an optional component is a photocurable component and is not particularly limited as long as it is a (meth) acrylic acid derivative having only one (meth) acryloyl group in one molecule.
- Preferred examples of the monofunctional acrylate monomer include cyclohexyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, dodecyl (meth) acrylate (lauryl (meth) acrylate), and octadecyl (meth) acrylate.
- Steparyl (meth) acrylate) isobornyl (meth) acrylate and the like.
- Photopolymerization initiator As said photoinitiator as an arbitrary component, the well-known thing conventionally used with respect to radical polymerization is mentioned.
- Preferred examples of the photopolymerization initiator include acetophenone compounds, benzophenone compounds, alkylaminobenzophenone compounds, benzyl compounds, benzoin compounds, benzoin ether compounds, benzyldimethylacetal compounds, benzoylbenzoate compounds, ⁇ -Aryl ketone photopolymerization initiators such as acyloxime ester compounds; sulfur-containing photopolymerization initiators such as sulfide compounds and thioxanthone compounds; acylphosphine oxide compounds such as acyl diarylphosphine oxides; anthraquinone compounds Can be mentioned.
- acylphosphine oxide compounds such as acyl diarylphosphine oxides
- anthraquinone compounds Can be mentioned.
- a photoinitiator is unnecessary.
- the content of the photopolymerization initiator is preferably 0.2 to 10 parts by mass, and 0.5 to 7 parts by mass with respect to 100 parts by mass of the total content of the photocurable components. It is more preferable that
- the photosensitizer examples include tertiary amines, p-dimethylaminobenzoate, and thiol sensitizers.
- the content of the photosensitizer is preferably 1 to 20 parts by mass and preferably 2 to 10 parts by mass with respect to 100 parts by mass of the total content of the photocurable components. More preferred.
- the antioxidant, the ultraviolet absorber and the light stabilizer may be known ones, but may be a reactive antioxidant having a (meth) acryloyl group in the molecule, an ultraviolet absorber and a light stabilizer. preferable. These antioxidants, UV absorbers and light stabilizers bind to the polymer chain formed by irradiation with energy rays, so that dissipation from the cured layer over time is suppressed, and the functions of these components over a long period of time. Is demonstrated.
- the coating composition preferably contains a silica sol as the component ( ⁇ ), and more preferably contains a silica sol having an average particle size of silica fine particles suspended in a colloidal state of 0.03 to 0.05 ⁇ m. .
- a silica sol contains such a silica sol, the effect of suppressing blocking of the protective sheet-forming composite sheet is further enhanced.
- such a silica sol is present more and more unevenly on the surface on the side opposite to the support sheet side and in the vicinity thereof than in other regions, thereby forming the protective film.
- the effect of suppressing the blocking of the composite sheet is further increased.
- the coating conditions of the coating composition may be adjusted.
- the coating composition is, for example, by blending energy ray polymerizable compounds such as the component ( ⁇ ) and the component ( ⁇ ), and other components for constituting the coating composition, if necessary, other components. can get.
- a coating composition is obtained by the method similar to the case of the above-mentioned adhesive composition except the point from which a compounding component differs, for example.
- a solvent it may be used by mixing the solvent with any compounding component other than the solvent and diluting the compounding component in advance, or by diluting any compounding component other than the solvent in advance. You may use it by mixing a solvent with these compounding ingredients, without leaving.
- Components other than the solvent in the coating composition may be dissolved, or may be dispersed without dissolving.
- the concentration and viscosity of each component of the coating composition are not particularly limited as long as the coating composition can be applied.
- a protective film-forming composite sheet forms a protective film-forming film using the protective film-forming composition, and is coated with the coating composition.
- a layer can be formed, and a coating layer, a support sheet, and a protective film-forming film can be laminated in this order.
- the support sheet may be produced by laminating these layers.
- a pressure-sensitive adhesive layer may be formed using the pressure-sensitive adhesive composition.
- each layer (coating layer, support sheet, protective film forming film) constituting the protective film forming composite sheet is not particularly limited. Furthermore, the formation of each of these layers from the composition may be performed directly on the surface of the adjacent layer in the state of the protective sheet-forming composite sheet, or may be performed on this surface using a separate release film (release sheet). The formed layer may be bonded to the surface of the adjacent layer in the state of the protective film-forming composite sheet. However, when the surface (back surface) opposite to the surface (front surface) provided with the protective film-forming film of the support sheet is an uneven surface, it is between the coating layer and the uneven surface (back surface) of the support sheet. Furthermore, in order to suppress the formation of voids, the coating layer is preferably formed by directly applying the coating composition to the uneven surface of the support sheet.
- an example of the preferable manufacturing method of the composite sheet for protective film formation is demonstrated.
- the coating layer was formed as necessary by applying the coating composition to the uneven surface of the support sheet (in FIGS. 1 and 2, the back surface 10b of the support sheet 10, that is, the back surface 11b of the base material 11), and drying. It is preferably formed by curing the coating film.
- Coating of the coating composition on the target surface may be performed by a known method, for example, an air knife coater, blade coater, bar coater, gravure coater, roll coater, roll knife coater, curtain coater, die coater, knife coater. And a method using various coaters such as a screen coater, a Meyer bar coater, and a kiss coater.
- the coating composition When the coating composition is applied to the uneven surface of the support sheet, it is preferable to suppress the generation of voids between the coating layer and the uneven surface of the support sheet. By suppressing the generation of the voids, irregular reflection of light at the boundary between the coating layer and the uneven surface of the support sheet is suppressed, and laser printing can be performed more clearly on the surface of the protective film.
- a coating composition having a low viscosity In order to suppress the generation of the voids, for example, it is preferable to use a coating composition having a low viscosity.
- the coating composition containing an energy beam polymerizable compound is usually suitable for suppressing the generation of the voids.
- the drying conditions of the coating composition are not particularly limited, but the coating composition is preferably dried by heating. In this case, for example, it is preferably dried at 70 to 130 ° C. for 0.5 to 5 minutes.
- the curing conditions for the coating film formed from the coating composition are not particularly limited, and may be performed by a known method.
- a high pressure mercury lamp, a fusion H lamp, a xenon lamp or the like is used as the ultraviolet ray source, and the irradiation amount is preferably 100 to 500 mJ / cm. 2 may be irradiated.
- an electron beam is generated by an electron beam accelerator or the like, and the irradiation amount is preferably set to 150 to 350 kV.
- the coating layer is preferably formed by ultraviolet irradiation.
- the pressure-sensitive adhesive layer is the surface of the base material provided with the coating layer (the surface 11a of the base material 11 in FIGS. 1 and 2). It can be formed by directly coating the pressure-sensitive adhesive composition. However, usually, for example, a pressure-sensitive adhesive layer formed by applying a pressure-sensitive adhesive composition to a release-treated surface of a release sheet and drying it is bonded to the surface of a substrate, and the release sheet is removed. It is preferable to adopt a method in which a layer is formed separately and this is bonded to the surface of the substrate.
- the pressure-sensitive adhesive composition can be applied to the target surface in the same manner as in the case of the coating composition.
- the applied pressure-sensitive adhesive composition may be crosslinked by heating, and the crosslinking by heating may also be performed for drying.
- the heating conditions can be, for example, 100 to 130 ° C. for 1 to 5 minutes, but are not limited thereto.
- the support sheet is composed of one layer (single layer) such as a substrate only, or when the support sheet is composed of a plurality of layers, for example, a substrate and a pressure-sensitive adhesive layer are laminated.
- the composition for forming a protective film is directly applied to the surface of the support sheet provided with the coating layer (in FIGS. 1 and 2, the surface 10a of the support sheet 10, that is, the surface 12a of the pressure-sensitive adhesive layer 12). It is possible to form a protective film-forming film.
- the protective film-forming film formed by applying the protective film-forming composition to the release-treated surface of the release sheet and drying it is applied to the surface of the support sheet. It is preferable to adopt a method in which a protective film-forming film is separately formed and bonded to the surface of the support sheet, for example, such that the release sheet is removed if necessary.
- composition for forming a protective film can be applied to the target surface in the same manner as in the case of the coating composition.
- drying conditions of the composition for protective film formation are not specifically limited, It can be dried by the method similar to the case of a coating composition.
- the protective film-forming composite sheet according to this embodiment can be produced by methods other than those described above.
- a pressure-sensitive adhesive layer is formed using the pressure-sensitive adhesive composition
- a protective film-forming film is formed using the protective film-forming composition
- the pressure-sensitive adhesive layer and the protective film-forming film are overlapped.
- the surface of the base material (in FIGS. 1 and 2) provided with a coating layer on the surface of the pressure-sensitive adhesive layer of the laminated body (the surface on which the protective film-forming film of the pressure-sensitive adhesive layer is not provided).
- a composite sheet for forming a protective film can also be produced by laminating the surface 11a) of the substrate 11. In this case, the conditions for forming the pressure-sensitive adhesive layer and the protective film-forming film are the same as in the above-described method.
- the protective film forming composite sheet according to the present embodiment is It can also be manufactured by methods other than those described above.
- a coating layer is formed using the coating composition, and this is laminated to a smooth surface of a support sheet to form a laminate, while a protective film-forming film is formed using the protective film-forming composition.
- the composite sheet for forming a protective film can also be produced by forming and bonding this protective film-forming film to the exposed surface of the support sheet of the laminate (the surface on which the coating layer of the support sheet is not provided). .
- the order of laminating the coating layer and the protective film forming film separately formed on the support sheet may be opposite to the above, and after supporting the protective film forming film on one surface of the support sheet,
- the composite sheet for forming a protective film can also be produced by attaching a coating layer to the other surface of the sheet (the surface on which the protective film-forming film of the support sheet is not provided). Further, a protective film-forming film is formed on one surface of the support sheet using the protective film-forming composition, and on the other hand, a coating layer is formed using the coating composition.
- a composite sheet for forming a protective film can also be produced by adhering to the exposed surface of the support sheet (the surface on which the protective film-forming film is not provided). The formation conditions of the coating layer and the protective film-forming film in these cases are the same as in the above-described method.
- a protective film-forming film previously cut into a predetermined size and shape may be provided on the pressure-sensitive adhesive layer.
- a method for using the protective film forming composite sheet according to the present embodiment is, for example, as shown below.
- the usage method of the composite sheet for protective film formation in case the film for protective film formation is thermosetting is demonstrated.
- the back surface of the semiconductor wafer is attached to the protective film forming film of the protective film forming composite sheet, and the protective film forming composite sheet is fixed to the dicing apparatus.
- the protective film-forming film is cured by heating to form a protective film.
- the protective film is usually formed after removing the back grind tape from the semiconductor wafer.
- the semiconductor wafer is diced into semiconductor chips.
- printing can be performed on the surface of the protective film by irradiating the protective film with laser light from the coating layer side of the protective film-forming composite sheet.
- the protective film In contrast, laser printing can be performed clearly.
- the condition may be checked. For example, in the case of a semiconductor chip, the presence or absence of breakage such as chipping or cracking may be inspected.
- the gloss value of the surface (back surface) opposite to the side in contact with the support sheet of the coating layer is as described above. Within a specific range, the generation of voids is suppressed between the coating layer and the back surface of the support sheet. Therefore, when a semiconductor wafer or a semiconductor chip is observed from the coating layer side through the protective film forming composite sheet with an infrared camera or the like, a clear inspection image can be obtained, so that the inspection can be performed with high accuracy. .
- the semiconductor chip is peeled off from the support sheet together with the protective film affixed to the back surface thereof and picked up to obtain a semiconductor chip with a protective film.
- the support sheet is formed by laminating a base material and an adhesive layer, and the adhesive layer is energy ray curable, the adhesive layer is cured by irradiation of energy rays, A semiconductor chip with a protective film can be more easily obtained by picking up the semiconductor chip from the adhesive layer together with the protective film attached to the back surface thereof.
- the back surface of the semiconductor wafer is attached to the protective film forming film 13 of the protective film forming composite sheet 1 and the exposed support sheet 10 is exposed.
- Adhesive layer 12 is affixed to a dicing jig (not shown) such as a ring frame to fix the protective film-forming composite sheet 1 to the dicing apparatus.
- a dicing jig such as a ring frame
- laser printing is performed on the protective film, then dicing is performed, and energy beam irradiation is applied to the jig of the adhesive layer 12 as necessary.
- a semiconductor chip with a protective film may be picked up.
- the composite sheet 1 for forming a protective film in which the pressure-sensitive adhesive layer 12 is energy ray curable the pressure-sensitive adhesive layer 12 is specified so that it does not peel off from the jig. It is necessary to adjust so that the region does not cure.
- the composite sheet 1 for forming a protective film there is no need to separately provide a configuration for attaching the composite sheet 1 to the jig.
- the back surface of the semiconductor wafer is attached to the protective film forming film 23 of the protective film forming composite sheet 2 and the jig bonding is performed.
- the agent layer 16 is attached to a dicing jig (not shown) such as a ring frame, and the protective film forming composite sheet 2 is fixed to a dicing apparatus.
- the protective film-forming film 23 is cured to form a protective film
- laser printing is performed on the protective film, then dicing is performed, and if necessary, the adhesive layer 12 is cured by irradiation with energy rays, A semiconductor chip with a protective film may be picked up.
- the adhesive layer 12 is different from the case where the protective film-forming composite sheet 1 is used. It is not necessary to adjust so as not to cure the specific region.
- the protective film-forming composite sheet 2 is required to have a jig adhesive layer 16. By having the adhesive layer 16 for jig
- the back surface of the semiconductor wafer is attached to the protective film forming film of the protective film forming composite sheet, and the protective film is formed. Fix the composite sheet to the dicing machine.
- the protective film-forming film is cured by irradiation with energy rays to form a protective film.
- the protective film is usually formed after removing the back grind tape from the semiconductor wafer.
- the semiconductor wafer is diced into semiconductor chips.
- printing can be performed on the surface of the protective film by irradiating the protective film with laser light from the coating layer side of the protective film-forming composite sheet. From this printing to dicing, it can be carried out in the same manner as the above-mentioned film for forming a protective film is thermosetting, and in that case, laser printing can be clearly performed on the protective film, Inspection can be performed with high accuracy by an infrared camera or the like.
- the semiconductor chip is peeled off from the support sheet together with the protective film stuck on the back surface thereof and picked up, thereby obtaining a semiconductor chip with a protective film.
- This method is particularly suitable when, for example, a composite sheet for forming a protective film is used in which a support sheet is formed by laminating a base material and a pressure-sensitive adhesive layer, and the pressure-sensitive adhesive layer is non-energy ray curable. It is.
- the protective film-forming film is cured by irradiation with energy rays and then the semiconductor wafer is diced and a semiconductor chip with a protective film is picked up is described.
- the adhesive layer is a non-energy ray.
- the protective film-forming film can be cured by irradiation with energy rays at any stage until the semiconductor chip is picked up.
- a method described below is preferable. That is, first, as in the above case, the back surface of the semiconductor wafer is attached to the protective film forming film of the protective film forming composite sheet, and the protective film forming composite sheet is fixed to the dicing apparatus. Next, the protective film is irradiated with laser light from the coating layer side of the protective film-forming composite sheet, printing is performed on the surface of the protective film, and the semiconductor wafer is diced into semiconductor chips.
- the protective film-forming film is cured to form a protective film, and the adhesive layer is cured, and from this cured adhesive layer, the semiconductor chip is adhered to the back surface thereof By picking up with the film, a semiconductor chip with a protective film is obtained.
- the protective film when winding up a long protective film-forming composite sheet, the protective film usually has a release film (release film 15 in FIGS. 1 and 2) laminated on the exposed surface of the protective film-forming film.
- a film-forming composite sheet is used.
- the protective film-forming composite sheet according to the present embodiment has any configuration (for example, any one of the protective film-forming composite sheet 1 shown in FIG. 1 and the protective film-forming composite sheet 2 shown in FIG. 2).
- the lamination unit in which the coating layer, the support sheet, the protective film-forming film, and the release film are laminated in this order is in the radial direction of the roll. They are stacked one after another.
- the surface of the release film of one laminated unit (the surface opposite to the side on which the protective film-forming film is provided)
- the back surface of the coating layer of the other laminated unit (the surface opposite to the side in contact with the base material) is in contact and pressed, and in this state, the roll of the protective film-forming composite sheet is Saved.
- the provision of the coating layer suppresses the sticking of the release film and the coating layer between the laminated units, so that the protective film-forming composite sheet according to this embodiment suppresses blocking. Is done.
- the peel strength of the release film measured by the following method is preferably 10 mN / 50 mm or less, more preferably 7. 5 mN / 50 mm or less, particularly preferably 5 mN / 50 mm or less.
- the composite sheet for forming a protective film according to this embodiment having a width of 50 mm and a length of 100 mm in a state in which a release film is provided on the protective film-forming film is formed so that the coating layers are all directed in the same direction.
- a laminate in which the first outermost layer is a coating layer and the second outermost layer is a release film is formed.
- the composite sheet was left to stand at 40 ° C. for 3 days with a force (external force) of 980.665 mN (that is, 100 gf) applied in the laminating direction of the composite sheet, and then peeled closest to the first outermost coating layer in the laminating direction Adjacent coating layers (on the first outermost coating layer in the stacking direction) under the conditions of a peeling speed of 300 mm / min and a peeling angle of 180 ° The peel force when peeled from the nearest coating layer is measured.
- all the composite sheets for forming a protective film to be stacked are assumed to have the same configuration. Moreover, it is preferable that the number of the protective sheet-forming composite sheets to be stacked is ten. From the peeling force of such a peeling film, the height of the blocking suppression effect (blocking resistance) of the composite sheet for protective film formation concerning this embodiment can be confirmed.
- Example 1 A composite sheet for forming a protective film having the structure shown in FIG. 1 was produced. A plan view of this protective film-forming composite sheet is shown in FIG. More specifically, it is as follows.
- thermosetting protective film Preparation of composition for forming thermosetting protective film
- the following components were blended in the following amounts (solid content), and methyl ethyl ketone was blended to obtain a protective film-forming composition (III-1) having a solid content concentration of 51% by mass.
- the protective film-forming composition (III-1) obtained above was applied onto the release-treated surface of the first release film (“SP-P502010 *” manufactured by Lintec Corporation, thickness 50 ⁇ m). And dried at 120 ° C. for 2 minutes to form a protective film-forming film (thickness: 25 ⁇ m).
- the release treatment surface of the second release film (“SP-PET381031C” manufactured by Lintec Corporation, thickness 38 ⁇ m) is provided.
- this laminated body By sticking together, the elongate laminated body by which the 1st peeling film, the film for protective film formation, and the 2nd peeling film were laminated
- this cut laminated body in the width direction center part, it draws a circle with a diameter of 220 mm in plan view from the second release film side to the second release film and the protective film forming film.
- a half cut was made to make a cut.
- the “plan view” of the stacked body means that the stacked body is looked down from above in the stacking direction.
- the second release film and the protective film-forming film are removed from the laminate so as to leave only the circular portion formed by the half cut, and on the release treatment surface of the first release film, As a result, a first laminated body in which a circular protective film-forming film and a second release film were laminated in this order was obtained.
- the circular protective film-forming film in the first laminate corresponds to the circular protective film-forming film 13 having a diameter d1 of 220 mm in the protective film-forming composite sheet 1 shown in FIG.
- Preparation of coating composition 150 parts by mass of a silica sol dispersed in 2-ethoxyethanol (ethyl cellosolve) (catalyst chemical industry “OSCAL 1632”, silica sol particle size 30 to 50 nm, solid content concentration 30% by mass), urethane acrylate and A hard coating agent composed of a polyfunctional acrylate monomer ("Arakawa Chemical Industries” Beam Set 575CB ", solid content concentration 100% by weight, containing a photopolymerization initiator) 100 parts by weight, and coating composition (solid content concentration 30% by mass) was obtained.
- a silica sol dispersed in 2-ethoxyethanol (ethyl cellosolve) catalyst chemical industry “OSCAL 1632”, silica sol particle size 30 to 50 nm, solid content concentration 30% by mass
- urethane acrylate and A hard coating agent composed of a polyfunctional acrylate monomer (“Arakawa Chemical Industries” Beam Set 575CB ", solid content concentration 100% by weight,
- (Preparation of adhesive composition) 100 parts by weight of (meth) acrylic acid alkyl ester copolymer and 10 parts by weight (solid content) of aromatic polyisocyanate compound (crosslinking agent, “Takenate D110N” manufactured by Mitsui Chemicals) are blended, and methyl ethyl ketone is further blended. Thus, a pressure-sensitive adhesive composition (iii) having a solid content concentration of 30% by mass was obtained.
- the (meth) acrylic acid alkyl ester copolymer is obtained by copolymerizing 40 parts by mass of n-butyl acrylate, 55 parts by mass of 2-ethylhexyl acrylate, and 5 parts by mass of 2-hydroxyethyl acrylate. 600,000 acrylic resin.
- a knife coater is applied to the release-treated surface of a third release film (“SP-PET381031C” manufactured by Lintec Corporation) made of a polyethylene terephthalate film having a thickness of 38 ⁇ m, one side of which is released by forming a silicone-based release agent layer.
- SP-PET381031C manufactured by Lintec Corporation
- the pressure-sensitive adhesive composition (iii) obtained above was applied and dried to form a pressure-sensitive adhesive layer (thickness 5 ⁇ m).
- the surface of the above-mentioned base material on which the coating layer is formed is subjected to corona treatment on the surface opposite to the concavo-convex surface, and then the above-mentioned pressure-sensitive adhesive layer is bonded to this corona-treated surface to form a coating layer, base material, and adhesive.
- the agent layer and the third release film were laminated in this order to obtain a long second laminate including a support sheet.
- the second laminated body is arranged in the width direction (the width direction indicated by reference sign w1 of the protective film-forming composite sheet 1 shown in FIG. 3). Was cut by a size of 300 mm.
- the 2nd peeling film was removed from the 1st laminated body obtained above, and the circular film for protective film formation was exposed. Moreover, the 3rd peeling film was removed from the 2nd laminated body obtained above, and the adhesive layer was exposed. Then, by bonding the exposed surface of the protective film forming film to the exposed surface of the adhesive layer, the coating layer, the base material, the adhesive layer, the protective film forming film, and the first release film are in this order. A third laminated body corresponding to the composite sheet for forming a protective film was obtained.
- a half cut is performed on the third laminate obtained above from the coating layer side so as to draw a circle having a diameter of 270 mm in a plan view on all of the coating layer, the base material and the adhesive layer. It was.
- the coating layer, the base material, and the pressure-sensitive adhesive layer are formed so that the circle having a diameter of 270 mm is concentric with the circle having a diameter of 220 mm formed by the protective film-forming film in plan view. Cut everything into cuts.
- the width of the third laminate in the protective sheet-forming composite sheet 1 shown in FIG. 3 of the composite sheet 1 shown in FIG. 3 is 20 mm away from the circle having a diameter of 270 mm.
- the above-described half cut that draws two concentric circles and a pair of arcs is made in the longitudinal direction of the third laminated body (in the width direction indicated by the symbol w1 of the protective film-forming composite sheet 1 shown in FIG. 3).
- the coating layer, the base material, and the adhesive are formed from the coating layer side so as to draw two straight lines that connect the arcs in the longitudinal direction between adjacent portions in plan view.
- a half cut was made to cut all the agent layer.
- the notches corresponding to the two straight lines form a planar peripheral edge of the pressure-sensitive adhesive layer indicated by reference numeral 122 in the protective film-forming composite sheet 1 shown in FIG.
- the composite sheet for forming a protective film shown in FIGS. 1 and 3 was obtained.
- the circular pressure-sensitive adhesive layer (support sheet) in this protective film-forming composite sheet corresponds to the circular pressure-sensitive adhesive layer 12 (support sheet 10) having a diameter d2 of 270 mm in FIG.
- the 1st peeling film in this composite sheet for protective film formation corresponds to the peeling film 15 in FIG.
- Example 2 As shown in Table 1, a composite sheet for forming a protective film was obtained in the same manner as in Example 1 except that a substrate having a surface roughness Ra of the uneven surface of 1 ⁇ m instead of 0.4 ⁇ m was used.
- Example 3 As shown in Table 1, the same as Example 1, except that a substrate having a surface roughness Ra of 1 ⁇ m instead of 0.4 ⁇ m was used, and the thickness of the coating layer was changed to 1 ⁇ m instead of 3 ⁇ m. By the method, a composite sheet for forming a protective film was obtained.
- Example 4 As shown in Table 1, a composite sheet for forming a protective film was obtained in the same manner as in Example 1 except that the thickness of the coating layer was changed to 1 ⁇ m instead of 3 ⁇ m.
- Example 5 As shown in Table 1, the same as Example 1 except that a substrate having a surface roughness Ra of 1 ⁇ m instead of 0.4 ⁇ m was used and the thickness of the coating layer was changed to 6 ⁇ m instead of 3 ⁇ m. By the method, a composite sheet for forming a protective film was obtained.
- Example 6 As shown in Table 1, the same as Example 1 except that a substrate having a surface roughness Ra of 3 ⁇ m instead of 0.4 ⁇ m was used, and the thickness of the coating layer was changed to 6 ⁇ m instead of 3 ⁇ m. By the method, a composite sheet for forming a protective film was obtained.
- Example 1 As shown in Table 1, a protective film was formed in the same manner as in Example 1 except that a substrate having a surface roughness Ra of 1 ⁇ m instead of 0.4 ⁇ m was used and a coating layer was not formed. A composite sheet was obtained.
- Example 2 As shown in Table 1, the base material was arranged so that the uneven surface faced to the opposite side, that is, the pressure-sensitive adhesive layer side (inner side), and the coating layer was not formed (that is, the conventional configuration shown in FIG. Except for the points, a composite sheet for forming a protective film was obtained in the same manner as in Example 1.
- Example 3 As shown in Table 1, a substrate having a surface roughness Ra of 1 ⁇ m instead of 0.4 ⁇ m is used, and this substrate is placed so that the surface of the uneven surface faces the opposite side, that is, the pressure-sensitive adhesive layer side (inner side). A composite sheet for forming a protective film was obtained in the same manner as in Example 1 except that the coating layer was not formed (that is, the conventional configuration shown in FIG. 5).
- Pattern 1 Character size 0.4 mm x 0.5 mm, character spacing 0.3 mm, number of characters
- Pattern 2 Character size 0.2 mm x 0.5 mm, character spacing 0.3 mm, number of characters 20
- the test piece is sandwiched between two glass plates (width 75 mm, length 15 mm, thickness 5 mm), and the entire laminate of the glass plate and the test piece is placed at a predetermined position with one glass plate as the lowermost layer.
- the test piece was pressurized by placing a weight on the other uppermost glass plate.
- the force applied to the test piece in the laminating direction of the tape was 980.665 mN (that is, 100 gf).
- the entire laminate of the glass plate and the test piece was stored at 40 ° C. for 3 days in a moist heat accelerator (manufactured by ESPEC), and a heating and pressing acceleration test was performed on the test piece.
- the test piece was taken out from the moist heat accelerator, and the lowermost first release film (the first release film in contact with the lowermost glass plate) and the protective film forming film adjacent thereto were removed and exposed.
- the pressure-sensitive adhesive layer By sticking the pressure-sensitive adhesive layer to the support plate via a double-sided pressure-sensitive adhesive tape, only the lowermost first release film and the protective film-forming film adjacent thereto are removed from the test piece after the heat and pressure acceleration test. was fixed to the support plate.
- the peeling force of the 1st peeling film to be measured is sufficiently small, from the said test piece taken out from the moist heat accelerator, the lowermost 1st peeling film (lowermost glass plate and When trying to remove the protective film-forming film adjacent to the first release film that was in contact with the first release film, the first release film to be measured for the peel force was first removed from the adjacent layer (of Examples 1 to 5).
- the coating layer may peel off from the coating layer, and in the case of Comparative Examples 1 to 3, the base material may peel off.
- the surface roughness Ra of the surface on the substrate side is a contact-type surface.
- the cut-off value ⁇ c was 0.8 mm
- the evaluation length Ln was 4 mm
- the measurement was performed according to JIS B0601: 2001.
- Table 1 for the protective film-forming composite sheets of Comparative Examples 1 to 3, as the surface roughness Ra of the substrate-side outermost surface, the surface roughness of the surface opposite to the pressure-sensitive adhesive layer side of the substrate described above Ra is described.
- the composite sheet for forming a protective film of Examples 1 to 6 has a coating layer on the outermost layer on the substrate side, and the gloss value of the surface of this coating layer is within a specific range, so that laser printability is achieved. In addition, the blocking resistance was good.
- the protective film-forming composite sheets of Examples 1, 2, 4, and 5 were superior in laser printability to the protective film-forming composite sheets of Examples 3 and 6, In the composite sheets for protective film formation of 4 and 5, it is presumed that the gloss value on the surface of the coating layer is slightly large and is in a more suitable range.
- the protective film-forming composite sheets of Examples 1 to 4 are superior in blocking resistance to the protective film-forming composite sheets of Examples 5 and 6, and this is because the protective film-forming composite sheets of Examples 1 to 4 are formed. It is estimated that the composite sheet for use is because the thickness of the coating layer is thinner. In each of the protective film-forming composite sheets of Examples 1 to 6, no void was observed between the substrate and the pressure-sensitive adhesive layer.
- the protective film-forming composite sheet of Comparative Example 1 has a surface (back surface) opposite to the surface (front surface) on the side having the adhesive layer of the base material, as shown in FIG. ) Is an uneven surface and does not have a coating layer, it was excellent in blocking resistance but inferior in laser printability.
- the surface (back surface) opposite to the surface (front surface) provided with the pressure-sensitive adhesive layer of the base material is a smooth surface, as shown in FIG.
- the protective sheet-forming composite sheet of Comparative Example 3 also had the same configuration as the protective film-forming composite sheet of Comparative Example 2, but was inferior not only in blocking resistance but also in laser printability. This is presumed to be because the surface (surface) on the side having the pressure-sensitive adhesive layer of the base material is an uneven surface and the surface roughness Ra is larger than that of the protective sheet-forming composite sheet of Comparative Example 2. Is done.
- Comparative Example 3 since the surface roughness Ra of the uneven surface is large, the shape of the uneven surface is reflected also on the surface of the protective film, and the degree of unevenness on the surface of the protective film is higher than in the case of Comparative Example 2. It is presumed that the larger the light, the greater the irregular reflection of light and the lower the laser printability. Furthermore, the protective sheet-forming composite sheets of Comparative Examples 2 and 3 both had voids between the uneven surface of the substrate and the pressure-sensitive adhesive layer, but Comparative Example 3 was more uneven than Comparative Example 2. Since the surface roughness Ra of the surface is large, the gap portion is large. Therefore, it is presumed that the comparative example 3 has a larger light irregular reflection than the comparative example 2 and the laser printability is inferior.
- the protective film-forming composite sheet of Comparative Example 4 is the same surface as the protective film-forming composite sheet of Example 1 (surface) opposite to the surface (front surface) provided with the pressure-sensitive adhesive layer. ) Is an uneven surface and has a coating layer, which is excellent in blocking resistance but inferior in laser printability. This is presumably because the protective sheet-forming composite sheet of Comparative Example 4 has a low gloss value on the surface of the coating layer and is not within a suitable range.
- the present invention can be used for manufacturing a semiconductor chip or the like whose back surface is protected by a protective film.
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- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Adhesive Tapes (AREA)
- Dicing (AREA)
- Laminated Bodies (AREA)
- Paints Or Removers (AREA)
Abstract
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020187025052A KR20180120173A (ko) | 2016-03-04 | 2017-02-10 | 보호막 형성용 복합 시트 |
CN202311427176.0A CN117656639A (zh) | 2016-03-04 | 2017-02-10 | 保护膜形成用复合片 |
JP2018503001A JP6818009B2 (ja) | 2016-03-04 | 2017-02-10 | 保護膜形成用複合シート |
SG11201807452UA SG11201807452UA (en) | 2016-03-04 | 2017-02-10 | Protective film-forming composite sheet |
CN201780014253.6A CN108778722A (zh) | 2016-03-04 | 2017-02-10 | 保护膜形成用复合片 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016042690 | 2016-03-04 | ||
JP2016-042690 | 2016-03-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017150145A1 true WO2017150145A1 (fr) | 2017-09-08 |
Family
ID=59742786
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2017/004927 WO2017150145A1 (fr) | 2016-03-04 | 2017-02-10 | Feuille composite pour formation de membrane protectrice |
Country Status (6)
Country | Link |
---|---|
JP (1) | JP6818009B2 (fr) |
KR (1) | KR20180120173A (fr) |
CN (2) | CN108778722A (fr) |
SG (1) | SG11201807452UA (fr) |
TW (1) | TWI764885B (fr) |
WO (1) | WO2017150145A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020116284A1 (fr) * | 2018-12-05 | 2020-06-11 | リンテック株式会社 | Feuille composite de formation de film de protection et procédé de fabrication d'une puce semi-conductrice |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2022210690A1 (fr) * | 2021-03-31 | 2022-10-06 | 積水ポリマテック株式会社 | Composition filmogène, film, feuille de circuit et feuille de capteur |
Citations (13)
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US20040071994A1 (en) * | 2001-02-26 | 2004-04-15 | Detlef Busch | Laser-markable laminate |
JP2007123404A (ja) * | 2005-10-26 | 2007-05-17 | Furukawa Electric Co Ltd:The | ダイシングテープ、および半導体ウェハダイシング方法 |
WO2008038345A1 (fr) * | 2006-09-27 | 2008-04-03 | Fujitsu Microelectronics Limited | Procédé de fabrication d'un dispositif à semi-conducteur |
JP2012015236A (ja) * | 2010-06-30 | 2012-01-19 | Furukawa Electric Co Ltd:The | ウエハ貼着用粘着シートおよびそれを用いたウエハの加工方法 |
JP2012033741A (ja) * | 2010-07-30 | 2012-02-16 | Nitto Denko Corp | ダイシングテープ一体型半導体裏面用フィルム及びその製造方法並びに半導体装置の製造方法 |
WO2014054781A1 (fr) * | 2012-10-05 | 2014-04-10 | リンテック株式会社 | Feuille de découpage en dés dotée d'une couche de formation de film de protection et procédé de fabrication de puce |
JP2014063802A (ja) * | 2012-09-20 | 2014-04-10 | Lintec Corp | レーザーダイシングシート−剥離シート積層体、レーザーダイシングシートおよびチップ体の製造方法 |
JP2014075560A (ja) * | 2012-10-05 | 2014-04-24 | Lintec Corp | 表面保護シート |
WO2014155756A1 (fr) * | 2013-03-26 | 2014-10-02 | リンテック株式会社 | Feuille adhesive, feuille composite pour former un film de protection et procede de fabrication d'une puce ayant un film de protection |
WO2015015817A1 (fr) * | 2013-07-31 | 2015-02-05 | リンテック株式会社 | Pellicule formant une pellicule protectrice, feuille pour la formation d'une pellicule protectrice et procédé d'inspection |
WO2015146936A1 (fr) * | 2014-03-24 | 2015-10-01 | リンテック株式会社 | Pellicule formant une membrane de protection, feuille d'utilisation formant une membrane de protection, procédé de production et procédé d'inspection pour pièce à usiner ou produit transformé, pièce à usiner déterminée comme étant un produit adéquat et produit transformé déterminé comme étant un produit adéquat |
JP2015183169A (ja) * | 2014-03-26 | 2015-10-22 | リンテック株式会社 | 粘着シート |
JP5823591B1 (ja) * | 2014-10-01 | 2015-11-25 | 古河電気工業株式会社 | 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 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
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WO2014148496A1 (fr) * | 2013-03-19 | 2014-09-25 | リンテック株式会社 | Film destiné à former un film de protection |
-
2017
- 2017-02-10 SG SG11201807452UA patent/SG11201807452UA/en unknown
- 2017-02-10 WO PCT/JP2017/004927 patent/WO2017150145A1/fr active Application Filing
- 2017-02-10 CN CN201780014253.6A patent/CN108778722A/zh active Pending
- 2017-02-10 JP JP2018503001A patent/JP6818009B2/ja active Active
- 2017-02-10 KR KR1020187025052A patent/KR20180120173A/ko not_active Application Discontinuation
- 2017-02-10 CN CN202311427176.0A patent/CN117656639A/zh active Pending
- 2017-02-15 TW TW106104893A patent/TWI764885B/zh active
Patent Citations (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20040071994A1 (en) * | 2001-02-26 | 2004-04-15 | Detlef Busch | Laser-markable laminate |
JP2007123404A (ja) * | 2005-10-26 | 2007-05-17 | Furukawa Electric Co Ltd:The | ダイシングテープ、および半導体ウェハダイシング方法 |
WO2008038345A1 (fr) * | 2006-09-27 | 2008-04-03 | Fujitsu Microelectronics Limited | Procédé de fabrication d'un dispositif à semi-conducteur |
JP2012015236A (ja) * | 2010-06-30 | 2012-01-19 | Furukawa Electric Co Ltd:The | ウエハ貼着用粘着シートおよびそれを用いたウエハの加工方法 |
JP2012033741A (ja) * | 2010-07-30 | 2012-02-16 | Nitto Denko Corp | ダイシングテープ一体型半導体裏面用フィルム及びその製造方法並びに半導体装置の製造方法 |
JP2014063802A (ja) * | 2012-09-20 | 2014-04-10 | Lintec Corp | レーザーダイシングシート−剥離シート積層体、レーザーダイシングシートおよびチップ体の製造方法 |
WO2014054781A1 (fr) * | 2012-10-05 | 2014-04-10 | リンテック株式会社 | Feuille de découpage en dés dotée d'une couche de formation de film de protection et procédé de fabrication de puce |
JP2014075560A (ja) * | 2012-10-05 | 2014-04-24 | Lintec Corp | 表面保護シート |
WO2014155756A1 (fr) * | 2013-03-26 | 2014-10-02 | リンテック株式会社 | Feuille adhesive, feuille composite pour former un film de protection et procede de fabrication d'une puce ayant un film de protection |
WO2015015817A1 (fr) * | 2013-07-31 | 2015-02-05 | リンテック株式会社 | Pellicule formant une pellicule protectrice, feuille pour la formation d'une pellicule protectrice et procédé d'inspection |
WO2015146936A1 (fr) * | 2014-03-24 | 2015-10-01 | リンテック株式会社 | Pellicule formant une membrane de protection, feuille d'utilisation formant une membrane de protection, procédé de production et procédé d'inspection pour pièce à usiner ou produit transformé, pièce à usiner déterminée comme étant un produit adéquat et produit transformé déterminé comme étant un produit adéquat |
JP2015183169A (ja) * | 2014-03-26 | 2015-10-22 | リンテック株式会社 | 粘着シート |
JP5823591B1 (ja) * | 2014-10-01 | 2015-11-25 | 古河電気工業株式会社 | 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 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2020116284A1 (fr) * | 2018-12-05 | 2020-06-11 | リンテック株式会社 | Feuille composite de formation de film de protection et procédé de fabrication d'une puce semi-conductrice |
JPWO2020116284A1 (ja) * | 2018-12-05 | 2021-10-21 | リンテック株式会社 | 保護膜形成用複合シート、及び半導体チップの製造方法 |
JP7516256B2 (ja) | 2018-12-05 | 2024-07-16 | リンテック株式会社 | 保護膜形成用複合シート、及び半導体チップの製造方法 |
Also Published As
Publication number | Publication date |
---|---|
TWI764885B (zh) | 2022-05-21 |
KR20180120173A (ko) | 2018-11-05 |
CN108778722A (zh) | 2018-11-09 |
JPWO2017150145A1 (ja) | 2018-12-27 |
SG11201807452UA (en) | 2018-09-27 |
CN117656639A (zh) | 2024-03-08 |
JP6818009B2 (ja) | 2021-01-20 |
TW201801916A (zh) | 2018-01-16 |
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