WO2022118969A1 - 硬化性樹脂フィルム、半導体装置製造用フィルム材、半導体装置製造用硬化性樹脂組成物、及び、半導体装置を製造する方法 - Google Patents
硬化性樹脂フィルム、半導体装置製造用フィルム材、半導体装置製造用硬化性樹脂組成物、及び、半導体装置を製造する方法 Download PDFInfo
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- WO2022118969A1 WO2022118969A1 PCT/JP2021/044553 JP2021044553W WO2022118969A1 WO 2022118969 A1 WO2022118969 A1 WO 2022118969A1 JP 2021044553 W JP2021044553 W JP 2021044553W WO 2022118969 A1 WO2022118969 A1 WO 2022118969A1
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- curable resin
- resin film
- carrier
- protective layer
- semiconductor device
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- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/18—High density interconnect [HDI] connectors; Manufacturing methods related thereto
- H01L2224/20—Structure, shape, material or disposition of high density interconnect preforms
- H01L2224/21—Structure, shape, material or disposition of high density interconnect preforms of an individual HDI interconnect
- H01L2224/214—Connecting portions
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- H01L2224/93—Batch processes
- H01L2224/95—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips
- H01L2224/95001—Batch processes at chip-level, i.e. with connecting carried out on a plurality of singulated devices, i.e. on diced chips involving a temporary auxiliary member not forming part of the bonding apparatus, e.g. removable or sacrificial coating, film or substrate
Definitions
- the present disclosure relates to a curable resin film, a film material for manufacturing a semiconductor device, a curable resin composition for manufacturing a semiconductor device, and a method for manufacturing a semiconductor device.
- a method of manufacturing a semiconductor device such as a fan-out package may include steps such as processing a semiconductor chip and forming a rewiring layer (RDL), in which the semiconductor chip tentatively attaches to a carrier. It may be done in a fixed state.
- RDL rewiring layer
- the present disclosure relates to a method for efficiently manufacturing a semiconductor device by a method including temporarily fixing a semiconductor chip to a carrier, and a curable resin film used for that purpose.
- the present disclosure relates to a tackable curable resin film used for manufacturing a semiconductor device.
- the curable resin film exhibits a transmittance of 20% or less with respect to light having a wavelength of 355 nm.
- the semiconductor device forms a temporary fixed laminate including a carrier and a sealing structure including a plurality of semiconductor chips and a sealing portion for sealing the plurality of semiconductor chips, and the temporary fixed laminate. Manufactured by methods comprising removing said carriers from.
- the semiconductor chip has a chip main body portion having a first surface and a second surface on the opposite side thereof, and a connection terminal provided on the first surface.
- the sealing portion has an integral protective layer that covers the second surface of the plurality of semiconductor chips, and a sealing material layer that seals the plurality of semiconductor chips together with the protective layer.
- the protective layer is the cured curable resin film.
- the temporary fixed laminate is formed by a method including laminating the curable resin film and the carrier. By separating the protective layer from the carrier, the carrier is removed from the temporary fixed laminate.
- Another aspect of the present disclosure relates to a film material for manufacturing a semiconductor device, comprising a support film and the curable resin film provided on the support film.
- Yet another aspect of the present disclosure relates to a curable resin composition for manufacturing semiconductor devices, which contains a light absorber and is used for forming the curable resin film.
- Yet another aspect of the present disclosure relates to a method of manufacturing a semiconductor device by the above method.
- a semiconductor device can be efficiently manufactured by a method including temporarily fixing a semiconductor chip to a carrier.
- FIG. 1 It is sectional drawing which shows one Embodiment of the film material which has a curable resin film. It is sectional drawing which shows one Embodiment of a semiconductor device.
- (A), (b), (c) and (d) are process charts showing an embodiment of a method for manufacturing a semiconductor device.
- (A), (b), (c) and (d) are process charts showing an embodiment of a method for manufacturing a semiconductor device.
- (A), (b), (c) and (d) are process charts showing an embodiment of a method for manufacturing a semiconductor device.
- (A), (b), (c) and (d) are process charts showing an embodiment of a method for manufacturing a semiconductor device.
- (A), (b), (c), (d) and (e) are process charts showing an embodiment of a method for manufacturing a semiconductor device.
- (A), (b), (c), (d) and (e) are process charts showing an embodiment of a method for manufacturing a semiconductor device. It is an ultraviolet-visible absorption spectrum of a curable resin film.
- FIG. 1 is a cross-sectional view showing an embodiment of a film material having a curable resin film.
- the film material 5 shown in FIG. 1 includes a support film 3A, a curable resin film 22 provided on the support film 3A, and a protective film 3B covering the surface of the curable resin film 22 opposite to the support film 3A. And have.
- the curable resin film 22 may have tackiness.
- the curable resin film 22 may have a tack property such that it can be attached to a glass substrate in an environment of 25 ° C.
- the tackable curable resin film 22 can be bonded to a carrier described later at room temperature or relatively low temperature conditions. Further, the semiconductor chip can be arranged at a predetermined position on the curable resin film 22 at a relatively low temperature.
- the 90 degree peel strength between the curable resin film 22 and the glass substrate is 10 N / m or more and 20 N / at 25 ° C. It may be m or more, 30 N / m or more, 40 N / m or more, or 200 N / m or less.
- the "temperature condition of 25 ° C.” means a condition in which the temperature of the curable resin film 22 and the glass substrate is 25 ° C.
- the adhesive strength of the glass may be 5 MPa or less.
- the curable resin film 22 can be a film having low light transmission. Specifically, the transmittance of the curable resin film 22 with respect to light having a wavelength of 355 nm after curing is 20% or less, 15% or less, 10% or less, 9% or less, 8% or less, 7% or less, 6% or less. It may be 5% or less, 4% or less, 3% or less, 2% or less, 1% or less, 0.5% or less, or 0% or more. Since the curable resin film 22 having low light transmission efficiently absorbs light, it can be easily separated from the carrier by irradiation with light (for example, a laser).
- light for example, a laser
- the transmittance here means the ratio of the intensity of transmitted light to the intensity of incident light when light having a predetermined wavelength is incident on the curable resin film 22 from one main surface side.
- the light transmittance of the curable resin film 22 before curing with respect to light having a wavelength of 355 nm is 20% or less, 15% or less, 10% or less, 9% or less, 8% or less, 7% or less, 6% or less, 5% or less. It may be 4% or less, 3% or less, 2% or less, 1% or less, 0.5% or less, or 0% or more.
- the shear viscosity of the curable resin film 22 may be 5000 Pa ⁇ s or more, 6000 Pa ⁇ s or more, 7000 Pa ⁇ s or more, or 8000 Pa ⁇ s or more at 100 ° C., 100,000 Pa ⁇ s or less, 90,000 Pa ⁇ s or less, or It may be 80,000 Pa ⁇ s or less.
- the shear viscosity of the curable resin film 22 is within this range, it is particularly easy to obtain a sufficient effect of holding the adherend.
- the storage elastic modulus of the curable resin film 22 after curing may be 300 MPa or more, 400 MPa or more or 500 MPa or more at 25 ° C., or 6000 MPa or less, 5500 MPa or less or 5000 MPa or less.
- the storage elastic modulus of the curable resin film 22 after curing may be 0.1 MPa or more, 0.5 MPa or more, or 1.0 MPa or more at 250 ° C., 200 MPa or less, 190 MPa or less, 180 MPa or less, 170 MPa or less, It may be 160 MPa or less, 150 MPa or less, 140 MPa or less, 130 MPa or less, or 120 MPa or less. When the storage elastic modulus of the curable resin film 22 after curing is within these ranges, a sufficient effect of protecting the semiconductor element can be obtained.
- the curable resin film 22 may contain a light absorber.
- a curable resin film containing a light absorber can easily have sufficiently low light transmittance.
- the light absorber may be a material that absorbs laser light and generates heat.
- the light absorber may be a black pigment or dye. Specific examples of the light absorber include carbon black, aluminum, nickel, and titanium oxide.
- the content of the light absorber can be, for example, in the range where the transmittance of the curable resin film 22 with respect to light having a wavelength of 355 nm is 20% or less.
- the content of the light absorber may be 0.1% by mass or more or 1% by mass or more based on the mass of the curable resin film 22, and is 30% by mass or less, 25% by mass or less, It may be 20% by mass or less, 15% by mass or less, 10% by mass or less, or 5% by mass or less.
- the curable resin film 22 may contain a thermoplastic resin.
- the curable resin film 22 containing a thermoplastic resin having a low glass transition temperature tends to form a semiconductor device in which warpage is suppressed.
- the glass transition temperature of the thermoplastic resin may be ⁇ 40 ° C. or higher and 40 ° C. or lower or 30 ° C. or lower, or ⁇ 30 ° C. or higher and 40 ° C. or lower or 30 ° C. or lower.
- the glass transition temperature of the thermoplastic resin is 40 ° C. or lower or 30 ° C. or lower
- the curable resin film tends to have appropriate flexibility and adhesiveness to the adherend.
- the glass transition temperature of the thermoplastic resin film is ⁇ 40 ° C. or higher or ⁇ 30 ° C. or higher, the uncured curable resin film tends to have appropriate tackiness and handleability.
- the thermoplastic resin may have a reactive group.
- the reactive group of the thermoplastic resin may be, for example, an epoxy group. Since the epoxy group is relatively difficult to proceed with the cross-linking reaction, the gelation of the varnish for forming the thermosetting resin film and the unintentional increase in the degree of curing of the curable resin film are caused to the adherend. There is a tendency to suppress a decrease in adhesive strength.
- the thermoplastic resin may be a (meth) acrylic copolymer or a (meth) acrylic copolymer having a reactive group.
- (meth) acrylic is used as a term to mean acrylic or methacrylic. Other similar terms are interpreted in the same way.
- the (meth) acrylic copolymer is a copolymer containing a (meth) acrylic monomer having a (meth) acryloyl group as a monomer unit.
- the (meth) acrylic copolymer forms a homopolymer having a glass transition temperature of 50 ° C. or higher, and a (meth) acrylic monomer forming a homopolymer having a glass transition temperature of 0 ° C. or lower.
- a copolymer containing a (meth) acrylic monomer having an epoxy group as a monomer unit may be used.
- the glass transition temperature of homopolymers formed by (meth) acrylic monomers with epoxy groups is not limited.
- the (meth) acrylic monomer forming a homopolymer having a glass transition temperature of 50 ° C. or higher and the (meth) acrylic monomer forming a homopolymer having a glass transition temperature of 0 ° C. or lower are monomers having no epoxy group. There can be.
- the weight average molecular weight of the thermoplastic resin may be 200,000 or more and 1,000,000 or less.
- the weight average molecular weight here can be a standard polystyrene equivalent value measured by gel permeation chromatography.
- the curable resin film tends to be stably formed, and the curable resin film tends to have appropriate strength, flexibility and tackiness. Tend. Further, the curable resin film tends to have excellent handleability and heat resistance. Further, when the weight average molecular weight of the thermoplastic resin is 1,000,000 or less, appropriate fluidity can be easily obtained.
- the content of the thermoplastic resin may be 10 to 80% by mass based on the mass of the curable resin film 22.
- the content of the thermoplastic resin is 10% by mass or more, the handleability of the curable resin film at a high temperature tends to be improved.
- the content of the thermoplastic resin is 80% by mass or less, the curable resin film after curing tends to have a moderately large elastic modulus, whereby high reliability can be easily obtained.
- the curable resin film 22 may further contain a curable resin which is a compound having a reactive group.
- the curable resin may be an epoxy resin having two or more epoxy groups, and examples thereof include bisphenol A type epoxy resin, bisphenol F type epoxy resin, phenol novolac type epoxy resin, and cresol novolac type epoxy resin. Can be mentioned. Two or more kinds of epoxy resins selected from these may be used together. The molecular weight of the curable resin may be 3000 or less.
- the curable resin film 22 containing a curable resin has curability and tends to have an appropriate tack property.
- the content of the curable resin may be 1% by mass or more and 50% by mass or less, or 40% by mass or less based on the mass of the curable resin film 22, and 5% by mass or more and 50% by mass or less or. It may be 40% by mass or less.
- the content of the curable resin is within these ranges, the semiconductor device is particularly likely to be stably and efficiently manufactured.
- the content of the curable resin is 1% by mass or more or 5% by mass or more, the adhesive strength of the curable resin film to the semiconductor chip is improved, and as a result, the reliability of the manufactured semiconductor device tends to be improved. It is in.
- the content of the curable resin is 50% by mass or less or 40% by mass, the excessive flow of the curable resin film tends to be more suppressed.
- the curable resin film 22 may further contain a silica filler.
- the content of the silica filler may be 1 to 60% by mass or 5 to 60% by mass based on the mass of the curable resin film 22.
- the protective layer formed by curing the curable resin film 22 containing the silica filler can be particularly easily engraved on the surface thereof by irradiation with a laser beam.
- the content of the silica filler is 60% by weight or less, the curable resin film after curing tends to have an appropriate storage elastic modulus, and particularly good adhesiveness is likely to be exhibited.
- the curable resin film 22 may further contain a reactive group of a thermoplastic resin, a reactive group of a curable resin, or a curing agent that reacts with both of them.
- the curing agent may be, for example, a phenol resin.
- the curable resin film 22 may further contain a curing accelerator that accelerates the reaction of the curing agent.
- the curing accelerator may be an imidazole compound.
- the curable resin film 22 does not have to contain substantially a silicone compound having a polysiloxane chain.
- a curable resin film containing no silicone compound tends to have good adhesiveness to a semiconductor chip after curing.
- the content of the silicone compound may be less than 1.0 part by mass, less than 0.9 part by mass, or less than 0.8 part by mass with respect to 100 parts by mass of the thermoplastic resin.
- the thickness of the curable resin film 22 may be, for example, 10 to 400 ⁇ m.
- the support film 3A and the protective film 3B may be a thermoplastic resin film such as a polyethylene terephthalate film.
- the thickness of the support film 3A and the protective film 3B may be 10 to 150 ⁇ m.
- a varnish containing a curable resin composition containing the above-mentioned components constituting the curable resin film 22 and a solvent is applied to the support film 3A, and a solvent is applied from the coating film on the support film 3A. It can be obtained by a method including forming a curable resin film 22 by removing the film 22 and laminating a protective film 3B on a surface of the curable resin film 22 opposite to the support film 3A.
- the film material and the curable resin film exemplified above form a temporary fixed laminate having a carrier and a sealing structure provided on the main surface of the carrier, and remove the carrier from the temporary fixed laminate. It can be used to manufacture a semiconductor device by a method including the above.
- FIG. 2 is a cross-sectional view schematically showing an example of a semiconductor device that can be manufactured by using the curable resin film 22.
- the semiconductor device 1 shown in FIG. 2 is a device having a fan-out package (FO-PKG) structure, and includes a semiconductor chip 10, a sealing portion 15 for sealing the semiconductor chip 10, a rewiring layer 13, and solder. It is equipped with a ball 14.
- the semiconductor chip 10 has a chip main body portion 10a having a first surface S1 and a second surface S2 on the opposite side thereof, and a connection terminal 10b provided on the first surface S1.
- the rewiring layer 13 is a layer for widening the terminal pitch of the connection terminals 10b, and includes, for example, an insulating layer 13a including polyimide and the like, and wiring 13b such as copper wiring.
- the terminal pitch of the connection terminal 10b is widened by the pitch conversion by the rewiring layer 13.
- the solder ball 14 is connected to a terminal whose terminal pitch is widened by the rewiring layer 13.
- the sealing portion 15 has a sealing material layer 11 that covers a portion of the surface of the semiconductor chip 10 other than the second surface S2, and a protective layer 12 that covers the second surface S2, and is on the rewiring layer 13.
- the semiconductor chip 10 is sealed with.
- the protective layer 12 can be a cured product of the curable resin film 22 according to the above-described embodiment.
- the surface S3 of the encapsulant layer 11 opposite to the rewiring layer 13 forms a flat surface together with the second surface S2 of the semiconductor chip 10, and the protective layer 12 extends so as to cover the entire flat surface. is doing.
- the protective layer 12 can be a permanent film constituting the semiconductor device without being removed after the semiconductor device is manufactured.
- FIGS. 3, 4 and 5 are process diagrams showing an example of a method for manufacturing the semiconductor device 1.
- the methods shown in FIGS. 3 to 5 are to form a temporary fixed laminated body 45 (FIG. 3 (d)) including the carrier 20 and the sealing structure 40 provided on the main surface of the carrier 20. Includes removing the carrier 20 from the fixed laminate 45.
- the temporary fixed laminate 45 is formed by bonding the curable resin film 22 and the carrier 20 to each other and on the opposite side of the curable resin film 22 from the carrier 20.
- a plurality of semiconductor chips 10 are arranged on the surface so that the second surface S2 is in contact with the curable resin film 22, and the curable resin film 22 is cured to protect the curable resin film.
- the layer 12 is formed and a plurality of semiconductor chips 10 are fixed on the protective layer 12, and the encapsulant layer 11 is formed on the protective layer 12 and the semiconductor chip 10, whereby the protective layer 12 and the encapsulant are formed. It can be formed by a method including forming a sealing portion 15 having a layer 11.
- the protective film 3B may be peeled off from the film material 5 exemplified in FIG. 1, the exposed curable resin film 22 may be attached to the carrier 20, and then the support film 3A may be peeled off from the curable resin film 22.
- the curable resin film 22 and the carrier 20 may be bonded together under temperature conditions of 20 to 120 ° C.
- the "temperature condition of 20 to 120 ° C.” means a condition in which the temperature of the curable resin film 22 and the carrier 20 is within the range of 20 to 120 ° C. This temperature condition may be 40 to 100 ° C.
- the laminate of the curable resin film 22 and the carrier 20 may be pressed for bonding, and the pressure for that may be, for example, 0.01 to 1 MPa.
- the carrier 20 may be, for example, a glass substrate or a transparent resin substrate.
- the thickness of the carrier 20 may be, for example, 0.1 to 2.0 mm.
- a plurality of semiconductor chips 10 are arranged at predetermined positions on the curable resin film 22 bonded to the carrier 20 in a direction in which the second surface S2 is in contact with the curable resin film 22, that is, in a face-up direction.
- the semiconductor chip 10 may be placed on the curable resin film 22 while heating the curable resin film 22, the semiconductor chip 10, or both of them.
- the heating temperature may be, for example, 20 to 120 ° C. or 60 to 100 ° C.
- the semiconductor chip 10 placed on the curable resin film 22 may be pressurized, and the pressure for that may be 0.01 to 1.0 MPa or 0.1 to 0.2 MPa.
- the pressurization time may be, for example, 0.01 to 10 seconds or 0.1 to 2 seconds.
- the curable resin film 22 is cured by at least one of heat and light, and an integral protective layer covering the second surface S2 of all the plurality of semiconductor chips 10. 12 (cured curable resin film) is formed.
- the semiconductor chip 10 is fixed to the carrier 20 via the formed protective layer 12.
- the adhesive strength between the protective layer 12 and the carrier 20 at this point may be 1 MPa or more.
- a sealing material layer 11 for collectively sealing a plurality of semiconductor chips 10 is formed on the protective layer 12.
- the encapsulant layer 11 can be formed by using an encapsulant commonly used for encapsulating a semiconductor chip.
- the encapsulant may be a thermosetting resin composition containing an epoxy resin.
- the semiconductor chip 10 is included in the sealing portion 15 composed of the sealing material layer 11 and the protective layer 12.
- the encapsulant layer 11 is formed by a usual method such as a compression molding method. Since the semiconductor chip 10 is fixed to the protective layer 12, the position of the semiconductor chip 10 is unlikely to shift while the encapsulant layer 11 is formed.
- a part of the encapsulant layer 11 is removed by polishing from the side opposite to the protective layer 12, and the connection terminal 10b is exposed.
- the rewiring layer 13 having the wiring 13b connected to the exposed connection terminal 10b and the insulating layer 13a is formed on the encapsulant layer 11, and the encapsulant layer 11 of the rewiring layer 13 is formed. Is to provide a solder ball 14 connected to the wiring 13b on the opposite surface, and to irradiate the protective layer 12 with light L from the carrier 20 side, thereby separating the protective layer 12 from the carrier 20.
- the sealing structure 40 including the plurality of semiconductor chips 10 is divided on the dicing tape 50 to form the individualized semiconductor device 1, and the semiconductor device 1 is picked up from the dicing tape 50. May be further included.
- the sealing structure having the semiconductor chip 10 and the sealing material layer 11 and not provided with the protective layer 12 is not supported by a carrier or the like, the interface between the semiconductor chip 10 and the sealing material layer 11 is peeled off, etc. May cause damage such as cracking.
- the protective layer 12 damage to the sealing structure separated from the carrier during the manufacturing process can be suppressed.
- the protective layer 12 can be polished, the rewiring layer 13 can be formed, and the solder balls can be formed by ordinary methods.
- the light L for separating the protective layer 12 from the carrier 20 may be, for example, laser light.
- the light source of the laser beam may be, for example, an excimer laser.
- the wavelength of the laser beam generated from the excimer laser can be, for example, 193 nm, 248 nm, 308 nm, 351 nm or 532 nm.
- the surface of the protective layer 12 is altered by the irradiation of the laser beam, and as a result, the adhesive force between the protective layer 12 and the carrier 20 is reduced.
- the adhesive force between the protective layer 12 (cured curable resin film) and the carrier 20 (for example, a glass substrate) after laser irradiation may be 5.0 MPa or less.
- a laser beam for example, a green laser
- necessary information such as a product name may be engraved on the surface of the protective layer 12 opposite to the semiconductor chip 10.
- the surface of the exposed protective layer 12 may be cleaned if necessary.
- the dicing tape 50 is attached to the protective layer 12, and the sealing portion including the plurality of semiconductor chips 10 and the protective layer 12 is included.
- the sealing structure 40 including 15, the rewiring layer 13, and the solder ball 14 is cut at a predetermined position S to form a plurality of semiconductor devices 1, and the semiconductor device 1 is cut from the dicing tape 50. It may include picking up.
- FIGS. 6 to 8 are process diagrams showing another example of the method for manufacturing the semiconductor device 1.
- the methods shown in FIGS. 6 to 8 are to form a temporary fixed laminated body 45 (FIG. 7 (e)) including the carrier 20 and the sealing structure 40 provided on the main surface of the carrier 20. Includes removing the carrier 20 from the fixed laminate 45.
- the temporary fixing laminate 45 has a carrier 30 and a temporary fixing layer 32 provided on the carrier 30.
- the material 35 is prepared, and a plurality of semiconductor chips 10 having a chip main body portion 10a having a first surface S1 and a second surface S2 on the opposite side thereof and a connection terminal 10b provided on the second surface S2 are prepared.
- Temporary fixed laminate 45 (FIG. 6 (c)), which has a sealing material layer 11 that collectively seals on 35, and the second surface S2 of a plurality of semiconductor chips 10 is exposed from the sealing material layer 11. )) Is formed, a curable resin film 22 covering the second surface S2 and the encapsulant layer 11 is provided, the curable resin film 22 and the carrier 20 are bonded together, and the temporary fixed laminate 45 is formed. It can be formed by a method further including removing the temporary fixing material 35 from the above in this order.
- the carrier 30 constituting the temporary fixing material 35 may be, for example, a glass substrate.
- the adhesive layer 32 constituting the temporary fixing material 35 may be, for example, a release sheet having an adhesive force at room temperature and having an adhesive force decreasing by heating.
- the plurality of semiconductor chips 10 are adhered to each other in the direction in which the first surface S1 and the connection terminal 10b are located on the adhesive layer 32 side of the temporary fixing material 35, that is, in the face-down direction. Arranged on layer 32.
- the encapsulant layer 11 for encapsulating the semiconductor chip 10 is formed.
- the encapsulant layer 11 is formed so that the second surface S2 of the semiconductor chip 10 is exposed from the encapsulant layer 11.
- the encapsulant layer 11 in which the entire semiconductor chip 10 including the second surface S2 is embedded is formed, and then a part of the encapsulant layer 11 is removed by polishing from the side opposite to the temporary fixing material 35, whereby the encapsulant layer 11 is formed.
- a flat surface on which the second surface S2 of the semiconductor chip 10 is exposed may be formed.
- the temporary fixing laminate 45 at this stage is composed of a temporary fixing material 35, a plurality of semiconductor chips 10, and a sealing material layer 11.
- a curable resin film 22 covering the second surface S2 of the semiconductor chip 10 and the encapsulant layer 11 is provided, and the curing is performed as shown in FIG. 7A.
- the sex resin film 22 and the carrier 20 are bonded together.
- the bonding conditions can be the same as the conditions in the method illustrated in FIG.
- the curable resin film 22 bonded to the carrier 20 may be cured to form an integral protective layer 12 (cured curable resin film) that covers the second surface S2 of all of the plurality of semiconductor chips 10. ..
- the protective layer 12 and the sealing material layer 11 form a sealing portion 15 for sealing the semiconductor chip 10 on the temporary fixing material 35.
- the sealing structure 40 has a semiconductor chip 10 and a sealing portion 15.
- the temporary fixing laminate 45 at this stage is composed of the temporary fixing material 35, the sealing structure 40, and the carrier 20.
- the temporary fixing material 35 is removed from the temporary fixing laminate 45.
- the adhesive layer 32 may be heated to separate the sealing structure 40 from the adhesive layer 32 whose adhesive strength has been reduced by heating.
- the rewiring layer 13 is formed on the exposed first surface S1.
- the rewiring layer 13 has an insulating layer 13a and wirings 13b such as copper wiring provided in the insulating layer 13a.
- a solder ball 14 is provided on the rewiring layer 13.
- the carrier 20 is removed from the temporary fixed laminate 45 composed of the carrier 20 and the sealing structure 40 as shown in FIG. 8 (a).
- the method for removing the carrier 20 can be a method including irradiating the temporary fixed laminate 45 with light from the carrier 20 side, similar to the method exemplified in FIG.
- the remaining sealing structure 40 is formed by attaching the dicing tape 50 to the protective layer 12 and a plurality of semiconductor chips 10 as shown in FIGS. 8 (b) to 8 (e). ,
- the sealing structure 40 including the sealing portion 15, the rewiring layer 13, and the solder ball 14 is cut at a predetermined position S to form a plurality of semiconductor devices 1, and the semiconductor device 1 is diced with a dicing tape 50. Divided by methods including picking up from. By dividing the sealing structure 40, a semiconductor device 1 that has been made into individual pieces can be obtained.
- the cured resin film has a function of fixing the semiconductor chip during various steps such as forming a sealing material layer, thinning the semiconductor chip, and forming a rewiring layer, and sealing the semiconductor chip. It is used both for its function as a material that constitutes a part of the sealing part to be stopped. Therefore, the method according to the present disclosure can greatly simplify the manufacturing process as compared with the case where different materials are used properly for each function.
- Each varnish was applied to the support film and the coating film was dried to form curable resin films 1 to 7 having a thickness of 20 ⁇ m on the support film.
- a protective film was placed on the curable resin film to obtain a film material composed of a support film, any of the curable resin films 1 to 7, and a protective film.
- Storage elastic modulus A plurality of curable resin films were laminated to prepare a laminated film having a thickness of about 240 ⁇ m.
- the curable resin film was cured by heating the laminated film at 130 ° C. for 20 minutes followed by heating at 170 ° C. for 2 hours.
- the dynamic viscoelasticity of the obtained cured product was measured in the range of ⁇ 80 to 300 ° C. under the following conditions using a dynamic viscoelasticity measuring device (Rheogel-E4000 manufactured by UBM). Sample size: 4 mm x 30 mm
- Tension mode frequency 10Hz
- Temperature rise rate 3 ° C./min From the obtained measurement results, the storage elastic modulus of the curable resin film after curing at 25 ° C. or 250 ° C. was determined. Table 2 shows the measurement results of shear viscosity and storage elastic modulus.
- Tackiness (90 degree peel strength)
- the curable resin film was attached to the mirror wafer or the glass substrate in an environment of 25 ° C. or while heating at 70 ° C. A pressure of 0.2 MPa was applied to the curable resin film for bonding.
- the curable resin film attached to the mirror wafer or the glass substrate was allowed to stand for 2 hours after the support tape (Oji Tape) was attached onto the curable resin film.
- the 90-degree peel strength was measured by a peeling test in which the curable resin film was peeled off in the direction of 90 degrees with respect to the main surface of the mirror wafer or the glass substrate.
- the peeling speed was 50 mm / sec. The measurement results are shown in Table 3.
- FIG. 9 is an ultraviolet-visible absorption spectrum of the curable resin films of Examples 1 and 2, and is shown here as a relative value based on the transmittance for light having a wavelength of 600 nm.
- FIG. 9 also shows the ultraviolet-visible absorption spectrum of the glass substrate.
- the curable resin film of Example 1 showed a transmittance (relative value) of 1.01% with respect to light having a wavelength of 355 nm.
- the curable resin film of Example 2 showed a transmittance of 4.76% (relative value) with respect to light having a wavelength of 355 nm.
- the protective film is peeled off from the film material of Example 1 or 2, the exposed curable resin film is placed on a glass substrate (60 mm ⁇ 60 mm, thickness 0.7 mm), and the curable resin film and the glass substrate are evacuated. It was pasted together by a laminator.
- the conditions of the vacuum laminator were set to a temperature of 90 ° C., a pressure of 0.5 MPa, and a pressurization time of 60 seconds.
- the curable resin film was cured by heating at 130 ° C. for 20 minutes followed by heating at 170 ° C. for 2 hours.
- a sealing material layer was formed on the protective layer, which was a cured curable resin film, at 150 ° C. for 300 seconds using a sealing material containing an epoxy resin.
- the formed encapsulant layer was further cured by heating at 150 ° C. for 6 hours.
- an evaluation laminate having a three-layer structure composed of a glass substrate, a protective layer and a sealing material layer was obtained.
- the evaluation laminate was irradiated with UV laser light having a frequency of 55 kHz and an output of 316 mW from the glass substrate side.
- the glass substrate was naturally peeled off from the protective layer after irradiation with the laser beam without requiring stress.
- the glass substrate was peeled off from the protective layer by inserting a razor at the interface.
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Abstract
Description
以下の原料を準備した。
熱可塑性樹脂
・エポキシ基を有するアクリルポリマー(ガラス転移温度:12℃、重量平均分子量:80万)
エポキシ樹脂
・ビスフェノールF型液状エポキシ樹脂:YDF-8170C(商品名、日鉄ケミカル&マテリアル株式会社)
・クレゾールノボラック型エポキシ樹脂:N-500P-10(商品名、DIC株式会社)
硬化剤
・フェノール樹脂:PSM-4326(商品名、群栄化学工業株式会社)
・フェノール樹脂:MEH-7800M(商品名、明和化成株式会社)
シリカフィラー
・SC2050-HLG(商品名、アドマテックス株式会社)
・R972(商品名、日本アエロジル株式会社)
光吸収剤
・カーボンブラック:FP-Black(商品名、山陽色素株式会社、30質量%のカーボンブラックを含む分散液)
カップリング剤
・(3-メルカプトプロピル)トリメトキシシラン:A-189(商品名、モメンティブ社)
・3-ウレイドプロピルトリエトキシシラン:A-1160(商品名、モメンティブ社)
・ウレイドプロピルトリアルコキシシラン:Z-6119(商品名、ダウ・ケミカル日本社)
硬化促進剤
・1-シアノエチル-2-フェニルイミダゾール:2PZ-CN(商品名、四国化成工業株式会社)
表1に示す配合比で各原料を含み、溶剤としてシクロヘキサノンを含む、硬化性樹脂フィルム1~7を形成するための樹脂ワニスを調製した。樹脂ワニスにおける溶剤以外の成分の合計濃度は、ワニスの質量を基準として40質量%であった。
ずり粘度
複数の硬化性樹脂フィルムを積層して、厚さ1280μmの積層フィルムを試験片として準備した。試験片の動的粘弾性を、ずり粘度測定装置(ティー・エー・インスツルメンツ社製、ARES-G2)を用いて、以下の条件で35~130℃の範囲で測定した。
荷重:100g
周波数:1Hz
ひずみ量:5%
得られた測定結果から硬化性樹脂フィルムの100℃におけるずり粘度を測定した。
複数の硬化性樹脂フィルムを積層して、厚さ約240μmの積層フィルムを準備した。積層フィルムを130℃で20分とそれに続く170℃で2時間の加熱することにより、硬化性樹脂フィルムを硬化させた。得られた硬化物の動的粘弾性を、動的粘弾性測定装置(ユービーエム社製Rheogel-E4000)を用いて、以下の条件で-80~300℃の範囲で測定した。
サンプルサイズ:4mm×30mm
引張モード
周波数:10Hz
昇温速度:3℃/分
得られた測定結果から、硬化後の硬化性樹脂フィルムの25℃又は250℃における貯蔵弾性率を求めた。表2にずり粘度及び貯蔵弾性率の測定結果が示される。
硬化性樹脂フィルムをミラーウエハ、又はガラス基板に対して25℃の環境下で、又は、70℃に加熱しながら貼り合わせた。貼り合わせのために0.2MPaの圧力を硬化性樹脂フィルムに対して加えた。ミラーウエハ又はガラス基板に貼り合わせされた硬化性樹脂フィルムを、その上にサポートテープ(Oji Tape)を貼り付けてから2時間静置した。次いで、硬化性樹脂フィルムを、ミラーウエハ又はガラス基板の主面に対して90度の方向に引き剥がす剥離試験により、90度ピール強度を測定した。引き剥がしの速度は50mm/秒であった。測定結果が表3に示される。硬化性樹脂フィルムをミラーウエハ又はガラス基板に貼り合わせるための温度(貼り合わせ温度)が25℃である場合について、測定を2回実施した。表3に2回の測定値が示される。貼り合わせ温度が25℃である場合、測定値のばらつきがやや大きいが、10N/mを下回ることはなかった。実施例4に関して、硬化性樹脂フィルムをガラス基板に70℃で貼り合わせた場合、密着力が強すぎたために、硬化性樹脂フィルムを剥離することができず、剥離試験において90度ピール強度を測定できなかった。
実施例1~7の硬化性樹脂フィルム1~7の硬化後の紫外可視吸収を測定した。図9は実施例1及び2の硬化性樹脂フィルムの紫外可視吸収スペクトルであり、ここでは波長600nmの光に対する透過率を基準とする相対値で示されている。図9には、ガラス基板の紫外可視吸収スペクトルも示される。実施例1の硬化性樹脂フィルムは、波長355nmの光に対して1.01%の透過率(相対値)を示した。実施例2の硬化性樹脂フィルムは、波長355nmの光に対して4.76%(相対値)の透過率を示した。
実施例1又は2のフィルム材から保護フィルムを剥がし、露出した硬化性樹脂フィルムを、ガラス基板(60mm×60mm、厚さ0.7mm)に載せ、硬化性樹脂フィルムとガラス基板とを真空ラミネータによって貼り合わせた。真空ラミネータの条件は、温度90℃、圧力0.5MPa、加圧時間60秒に設定した。130℃で20分間の加熱とそれに続く170℃で2時間の加熱により硬化性樹脂フィルムを硬化させた。硬化した硬化性樹脂フィルムである保護層上に、エポキシ樹脂を含む封止材を用いて、150℃で300秒の条件で封止材層を形成した。形成された封止材層を150℃で6時間の加熱により更に硬化させた。これにより、ガラス基板、保護層及び封止材層から構成される3層構造の評価用積層体を得た。
Claims (27)
- 半導体装置を製造するために用いられる、タック性を有する硬化性樹脂フィルムであって、
硬化した当該硬化性樹脂フィルムが、波長355nmの光に対して20%以下の透過率を示し、
前記半導体装置が、
キャリア、及び、該キャリアの主面上に設けられ、複数の半導体チップと複数の前記半導体チップを封止する封止部とを含む封止構造体、を備える仮固定積層体を形成することと、
前記仮固定積層体から前記キャリアを除去することと、
を含む方法によって製造され、
前記半導体チップが、第1面及びその逆側の第2面を有するチップ本体部と、前記第1面上に設けられた接続端子と、を有し、
前記封止部が、複数の前記半導体チップの前記第2面を覆う一体的な保護層と、前記保護層とともに複数の前記半導体チップを封止する封止材層と、を有し、
前記保護層が、硬化した当該硬化性樹脂フィルムであり、
前記仮固定積層体が、当該硬化性樹脂フィルムと前記キャリアとを貼り合わせることを含む方法によって形成され、
前記保護層を前記キャリアから分離することにより、前記仮固定積層体から前記キャリアが除去される、硬化性樹脂フィルム。 - 前記保護層が前記半導体装置に設けられる永久膜である、請求項1に記載の硬化性樹脂フィルム。
- 前記半導体装置が、前記複数の半導体チップと前記保護層を含む封止部とを備える前記封止構造体を切断し、それにより複数の半導体装置を形成することを更に含む方法によって製造される、請求項1又は2に記載の硬化性樹脂フィルム。
- 前記半導体装置が、レーザ光の照射によって前記保護層の表面に刻印することを更に含む方法によって製造される、請求項1~3のいずれか一項に記載の硬化性樹脂フィルム。
- 当該硬化性樹脂フィルムが、25℃の温度条件でガラス基板に貼り合わせられたときに、当該硬化性樹脂フィルムと前記ガラス基板との間の90度ピール強度が、25℃において10N/m以上である、請求項1~4のいずれか一項に記載の硬化性樹脂フィルム。
- 前記仮固定積層体が、
前記キャリアに貼り合わせられた当該硬化性樹脂フィルムの前記キャリアとは反対側の面上に、複数の前記半導体チップを、前記第2面が当該硬化性樹脂フィルムに接する向きで配置することと、
当該硬化性樹脂フィルムを硬化することにより、複数の前記半導体チップを、硬化した当該硬化性樹脂フィルムである前記保護層上に固定することと、
前記封止材層を前記保護層上に形成し、それにより前記保護層及び前記封止材層を有する前記封止部を形成することと、
をこの順に更に含む方法によって形成される、請求項1~5のいずれか一項に記載の硬化性樹脂フィルム。 - 前記仮固定積層体が、
仮固定材、該仮固定材上に前記第1面が前記仮固定材側に向く向きで仮固定された複数の前記半導体チップ、及び、複数の前記半導体チップを前記仮固定材上で封止する前記封止材層を有し、前記封止材層から複数の前記半導体チップの前記第2面が露出している、仮固定積層体を形成することと、
前記第2面及び前記封止材層を覆う当該硬化性樹脂フィルムを設けることと、
当該硬化性樹脂フィルムを硬化して、前記保護層を形成することと、
前記仮固定積層体から前記仮固定材を除去することと、
をこの順に更に含む方法によって形成され、
前記第2面及び前記封止材層を覆う当該硬化性樹脂フィルムと前記キャリアとが貼り合わせられる、請求項1~5のいずれか一項に記載の硬化性樹脂フィルム。 - 光吸収剤を含む、請求項1~7のいずれか一項に記載の硬化性樹脂フィルム。
- 熱可塑性樹脂を含む、請求項1~8のいずれか一項に記載の硬化性樹脂フィルム。
- 前記熱可塑性樹脂のガラス転移温度が-40~40℃である、請求項9に記載の硬化性樹脂フィルム。
- シリカフィラーを含む、請求項1~10のいずれか一項に記載の硬化性樹脂フィルム。
- ポリシロキサン鎖を有するシリコーン化合物を実質的に含まない、請求項1~11のいずれか一項に記載の硬化性樹脂フィルム。
- 当該硬化性樹脂フィルムのずり粘度が、100℃において5000~100000Pa・sである、請求項1~12のいずれか一項に記載の硬化性樹脂フィルム。
- 当該硬化性樹脂フィルムの硬化後の貯蔵弾性率が、25℃において300~6000MPaで、250℃において0.1~200MPaである、請求項1~13のいずれか一項に記載の硬化性樹脂フィルム。
- 支持フィルムと、該支持フィルム上に設けられた、請求項1~14のいずれか一項に記載の硬化性樹脂フィルムと、を備える、半導体装置製造用フィルム材。
- 光吸収剤を含み、請求項1~8のいずれか一項に記載の硬化性樹脂フィルムを形成するために用いられる、半導体装置製造用硬化性樹脂組成物。
- キャリア、及び、該キャリアの主面上に設けられ、複数の半導体チップと複数の前記半導体チップを封止する封止部とを含む封止構造体、を備える仮固定積層体を形成することと、
前記仮固定積層体から前記キャリアを除去することと、
を含む、半導体装置を製造する方法であって、
前記半導体チップが、第1面及びその逆側の第2面を有するチップ本体部と、前記第1面上に設けられた接続端子と、を有し、
前記封止部が、複数の前記半導体チップの前記第2面を覆う一体的な保護層と、前記保護層とともに複数の前記半導体チップを封止する封止材層と、を有し、
前記保護層が、硬化した硬化性樹脂フィルムであり、
前記仮固定積層体が、前記硬化性樹脂フィルムと前記キャリアとを貼り合わせることを含む方法によって形成され、
前記保護層を前記キャリアから分離することにより、前記仮固定積層体から前記キャリアが除去され、
硬化した前記硬化性樹脂フィルムが、波長355nmの光に対して20%以下の透過率を示す、半導体装置を製造する方法。 - 前記保護層が前記半導体装置に設けられる永久膜である、請求項17に記載の方法。
- 当該方法が、前記複数の半導体チップと前記保護層を含む封止部とを備える前記封止構造体を切断し、それにより複数の半導体装置を形成することを更に含む、請求項17又は18に記載の方法。
- 当該方法が、レーザ光の照射によって前記保護層の表面に刻印することを更に含む、請求項17~19のいずれか一項に記載の方法。
- 前記仮固定積層体が、
前記キャリアに貼り合わせられた当該硬化性樹脂フィルムの前記キャリアとは反対側の面上に、複数の前記半導体チップを、前記第2面が当該硬化性樹脂フィルムに接する向きで配置することと、
当該硬化性樹脂フィルムを硬化することにより、複数の前記半導体チップを、硬化した前記硬化性樹脂フィルムである前記保護層上に固定することと、
前記封止材層を前記保護層上に形成し、それにより前記保護層及び前記封止材層を有する前記封止部を形成することと、
をこの順に更に含む方法によって形成される、請求項17~20のいずれか一項に記載の方法。 - 前記仮固定積層体が、
仮固定材、該仮固定材上に前記第1面が前記仮固定材側に向く向きで仮固定された複数の前記半導体チップ、及び、複数の前記半導体チップを前記仮固定材上で封止する前記封止材層を有し、前記封止材層から複数の前記半導体チップの前記第2面が露出している、仮固定積層体を形成することと、
前記第2面及び前記封止材層を覆う前記硬化性樹脂フィルムを設けることと、
前記硬化性樹脂フィルムを硬化して、前記保護層を形成することと、
前記仮固定積層体から前記仮固定材を除去することと、
をこの順に更に含む方法によって形成され、
前記第2面及び前記封止材層を覆う前記硬化性樹脂フィルムと前記キャリアとが貼り合わせられる、請求項17~20のいずれか一項に記載の方法。 - 前記硬化性樹脂フィルムが光吸収剤を含む、請求項17~22のいずれか一項に記載の方法。
- 前記硬化性樹脂フィルムが熱可塑性樹脂を含む、請求項17~22のいずれか一項に記載の方法。
- 前記熱可塑性樹脂のガラス転移温度が-40~40℃である、請求項24に記載の方法。
- 前記硬化性樹脂フィルムのずり粘度が、100℃において5000~100000Pa・sである、請求項17~25のいずれか一項に記載の方法。
- 前記硬化性樹脂フィルムの硬化後の貯蔵弾性率が、25℃において300~6000MPaで、250℃において0.1~200MPaである、請求項17~26のいずれか一項に記載の方法。
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- 2021-12-03 US US18/255,366 patent/US20240021443A1/en active Pending
- 2021-12-03 CN CN202180081350.3A patent/CN116547799A/zh active Pending
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Patent Citations (4)
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JP2006222164A (ja) * | 2005-02-08 | 2006-08-24 | Shinko Electric Ind Co Ltd | 半導体装置及びその製造方法 |
JP2013074184A (ja) * | 2011-09-28 | 2013-04-22 | Nitto Denko Corp | 半導体装置の製造方法 |
JP2018009138A (ja) * | 2016-07-05 | 2018-01-18 | 日立化成株式会社 | 仮固定用樹脂組成物、仮固定用樹脂フィルム及び仮固定用樹脂フィルムシート |
JP2020105276A (ja) * | 2018-12-26 | 2020-07-09 | 東京応化工業株式会社 | 接着剤組成物、積層体、積層体の製造方法、及び電子部品の製造方法 |
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KR20230117136A (ko) | 2023-08-07 |
JPWO2022118969A1 (ja) | 2022-06-09 |
TW202243143A (zh) | 2022-11-01 |
CN116547799A (zh) | 2023-08-04 |
US20240021443A1 (en) | 2024-01-18 |
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