WO2017078469A1 - 반도체 장치 및 반도체 장치의 제조 방법 - Google Patents
반도체 장치 및 반도체 장치의 제조 방법 Download PDFInfo
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- WO2017078469A1 WO2017078469A1 PCT/KR2016/012676 KR2016012676W WO2017078469A1 WO 2017078469 A1 WO2017078469 A1 WO 2017078469A1 KR 2016012676 W KR2016012676 W KR 2016012676W WO 2017078469 A1 WO2017078469 A1 WO 2017078469A1
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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
- H10W90/00—Package configurations
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- H10W70/00—Package substrates; Interposers; Redistribution layers [RDL]
- H10W70/40—Leadframes
- H10W70/411—Chip-supporting parts, e.g. die pads
- H10W70/417—Bonding materials between chips and die pads
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- H10W74/10—Encapsulations, e.g. protective coatings characterised by their shape or disposition
- H10W74/111—Encapsulations, e.g. protective coatings characterised by their shape or disposition the semiconductor body being completely enclosed
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- H10W72/073—Connecting or disconnecting of die-attach connectors
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- H10W72/073—Connecting or disconnecting of die-attach connectors
- H10W72/07331—Connecting techniques
- H10W72/07332—Compression bonding, e.g. thermocompression bonding
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- H10W72/073—Connecting or disconnecting of die-attach connectors
- H10W72/07331—Connecting techniques
- H10W72/07337—Connecting techniques using a polymer adhesive, e.g. an adhesive based on silicone or epoxy
- H10W72/07338—Connecting techniques using a polymer adhesive, e.g. an adhesive based on silicone or epoxy hardening the adhesive by curing, e.g. thermosetting
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- H10W72/075—Connecting or disconnecting of bond wires
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- H10W72/321—Structures or relative sizes of die-attach connectors
- H10W72/325—Die-attach connectors having a filler embedded in a matrix
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- H10W72/00—Interconnections or connectors in packages
- H10W72/30—Die-attach connectors
- H10W72/351—Materials of die-attach connectors
- H10W72/353—Materials of die-attach connectors not comprising solid metals or solid metalloids, e.g. ceramics
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- H10W72/00—Interconnections or connectors in packages
- H10W72/30—Die-attach connectors
- H10W72/351—Materials of die-attach connectors
- H10W72/353—Materials of die-attach connectors not comprising solid metals or solid metalloids, e.g. ceramics
- H10W72/354—Materials of die-attach connectors not comprising solid metals or solid metalloids, e.g. ceramics comprising polymers
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- H10W72/00—Interconnections or connectors in packages
- H10W72/50—Bond wires
- H10W72/551—Materials of bond wires
- H10W72/552—Materials of bond wires comprising metals or metalloids, e.g. silver
- H10W72/5522—Materials of bond wires comprising metals or metalloids, e.g. silver comprising gold [Au]
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- H10W72/00—Interconnections or connectors in packages
- H10W72/851—Dispositions of multiple connectors or interconnections
- H10W72/874—On different surfaces
- H10W72/884—Die-attach connectors and bond wires
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- H10W72/00—Interconnections or connectors in packages
- H10W72/90—Bond pads, in general
- H10W72/931—Shapes of bond pads
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- H10W74/00—Encapsulations, e.g. protective coatings
- H10W74/10—Encapsulations, e.g. protective coatings characterised by their shape or disposition
- H10W74/111—Encapsulations, e.g. protective coatings characterised by their shape or disposition the semiconductor body being completely enclosed
- H10W74/114—Encapsulations, e.g. protective coatings characterised by their shape or disposition the semiconductor body being completely enclosed by a substrate and the encapsulations
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- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/731—Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors
- H10W90/732—Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors between stacked chips
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- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/731—Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors
- H10W90/734—Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors between a chip and a stacked insulating package substrate, interposer or RDL
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- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/731—Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors
- H10W90/736—Package configurations characterised by the relative positions of pads or connectors relative to package parts of die-attach connectors between a chip and a stacked lead frame, conducting package substrate or heat sink
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- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/751—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires
- H10W90/754—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires between a chip and a stacked insulating package substrate, interposer or RDL
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- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W90/00—Package configurations
- H10W90/701—Package configurations characterised by the relative positions of pads or connectors relative to package parts
- H10W90/751—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires
- H10W90/756—Package configurations characterised by the relative positions of pads or connectors relative to package parts of bond wires between a chip and a stacked lead frame, conducting package substrate or heat sink
Definitions
- the present invention relates to a semiconductor device and a method for manufacturing the semiconductor device, and more particularly, even if excessive force is applied to some extent during the die bonding process or the wire bonding process, damage to the top semiconductor chip can be reduced, and wire bonding can be stably performed.
- the present invention relates to a semiconductor device capable of forming a semiconductor device and a method for manufacturing the semiconductor device. Background Art
- the manufacturing process of a semiconductor device includes a process of forming a fine pattern on the wafer and a process of polishing and packaging the wafer to meet the specifications of the final device.
- the packaging process includes a wafer inspection process for inspecting a defect of a semiconductor chip; A dicing step of cutting the wafer into separate chips; A die bonding process of attaching the separated chip to a circuit film (ci rcui t f i lm) or a mounting plate of a lead frame; A wire bonding process of connecting the chip pad provided on the semiconductor chip and the circuit pattern of the circuit film or the lead frame with electrical connection means such as wire; A molding step of wrapping the outside with an encapsulant to protect the internal circuit and other components of the semiconductor chip; Trim process for cutting the dam bar connecting the lead and the lead; Forming process of bending the lead into a desired shape; And a finished product inspection process for inspecting defects of the finished package.
- the dicing process is a process of manufacturing a plurality of individual chips separated from each other by grinding the back surface of the semiconductor wafer and cutting the semiconductor wafer along the dicing line between the chips. remind Through the dicing process, individual chips separated from each other from a semiconductor wafer on which a plurality of chips are formed are manufactured.
- the single or plural individual semiconductor chips thus prepared are attached to a substrate or the like by means of a die bonding film, and the circuit pattern of the chip pad and the circuit film or the lead frame provided on the semiconductor chips thus attached is a wire bonding process.
- an electrical connection means such as a wire.
- the present invention is to provide a semiconductor device and a method for manufacturing a semiconductor device that can reduce the damage of the semiconductor chip during the die bonding process or the wire bonding process, and can be stably wire bonded.
- the present invention is a substrate; A first semiconductor chip die bonded by a die bonding layer on the substrate; A second semiconductor chip die-bonded by a crab two-die bonding layer on the first semiconductor chip, wherein the crab two-die bonding layer overlaps with an area of the first semiconductor chip in a lower region of the second semiconductor chip.
- a semiconductor device which is formed in a shape of molding an unsupported region.
- the semiconductor device may further include one to five multi-bonded semiconductor chips between the substrate and the first die bonding layer.
- the first die bonding layer and the second die bonding layer may include an adhesive layer including an epoxy resin and a curing agent.
- the adhesive layer may be preferable that the viscosity before curing is less than 3000Pa s at 130 ° C.
- first and the second die-bonding layer has a thickness of 10 to 160um It may be desirable.
- the present invention comprises the steps of: die-bonding a Crab 1 semiconductor chip comprising a 1 die-bonding film on the substrate; And second die bonding at the bottom .
- a method of manufacturing a semiconductor device in which die bonding is performed in a form of molding an unsupported region.
- the method may further include die bonding 1 to 5 semiconductor chips on the substrate before the die bonding of the first semiconductor chip.
- the first and second die bonding films may include an adhesive layer including an epoxy resin and a curing agent.
- the adhesive layer may be preferably a viscosity of less than 3000Pa "s before curing at 130 ° C.
- the semiconductor device of the present invention even if excessive force is applied to some extent during the die bonding process or the wire bonding process, damage to the uppermost semiconductor chip can be prevented and wire bonding can be stably performed.
- the manufacturing method of the semiconductor device of this invention can manufacture such a semiconductor device by a simple method.
- FIG. 1 illustrates a semiconductor device according to an embodiment of the present invention by an orthogonal view method.
- FIG. 2 illustrates that wire bonding is applied to a semiconductor device according to an embodiment of the present invention.
- FIG 3 is a cross-sectional view of a semiconductor device according to an embodiment of the present invention.
- FIG. 4 is a cross-sectional view of a semiconductor device according to a comparative example of the present invention. will be.
- a semiconductor device of the present invention comprises a substrate; A first semiconductor chip die bonded by a first die bonding layer on the substrate; And a second semiconductor chip die-bonded by a two-die bonding layer on the first semiconductor chip, wherein the second die-bonding layer overlaps with an area of the first semiconductor chip among lower regions of the second semiconductor chip. It is formed in the form of molding the unsupported area.
- the method of manufacturing a semiconductor device of the present invention comprises the steps of: die-bonding a first semiconductor patch comprising a first die-bonding film on a substrate; And die bonding a second semiconductor chip including a second die bonding film on the first semiconductor chip, wherein the second die bonding film is formed in the second region of the lower region of the second semiconductor chip. Die-bonding is performed in the form of molding a region which does not overlap with the region of the semiconductor chip.
- terms such as first and second are used to describe various components, and the terms are used only for the purpose of distinguishing one component from other components.
- each layer or element when each layer or element is referred to as being formed “on” or “on” of each layer or element, it means that each layer or element is directly formed on each layer or element, or is It means that a layer or element can be additionally formed between each layer, the object, the substrate.
- the present invention allows for various changes and numerous embodiments, particular embodiments will be illustrated and described in detail below. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. Hereinafter, the present invention will be described in more detail.
- a substrate A first semiconductor chip die bonded by a first die bonding layer on the substrate; A second semiconductor chip die-bonded by a second die bonding layer on the first semiconductor chip, wherein the second die bonding layer overlaps with an area of the first semiconductor chip among lower regions of the second semiconductor chip.
- a semiconductor device which is formed in the form of molding an unsupported region.
- the region of the lower region of the second semiconductor chip that does not overlap with the region of the first semiconductor chip is the second semiconductor in the case where the first semiconductor chip and the second semiconductor chip are not stacked in a completely overlapping manner.
- the bottom of the chip protrudes out of the upper surface of the giant U semiconductor chip, it means an empty space between the protruding portion and the substrate.
- forming the non-overlapping region means that the second die bonding layer fills the empty space between the above-described protruding portion and the substrate.
- FIG. 1 illustrates a semiconductor device according to an embodiment of the present invention by an orthogonal view method.
- the semiconductor device of the present invention includes a substrate 100; A first semiconductor chip (200) die-bonded by a first die bonding layer (210) on the substrate; A second semiconductor chip 300 die-bonded by a second die bonding layer 310 on the first semiconductor chip, wherein the second die bonding layer 310 is formed in a lower region of the second semiconductor chip. It can be seen that the first semiconductor chip is formed in a shape of molding a region that does not overlap.
- a semiconductor chip attaches a die-bonding film to a lower portion of a semiconductor wafer, and partially or partially divides the semiconductor wafer into parts.
- the die-bonding film and the dicing film surface of the semiconductor wafer is irradiated with ultraviolet rays to lower the adhesion between the semiconductor wafer die-bonding film and the dicing film surface, and then manufactured by picking up individual chips separated by the division of the semiconductor wafer.
- These semiconductor chips are stacked in a plurality of layers by a die bonding film on a substrate, and the chip pads provided on each of the stacked semiconductor chips are connected to a circuit pattern of a circuit film or a lead frame through a wire bonding process. .
- the upper chip and the lower chip do not completely overlap in order to secure a space for connecting the circuit film or the circuit pattern of the substrate through the wire. Will be stacked.
- the inventors have confirmed that when the die bonding layer of the semiconductor wafer stacked on top is laminated in the form of molding a portion that does not overlap with the lower semiconductor chip as described above, it is possible to prevent damage to the chip. Was completed.
- FIG. 2 illustrates that wire bonding is applied to a semiconductor device according to an embodiment of the present invention.
- the stability of the uppermost semiconductor chip can be ensured. Therefore, when the wire 400 bonding process proceeds to this part, excessive force Even if it is applied, it is possible to prevent damage to the semiconductor chip and to prevent damage to the existing bonded wire due to the minute shaking of the chip due to the wire bonding vibration.
- the semiconductor device may further include one to five die bonded semiconductor chips between the substrate and the one die bonding layer. That is, not only a semiconductor device in which two semiconductor chips are stacked, but also a plurality of semiconductor chips stacked therein, a die-bonding layer of a semiconductor chirp stacked on the upper part may not partially overlap the semiconductor chirp below. It can be stacked in the form.
- the first die bonding layer and the second die bonding layer may include an adhesive layer including an epoxy resin and a curing agent, and the adhesive layer may be present in a cured form.
- the first and the second die bonding layer may be formed of the same or different components.
- the epoxy resin that can be used in the present invention may include a general epoxy resin for the adhesive known in the art, for example, containing two or more epoxy groups in the molecule, the weight average molecular weight of 100 to 2,000 epoxy Resin can be used.
- the epoxy resin as described above forms a hard crosslinked structure through a curing process, and may exhibit excellent adhesion, heat resistance, and mechanical strength.
- the epoxy resin which is 1,000. If the epoxy equivalent of an epoxy resin is less than 100, a crosslinking density may become high too much, and an adhesive film may show a hard property as a whole, and when it exceeds 1,000, there exists a possibility that heat resistance may fall.
- epoxy resins examples include bifunctional epoxy resins such as bisphenol A epoxy resins or bisphenol F epoxy resins; Or cresol novolac epoxy resin, phenol novolac epoxy resin, tetrafunctional epoxy resin, biphenyl type epoxy resin, triphenol methane type epoxy resin, alkyl modified triphenol methane type epoxy resin, naphthalene type epoxy resin, dicyclopentadiene Three or more functional groups such as epoxy resin or dicyclopentadiene-modified phenol epoxy resin
- the branch may include one kind or two or more kinds of polyfunctional epoxy resins, but is not limited thereto.
- the mixed resin of a bifunctional epoxy resin and a polyfunctional epoxy resin as said epoxy resin.
- polyfunctional epoxy resin means an epoxy resin having three or more functional groups. That is, in general, subfunctional epoxy resins have excellent flexibility and flowability at high temperatures, but are poor in heat resistance and curing rate, whereas multifunctional epoxy resins having three or more functional groups have high curing speed and excellent crosslink density. Heat resistance, but flexibility and flowability is poor.
- the second die bonding layer may be formed to mold a region that does not overlap with the region of the first semiconductor chip.
- the adhesive layer may further include a low elastic high molecular weight resin.
- the low elastic high molecular weight resin may serve to impart soft relaxation characteristics at high temperatures by forming soft segments in the adhesive.
- the high molecular weight resin it is blended with the epoxy resin without causing breakage during film formation, can exhibit viscoelasticity after formation of the cross-linked structure, if the compatibility with other components and excellent storage stability, Resin components can also be used.
- the specific kind of the low elastic high molecular weight resin is not particularly limited as long as the above characteristics are satisfied.
- polyimide, polyetherimide, polyesterimide, polyamide, polyether sulfone, polyether ketone, polyolefin, polyvinyl chloride, phenoxy, semi-acrylonitrile butadiene rubber or acrylic resin It may be used, or a mixture of two or more of these may be used, but the present invention is not necessarily limited thereto.
- Specific examples of the acrylic resin may include an acrylic copolymer including (meth) acrylic acid and derivatives thereof, and examples of (meth) acrylic acid and derivatives thereof include (meth) acrylic acid; methyl
- Alkyl (meth) acrylate containing a C1-C12 alkyl group such as (meth) acrylate or ethyl (meth) acrylate; (Meth) acrylonitrile or (meth) acrylamide; And other copolymerizable monomers.
- the acrylic resin may also include one or more functional groups such as glycidyl group, hydroxyl group, carboxyl group and amine group, and such functional group may be glycidyl (meth) acrylate, hydroxy (meth) acrylate, It can introduce
- functional groups such as glycidyl group, hydroxyl group, carboxyl group and amine group
- such functional group may be glycidyl (meth) acrylate, hydroxy (meth) acrylate, It can introduce
- the curing agent that can be included in the adhesive composition is not particularly limited as long as it can react with the epoxy resin and / or the low elastic high molecular weight resin to form a crosslinked structure.
- a curing agent capable of reacting simultaneously with the two components to form a crosslinked structure may be used.
- Such a curing agent may form crosslinked structures with the soft and hard segments in the adhesive, respectively, to improve heat resistance. By acting as a crosslinking agent of two segments at both interfaces, it is possible to improve the reliability of the semiconductor device.
- the adhesive composition described above may further include a filler for controlling handleability, heat resistance, and melt viscosity.
- the type of filler that can be used in the present invention is not particularly limited, and generally organic and inorganic fillers can be used, and preferably inorganic fillers can be used.
- the inorganic fillers include, but are not limited to, silica, alumina, carbon dioxide, magnesium hydroxide, aluminum oxide, talc, aluminum nitride, or the like, or two or more kinds thereof.
- suck an ionic impurity and improve reliability can also be used as an inorganic filler.
- Such ion adsorbents include, but are not particularly limited to, magnesium-based compounds including magnesium hydroxide, magnesium carbonate, magnesium silicate, magnesium oxide, magnesium oxide, calcium silicate, calcium carbonate, chame oxide, etc. , Alumina, aluminum hydroxide , aluminum nitride , An aluminum compound, a zirconium compound, an antimony compound, a bismuth compound, etc. containing aluminum borate whisker etc. can be used, It can also be used in mixture of 2 or more types.
- magnesium-based compounds including magnesium hydroxide, magnesium carbonate, magnesium silicate, magnesium oxide, magnesium oxide, calcium silicate, calcium carbonate, chame oxide, etc.
- Alumina aluminum hydroxide , aluminum nitride
- An aluminum compound, a zirconium compound, an antimony compound, a bismuth compound, etc. containing aluminum borate whisker etc. can be used, It can also be used in mixture of 2 or more types.
- the filler has an average particle diameter of about O. OOlum to about lOum, preferably about 0.005um to lum. Average particle size O. If less than OOlum, fillers may aggregate in the adhesive layer, or appearance defects may occur, and if more than lOum, problems such as protrusion of the filler from the surface of the adhesive layer, damage of chips during thermocompression, and deterioration of adhesiveness may occur.
- the filler may be included in an amount of about 0.5 parts by weight to about 120 parts by weight, preferably about 5 parts by weight to about 100 parts by weight, based on 100 parts by weight of the total resin except the filler in the adhesive composition. If the content is less than about 0.5 parts by weight, the effect of improving the heat resistance and handleability due to filler addition may be insignificant. If the content is more than about 120 parts by weight, the workability and substrate adhesion are lowered, and the viscosity is increased at high temperatures Molding properties and adhesion may be lowered.
- the adhesive composition may further include a curing agent in addition to the above-described components.
- the curing agent is not particularly limited as long as the curing agent can form a crosslinked structure with the above-mentioned epoxy resin and / or thermoplastic resin.
- the curing agent may form a crosslinked structure by reacting with both the above-described epoxy resin and thermoplastic resin.
- Such a curing agent has a crosslinked structure with each of the thermoplastic resin forming a soft segment and the epoxy resin forming a hard segment in the composition, thereby improving heat resistance, and acting as a link at the interface of the components. And the reliability of a semiconductor package can be improved.
- the curing agent may be, for example, a polyfunctional phenol resin may be used, and it may be more preferable to use a polyfunctional phenol resin having a hydroxyl equivalent weight of about 100 to about 1,000.
- a polyfunctional phenol resin having a hydroxyl equivalent weight of about 100 to about 1,000.
- the hydroxyl equivalent of the phenol resin is less than about 100, the cured product with the epoxy resin has a hard property, and the complete layer property of the semiconductor package may be deteriorated.
- the hydroxyl equivalent is more than about 1,000, the crosslink density decreases. There exists a possibility that the heat resistance of a composition may fall.
- the curing agent may have a softening point of about 60 o C to about 140 o C.
- the softening point of the curing agent When the softening point of the curing agent is less than about 60 ° C., due to the increase in the tack characteristics, the B-stage elastic modulus of the adhesive film may be lowered, or the fairness such as pick-up characteristics may be deteriorated. There exists a possibility that adhesive force may fall. If the softening point exceeds about 140 ° C., the adhesion to the wafer is lowered, which may cause problems such as chip scattering during die casting.
- polyfunctional phenolic resins examples include xylox novolak resins, bisphenol F resins, bisphenol F novolak resins, bisphenol A resins, phenol novolak resins, cresol novolak resins, bisphenol A novolak resins, and phenol aralkyl resins.
- the curing agent described above is preferably included in the composition in an amount of about 0.4 to 2 equivalents, preferably about 0.5 to about 1.8 equivalents, relative to the epoxy equivalent of the epoxy resin.
- the curing agent is included in less than about 0.4 equivalent ratio, the uncoated epoxy increases after curing, the glass transition temperature and heat resistance is lowered, or the problem of maintaining a high temperature for a long time for the reaction of the uncoated epoxy group may occur.
- the curing agent is included in excess of about 2 equivalents ratio, the hygroscopicity, storage stability, and dielectric properties of the composition may deteriorate due to the nonbanung hydroxyl group.
- the adhesive layer may have a viscosity before curing of about 3000 Pa's or less at about 130 ° C, preferably about 50 to about 2500 Pa.s, and more preferably about 100 And 2000 Pa.s.
- the viscosity of the adhesive included in the crab 2-die bonding layer is in the above range.
- the die-bonding process can be performed smoothly, and in particular, when laminating 12 semiconductor chips, about 0.5kg / cm 2 to about 4kg / cm even if a small pressure of 2 by using the flexibility and fluidity, and the second die bonding layer It may be formed in the shape of molding a region that does not overlap with the region of the first semiconductor chip.
- the temperature in the process of attaching the chip is preferably about 80 to about 180 ° C
- the adhesion time is preferably made for about 0.5 seconds to about 3 seconds
- the adhesion pressure is about 0.5kg / cm 2 to about It may be desirable to be 4 kg / cm 2 .
- the die bonding film may further include a pressure-sensitive adhesive layer containing an ultraviolet curable pressure-sensitive adhesive.
- the die bonding film may be present in the form adhered to the lower portion of the semiconductor chip by this adhesive layer. That is, after attaching such a die-bonding film to a semiconductor wafer, it is irradiated with ultraviolet rays and cured, the semiconductor wafer semiconductor is divided, and the die-bonding film is attached to the lower portion of the semiconductor chip.
- the ultraviolet curable pressure sensitive adhesive may be an acrylic resin, a photo initiator, and a crosslinking agent.
- the acrylic resin may have a weight average molecular weight of 100,000 to 1.5 million, preferably 200,000 to 1 million. If the weight average molecular weight is less than 100,000, the coating property or the coarsening force is lowered, and residues may remain on the adherend during peeling, or adhesive breakage may occur. In addition, the weight average molecular weight
- the base resin may interfere with reaction of the ultraviolet curable compound and the peel force may not be reduced efficiently.
- Such acrylic resin may be, for example, a copolymer of a (meth) acrylic acid ester monomer and a crosslinkable functional group-containing monomer.
- examples of the (meth) acrylic acid ester monomer include alkyl (meth) acrylate, and more specifically, monomers having an alkyl group having 1 to 12 carbon atoms, such as pentyl (meth) acrylate and n-butyl (meth).
- the crosslinkable functional group-containing monomer contained in the copolymer is a crosslinking agent.
- a functional group capable of reacting with the ultraviolet curable compound to be described later to the copolymer serves to adjust the durability, adhesive strength, and cohesion of the pressure-sensitive adhesive.
- the crosslinkable functional group-containing monomers include a hydroxyl group-containing monomer, a carboxyl group-containing monomer or a nitrogen-containing monomer, or a combination of two or more thereof.
- Examples of the hydroxyl group-containing compound at this time include 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, 4-hydroxybutyl (meth) acrylate, 6-hydroxynuclear chamber ( Meta) acrylate, 8-hydroxyoctyl (meth) acrylate, 2-hydroxyethylene glycol (meth) acrylate, or 2-hydroxypropylene glycol (meth) acrylate, and the like, and carboxyl group-containing compounds
- examples of the small monomers include (meth) acrylonitrile, N-vinyl pyridone, or N-vinyl caprolactam, but are not limited there
- the type of ultraviolet curable compound that can be used in the present invention is not particularly limited, and for example, a polyfunctional compound having a weight average molecular weight of about 500 to 300, 000 (ex. Polyfunctional urethane acrylate, polyfunctional acrylate Monomer or oligomer, etc.) can be used.
- a polyfunctional compound having a weight average molecular weight of about 500 to 300, 000 ex. Polyfunctional urethane acrylate, polyfunctional acrylate Monomer or oligomer, etc.
- the average person skilled in the art can easily select the appropriate compound according to the intended use.
- the content of the ultraviolet curable compound may be 5 parts by weight to 400 parts by weight, preferably 10 parts by weight to 200 parts by weight, based on 100 parts by weight of the above-described base resin. If the content of the UV-curable compound is less than 5 parts by weight, there is a risk that the lowering of the adhesive strength after curing, the pick-up property may be degraded. If the content of the ultraviolet curable compound exceeds 400 parts by weight, the adhesive strength of the adhesive before UV irradiation is insufficient, or peeled off with a release film or the like. There is a fear that it will not be made easily.
- the ultraviolet curable pressure sensitive adhesive is only the additive type ultraviolet curable compound described above.
- the acrylic copolymer may further include an ultraviolet curable compound bonded to the side chain of the main chain including the (meth) acrylic acid ester monomer and the crosslinkable functional group-containing monomer.
- the kind of the above compound includes 1 to 5, preferably 1 or 2, photocurable functional groups (ex. Ultraviolet polymerizable carbon-carbon double bonds) per molecule, and crosslinking contained in the main chain. It is not particularly limited as long as it has a functional group and a reaction group. At this time, examples of the crosslinkable functional group and the functional group that can be reacted include an isocyanate group or an epoxy group, but are not limited thereto.
- the ultraviolet polymerizable group-containing compound include a hydroxyl group included in the main chain and a functional group capable of reacting with each other, (meth) acryloyloxy isocyanate and (meth) acryloyloxy methyl isocyanate, 2- (meth) ) Acryloyloxy ethyl isocyanate, 3- (meth) acryloyloxy propyl isocyanate, 4- (meth) acryloyloxy butyl isocyanate, m-propenyl- ⁇ , ⁇ -dimethylbenzyl isocyanate, methacryloyl isocyanate Or allyl isocyanate; Acryloyl monoisocyanate compounds obtained by reacting a diisocyanate compound or a polyisocyanate compound with 2-hydroxyethyl (meth) acrylate; Acryloyl monoisocyanate compounds obtained by reacting a diisocyanate compound or a polyisocyanate compound,
- the ultraviolet curable compound as described above may be included in the side chain of the base resin by substituting 5 mol% to 90 mol% of the crosslinkable functional groups included in the main chain.
- substitution amount is less than 5 mol%, there is a concern that the peeling force decrease due to ultraviolet irradiation may not be sufficient, and when the substitution amount exceeds 90 mol 3 ⁇ 4>, the pressure-sensitive adhesive before ultraviolet irradiation There is a fear that the grazing power may be lowered.
- the type of the photoinitiator is also not particularly limited, and a general initiator known in the art may be used, and the content thereof may be 0.05 part by weight to 20 parts by weight based on 100 parts by weight of the ultraviolet curable compound.
- the content of the photoinitiator is less than 0.05 parts by weight, the curing reaction by ultraviolet irradiation may be insufficient, and the pickup properties may be lowered.
- the content of the photoinitiator is more than 20 parts by weight, the crosslinking reaction may occur in a short unit during the curing process. It may generate and cause residue on the surface of the adherend, or the peeling force after curing may be too low, resulting in deterioration of pickup.
- the type of crosslinking agent included in the adhesive portion for imparting the adhesive force and the compaction force is not particularly limited, and conventional compounds such as an isocyanate compound, an aziridine compound, an epoxy compound, or a metal chelate compound may be used.
- the crosslinking agent may be included in an amount of 0.5 parts by weight to 40 parts by weight, preferably 0.5 parts by weight to 20 parts by weight, based on 100 parts by weight of the base resin. If the content is less than 0.5 parts by weight, there is a fear that the cohesive force of the pressure-sensitive adhesive is insufficient, if it exceeds 20 parts by weight, the adhesive strength before ultraviolet irradiation is insufficient, chip scattering may occur.
- the pressure-sensitive adhesive layer of the present invention may also suitably include a tackifier such as rosin resin, terpene resin, phenol resin, styrene resin, aliphatic petroleum resin, aromatic petroleum resin or aliphatic aromatic copolymerized petroleum resin.
- a tackifier such as rosin resin, terpene resin, phenol resin, styrene resin, aliphatic petroleum resin, aromatic petroleum resin or aliphatic aromatic copolymerized petroleum resin.
- the first and second die bonding layer may have a thickness of about 1 to about 160um, preferably about 15 to about 120um, more preferably about 20 To about lOOum.
- the die-bonding film thickness before lamination is in the above range, molding by the second die-bonding layer may be preferably performed.
- the outermost part may be molded by the outer protective layer 500. That is, the entire exterior of the semiconductor device is covered with a semiconductor sealing material (Packaging Material, Encapsulating Materi al), to protect the semiconductor chip from the external environment, to electrically insulate the semiconductor chip from the outside, and to operate the semiconductor chip Heat generated during In order to release effectively, it is preferable to be in the molded form by the compound for epoxy molding (ECM) etc.
- a semiconductor sealing material Packaging Material, Encapsulating Materi al
- the step of die bonding a first semiconductor chip comprising a first die bonding film on the substrate; And die-bonding a crab semiconductor chip having a second die bonding film on the bottom of the crab semiconductor chip, wherein the crab two die-bonding film comprises the crab in the lower region of the crab semiconductor chip.
- a method of manufacturing a semiconductor device in which die bonding is performed in a manner of molding a region not overlapping with a region of a semiconductor chip.
- the method may further include die bonding 1 to 5 semiconductor chips on the substrate before the die bonding of the first semiconductor chip. Description of the case where two or more semiconductor chips are stacked is as described above. ,
- first die-bonding film and the second die-bonding film may include an adhesive layer containing an epoxy resin and a curing agent, the adhesive layer may be preferably a viscosity of less than 3000Pa-s at 130 ° C before curing.
- first die bonding film, the second die bonding film, and the adhesive layer are as described above in the description of the semiconductor device.
- the operation and effects of the invention will be described in more detail with reference to specific embodiments of the invention. However, these embodiments are only presented as an example of the invention, whereby the scope of the invention is not determined.
- An acrylate copolymer was prepared by copolymerizing 2-ethylnuclear acrylate, methyl acrylate, and methyl methacrylate (weight average molecular weight 800, 000 g / mol, Tg: 10 ° C.).
- the prepared UV curable pressure-sensitive adhesive composition was applied onto a release-treated polyester film having a thickness of 38 ⁇ m, dried at 110 ° C. for 3 minutes, and the thickness of the applied composition after drying was lOOm.
- a dicing film was prepared by laminating a polyolefin film having a thickness of 100 ⁇ m.
- the varnish is applied to a release-treated PET film having a thickness of 38 um,
- a die-bonding film was prepared in the same manner as in Preparation Example 2-1, except that SFP-10X spherical silica, manufacturer: Denka, and an average particle diameter of 300 nm) was used as a filler at 60 parts by weight.
- Preparation Example 2-4 SFP-10X spherical silica, manufacturer: Denka, and an average particle diameter of 300 nm was used as a filler at 60 parts by weight.
- a die bonding film was prepared in the same manner as in 2-1. Comparative Production Example 2-6
- a die bonding film was manufactured in the same manner as in Preparation Example 2-1, except that 100 parts by weight of the acrylic thermoplastic resin was used instead of 50 parts by weight. Comparative Production Example 2-7
- a die-bonding film was prepared in the same manner as in Preparation Example 2-1, except that SFP-10X (spherical silica, manufacturer: Denka average particle diameter: 300 nm) was used at 150 parts by weight instead of SFP-30M.
- SFP-10X spherical silica, manufacturer: Denka average particle diameter: 300 nm
- the semiconductor chip is pressed against the substrate (thickness 0.5kg, width 60 ⁇ , length 230 ⁇ ) at 2 kgf / cm 2 for 2 seconds under the condition of 125 0 C, die-bonded, for 1 hour in an oven at 125 ° C. Curing proceeded.
- crab second semiconductor chips having the same size are stacked so as to cross the first semiconductor chip in a cross shape, and a region of the lower region of the second semiconductor chip that does not overlap with the giant U semiconductor chip is the first semiconductor chip. It is formed on both sides of the side (1.5 ⁇ horizontal and 10 ⁇ vertical, respectively). 2kgf / cm 2 , after pressing for 2 seconds at a condition of 125 0 C, die-bonded, and cured in an oven at 125 ° C. for 1 hour, to manufacture a semiconductor device.
- the second semiconductor chip After lamination of the second semiconductor chip, it was cured for 1 hour in an Aubon of 125 0 C, and the cross section of the semiconductor device (laminate) was polished in the longitudinal direction of the roughly 12 semiconductor chip, and the molding was confirmed by an optical microscope.
- Fig. 3 shows the polished cross section of the semiconductor device manufactured in Example 1-1 of the present invention under an optical microscope.
- a region in which a crab die-bonding layer does not overlap with an area of the first semiconductor chip of the lower area of the second semiconductor chip is shown. It can be seen that it is formed in a completely molded form.
- the second semiconductor chip After lamination of the second semiconductor chip, it was cured for 1 hour in an oven at 125 ° C., and a 60 ⁇ m gold wire (25 ⁇ m in diameter) was formed in the upper region of the second semiconductor chip that did not overlap with the region of the crab semiconductor chip. Are connected by a wire bonding process, and the presence or absence of cracking of the second semiconductor chip was observed by an optical microscope, and 0 was indicated when no crack occurred, and X when the crack occurred.
- Table 1 The above molding evaluation and crack resistance evaluation results are summarized in Table 1 below.
- the second die bonding layer is formed in a shape in which a region of the lower region of the second semiconductor chip does not overlap with the region of the first semiconductor chip. As compared with the semiconductor device according to the comparative example, it can be confirmed that the molding characteristics and the crack resistance are excellent.
Landscapes
- Die Bonding (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US15/757,197 US10707187B2 (en) | 2015-11-06 | 2016-11-04 | Semiconductor device and method for manufacturing semiconductor device |
| CN201680050678.8A CN107924879A (zh) | 2015-11-06 | 2016-11-04 | 半导体器件和制造半导体器件的方法 |
| JP2018511720A JP6819942B2 (ja) | 2015-11-06 | 2016-11-04 | 半導体装置および半導体装置の製造方法 |
| US16/884,559 US10991678B2 (en) | 2015-11-06 | 2020-05-27 | Semiconductor device and method for manufacturing semiconductor device |
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020150155906A KR20170053416A (ko) | 2015-11-06 | 2015-11-06 | 반도체 장치 및 반도체 장치의 제조 방법 |
| KR10-2015-0155906 | 2015-11-06 |
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| US15/757,197 A-371-Of-International US10707187B2 (en) | 2015-11-06 | 2016-11-04 | Semiconductor device and method for manufacturing semiconductor device |
| US16/884,559 Division US10991678B2 (en) | 2015-11-06 | 2020-05-27 | Semiconductor device and method for manufacturing semiconductor device |
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| WO2017078469A1 true WO2017078469A1 (ko) | 2017-05-11 |
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| US (2) | US10707187B2 (ko) |
| JP (2) | JP6819942B2 (ko) |
| KR (1) | KR20170053416A (ko) |
| CN (1) | CN107924879A (ko) |
| TW (1) | TWI645521B (ko) |
| WO (1) | WO2017078469A1 (ko) |
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| JP6819942B2 (ja) | 2021-01-27 |
| US10707187B2 (en) | 2020-07-07 |
| TW201731039A (zh) | 2017-09-01 |
| US20200294972A1 (en) | 2020-09-17 |
| US10991678B2 (en) | 2021-04-27 |
| TWI645521B (zh) | 2018-12-21 |
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| JP2018526830A (ja) | 2018-09-13 |
| KR20170053416A (ko) | 2017-05-16 |
| US20180261576A1 (en) | 2018-09-13 |
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