WO2021095370A1 - ダイシング・ダイボンディング一体型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 - Google Patents
ダイシング・ダイボンディング一体型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 Download PDFInfo
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- WO2021095370A1 WO2021095370A1 PCT/JP2020/036047 JP2020036047W WO2021095370A1 WO 2021095370 A1 WO2021095370 A1 WO 2021095370A1 JP 2020036047 W JP2020036047 W JP 2020036047W WO 2021095370 A1 WO2021095370 A1 WO 2021095370A1
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- adhesive layer
- dicing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/04—Non-macromolecular additives inorganic
-
- 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
- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
- C09J11/02—Non-macromolecular additives
- C09J11/06—Non-macromolecular additives organic
-
- 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
- C09J175/00—Adhesives based on polyureas or polyurethanes; 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
- C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
- C09J7/38—Pressure-sensitive adhesives [PSA]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P54/00—Cutting or separating of wafers, substrates or parts of devices
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/70—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping
- H10P72/74—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using temporarily an auxiliary support
- H10P72/7402—Wafer tapes, e.g. grinding or dicing support tapes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/70—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping
- H10P72/74—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using temporarily an auxiliary support
- H10P72/7412—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using temporarily an auxiliary support the auxiliary support including means facilitating the separation of a device or wafer from the auxiliary support
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P72/00—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof
- H10P72/70—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping
- H10P72/74—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using temporarily an auxiliary support
- H10P72/7416—Handling or holding of wafers, substrates or devices during manufacture or treatment thereof for supporting or gripping using temporarily an auxiliary support used during dicing or grinding
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W72/00—Interconnections or connectors in packages
- H10W72/071—Connecting or disconnecting
Definitions
- the present disclosure relates to a dicing / die bonding integrated film and a manufacturing method thereof, and a manufacturing method of a semiconductor device.
- a dicing step is carried out in which an adhesive film for dicing is attached to the wafer and the wafer is fragmented into chips in that state.
- an expanding step, a picking step, a mounting step, a die bonding step and the like are carried out.
- a film called a dicing / die bonding integrated film is used in the manufacturing process of semiconductor devices.
- This film has a structure in which a base material layer, an adhesive layer, and an adhesive layer are laminated in this order, and is used, for example, as follows.
- the surface on the adhesive layer side is attached to the wafer, and the wafer is diced with the wafer fixed by the dicing ring. As a result, the wafer is fragmented into a plurality of chips.
- the adhesive layer is weakened by irradiating the adhesive layer with active energy rays to weaken the adhesive force of the adhesive layer against the adhesive layer, and then the adhesive is attached to the chip together with the adhesive piece in which the adhesive layer is individualized. Pick up from the layer.
- the semiconductor device is manufactured through a step of mounting the chip on a substrate or the like via an adhesive piece.
- a laminate composed of a chip obtained through a dicing step and an adhesive piece attached to the chip is called DAF (Die Attach Film).
- the pressure-sensitive adhesive layer (dying film) whose adhesive strength is weakened by irradiation with active energy rays is called an active energy ray-curable type.
- a pressure-sensitive adhesive layer in which the adhesive strength remains constant without being irradiated with active energy rays in the manufacturing process of a semiconductor device is called a pressure-sensitive type.
- the dicing / die bonding integrated film provided with the pressure-sensitive adhesive layer does not require a process of irradiating active energy rays for the user (mainly a semiconductor device manufacturer), and does not require equipment for this purpose. There is a merit that there is.
- Patent Document 1 can be said to be an active energy ray-curable type in that the pressure-sensitive adhesive layer contains a component that is cured by active energy rays, while only a predetermined portion of the pressure-sensitive adhesive layer is preliminarily irradiated with active energy rays. Therefore, a dicing / die bonding integrated film that can be said to be pressure-sensitive in that the user does not need to irradiate active energy rays in the manufacturing process of the semiconductor device is disclosed.
- a scribe line between chips it is necessary to set a region called a scribe line between chips because it is cut by a blade in the dicing process, and the scribe line is narrowed. It has been demanded.
- the dicing step is carried out using a blade that rotates at high speed. Therefore, in order to narrow the scribe line, it is necessary to use a blade having a narrow width.
- a narrow blade for example, a blade having a width of about 10 to 50 ⁇ m
- this distance may be referred to as “calf (groove) width”.
- double dicing a phenomenon in which two or more chips are picked up at the same time (hereinafter, this phenomenon may be referred to as “double dicing”) may occur.
- double dies the production efficiency decreases as a result.
- the expanding step carried out following the dicing step is a step of pulling the separated chips apart in order to expand the width of the calf.
- the number of calf lines to be separated increases and the effect of the expanding process is dispersed, so that the effect is limited.
- the present disclosure has been made in view of the above circumstances, and a dicing / die bonding integrated film capable of ensuring a sufficient width of a calf even when a narrow blade is used, and a production thereof.
- the main purpose is to provide a method.
- the method for manufacturing this semiconductor device is a pressure-sensitive adhesive composed of an active energy ray-curable pressure-sensitive adhesive having a base material layer, a first surface facing the base material layer, and a second surface opposite to the first surface.
- a first step of preparing a dicing / diebonding integrated film comprising a layer and an adhesive layer provided to cover the central portion of the second surface of the adhesive layer, and a dicing / diebonding integrated film.
- the pressure-sensitive adhesive layer has a first region corresponding to a region to which the wafer is attached in the adhesive layer and a second region to which the dicing ring is attached, and the first region is irradiated with active energy rays. As a result, this is a region in which the adhesive strength is reduced as compared with the second region.
- the width of the calf (calf width) formed on the pressure-sensitive adhesive layer of the cut body by blade dicing is 75% or more with respect to the width of the blade (blade width).
- the width of the blade may be 10 to 50 ⁇ m. Even when such a relatively narrow blade is used, the double die can be suppressed more sufficiently.
- the plurality of chips may have a square or rectangular shape and have an area of 200 mm 2 or less.
- This film has a base material layer, a first surface facing the base material layer, and a pressure-sensitive adhesive layer made of an active energy ray-curable pressure-sensitive adhesive having a second surface opposite to the first surface, and a first layer. It is provided with an adhesive layer provided so as to cover the central portion of the second surface.
- the pressure-sensitive adhesive layer has a first region including at least a region corresponding to the bonding position of the wafer in the adhesive layer, and a second region located so as to surround the first region, and the first region is , This is a region in which the adhesive strength is reduced as compared with the second region by irradiation with active energy rays.
- the active energy ray-curable pressure-sensitive adhesive contains a (meth) acrylic resin having a functional group capable of chain polymerization, and the functional group is at least one selected from an acryloyl group and a methacryloyl group, and the (meth) acrylic resin.
- the content of the functional group in is 0.4 mmol / g or more.
- the dicing / die bonding integrated film it can be suitably used in the manufacturing method of the semiconductor device, and even when a narrow blade is used, a sufficient width of the calf can be secured. It will be possible. By using such a dicing / die bonding integrated film, double dies can be suppressed, and as a result, production efficiency can be improved.
- the active energy ray-curable pressure-sensitive adhesive may further contain a cross-linking agent.
- a cross-linking agent When such a cross-linking agent is further contained, the content of the cross-linking agent with respect to the total mass of the active energy ray-curable pressure-sensitive adhesive may be 0.1 to 15% by mass.
- the cross-linking agent may be a reaction product of a polyfunctional isocyanate having two or more isocyanate groups in one molecule and a polyhydric alcohol having three or more hydroxy groups in one molecule.
- the adhesive layer may consist of an adhesive composition containing a reactive group-containing (meth) acrylic copolymer, a curing accelerator, and a filler.
- the dicing / die bonding integrated film may be applied to a manufacturing process of a semiconductor device including a step of fragmenting a wafer into a plurality of chips having an area of 200 mm 2 or less.
- the first aspect of this production method is a laminate including an adhesive layer made of an active energy ray-curable pressure-sensitive adhesive and an adhesive layer formed on the surface of the pressure-sensitive adhesive layer on the surface of the base material layer.
- a step of irradiating a region to be a first region of the pressure-sensitive adhesive layer contained in the laminated body with active energy rays is provided in this order.
- a second aspect of this production method is a step of forming a pressure-sensitive adhesive layer made of a composition whose adhesive strength is reduced by irradiation with active energy rays on the surface of the base material layer, and a pressure-sensitive adhesive layer.
- a step of irradiating the region to be the first region of the above with active energy rays and a step of laminating an adhesive layer on the surface of the pressure-sensitive adhesive layer after irradiating the active energy rays are provided in this order.
- a dicing / die bonding integrated film capable of ensuring a sufficient width of a calf even when a narrow blade is used, and a method for manufacturing the same. Further, according to the present disclosure, there is provided a method for manufacturing a semiconductor device using such a dicing / die bonding integrated film. According to such a method for manufacturing a semiconductor device, it is possible to suppress a double die and improve production efficiency.
- FIG. 1A is a plan view showing an embodiment of a dicing / diebonding integrated film
- FIG. 1B is a schematic cross-sectional view taken along line BB shown in FIG. 1A. is there.
- FIG. 2 is a schematic view showing a state in which a dicing ring is attached to the peripheral edge of the adhesive layer of the dicing / die bonding integrated film and a wafer is attached to the surface of the adhesive layer.
- FIG. 3 is a schematic cross-sectional view of an embodiment of a semiconductor device.
- 4 (a), 4 (b), 4 (c), and 4 (d) are cross-sectional views schematically showing a process of manufacturing a DAF (a laminate of chips and adhesive pieces). ..
- FIG. 5 (a) is a plan view schematically showing one embodiment of the cut body
- FIG. 5 (b) is an enlarged view of a portion E of FIG. 5 (a).
- FIG. 6 is a cross-sectional view schematically showing a process of manufacturing the semiconductor device shown in FIG.
- FIG. 7 is a cross-sectional view schematically showing a process of manufacturing the semiconductor device shown in FIG.
- FIG. 8 is a cross-sectional view schematically showing a process of manufacturing the semiconductor device shown in FIG.
- (meth) acrylic means acrylic or methacrylic, as well as other similar expressions such as (meth) acrylate.
- FIG. 1A is a plan view showing a dicing / diebonding integrated film according to the present embodiment
- FIG. 1B is a schematic cross-sectional view taken along the line BB of FIG.
- the dicing / die bonding integrated film 10 (hereinafter, in some cases, simply referred to as “film 10”) is a step of separating the wafer W into a plurality of chips having an area of 200 mm 2 or less (and a step of picking up the wafer W thereafter). It can be suitably used for a manufacturing process of a semiconductor device including the present invention (see FIGS. 4 (c) and 4 (d)).
- the film 10 is a pressure-sensitive adhesive layer 3 having a base material layer 1, a first surface F1 facing the base material layer 1, and a second surface F2 opposite to the first surface F1, and the pressure-sensitive adhesive layer 3.
- An adhesive layer 5 provided so as to cover the central portion of the second surface F2 is provided in this order.
- an embodiment in which one laminate of the pressure-sensitive adhesive layer 3 and the adhesive layer 5 is formed on the square base material layer 1 is illustrated, but the base material layer 1 has a predetermined length.
- the laminated body of the pressure-sensitive adhesive layer 3 and the adhesive layer 5 may be arranged at predetermined intervals so as to have a square (for example, 100 m or more) and line up in the longitudinal direction thereof.
- the film 10 is a pressure-sensitive adhesive layer 3 having a base material layer 1, a first surface F1 facing the base material layer 1, and a second surface F2 opposite to the first surface F1, and the pressure-sensitive adhesive layer 3.
- An adhesive layer 5 provided so as to cover the central portion of the second surface F2 is provided in this order.
- an embodiment in which one laminate of the pressure-sensitive adhesive layer 3 and the adhesive layer 5 is formed on the square base material layer 1 is illustrated, but the base material layer 1 has a predetermined length.
- the laminated body of the pressure-sensitive adhesive layer 3 and the adhesive layer 5 may be arranged at predetermined intervals so as to have a square (for example, 100 m or more) and line up in the longitudinal direction thereof.
- the pressure-sensitive adhesive layer 3 has a first region 3a including at least a region Rw corresponding to a bonding position of the wafer W in the adhesive layer 5, and a second region 3b located so as to surround the first region 3a. ..
- the broken lines in FIGS. 1 (a) and 1 (b) indicate the boundary between the first region 3a and the second region 3b.
- the first region 3a and the second region 3b are composed of the same composition (active energy ray-curable pressure-sensitive adhesive) before irradiation with active energy rays.
- the first region 3a is a region in which the adhesive strength is reduced as compared with the second region 3b by being irradiated with the active energy rays.
- the second region 3b is a region to which the dicing ring DR is attached (see FIG. 2).
- the second region 3b is a region not irradiated with active energy rays and has a high adhesive force to the dicing ring DR.
- the active energy ray may be at least one selected from ultraviolet rays, electron beams, and visible rays, and may be ultraviolet rays.
- the dose of the active energy ray is, for example, 10 ⁇ 1000mJ / cm 2, 100 ⁇ 700mJ / cm 2, or 100 to be a 500 mJ / cm 2.
- the pressure-sensitive adhesive layer before irradiation with the active energy ray is composed of an active energy ray-curable pressure-sensitive adhesive containing a (meth) acrylic resin.
- the second region 3b, which is not irradiated with the active energy rays, may have the same composition as the pressure-sensitive adhesive layer before the irradiation with the active energy rays.
- the components contained in the active energy ray-curable pressure-sensitive adhesive will be described in detail.
- the active energy ray-curable pressure-sensitive adhesive contains a (meth) acrylic resin having a functional group capable of chain polymerization.
- the functional group is at least one selected from an acryloyl group and a methacryloyl group.
- the content of the functional group in the (meth) acrylic resin is 0.4 mmol / g or more.
- the content of the functional group in the (meth) acrylic resin is 0.5 mmol / g or more, 0.6 mmol / g or more, 0.7 mmol / g or more, 0.8 mmol / g or more, or 0.9 mmol / g or more.
- first region 3a in FIG. 1 When the content of the functional group is 0.4 mmol / g or more, it tends to be easy to form a region (first region 3a in FIG. 1) in which the adhesive strength is appropriately reduced by irradiation with active energy rays. Further, in the calf of the pressure-sensitive adhesive layer 3 formed by dicing, the stress due to curing shrinkage caused by curing by irradiation with active energy rays when forming the first region 3a of the pressure-sensitive adhesive layer 3 is released by dicing.
- the present inventors consider that if the amount of curing shrinkage of the (meth) acrylic resin or the like in the pressure-sensitive adhesive layer 3 is large, the width (calf width) of the adhesive layer 3 can be easily expanded. Therefore, when the content of the functional group is 0.4 mmol / g or more, the amount of curing shrinkage of the pressure-sensitive adhesive layer 3 is sufficient, and a sufficient calf width is secured even when a narrow blade is used. It becomes possible to do. On the other hand, when it is 2.0 mmol / g or less, it tends to be easy to achieve excellent pick-up property.
- the (meth) acrylic resin can be obtained by synthesizing it by a known method.
- the synthesis method include a solution polymerization method, a suspension polymerization method, an emulsion polymerization method, a massive polymerization method, a precipitation polymerization method, a vapor phase polymerization method, a plasma polymerization method, and a supercritical polymerization method.
- the types of polymerization reactions include radical polymerization, cationic polymerization, anionic polymerization, living radical polymerization, living cationic polymerization, living anionic polymerization, coordination polymerization, immortal polymerization, etc., as well as ATRP (atomic transfer radical polymerization) and RAFT (Atomic transfer radical polymerization).
- the monomer used when synthesizing the (meth) acrylic resin is not particularly limited as long as it has one (meth) acryloyl group in one molecule. Specific examples thereof include methyl (meth) acrylate, ethyl (meth) acrylate, butyl (meth) acrylate, isobutyl (meth) acrylate, tert-butyl (meth) acrylate, butoxyethyl (meth) acrylate, and isoamyl (meth) acrylate.
- Aromatic (meth) acrylate 2-tetrahydrofurfuryl (meth) acrylate, N- (meth) acryloyloxyethyl hexahydrophthalimide, 2- (meth) acryloyloxyethyl-N-carbazole, etc.
- Meta acrylate, these caprolactone modified products, ⁇ -carboxy-polycaprolactone mono (meth) acrylate, glycidyl (meth) acrylate, ⁇ -ethylglycidyl (meth) acrylate, ⁇ -propyl glycidyl (meth) acrylate, ⁇ -butyl glycidyl (Meta) acrylate, 2-methylglycidyl (meth) acrylate, 2-ethylglycidyl (meth) acrylate, 2-propylglycidyl (meth) acrylate, 3,4-epoxybutyl (meth) acrylate, 3,4-epoxyheptyl ( Meta) acrylate, ⁇ -ethyl-6,7-epoxyheptyl (meth) acrylate, 3,4-epoxycyclohexylmethyl (meth) acrylate, o-vinylbenzyl glycidy
- the (meth) acrylic resin has at least one functional group selected from a hydroxyl group, a glycidyl group (epoxide group), an amino group and the like as a reaction point with a functional group-introducing compound or a cross-linking agent described later.
- the monomer for synthesizing the (meth) acrylic resin having a hydroxyl group include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, and 3-chloro.
- Examples thereof include compounds having an ethylenically unsaturated group and a hydroxyl group such as -2-hydroxypropyl (meth) acrylate and 2-hydroxybutyl (meth) acrylate. These may be used alone or in combination of two or more.
- Examples of the monomer for synthesizing a (meth) acrylic resin having a glycidyl group include glycidyl (meth) acrylate, ⁇ -ethylglycidyl (meth) acrylate, ⁇ -propyl glycidyl (meth) acrylate, and ⁇ -butyl glycidyl (meth).
- the (meth) acrylic resin synthesized from these monomers contains a functional group capable of chain polymerization.
- the chain-growthable functional group is, for example, at least one selected from an acryloyl group and a methacryloyl group.
- the functional group capable of chain polymerization is, for example, a (meth) acrylic resin having at least one functional group selected from a hydroxyl group, a glycidyl group (epoxide group), an amino group and the like synthesized as described above, and the following. By reacting a compound (functional group-introduced compound), it can be introduced into the (meth) acrylic resin.
- the content of the functional group in the (meth) acrylic resin can be adjusted by the amount of the functional group-introduced compound introduced.
- the functional group-introduced compound include 2-methacryloyloxyethyl isocyanate, meta-isopropenyl- ⁇ , ⁇ -dimethylbenzyl isocyanate, methacryloylisocyanate, allylisocyanate, 1,1- (bisacryloyloxymethyl) ethyl isocyanate; diisocyanate compound.
- examples thereof include an acryloyl monoisocyanate compound obtained by reacting with acrylate. These may be used alone or in combination of two or more.
- the functional group-introduced compound may be 2-methacryloyloxyethyl isocyanate.
- the active energy ray-curable pressure-sensitive adhesive may further contain a photopolymerization initiator.
- the photopolymerization initiator is not particularly limited as long as it generates an active species capable of chain polymerization by irradiating with active energy rays.
- the active energy ray may be at least one selected from ultraviolet rays, electron beams, and visible rays, and may be ultraviolet rays.
- Examples of the photopolymerization initiator include a photoradical polymerization initiator.
- the chain-growth-capable active species means one in which the polymerization reaction is initiated by reacting with a chain-polymerizable functional group.
- photoradical polymerization initiator examples include benzoinketals such as 2,2-dimethoxy-1,2-diphenylethane-1-one; 1-hydroxycyclohexylphenylketone and 2-hydroxy-2-methyl-1-phenylpropane.
- ⁇ -Hydroxyketones such as -1-one, 1- [4- (2-hydroxyethoxy) phenyl] -2-hydroxy-2-methyl-1-propane-1-one; 2-benzyl-2-dimethylamino- ⁇ -Aminoketones such as 1- (4-morpholinophenyl) -butane-1-one, 1,2-methyl-1- [4- (methylthio) phenyl] -2-morpholinopropan-1-one; 1- Oxime esters such as [4- (phenylthio) phenyl] -1,2-octadion-2- (benzoyl) oxime; bis (2,4,6-trimethylbenzoyl) phenylphosphine oxide, bis (2,6-dimethoxybenzoyl) Phenyl oxides such as -2,4,4-trimethylpentylphosphenyl oxide, 2,4,6-trimethylbenzoyldiphenylphosphenyl oxide; 2-
- the content of the photopolymerization initiator in the active energy ray-curable pressure-sensitive adhesive is 0.1 to 30 parts by mass, 0.3 to 10 parts by mass, or 0.3 to 10 parts by mass with respect to 100 parts by mass of the content of the (meth) acrylic resin. , 0.5 to 5 parts by mass.
- the content of the photopolymerization initiator is 0.1 parts by mass or more, the pressure-sensitive adhesive layer is sufficiently cured after irradiation with active energy rays, and pick-up defects tend to be less likely to occur.
- the content of the photopolymerization initiator is 30 parts by mass or less, contamination on the adhesive layer (transfer of the photopolymerization initiator to the adhesive layer) tends to be prevented.
- the active energy ray-curable pressure-sensitive adhesive may further contain a cross-linking agent.
- the cross-linking agent is used, for example, for the purpose of controlling the elastic modulus and / or the adhesiveness of the pressure-sensitive adhesive layer.
- the cross-linking agent may be a compound having two or more functional groups in one molecule capable of reacting with at least one functional group selected from the hydroxyl group, glycidyl group, amino group and the like possessed by the (meth) acrylic resin.
- Examples of the bond formed by the reaction between the cross-linking agent and the (meth) acrylic resin include an ester bond, an ether bond, an amide bond, an imide bond, a urethane bond, and a urea bond.
- the cross-linking agent may be, for example, a polyfunctional isocyanate having two or more isocyanate groups in one molecule.
- a polyfunctional isocyanate When such a polyfunctional isocyanate is used, it can easily react with the hydroxyl group, glycidyl group, amino group and the like contained in the (meth) acrylic resin to form a strong crosslinked structure.
- Examples of the polyfunctional isocyanate having two or more isocyanate groups in one molecule include 2,4-tolylene diisocyanate, 2,6-tolylene diisocyanate, 1,3-xylylene diisocyanate, and 1,4-xylene diisocyanate.
- the cross-linking agent may be a reaction product (isocyanate group-containing oligomer) of a polyfunctional isocyanate and a polyhydric alcohol having two or more hydroxy groups in one molecule.
- examples of polyhydric alcohols having two or more hydroxy groups in one molecule include ethylene glycol, propylene glycol, butylene glycol, 1,6-hexanediol, 1,8-octanediol, and 1,9-nonanediol.
- the cross-linking agent is a reaction product of a polyfunctional isocyanate having two or more isocyanate groups in one molecule and a polyhydric alcohol having three or more hydroxy groups in one molecule (isocyanate group-containing oligomer). It may be.
- isocyanate group-containing oligomer As a cross-linking agent, the pressure-sensitive adhesive layer 3 forms a dense cross-linked structure, which sufficiently suppresses the pressure-sensitive adhesive from adhering to the adhesive layer 5 in the pick-up step. Tend to be able to.
- the content of the cross-linking agent in the active energy ray-curable pressure-sensitive adhesive can be appropriately set according to the cohesive force required for the pressure-sensitive adhesive layer, the elongation at break, the adhesion to the adhesive layer, and the like.
- the content of the cross-linking agent is, for example, 3 to 30 parts by mass, 4 to 15 parts by mass, or 7 to 10 parts by mass with respect to 100 parts by mass of the content of the (meth) acrylic resin. You can.
- By setting the content of the cross-linking agent in the above range it is possible to achieve both the characteristics required for the pressure-sensitive adhesive layer in the dicing step and the characteristics required for the pressure-sensitive adhesive layer in the die bonding step in a well-balanced manner, and it is excellent.
- the pick-up property can also be achieved.
- the content of the cross-linking agent is 3 parts by mass or more with respect to 100 parts by mass of the content of the (meth) acrylic resin, the formation of the cross-linked structure is unlikely to be insufficient, and the interface adhesion with the adhesive layer is likely to occur in the pickup process. The force is sufficiently reduced and defects tend to be less likely to occur during pickup.
- the content of the cross-linking agent is 30 parts by mass or less with respect to 100 parts by mass of the (meth) acrylic resin content, the pressure-sensitive adhesive layer is unlikely to become excessively hard, and the chips tend to be difficult to peel off in the expanding step. It is in.
- the content of the cross-linking agent with respect to the total mass of the active energy ray-curable pressure-sensitive adhesive may be, for example, 0.1 to 15% by mass, 3 to 15% by mass, or 5 to 15% by mass.
- the content of the cross-linking agent is 0.1% by mass or more, it is easy to form a region (first region 3a) in which the adhesive strength is appropriately reduced by irradiation with active energy rays, while the content is 15% by mass or less. Therefore, it tends to be easy to achieve excellent pick-up property.
- the thickness of the pressure-sensitive adhesive layer 3 may be appropriately set according to the conditions (temperature, tension, etc.) of the expanding step, and may be, for example, 1 to 200 ⁇ m, 5 to 50 ⁇ m, or 10 to 20 ⁇ m. If the thickness of the pressure-sensitive adhesive layer 3 is 1 ⁇ m or more, the adhesiveness is unlikely to be insufficient, and if it is 200 ⁇ m or less, the calf width becomes wide when expanding (without relaxing the stress when pushing up the pin), and the pickup is not possible. It tends to be difficult to be sufficient.
- the pressure-sensitive adhesive layer 3 is formed on the base material layer 1.
- a method for forming the pressure-sensitive adhesive layer 3 a known method can be adopted.
- a laminate of the base material layer 1 and the pressure-sensitive adhesive layer 3 may be formed by a two-layer extrusion method, or an active energy ray-curable pressure-sensitive adhesive varnish (varnish for forming a pressure-sensitive adhesive layer) may be prepared. This may be applied to the surface of the base material layer 1, or the pressure-sensitive adhesive layer 3 may be formed on the film that has been mold-released, and this may be transferred to the base material layer 1.
- the active energy ray-curable pressure-sensitive adhesive varnish (varnish for forming a pressure-sensitive adhesive layer) is an organic solvent capable of dissolving a (meth) acrylic resin, a photopolymerization initiator, and a cross-linking agent, and is volatilized by heating. It may be there.
- the organic solvent include aromatic hydrocarbons such as toluene, xylene, mesityrene, cumene, and p-simene; cyclic ethers such as tetrahydrofuran and 1,4-dioxane; methanol, ethanol, isopropanol, butanol, ethylene glycol, and propylene.
- Alcohols such as glycol; ketones such as acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, 4-hydroxy-4-methyl-2-pentanone; methyl acetate, ethyl acetate, butyl acetate, methyl lactate, ethyl lactate, ⁇ -butyrolactone, etc.
- Carbonated esters such as ethylene carbonate and propylene carbonate; ethylene glycol monomethyl ether, ethylene glycol monoethyl ether, ethylene glycol monobutyl ether, ethylene glycol dimethyl ether, ethylene glycol diethyl ether, propylene glycol monomethyl ether, propylene glycol monoethyl ether, propylene glycol Polyhydric alcohol alkyl ethers such as dimethyl ether, propylene glycol diethyl ether, diethylene glycol monomethyl ether, diethylene glycol monoethyl ether, diethylene glycol monobutyl ether, diethylene glycol dimethyl ether, diethylene glycol diethyl ether; ethylene glycol monomethyl ether acetate, ethylene glycol monoethyl ether acetate, ethylene glycol mono Polyhydric alcohol alkyl ether acetates such as butyl ether acetate, propylene glycol monomethyl ether acetate, propylene glycol monomethyl
- organic solvents are, for example, toluene, methanol, ethanol, isopropanol, acetone, methyl ethyl ketone, methyl isobutyl ketone, cyclohexanone, methyl acetate, ethyl acetate, butyl acetate, ethylene glycol monomethyl ether from the viewpoint of solubility and boiling point.
- the solid content concentration of the varnish is usually 10 to 60% by mass.
- the base material layer 1 is not particularly limited as long as a known polymer sheet or film can be used and the expanding step can be carried out under low temperature conditions.
- Specific examples of the base material layer 1 include polyolefins such as crystalline polypropylene, amorphous polypropylene, high-density polyethylene, medium-density polyethylene, low-density polyethylene, ultra-low-density polyethylene, low-density linear polyethylene, polybutene, and polymethylpentene.
- the base material layer 1 has a surface containing at least one resin selected from the group consisting of polyethylene, polypropylene, polyethylene-polypropylene random copolymer, and polyethylene-polypropylene block copolymer as a main component, and the surface thereof. It may be in contact with the pressure-sensitive adhesive layer 3. These resins can be good base materials from the viewpoints of Young's modulus, stress relaxation property, characteristics such as melting point, price, and recycling of waste materials after use.
- the base material layer 1 may be a single layer, and may have a multilayer structure in which layers made of different materials are laminated, if necessary. From the viewpoint of controlling the adhesion to the pressure-sensitive adhesive layer 3, the surface of the base material layer 1 may be subjected to a surface roughness treatment such as a matte treatment or a corona treatment.
- the adhesive composition constituting the adhesive layer 5 may contain a reactive group-containing (meth) acrylic copolymer, a curing accelerator, and a filler. According to the adhesive layer 5 containing these components, the adhesiveness between chips / substrates and between chips / chips is excellent, electrode embedding property, wire embedding property, etc. can be imparted, and the die bonding process is performed at a low temperature. It tends to have characteristics such as being able to adhere and being able to obtain excellent curing in a short time, and having excellent reliability after being molded with a sealing agent.
- the reactive group-containing (meth) acrylic copolymer may be, for example, an epoxy group-containing (meth) acrylic copolymer.
- the epoxy group-containing (meth) acrylic copolymer may be a copolymer obtained by using glycidyl (meth) acrylate as a raw material in an amount of 0.5 to 6% by mass with respect to the obtained copolymer.
- glycidyl (meth) acrylate When the content of glycidyl (meth) acrylate is 0.5% by mass or more, high adhesive strength can be easily obtained, while when it is 6% by mass or less, gelation tends to be suppressed.
- the monomer constituting the remainder of the reactive group-containing (meth) acrylic copolymer is, for example, an alkyl (meth) acrylate having an alkyl group having 1 to 8 carbon atoms such as methyl (meth) acrylate, styrene, acrylonitrile, or the like. It's okay.
- the monomer constituting the remainder of the reactive group-containing (meth) acrylic copolymer may be ethyl (meth) acrylate and / or butyl (meth) acrylate.
- the mixing ratio can be adjusted in consideration of the Tg of the reactive group-containing (meth) acrylic copolymer. When the Tg is ⁇ 10 ° C.
- the glass transition point (Tg) of the epoxy group-containing (meth) acrylic copolymer may be, for example, 30 ° C. or lower.
- the polymerization method is not particularly limited, and examples thereof include pearl polymerization and solution polymerization. Examples of commercially available epoxy group-containing (meth) acrylic copolymers include HTR-860P-3 (trade name, manufactured by Nagase ChemteX Corporation).
- the weight average molecular weight of the epoxy group-containing (meth) acrylic copolymer may be 100,000 or more, and may be 300,000 to 3,000,000 or 500,000 to 2,000,000 from the viewpoint of adhesiveness and heat resistance. When the weight average molecular weight is 3 million or less, it is possible to suppress a decrease in the filling property between the chip and the substrate supporting the chip.
- the weight average molecular weight is a polystyrene-equivalent value using a calibration curve made of standard polystyrene by gel permeation chromatography (GPC).
- the curing accelerator examples include tertiary amines, imidazoles, quaternary ammonium salts and the like.
- Specific examples of the curing accelerator include 2-methylimidazole, 2-ethyl-4-methylimidazole, 1-cyanoethyl-2-phenylimidazole, and 1-cyanoethyl-2-phenylimidazolium trimerite. One of these may be used alone, or two or more thereof may be used in combination.
- the filler may be an inorganic filler.
- the inorganic filler include aluminum hydroxide, magnesium hydroxide, calcium carbonate, magnesium carbonate, calcium silicate, magnesium silicate, calcium oxide, magnesium oxide, aluminum oxide, aluminum nitride, aluminum borate whisker, and boron nitride.
- examples include crystalline silica and amorphous silica. One of these may be used alone, or two or more thereof may be used in combination.
- the adhesive composition may further contain an epoxy resin and an epoxy resin curing agent.
- the epoxy resin include bisphenol A type epoxy resin, bisphenol F type epoxy resin, bisphenol S type epoxy resin, alicyclic epoxy resin, aliphatic chain epoxy resin, phenol novolac type epoxy resin, cresol novolac type epoxy resin, and the like.
- Bisphenol A novolak type epoxy resin diglycidyl etherified product of biphenol, diglycidyl etherified product of naphthalenediol, diglycidyl etherified product of phenols, diglycidyl etherified product of alcohols, and alkyl substituents and halides thereof.
- Bifunctional epoxy resin such as hydrogen additive, novolak type epoxy resin and the like.
- epoxy resins such as a polyfunctional epoxy resin and a heterocycle-containing epoxy resin may be applied. These can be used alone or in combination of two or more.
- a component other than the epoxy resin may be contained as an impurity as long as the characteristics are not impaired.
- Examples of the epoxy resin curing agent include a phenol resin obtained by reacting a phenol compound with a xylylene compound which is a divalent linking group in the presence of a catalyst or an acid catalyst.
- Examples of the phenolic compound used for producing the phenolic resin include phenol, o-cresol, m-cresol, p-cresol, o-ethylphenol, p-ethylphenol, on-propylphenol, and mn-propyl.
- phenol compounds may be used alone or in combination of two or more.
- the xylylene compound which is a divalent linking group used in the production of a phenol resin the following xylylene halides, xylylene diglycols and derivatives thereof can be used. That is, specific examples of the xylene compound include ⁇ , ⁇ '-dichloro-p-xylene, ⁇ , ⁇ '-dichloro-m-xylene, ⁇ , ⁇ '-dichloro-o-xylene, ⁇ , ⁇ '-dibromo-.
- mineral acids such as hydrochloric acid, sulfuric acid, phosphoric acid, and polyphosphoric acid
- organic carboxylic acids such as dimethylsulfate, diethylsulfate, p-toluenesulfonic acid, methanesulfonic acid, and ethanesulfonic acid.
- Acids Super-strong acids such as trifluoromethanesulfonic acid; Strongly acidic ion exchange resins such as alcan sulfonic acid type ion exchange resin; Super strong acid ion exchange resins such as perfluoroalkane sulfonic acid type ion exchange resin (trade name) : Nafion, Nafion, manufactured by Du Pont, "Nafion” is a registered trademark); natural and synthetic zeolites; xylylene which is a substantially raw material at 50 to 250 ° C. using an acidic catalyst such as active white clay (acidic white clay).
- a phenol resin can be obtained by reacting until the compound disappears and the reaction composition becomes constant.
- the reaction time can be appropriately set depending on the raw material and the reaction temperature, for example, about 1 hour to 15 hours, and can be determined while tracking the reaction composition by GPC (gel permeation chromatography) or the like. ..
- the thickness of the adhesive layer 5 may be, for example, 1 to 300 ⁇ m, 5 to 150 ⁇ m, or 10 to 100 ⁇ m. When the thickness of the adhesive layer 5 is 1 ⁇ m or more, the adhesiveness tends to be more excellent, while when the thickness of the adhesive layer 5 is 300 ⁇ m or less, the splitting property and the pick-up property at the time of expanding tend to be more excellent.
- the method for producing the film 10 is to: on the surface of the base material layer 1 a pressure-sensitive adhesive layer made of an active energy ray-curable pressure-sensitive adhesive whose adhesive strength is reduced by irradiation with active energy rays, and on the surface of the pressure-sensitive adhesive layer.
- a step of producing a laminated body including the adhesive layer 5 formed in the above, and a step of irradiating a region to be a first region 3a of the pressure-sensitive adhesive layer contained in the laminated body with active energy rays are provided in this order. ..
- the dose of the active energy ray to the area to be the first region 3a is, for example, 10 ⁇ 1000mJ / cm 2, 100 ⁇ 700mJ / cm 2, or 100 to be a 500 mJ / cm 2.
- a laminate of the pressure-sensitive adhesive layer and the pressure-sensitive adhesive layer 5 is first produced, and then a specific region of the pressure-sensitive adhesive layer is irradiated with active energy rays.
- FIG. 3 is a cross-sectional view schematically showing the semiconductor device according to the present embodiment.
- the semiconductor device 100 shown in this figure includes a substrate 70, four chips S1, S2, S3, S4 laminated on the surface of the substrate 70, electrodes (not shown) on the surface of the substrate 70, and four chips.
- a wire W1, W2, W3, W4 for electrically connecting S1, S2, S3, and S4, and a sealing layer 50 for sealing these are provided.
- the substrate 70 is, for example, an organic substrate and may be a metal substrate such as a lead frame.
- the thickness of the substrate 70 may be, for example, 70 to 140 ⁇ m or 80 to 100 ⁇ m from the viewpoint of suppressing the warp of the semiconductor device 100.
- the four chips S1, S2, S3, and S4 are laminated via the cured product 5C of the adhesive piece 5P.
- the shapes of the chips S1, S2, S3, and S4 in a plan view are, for example, square or rectangular.
- the area of the chips S1, S2, S3, S4 may be, for example, 200 mm 2 or less, 150 mm 2 or less, 100 mm 2 or less, 50 mm 2 or less, 30 mm 2 or less, 20 mm 2 or less, 10 mm 2 or less, or 9 mm 2 or less.
- the length of one side of the chips S1, S2, S3, S4 is, for example, 0.1 to 20 mm, 0.1 to 15 mm, 0.1 to 10 mm, 0.1 to 8 mm, 0.1 to 6 mm, 0.1. It may be up to 3 mm, 0.1 to 2 mm, or 0.1 to 1 mm.
- the thickness of the chips S1, S2, S3, S4 may be, for example, 10 to 170 ⁇ m or 25 to 100 ⁇ m.
- the length of one side of the four chips S1, S2, S3, and S4 may be the same or different from each other, and the thickness is also the same.
- the method for manufacturing the semiconductor device 100 includes the first step of preparing the film 10 described above, the wafer W being attached to the adhesive layer 5 of the film 10, and the second surface F2 of the adhesive layer 3.
- the wafer W is separated into a plurality of chips S together with the adhesive layer 5 and the adhesive layer 3 to form a cut body 20.
- Step, (dicing step), and DAF8 laminated body of chip S1 and adhesive piece 5P, see FIG. 4D) are picked up from the first region 3a of the adhesive layer 3 of the cutting body 20.
- the step 4 includes a fifth step of mounting the chip S1 on the substrate 70 via the adhesive piece 5P.
- the above-mentioned film 10 is prepared. As shown in FIGS. 4A and 4B, the film 10 is attached so that the adhesive layer 5 is in contact with one surface of the wafer W. Further, the dicing ring DR is attached to the second surface F2 of the pressure-sensitive adhesive layer 3.
- the wafer W, the adhesive layer 5, and the adhesive layer 3 are diced by blade dicing using a blade.
- the wafer W is separated together with the adhesive layer 5 and the adhesive layer 3 into a chip S.
- the adhesive layer 5 is also individualized to become an adhesive piece 5P. In this way, the cut body 20 is formed.
- the wafer W may be thinned by grinding the wafer W prior to dicing the wafer W.
- a calf is formed in the pressure-sensitive adhesive layer 3 of the cut body 20.
- the calf width formed on the pressure-sensitive adhesive layer 3 of the cut body 20 by blade dicing is 75% or more, and may be 78% or more or 80% or more with respect to the blade width. By providing such a calf width, double dies can be suppressed, and as a result, production efficiency can be improved.
- the pressure-sensitive adhesive layer 3 may shrink due to dicing, that is, it may exceed 100%.
- the calf width formed on the pressure-sensitive adhesive layer 3 of the cut body 20 by blade dicing may be 160% or less or 150% or less with respect to the blade width.
- the calf formed by dicing is generated when the stress due to curing shrinkage caused by curing by irradiation with active energy rays when forming the first region 3a of the pressure-sensitive adhesive layer 3 is released by dicing, and the pressure-sensitive adhesive layer 3 is formed.
- the present inventors consider that when the amount of curing shrinkage of the (meth) acrylic resin or the like in the above is large, the width (calf width) of the (meth) acrylic resin or the like is easily expanded.
- the above-mentioned dicing / die-bonding integrated film has a sufficient amount of curing shrinkage, and by using this, it is possible to form a calf width satisfying the above requirements.
- the distance between the adhesive layers between adjacent chips can be measured at a plurality of points (at least three points) using an optical microscope, and an average value thereof can be applied.
- the calf width formed may differ depending on the direction of the blade dicing.
- this point will be described with reference to FIG. 5 (b).
- direction A the same direction as direction A is defined as direction Ch1
- direction Ch2 the direction orthogonal to Ch1 is defined as direction Ch2.
- the calf width WCh1 between adjacent chips in the direction Ch1 (calf width formed by dying in the direction Ch2) and the calf width WCh2 (calf width formed by dying in the direction Ch1) between adjacent chips in the direction Ch2
- the calf width WCh1 tends to have a larger swing width than the calf width WCh2.
- either the calf width WCh1 or the calf width WCh2 may satisfy the calf width condition, but the viewpoint of more reliably suppressing the double die. Therefore, it is preferable that both the calf width WCh1 and the calf width WCh2 satisfy the above-mentioned calf width condition.
- the calf width formed on the pressure-sensitive adhesive layer 3 of the cut body 20 by blade dicing may be, for example, 10 ⁇ m or more, 13 ⁇ m or more, 15 ⁇ m or more, or 17 ⁇ m or more.
- the upper limit of the calf width is not particularly limited, but can be, for example, 50 ⁇ m or less.
- the blade width may be 10 to 50 ⁇ m, 10 to 30 ⁇ m, or 10 to 25 ⁇ m. Even when such a relatively narrow blade is used, the double die can be suppressed more sufficiently.
- an actually measured value obtained from a cut in a silicon wafer using an optical microscope can be applied.
- the method for measuring the measured value may be, for example, the method described in Examples.
- the adhesive layer 3 is separated from each other by expanding the base material layer 1 under normal temperature or cooling conditions as shown in FIG. 4 (d) without irradiating the pressure-sensitive adhesive layer 3 with active energy rays.
- the adhesive piece 5P is peeled from the adhesive layer 3 by pushing it up with the pin 42, and the DAF 8 is sucked and picked up by the suction collet 44.
- the manufacturing method of the semiconductor device 100 will be specifically described with reference to FIGS. 6, 7, and 8.
- the first-stage chip S1 (chip S) is crimped to a predetermined position on the substrate 70 via the adhesive piece 5P.
- the adhesive piece 5P is cured by heating.
- the adhesive piece 5P is cured to become a cured product 5C.
- the curing treatment of the adhesive piece 5P may be carried out in a pressurized atmosphere from the viewpoint of reducing voids.
- the second-stage chip S2 is mounted on the surface of the chip S1 in the same manner as the mounting of the chip S1 on the substrate 70. Further, the structure 60 shown in FIG. 7 is manufactured by mounting the third-stage and fourth-stage chips S3 and S4. After the chips S1, S2, S3, S4 and the substrate 70 are electrically connected by wires W1, W2, W3, W4 (see FIG. 8), the semiconductor element and the wire are sealed by the sealing layer 50. The semiconductor device 100 shown in 3 is completed.
- the present invention is not limited to the above embodiments.
- the film 10 including the base material layer 1, the pressure-sensitive adhesive layer 3, and the adhesive layer 5 in this order has been exemplified, but the film 10 may not include the adhesive layer 5. .. Further, the film 10 may further include a cover film (not shown) that covers the adhesive layer 5.
- the solution containing the acrylic resin (A-1) obtained as described above was vacuum dried at 60 ° C. overnight.
- the solid content thus obtained was elementally analyzed by a fully automatic elemental analyzer (manufactured by Elemental Co., Ltd., trade name: varioEL), and the content of the functional group derived from the introduced 2-methacryloyloxyethyl isocyanate was nitrogen-containing. When calculated from the amount, it was 0.50 mmol / g.
- the polystyrene-equivalent weight average molecular weight of the acrylic resin (A-1) was determined using the following device. That is, SD-8022 / DP-8020 / RI-8020 manufactured by Tosoh Corporation was used, Gelpack GL-A150-S / GL-A160-S manufactured by Hitachi Kasei Co., Ltd. was used for the column, and tetrahydrofuran was used as the eluent. GPC measurement was performed. As a result, the polystyrene-equivalent weight average molecular weight was 800,000. The hydroxyl value and acid value measured according to the method described in JIS K0070 were 56.1 mgKOH / g and 6.5 mgKOH / g. These results are summarized in Table 1.
- Example 1 [Preparation of dicing film (adhesive layer)]
- an active energy ray-curable pressure-sensitive adhesive varnish (varnish for forming a pressure-sensitive adhesive layer) was prepared (see Table 2).
- the amount of ethyl acetate (solvent) was adjusted so that the total solid content of the varnish was 25% by mass.
- a polyethylene terephthalate film (width 450 mm, length 500 mm, thickness 38 ⁇ m) with a mold release treatment on one surface was prepared.
- a varnish of an active energy ray-curable pressure-sensitive adhesive was applied to the surface subjected to the mold release treatment using an applicator, and then dried at 80 ° C. for 5 minutes.
- a laminate (dicing film) composed of a polyethylene terephthalate film and a pressure-sensitive adhesive layer having a thickness of 30 ⁇ m formed on the polyethylene terephthalate film was obtained.
- a polyolefin film (width 450 mm, length 500 mm, thickness 80 ⁇ m) with corona treatment on one side was prepared.
- the surface treated with corona and the pressure-sensitive adhesive layer of the laminated body were bonded together at room temperature.
- the pressure-sensitive adhesive layer was transferred to the polyolefin film (cover film) by moving the rubber roll in one direction and pressing it. Then, it was left at room temperature for 3 days to obtain a dicing film with a cover film.
- a varnish for forming an adhesive layer was prepared by mixing the following components. First, cyclohexanone (solvent) was added to the mixture containing the following components, and the mixture was stirred and mixed, and then kneaded for 90 minutes using a bead mill.
- -Epoxy resin (YDCN-700-10 (trade name), manufactured by Nippon Steel & Sumitomo Metal Chemical Co., Ltd., cresol novolac type epoxy resin, epoxy equivalent: 210, molecular weight: 1200, softening point: 80 ° C.): 14 parts by mass-phenol resin ( Millex XLC-LL (trade name), manufactured by Mitsui Chemicals, Inc., phenol resin, hydroxyl group equivalent: 175, water absorption: 1.8%, heating weight reduction rate at 350 ° C: 4%): 23 parts by mass, silane coupling Agent (NUC A-189 (trade name) manufactured by NUC Co., Ltd., ⁇ -mercaptopropyltrimethoxysilane): 0.2 parts by mass ⁇ silane coupling agent (NUCA-1160 (trade name) manufactured by Nippon Unicar Co., Ltd., ⁇ -Ureidopropyltriethoxysilane): 0.1 part by mass ⁇ Filler (SC2050-HLG
- a varnish for forming an adhesive layer (at least with a reactive group-containing (meth) acrylic copolymer) is subjected to the steps of stirring and mixing and vacuum degassing. , A varnish of an adhesive composition containing a curing accelerator and a filler) was obtained.
- HTR-860P-3 (trade name), manufactured by Nagase ChemteX Corporation, weight average molecular weight 800,000): 16 parts by mass-curing accelerator (Curesol 2PZ-CN (trade name), Shikoku Kasei Kogyo Co., Ltd., 1-cyanoethyl-2-phenylimidazole, "Curesol” is a registered trademark): 0.1 parts by mass
- a polyethylene terephthalate film (thickness 35 ⁇ m) with a mold release treatment on one surface was prepared.
- a varnish for forming an adhesive layer was applied to the surface subjected to the mold release treatment using an applicator, and then heat-dried at 140 ° C. for 5 minutes.
- a laminate (die bonding film) composed of a polyethylene terephthalate film (carrier film) and an adhesive layer (B stage state) having a thickness of 25 ⁇ m formed on the polyethylene terephthalate film (carrier film) was obtained.
- a die bonding film composed of an adhesive layer and a carrier film was cut into a circle having a diameter of 335 mm together with the carrier film.
- a dicing film from which the polyethylene terephthalate film was peeled off was attached to the cut die bonding film at room temperature, and then left at room temperature for 1 day. Then, the dicing film was cut into a circle having a diameter of 370 mm to obtain a laminated body.
- the region (first region of the pressure-sensitive adhesive layer) corresponding to the bonding position of the wafer in the adhesive layer of the laminated body thus obtained was irradiated with ultraviolet rays as follows.
- a pulsed xenon lamp was used to partially irradiate ultraviolet rays at an irradiation amount of 70 W and 300 mJ / cm 2.
- the irradiation of ultraviolet rays was performed on a portion having an inner diameter of 318 mm from the center of the film using a blackout curtain. In this way, the dicing / die bonding integrated film of Example 1 was obtained for use in various evaluation tests described later.
- Cuts are made at predetermined intervals in the same direction as the rubber roll is operated, and further cuts are made at predetermined intervals in the direction orthogonal to the direction in which the rubber roll is operated, and the chips are separated into a plurality of chips with adhesive pieces.
- -Dicer DISCO
- DFD-6361 -Blade ZH05-SD4000-N1-70-BB manufactured by DISCO ⁇ Blade rotation speed: 40,000 rpm ⁇
- Dicing speed 30 mm / s -Cut depth from the surface of the adhesive layer to the base material layer: 20 ⁇ m
- Cut mode Down cut ⁇ Chip size: 10 mm x 10 mm
- the directions in which the rubber roll is operated when the adhesive layer is transferred to the polyolefin film (cover film) are the directions Ch1 and Ch1.
- the direction orthogonal to each other was defined as the direction Ch2, and the calf width WCh1 between adjacent chips in the direction Ch1 and the calf width WCh2 between the adjacent chips in the direction Ch2 were measured using an optical microscope. In the measurement, three measurement points were set, and the average value of these points was calculated as the calf width. The results are shown in Table 2.
- the dicing / die bonding integrated film of Example 1 was bonded to a wafer having a thickness of 400 ⁇ m by heating at 80 ° C. for 10 seconds. Then, the depth of cut from the surface of the wafer to the adhesive layer was set to 100 ⁇ m, and one cut was made under the same conditions as the dicing conditions for measuring the calf width described above. Next, the wafer was cut so as to be orthogonal to this cut, and the cut surface in the obtained cut was observed. The width at a height of 20 ⁇ m from the bottom of the dicing was measured as the blade width. The blade width was 20.8 ⁇ m. In the evaluation test, this value was used as the blade width to calculate the ratio of the calf width to the blade width.
- Examples 2 to 11 and Comparative Examples 1 and 2 The composition and ultraviolet irradiation amount of the pressure-sensitive adhesive layer shown in Example 1 of Table 2 are changed to the composition and ultraviolet irradiation amount of the pressure-sensitive adhesive layer shown in each of Examples and Comparative Examples of Tables 2, 3 and 4. , The evaluation test was carried out in the same manner as in Example 1 except that the dicing conditions shown in Example 1 of Table 2 were changed to the dicing conditions shown in each of Examples and Comparative Examples of Tables 2, 3 and 4. Was done.
- the photopolymerization initiator (B-2) is 2-hydroxy-1- ⁇ 4- [4- (2-hydroxy-2-methyl-propionyl) -benzyl] -phenyl ⁇ -2-methyl-propane-1. -On (manufactured by Chivas Specialty Chemicals Co., Ltd., Irgacure 127, "Irgacure” is a registered trademark). The results are shown in Tables 2, 3 and 4.
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Abstract
Description
図1(a)は、本実施形態に係るダイシング・ダイボンディング一体型フィルムを示す平面図であり、図1(b)は、図1のB-B線に沿った模式断面図である。ダイシング・ダイボンディング一体型フィルム10(以下、場合により、単に「フィルム10」という。)は、ウェハWを面積200mm2以下の複数のチップに個片化する工程(及びその後のピックアップする工程)を含む半導体装置の製造プロセスに好適に用いることができる(図4(c)及び図4(d)参照)。
粘着剤層3は、接着剤層5におけるウェハWの貼付け位置に対応する領域Rwを少なくとも含む第1の領域3aと、第1の領域3aを囲むように位置する第2の領域3bとを有する。図1(a)及び図1(b)における破線は第1の領域3aと第2の領域3bの境界を示す。第1の領域3a及び第2の領域3bは、活性エネルギー線の照射前において同一の組成物(活性エネルギー線硬化型粘着剤)からなる。第1の領域3aは、活性エネルギー線が照射されることによって、第2の領域3bと比較して粘着力が低下した状態の領域である。第2の領域3bは、ダイシングリングDRが貼り付けられる領域である(図2参照)。第2の領域3bは、活性エネルギー線が照射されていない領域であり、ダイシングリングDRに対する高い粘着力を有する。活性エネルギー線は、紫外線、電子線、及び可視光線から選ばれる少なくとも1種であってよく、紫外線であってよい。活性エネルギー線の照射量は、例えば、10~1000mJ/cm2であり、100~700mJ/cm2、又は100~500mJ/cm2であってよい。
活性エネルギー線硬化型粘着剤は、連鎖重合可能な官能基を有する(メタ)アクリル系樹脂を含む。このような(メタ)アクリル系樹脂を含む場合、官能基は、アクリロイル基及びメタクリロイル基から選ばれる少なくとも1種である。(メタ)アクリル系樹脂における官能基の含有量は、0.4mmol/g以上である。(メタ)アクリル系樹脂における官能基の含有量は、0.5mmol/g以上、0.6mmol/g以上、0.7mmol/g以上、0.8mmol/g以上、又は0.9mmol/g以上であってもよく、2.0mmol/g以下、1.8mmol/g以下、1.5mmol/g以下、1.2mmol/g以下、又は1.0mmol/g以下であってもよい。官能基の含有量が0.4mmol/g以上であることで、活性エネルギー線の照射によって粘着力が適度に低下した領域(図1における第1の領域3a)を形成し易い傾向にある。また、ダイシングによって形成される粘着剤層3のカーフは、粘着剤層3の第1の領域3aを形成する際の活性エネルギー線照射による硬化によって生じる硬化収縮による応力がダイシングによって開放されることによって発生し、粘着剤層3における(メタ)アクリル系樹脂等の硬化収縮量が多いと、その幅(カーフ幅)が拡張し易くなると本発明者らは考えている。そのため、官能基の含有量が0.4mmol/g以上であることで、粘着剤層3の硬化収縮量が充分となり、幅の狭いブレードを用いた場合であっても、カーフ幅を充分に確保することが可能となる。他方、2.0mmol/g以下であることで、優れたピックアップ性を達成し易い傾向にある。
活性エネルギー線硬化型粘着剤は、光重合開始剤をさらに含んでいてもよい。光重合開始剤は、活性エネルギー線を照射することで連鎖重合可能な活性種を発生するものであれば、特に制限はない。活性エネルギー線は、紫外線、電子線、及び可視光線から選ばれる少なくとも1種であってよく、紫外線であってよい。光重合開始剤としては、例えば、光ラジカル重合開始剤等が挙げられる。ここで連鎖重合可能な活性種とは、連鎖重合可能な官能基と反応することで重合反応が開始されるものを意味する。
活性エネルギー線硬化型粘着剤は、架橋剤をさらに含んでいてもよい。架橋剤は、例えば、粘着剤層の弾性率及び/又は粘着性の制御を目的に用いられる。架橋剤は、(メタ)アクリル系樹脂が有する水酸基、グリシジル基、アミノ基等から選ばれる少なくとも1種の官能基と反応し得る官能基を一分子中に2つ以上有する化合物であればよい。架橋剤と(メタ)アクリル系樹脂との反応によって形成される結合としては、例えば、エステル結合、エーテル結合、アミド結合、イミド結合、ウレタン結合、ウレア結合等が挙げられる。
基材層1は、既知のポリマーシート又はフィルムを用いることができ、低温条件下において、エキスパンド工程を実施可能なものであれば、特に制限されない。基材層1の具体例としては、結晶性ポリプロピレン、非晶性ポリプロピレン、高密度ポリエチレン、中密度ポリエチレン、低密度ポリエチレン、超低密度ポリエチレン、低密度直鎖ポリエチレン、ポリブテン、ポリメチルペンテン等のポリオレフィン、エチレン-酢酸ビニル共重合体、アイオノマー樹脂、エチレン-(メタ)アクリル酸共重合体、エチレン-(メタ)アクリル酸エステル(ランダム、交互)共重合体、エチレン-ブテン共重合体、エチレン-ヘキセン共重合体、ポリウレタン、ポリエチレンテレフタレート、ポリエチレンナフタレート等のポリエステル、ポリカーボネート、ポリイミド、ポリエーテルエーテルケトン、ポリイミド、ポリエーテルイミド、ポリアミド、全芳香族ポリアミド、ポリフェニルスルフイド、アラミド(紙)、ガラス、ガラスクロス、フッ素樹脂、ポリ塩化ビニル、ポリ塩化ビニリデン、セルロース系樹脂、シリコーン樹脂、又は、これらに可塑剤を混合した混合物、あるいは、電子線照射により架橋を施した硬化物が挙げられる。
接着剤層5には、既知のダイボンディングフィルムを構成する接着剤組成物を適用できる。具体的には、接着剤層5を構成する接着剤組成物は、反応性基含有(メタ)アクリル共重合体と、硬化促進剤と、フィラーとを含んでいてもよい。これらの成分を含む接着剤層5によれば、チップ/基板間、チップ/チップ間の接着性に優れ、また、電極埋め込み性、ワイヤ埋め込み性等も付与可能で、かつダイボンディング工程では低温で接着でき、短時間で優れた硬化が得られる、封止剤でモールド後は優れた信頼性を有する等の特徴を有する傾向にある。
フィルム10の製造方法は、基材層1の表面上に、活性エネルギー線が照射されることによって粘着力が低下する活性エネルギー線硬化型粘着剤からなる粘着剤層と、粘着剤層の表面上に形成された接着剤層5とを含む積層体を作製する工程と、積層体に含まれる粘着剤層の第1の領域3aとなる領域に活性エネルギー線を照射する工程とをこの順序で備える。第1の領域3aとなる領域に対する活性エネルギー線の照射量は、例えば、10~1000mJ/cm2であり、100~700mJ/cm2、又は100~500mJ/cm2であってよい。当該製造方法は、粘着剤層と接着剤層5の積層体を先に作製し、その後、粘着剤層の特定の領域に活性エネルギー線を照射するものである。
図3は、本実施形態に係る半導体装置を模式的に示す断面図である。この図に示す半導体装置100は、基板70と、基板70の表面上に積層された四つのチップS1,S2,S3,S4と、基板70の表面上の電極(不図示)と、四つのチップS1,S2,S3,S4とを電気的に接続するワイヤW1,W2,W3,W4と、これらを封止している封止層50とを備える。
[アクリル系樹脂(A-1)の合成]
スリーワンモータ、撹拌翼、及び窒素導入管が備え付けられた容量2000mLのフラスコに以下の成分を入れた。
・酢酸エチル(溶剤):635質量部
・2-エチルヘキシルアクリレート:395質量部
・2-ヒドロキシエチルアクリレート:100質量部
・メタクリル酸:5質量部
・アゾビスイソブチロニトリル:0.08質量部
[アクリル系樹脂(A-2)の合成]
表1の製造例1に示す原料モノマー組成を、表1の製造例2に示す原料モノマー組成に変更した以外は、製造例1と同様の手法で製造例2のアクリル系樹脂(A-2)を含む溶液を得た。製造例2のアクリル系樹脂(A-2)の性状の測定結果を表1に示す。
[アクリル系樹脂(A-3)の合成]
表1の製造例1に示す原料モノマー組成を、表1の製造例3に示す原料モノマー組成に変更した以外は、製造例1と同様の手法で製造例3のアクリル系樹脂(A-3)を含む溶液を得た。製造例3のアクリル系樹脂(A-3)の性状の測定結果を表1に示す。
[アクリル系樹脂(A-4)の合成]
表1の製造例1に示す原料モノマー組成を、表1の製造例4に示す原料モノマー組成に変更した以外は、製造例1と同様の手法で製造例2のアクリル系樹脂(A-4)を含む溶液を得た。製造例4のアクリル系樹脂(A-4)の性状の測定結果を表1に示す。
[アクリル系樹脂(A-5)の合成]
表1の製造例1に示す原料モノマー組成を、表1の製造例5に示す原料モノマー組成に変更した以外は、製造例1と同様の手法で製造例5のアクリル系樹脂(A-5)を含む溶液を得た。製造例5のアクリル系樹脂(A-5)の性状の測定結果を表1に示す。
[ダイシングフィルム(粘着剤層)の作製]
以下の成分を混合することで、活性エネルギー線硬化型粘着剤のワニス(粘着剤層形成用のワニス)を調製した(表2参照)。酢酸エチル(溶剤)の量は、ワニスの総固形分含有量が25質量%となるように調整した。
・製造例1のアクリル系樹脂(A-1)を含む溶液:100質量部(固形分)
・光重合開始剤(B-1)(1-ヒドロキシシクロヘキシル-フェニル-ケトン(チバスペシャリティケミカルズ株式会社製、イルガキュア184、「イルガキュア」は登録商標):1.0質量部
・架橋剤(C-1)(多官能イソシアネート(トリレンジイソシアネートとトリメチロールプロパンとの反応物)、日本ポリウレタン工業株式会社製、コロネートL、固形分:75%):8.0質量部(固形分)
・酢酸エチル(溶剤)
以下の成分を混合することで、接着剤層形成用のワニスを調製した。まず、以下の成分を含む混合物に対して、シクロヘキサノン(溶剤)を加えて撹拌混合した後、更にビーズミルを用いて90分混練した。
・エポキシ樹脂(YDCN-700-10(商品名)、新日鉄住金化学株式会社製、クレゾールノボラック型エポキシ樹脂、エポキシ当量:210、分子量:1200、軟化点:80℃):14質量部
・フェノール樹脂(ミレックスXLC-LL(商品名)、三井化学株式会社製、フェノール樹脂、水酸基当量:175、吸水率:1.8%、350℃における加熱重量減少率:4%):23質量部
・シランカップリング剤(NUC A-189(商品名)株式会社NUC製、γ-メルカプトプロピルトリメトキシシラン):0.2質量部
・シランカップリング剤(NUCA-1160(商品名)、日本ユニカー株式会社製、γ-ウレイドプロピルトリエトキシシラン):0.1質量部
・フィラー(SC2050-HLG(商品名)、アドマテックス株式会社製、シリカ、平均粒径0.500μm):32質量部
・エポキシ基含有アクリル共重合体(HTR-860P-3(商品名)、ナガセケムテックス株式会社製、重量平均分子量80万):16質量部
・硬化促進剤(キュアゾール2PZ-CN(商品名)、四国化成工業株式会社製、1-シアノエチル-2-フェニルイミダゾール、「キュアゾール」は登録商標):0.1質量部
接着剤層とキャリアフィルムとからなるダイボンディングフィルムを、キャリアフィルムごと直径335mmの円形にカットした。カットしたダイボンディングフィルムに、ポリエチレンテレフタレートフィルムを剥離したダイシングフィルムを室温で貼付け後、室温で1日放置した。その後、直径370mmの円形にダイシングフィルムをカットし、積層体を得た。このようにして得た積層体の接着剤層におけるウェハの貼付け位置に対応する領域(粘着剤層の第1の領域)に以下のようにして紫外線を照射した。すなわち、パルスドキセノンランプを用いて70W、300mJ/cm2の照射量で部分的に紫外線を照射した。なお、紫外線の照射は、暗幕を用いてフィルムの中心から内径318mmの部分に対して行った。このようにして、後述の種々の評価試験に供するための実施例1のダイシング・ダイボンディング一体型フィルムを得た。
(カーフ幅の測定)
実施例1のダイシング・ダイボンディング一体型フィルムをウェハ(シリコン、直径12インチ、厚さ50μm)に80℃で10秒間加熱することによって貼り合せた。その後、以下のダイシング条件で所定サイズの四角形のチップが複数得られるように、上述の「ダイシングフィルム(粘着剤層)の作製」において、粘着剤層をポリオレフィンフィルム(カバーフィルム)に転写した際にゴムロールを動作させた方向と同じ方向に所定の間隔で切り込みを入れ、当該ゴムロールを動作させた方向と直交する方向に所定の間隔でさらに切り込みを入れて、複数の接着剤片付きチップに個片化した。
・ダイサー:DISCO社製、DFD-6361
・ブレード:DISCO社製、ZH05-SD4000-N1-70-BB
・ブレード回転数:40000rpm
・ダイシング速度:30mm/s
・粘着剤層の表面から基材層への切り込み深さ:20μm
・カットモード:ダウンカット
・チップサイズ:10mm×10mm
実施例1のダイシング・ダイボンディング一体型フィルムを厚さ400μmのウェハに80℃で10秒間加熱することによって貼り合せた。その後、ウェハの表面から接着剤層への切り込み深さを100μmとし、上述のカーフ幅の測定のダイシング条件と同じ条件で切り込みを1回入れた。次いでこの切り込みに対して直交するようにウェハを切断し、得られた切断における切断面を観察した。ダイシングの最下部から20μmの高さの位置の幅をブレード幅として測定した。ブレード幅は、20.8μmであった。評価試験では、この値をブレード幅として、ブレード幅に対するカーフ幅の比率の算出に用いた。
得られたカーフ幅及びブレード幅から、ブレード幅に対するカーフ幅の比率を算出した。結果を表2に示す。
表2の実施例1に示す粘着剤層の組成及び紫外線照射量を、表2、表3、及び表4の各実施例及び各比較例に示す粘着剤層の組成及び紫外線照射量に変更し、表2の実施例1に示すダイシング条件を、表2、表3、及び表4の各実施例及び各比較例に示すダイシング条件に変更した以外は、実施例1と同様にして、評価試験を行った。なお、光重合開始剤(B-2)は、2-ヒドロキシ-1-{4-[4-(2-ヒドロキシ-2-メチル-プロピオニル)-ベンジル]-フェニル}-2-メチル-プロパン-1-オン(チバスペシャリティケミカルズ株式会社製、イルガキュア127、「イルガキュア」は登録商標)である。結果を表2、表3、及び表4に示す。
Claims (10)
- 基材層と、前記基材層と対面する第1の面及び前記第1の面の反対側の第2の面を有する、活性エネルギー線硬化型粘着剤からなる粘着剤層と、前記粘着剤層の前記第2の面の中央部を覆うように設けられた接着剤層とを備えるダイシング・ダイボンディング一体型フィルムを準備する第1の工程と、
前記ダイシング・ダイボンディング一体型フィルムの前記接着剤層に対してウェハを貼るとともに、前記粘着剤層の前記第2の面に対してダイシングリングを貼る第2の工程と、
ブレードを用いたブレードダイシングによって、前記接着剤層及び前記粘着剤層とともに、前記ウェハを複数のチップに個片化して切断体を形成する第3の工程と、
前記接着剤層が個片化されてなる接着剤片とともに、前記チップを前記切断体の前記粘着剤層からピックアップする第4の工程と、
前記接着剤片を介して前記チップを、基板又は他のチップ上にマウントする第5の工程と、
を備え、
前記粘着剤層は、前記接着剤層における前記ウェハが貼り付けられる領域に対応する第1の領域と、前記ダイシングリングが貼り付けられる第2の領域とを有し、
前記第1の領域は、活性エネルギー線の照射により、前記第2の領域と比較して粘着力が低下した状態の領域であり、
前記第3の工程において、前記ブレードダイシングによって前記切断体の前記粘着剤層に形成されるカーフの幅が、前記ブレードの幅に対して75%以上である、
半導体装置の製造方法。 - 前記ブレードの幅が10~50μmである、
請求項1に記載の半導体装置の製造方法。 - 前記複数のチップは、正方形又は長方形の形状を有し、かつ面積200mm2以下である、
請求項1又は2に記載の半導体装置の製造方法。 - 基材層と、
前記基材層と対面する第1の面及び前記第1の面の反対側の第2の面を有する、活性エネルギー線硬化型粘着剤からなる粘着剤層と、
前記第2の面の中央部を覆うように設けられた接着剤層と、
を備え、
前記粘着剤層は、前記接着剤層におけるウェハの貼付け位置に対応する領域を少なくとも含む第1の領域と、前記第1の領域を囲むように位置する第2の領域とを有し、
前記第1の領域は、活性エネルギー線の照射により、前記第2の領域と比較して粘着力が低下した状態の領域であり、
前記活性エネルギー線硬化型粘着剤が、連鎖重合可能な官能基を有する(メタ)アクリル系樹脂を含み、
前記官能基が、アクリロイル基及びメタクリロイル基から選ばれる少なくとも1種であり、
前記(メタ)アクリル系樹脂における前記官能基の含有量が、0.4mmol/g以上である、
ダイシング・ダイボンディング一体型フィルム。 - 前記活性エネルギー線硬化型粘着剤が、架橋剤をさらに含み、
前記活性エネルギー線硬化型粘着剤の全質量に対する前記架橋剤の含有量が、0.1~15質量%である、
請求項4に記載のダイシング・ダイボンディング一体型フィルム。 - 前記架橋剤が、一分子中に2つ以上のイソシアネート基を有する多官能イソシアネートと、一分子中に3つ以上のヒドロキシ基を有する多価アルコールとの反応物である、
請求項5に記載のダイシング・ダイボンディング一体型フィルム。 - 前記接着剤層が、反応性基含有(メタ)アクリル共重合体と、硬化促進剤と、フィラーとを含む接着剤組成物からなる、
請求項4~6のいずれか一項に記載のダイシング・ダイボンディング一体型フィルム。 - ウェハを面積200mm2以下の複数のチップに個片化する工程を含む半導体装置の製造プロセスに適用される、
請求項4~7のいずれか一項に記載のダイシング・ダイボンディング一体型フィルム。 - 請求項4~8のいずれか一項に記載のダイシング・ダイボンディング一体型フィルムの製造方法であって、
基材層の表面上に、活性エネルギー線硬化型粘着剤からなる粘着剤層と、前記粘着剤層の表面上に形成された前記接着剤層とを含む積層体を作製する工程と、
前記積層体に含まれる前記粘着剤層の前記第1の領域となる領域に活性エネルギー線を照射する工程と、
をこの順に備える、
ダイシング・ダイボンディング一体型フィルムの製造方法。 - 請求項4~8のいずれか一項に記載のダイシング・ダイボンディング一体型フィルムの製造方法であって、
基材層の表面上に、活性エネルギー線が照射されることによって粘着力が低下する組成物からなる粘着剤層を形成する工程と、
前記粘着剤層の前記第1の領域となる領域に活性エネルギー線を照射する工程と、
前記活性エネルギー線を照射した後の前記粘着剤層の表面上に前記接着剤層を積層する工程と、
をこの順に備える、
ダイシング・ダイボンディング一体型フィルムの製造方法。
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