WO2015141343A1 - 異方性導電接着剤 - Google Patents
異方性導電接着剤 Download PDFInfo
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- WO2015141343A1 WO2015141343A1 PCT/JP2015/053957 JP2015053957W WO2015141343A1 WO 2015141343 A1 WO2015141343 A1 WO 2015141343A1 JP 2015053957 W JP2015053957 W JP 2015053957W WO 2015141343 A1 WO2015141343 A1 WO 2015141343A1
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J9/00—Adhesives characterised by their physical nature or the effects produced, e.g. glue sticks
- C09J9/02—Electrically-conducting adhesives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
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- 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
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- C09J163/00—Adhesives based on epoxy resins; Adhesives based on derivatives of epoxy resins
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- C09J201/00—Adhesives based on unspecified macromolecular compounds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B1/00—Conductors or conductive bodies characterised by the conductive materials; Selection of materials as conductors
- H01B1/20—Conductive material dispersed in non-conductive organic material
- H01B1/22—Conductive material dispersed in non-conductive organic material the conductive material comprising metals or alloys
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/30—Assembling printed circuits with electric components, e.g. with resistor
- H05K3/32—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits
- H05K3/321—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives
- H05K3/323—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by conductive adhesives by applying an anisotropic conductive adhesive layer over an array of pads
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- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/855—Optical field-shaping means, e.g. lenses
- H10H20/856—Reflecting means
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- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/857—Interconnections, e.g. lead-frames, bond wires or solder balls
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- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
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- H10H20/858—Means for heat extraction or cooling
- H10H20/8581—Means for heat extraction or cooling characterised by their material
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- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/858—Means for heat extraction or cooling
- H10H20/8583—Means for heat extraction or cooling not being in contact with the bodies
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- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
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- C08K2003/0806—Silver
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- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
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- C08K2201/003—Additives being defined by their diameter
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- C—CHEMISTRY; METALLURGY
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/314—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier the adhesive layer and/or the carrier being conductive
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- C09J2301/50—Additional features of adhesives in the form of films or foils characterized by process specific features
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
- H05K2201/0206—Materials
- H05K2201/0221—Insulating particles having an electrically conductive coating
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- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/02—Fillers; Particles; Fibers; Reinforcement materials
- H05K2201/0203—Fillers and particles
- H05K2201/0263—Details about a collection of particles
- H05K2201/0272—Mixed conductive particles, i.e. using different conductive particles, e.g. differing in shape
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- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/10—Details of components or other objects attached to or integrated in a printed circuit board
- H05K2201/10007—Types of components
- H05K2201/10106—Light emitting diode [LED]
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- H05K2201/00—Indexing scheme relating to printed circuits covered by H05K1/00
- H05K2201/20—Details of printed circuits not provided for in H05K2201/01 - H05K2201/10
- H05K2201/2054—Light-reflecting surface, e.g. conductors, substrates, coatings, dielectrics
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- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
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- H10H20/01—Manufacture or treatment
- H10H20/036—Manufacture or treatment of packages
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- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
- H10H20/036—Manufacture or treatment of packages
- H10H20/0365—Manufacture or treatment of packages of means for heat extraction or cooling
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Definitions
- the present invention relates to an anisotropic conductive adhesive in which conductive particles are dispersed, and in particular, can dissipate heat generated by a chip (element) such as an LED (Light Emitting Diode) or a driver IC (Integrated Circuit).
- a chip such as an LED (Light Emitting Diode) or a driver IC (Integrated Circuit).
- the present invention relates to an anisotropic conductive adhesive.
- a wire bond method has been used as a method of mounting LED elements on a substrate.
- the electrodes (first conductivity type electrode 104a and second conductivity type electrode 102a) of the LED element face upward, and the LED element and the substrate are electrically joined. Is performed by wire bonding (WB) 301a and 301b, and a die bonding material 302 is used for bonding the LED element and the substrate.
- WB wire bonding
- the LED element electrodes face the substrate side (face down, flip chip) as shown in FIG.
- the electrode surface of the LED element is directed to the substrate side (face down, flip chip), and the electrical connection and adhesion between the LED element and the substrate are insulative.
- an anisotropic conductive adhesive in which conductive particles 306 are dispersed in an adhesive binder 305. Since the anisotropic conductive adhesive has a short bonding process, the production efficiency is good.
- An anisotropic conductive adhesive is inexpensive and excellent in transparency, adhesiveness, heat resistance, mechanical strength, electrical insulation, and the like.
- FC mounting LED element can be designed to have a large electrode area by the passivation 105, bumpless mounting is possible. Further, the light extraction efficiency is improved by providing a reflective film under the light emitting layer.
- Gold-tin eutectic bonding is a method in which a chip electrode is formed of an alloy 307 of gold and tin, a flux is applied to a substrate, the chip is mounted and heated, and eutectic bonding is performed with the substrate electrode.
- solder connection method has a bad yield because there is an adverse effect on reliability due to chip displacement during heating or flux that could not be cleaned.
- advanced mounting technology is required.
- solder connection method As a method not using gold-tin eutectic, there is a solder connection method using a solder paste 303 for electrical connection between the electrode surface of the LED element and the substrate, as shown in FIG.
- solder connection method since the paste has isotropic conductivity, the pn electrodes are short-circuited and the yield is poor.
- the electrical connection and adhesion between the LED element and the substrate as in FIG. 7, ACF in which conductive particles 306 are dispersed in an insulating binder are used.
- ACF in which conductive particles 306 are dispersed in an insulating binder are used.
- anisotropic conductive adhesive is filled with an insulating binder between the pn electrodes. Accordingly, the yield is good because short-circuiting hardly occurs. Moreover, since the bonding process is short, the production efficiency is good.
- the active layer 103 is located on the substrate side, so that heat is efficiently transmitted to the substrate side.
- FIGS. 6 and 9 when the electrodes are joined with the conductive pastes 303a and 303b, heat can be radiated with high efficiency, but the connection with the conductive pastes 303a and 303b is as described above. Connection reliability is poor. Also, as shown in FIG. 8, when gold-tin eutectic bonding is performed, the connection reliability is poor as described above.
- flip chip mounting can be performed with an anisotropic conductive adhesive such as ACF (Anisotropic conductive film) or ACP (Anisotropic Conductive Paste) without using the conductive pastes 303a and 303b.
- ACF Anisotropic conductive film
- ACP Anisotropic Conductive Paste
- the present invention has been proposed in view of such conventional circumstances, and provides an anisotropic conductive adhesive capable of obtaining excellent optical characteristics and heat dissipation characteristics.
- the present inventor has blended conductive particles having a metal layer mainly composed of Ag on the outermost surface of resin particles, solder particles, and light-reflective insulating particles.
- the inventors have found that the above object can be achieved, and have completed the present invention.
- the anisotropic conductive adhesive according to the present invention includes conductive particles in which a metal layer mainly composed of Ag is formed on the outermost surface of resin particles, and solder particles having an average particle size smaller than that of the conductive particles. And a light-reflective insulating particle having an average particle size smaller than that of the solder particle, and a binder that disperses the conductive particle, the solder particle, and the light-reflective insulating particle.
- connection structure includes a first electronic component, a second electronic component, conductive particles in which a metal layer mainly composed of Ag is formed on the outermost surface of the resin particles, and the conductive layer.
- Solder particles having an average particle size smaller than the conductive particles, light-reflective insulating particles having an average particle size smaller than the solder particles, and a binder for dispersing the conductive particles, the solder particles, and the light-reflective insulating particles
- An anisotropic conductive film formed by bonding the first electronic component and the second electronic component with an anisotropic conductive adhesive containing: a terminal of the first electronic component; A terminal of the second electronic component is electrically connected through the conductive particles and is soldered by the solder particles.
- the resin particles include conductive particles having a metal layer mainly composed of Ag formed on the outermost surface of the resin particles, and light-reflective insulating particles having an average particle size smaller than that of the solder particles. High reflectance and excellent optical properties can be obtained.
- solder particles having an average particle size smaller than that of the conductive particles are contained, the contact area of the terminal is increased by solder bonding, and excellent heat dissipation characteristics can be obtained.
- FIG. 1 is a cross-sectional view schematically showing between opposing terminals before crimping.
- FIG. 2 is a cross-sectional view schematically showing between terminals facing each other after crimping.
- FIG. 3 is a cross-sectional view showing an example of an LED mounting body according to an embodiment of the present invention.
- FIG. 4 is a cross-sectional view showing an example of an LED mounting body according to another embodiment of the present invention.
- FIG. 5 is a cross-sectional view showing an example of an LED package by a conventional wire bond method.
- FIG. 6 is a cross-sectional view showing an example of an LED mounting body using a conventional conductive paste.
- FIG. 7 is a cross-sectional view showing an example of an LED mounting body using a conventional anisotropic conductive adhesive.
- FIG. 8 is a cross-sectional view showing an example of an LED mounting body in which a conventional FC mounting LED is mounted by gold-tin eutectic bonding.
- FIG. 9 is a cross-sectional view showing an example of an LED mounting body in which a conventional FC mounting LED is mounted with a conductive paste.
- FIG. 10 is a cross-sectional view showing an example of an LED mounting body in which a conventional FC mounting LED is mounted with an anisotropic conductive adhesive.
- the anisotropic conductive adhesive in the present embodiment includes conductive particles in which a metal layer mainly composed of Ag is formed on the outermost surface of the resin particles, solder particles having an average particle size smaller than the conductive particles, Light-reflective insulating particles having an average particle size smaller than that of solder particles are dispersed in a binder (adhesive component), and the shape thereof is a paste, a film, and the like, and is appropriately selected according to the purpose. Can do.
- FIG. 1 and FIG. 2 are cross-sectional views schematically showing the terminals facing each other before and after crimping, respectively.
- the solder particles 32 having an average particle size smaller than that of the conductive particles 31 are crushed following the flat deformation of the conductive particles 31 during the press bonding, and are metal-bonded by soldering by heating. For this reason, the area which contacts a terminal increases and can improve a thermal radiation characteristic and an electrical property.
- the solder particles 32 are larger than the conductive particles 31, leakage may occur and the yield may be deteriorated.
- the conductive particles are light-reflective conductive particles in which a metal layer mainly composed of Ag is formed on the outermost surface of the resin particles, surplus conductive particles that are not captured by the terminal portion are The light from the light emitting part of the LED chip is efficiently reflected, and the light extraction efficiency of the LED mounting body is improved.
- the light-reflective insulating particles efficiently reflect the light from the light emitting part of the LED chip, and improve the light extraction efficiency of the LED mounting body.
- the light-reflective insulating particles have an average particle size smaller than that of the solder particles, capture of the light-reflective insulating particles between the opposing terminals is suppressed. For this reason, the favorable heat dissipation characteristic and electrical property of a LED mounting body can be acquired.
- the conductive particles are metal-coated resin particles in which a metal layer mainly composed of Ag is formed on the outermost surface of the resin particles.
- the resin particles include epoxy resins, phenol resins, acrylic resins, acrylonitrile / styrene (AS) resins, benzoguanamine resins, divinylbenzene resins, styrene resins, and the like.
- the surface of the resin particles may be coated with Ni or the like. According to such light-reflective conductive particles, the contact area with the wiring pattern can be increased because the light-reflective conductive particles are easily crushed and deformed during compression. Also, variations in the height of the wiring pattern can be absorbed.
- metals other than Ag include, for example, Bi, Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, Fe, Ru, Co, Rh, Ir Ni, Pd, Pt, Cu, Au, Zn, Al, Ga, In, Si, Ge, Sn and the like.
- an Ag alloy containing 95.0 atm% or more and 99.8 atm% or less of Ag, 0.1 atm% or more and 3.0 atm% or less of Bi, and Nd of 0.1 atm% or more and 2.0 atm% or less is used. preferable. Thereby, the outstanding light reflectivity and migration resistance can be obtained.
- the average particle size of the conductive particles is preferably 1 ⁇ m or more and 10 ⁇ m or less, more preferably 1 ⁇ m or more and 8 ⁇ m or less. Moreover, it is preferable that the compounding quantity of electroconductive particle is 1 to 100 mass parts with respect to 100 mass parts of binders from a viewpoint of connection reliability and insulation reliability.
- the solder particles have an average particle size smaller than that of the conductive particles.
- the average particle size of the solder particles is 20% or more and less than 100% of the average particle size of the conductive particles. If the solder particles are too small relative to the conductive particles, the solder particles are not captured between the terminals facing each other at the time of pressure bonding, and metal bonding is not performed, so that excellent heat dissipation characteristics and electrical characteristics cannot be obtained. On the other hand, if the solder particles are too large with respect to the conductive particles, for example, a shoulder touch due to the solder particles occurs at the edge portion of the LED chip, a leak occurs, and the product yield deteriorates.
- the solder particles are, for example, Sn-Pb series, Pb-Sn-Sb series, Sn-Sb series, Sn-Pb-Bi series, Bi-Sn series, Sn-Cu series, as defined in JIS Z 3282-1999, It can be appropriately selected from Sn—Pb—Cu, Sn—In, Sn—Ag, Sn—Pb—Ag, Pb—Ag, and the like according to the electrode material and connection conditions. Further, the shape of the solder particles can be appropriately selected from granular, flake shaped, and the like. Note that the solder particles may be covered with an insulating layer in order to improve anisotropy.
- the blending amount of the solder particles is preferably 1% by volume or more and 30% by volume or less. If the blending amount of the solder particles is too small, excellent heat dissipation characteristics cannot be obtained, and if the blending amount is too large, anisotropy is impaired and excellent connection reliability cannot be obtained.
- the light-reflective insulating particles have an average particle size smaller than that of the solder particles, and preferably 2% or more and less than 30% of the average particle size of the solder particles. If the light-reflective insulating particles are too small, the light from the light emitting part of the LED chip cannot be efficiently reflected. If the light-reflective insulating particles are too large relative to the solder particles, the light-reflective insulating particles bite between the solder particles and the electrode of the LED chip or between the solder particles and the substrate wiring, thereby preventing heat dissipation. Become.
- the light-reflective insulating particles are preferably at least one selected from the group consisting of titanium oxide (TiO 2 ), boron nitride (BN), zinc oxide (ZnO), and aluminum oxide (Al 2 O 3 ). Since these light-reflective insulating particles themselves are gray to white under natural light, the wavelength dependency of the reflection characteristics with respect to visible light is small, and the light emission efficiency can be improved. Among these, titanium oxide having a high refractive index is preferably used.
- the blending amount of the light-reflective insulating particles is preferably 1 to 50% by volume, more preferably 5 to 25% by volume. If the blending amount of the light-reflective insulating particles is too small, sufficient light reflection cannot be realized, and if the blending amount of the light-reflective insulating particles is too large, the connection based on the conductive particles used together is hindered.
- the blending amount of solder particles is larger than the blending amount of conductive particles, and the blending amount of light-reflective insulating particles is the blending amount of solder particles. It is preferable that there are more. By such blending, excellent optical characteristics, heat dissipation characteristics, and electrical characteristics can be obtained.
- an adhesive composition used in a conventional anisotropic conductive adhesive or anisotropic conductive film can be used.
- Preferred examples of the adhesive composition include an epoxy curable adhesive mainly composed of an alicyclic epoxy compound, a heterocyclic epoxy compound, a hydrogenated epoxy compound, or the like.
- Preferred examples of the alicyclic epoxy compound include those having two or more epoxy groups in the molecule. These may be liquid or solid. Specific examples include glycidyl hexahydrobisphenol A, 3,4-epoxycyclohexenylmethyl-3 ', 4'-epoxycyclohexene carboxylate, and the like. Among them, 3,4-epoxycyclohexenylmethyl-3 ′, 4′-epoxycyclohexenecarboxylate is preferred because it can ensure light transmission suitable for mounting LED elements on the cured product and is excellent in rapid curing. Can be preferably used.
- heterocyclic epoxy compound examples include an epoxy compound having a triazine ring, and particularly preferably 1,3,5-tris (2,3-epoxypropyl) -1,3,5-triazine-2,4, Mention may be made of 6- (1H, 3H, 5H) -trione.
- water-added epoxy compound hydrogenated products of the above-described alicyclic epoxy compounds and heterocyclic epoxy compounds, and other known hydrogenated epoxy resins can be used.
- the alicyclic epoxy compound, heterocyclic epoxy compound and hydrogenated epoxy compound may be used alone, but two or more kinds may be used in combination.
- other epoxy compounds may be used in combination as long as the effects of the present invention are not impaired.
- the curing agent examples include acid anhydrides, imidazole compounds, and dicyan.
- acid anhydrides that are difficult to discolor the cured product particularly alicyclic acid anhydride-based curing agents, can be preferably used.
- methylhexahydrophthalic anhydride etc. can be mentioned preferably.
- the amount of each used is an uncured epoxy compound if there is too little alicyclic acid anhydride curing agent. If the amount is too large, corrosion of the adherend material tends to be accelerated due to the influence of the excess curing agent. Therefore, the alicyclic acid anhydride curing agent is added to 100 parts by mass of the alicyclic epoxy compound.
- the ratio is preferably 80 to 120 parts by mass, more preferably 95 to 105 parts by mass.
- the solder particles 32 having an average particle size smaller than that of the conductive particles 31 are crushed following the flat deformation of the conductive particles 31 at the time of pressure bonding, and metal is formed by soldering by heating. Join. For this reason, the area which contacts a terminal increases and can improve a thermal radiation characteristic and an electrical property.
- the conductive particles are light-reflective conductive particles in which a metal layer mainly composed of Ag is formed on the outermost surface of the resin particles, surplus conductive particles that are not captured by the terminal portion are The light from the light emitting part of the LED chip is efficiently reflected, and the light extraction efficiency of the LED mounting body is improved.
- the light-reflective insulating particles efficiently reflect light from the light emitting portion of the LED chip, and improve the light extraction efficiency of the LED mounting body.
- the light-reflective insulating particles have an average particle size smaller than that of the solder particles, capture of the light-reflective insulating particles between the opposing terminals is suppressed. For this reason, the favorable heat dissipation characteristic and electrical property of a LED mounting body can be acquired.
- the light from the light emitting portion of the LED chip is absorbed by the Au plating and the amount of light flux is reduced in the solder bonding using only the Au—Sn eutectic.
- an anisotropic conductive adhesive containing light-reflective conductive particles and light-reflective insulating particles By using an anisotropic conductive adhesive containing light-reflective conductive particles and light-reflective insulating particles, a high light flux can be obtained.
- connection structure in the present embodiment includes a first electronic component, a second electronic component, conductive particles in which a metal layer mainly composed of Ag is formed on the outermost surface of the resin particles, and conductive particles Containing anisotropically smaller solder particles, light-reflective insulating particles having an average particle diameter smaller than the solder particles, and conductive particles, solder particles, and a binder that disperses the light-reflective insulating particles
- An anisotropic conductive film formed by bonding the first electronic component and the second electronic component with a conductive conductive adhesive, and the terminal of the first electronic component and the terminal of the second electronic component are It is electrically connected via conductive particles and is soldered by solder particles.
- a chip such as an LED (Light Emitting Diode) that generates heat or a driver IC (Integrated Circuit) is suitable, and a chip is used as the second electronic component.
- a substrate to be mounted is suitable.
- FIG. 3 is a cross-sectional view showing a configuration example of the LED mounting body.
- This LED mounting body is an anisotropic conductive adhesive in which an LED element and a substrate, the conductive particles 31 described above, and solder particles 32 having an average particle size smaller than the conductive particles are dispersed in an adhesive component. It is connected using.
- the LED element includes, for example, a first conductive clad layer 12 made of, for example, n-GaN, an active layer 13 made of, for example, an In x Al y Ga 1-xy N layer, on an element substrate 11 made of, for example, sapphire, and a second conductivity type cladding layer 14 made of p-GaN, and has a so-called double heterostructure. Further, a first conductivity type electrode 12 a is provided on a part of the first conductivity type cladding layer 12, and a second conductivity type electrode 14 a is provided on a part of the second conductivity type cladding layer 14. When a voltage is applied between the first conductivity type electrode 12a and the second conductivity type electrode 14a of the LED element, carriers are concentrated on the active layer 13 and recombination causes light emission.
- the substrate includes a circuit pattern 22 for the first conductivity type and a circuit pattern 23 for the second conductivity type on the base material 21, and positions corresponding to the first conductivity type electrode 12a and the second conductivity type electrode 14a of the LED element. Each have an electrode 22a and an electrode 23a.
- the terminals (electrodes 12a and 14a) of the LED element and the terminals (electrodes 22a and 23a) of the substrate are electrically connected via the conductive particles 31, and Metal bonding is performed by solder bonding using the solder particles 32.
- the contact area between the terminals is increased, the heat generated in the active layer 13 of the LED element can be efficiently released to the substrate side, the decrease in the light emission efficiency can be prevented, and the LED mounting body can be extended in life. it can.
- the LED element for flip chip mounting is designed such that the terminals (electrodes 12a, 14a) of the LED element are large due to the passivation 105, and therefore the terminals (electrodes 12a, 14a) of the LED element. ) And the terminals (circuit patterns 22 and 23) of the substrate, more conductive particles 31 and solder particles 32 are captured. Thereby, the heat generated in the active layer 13 of the LED element can be released to the substrate side more efficiently.
- connection structure manufacturing method in the present embodiment includes conductive particles in which a metal layer mainly composed of Ag is formed on the outermost surface of resin particles, solder particles having an average particle size smaller than the conductive particles, An anisotropic conductive adhesive containing light-reflective insulating particles having an average particle size smaller than that of solder particles and conductive particles, solder particles, and a binder that disperses the light-reflective insulating particles is used as the first electronic component.
- the first electronic component and the second electronic component are thermocompression bonded between the first electronic component and the second electronic component.
- the terminal of the first electronic component and the terminal of the second electronic component are electrically connected via the conductive particles, and the terminal of the first electronic component and the terminal of the second electronic component are further connected.
- the conductive particles are deformed flat by pressing and electrically connected at the time of crimping, and the contact area between the terminals facing each other by solder bonding with the solder particles is increased. Since it increases, high heat dissipation and high connection reliability can be obtained.
- an anisotropic conductive adhesive was prepared by blending light-reflective conductive particles, solder particles, and a white inorganic filler, and the reflectance was evaluated. Moreover, the LED mounting body was produced and evaluated about the total luminous flux amount, the thermal radiation characteristic, and the electrical property.
- an Ag alloy (trade name: GB100, manufactured by COBELCO) is formed with a thickness of 0.25 ⁇ m on a resin core Ni conductive particle having a particle size of 5 ⁇ m by a sputtering method, and light-reflective conductive having a particle size of 5.5 ⁇ m. Particle B was produced.
- the Ni conductive particles those having a surface of a spherical acrylic resin ( ⁇ 4.6 ⁇ m) plated with Ni (0.2 ⁇ mt) were used.
- Au was formed to a thickness of 0.25 ⁇ m on a spherical acrylic resin having a particle size of 5 ⁇ m by sputtering to produce light-reflective conductive particles C having a particle size of 5.5 ⁇ m.
- anisotropic conductive adhesive In an epoxy curing adhesive (epoxy resin (trade name: CEL2021P, manufactured by Daicel Chemical Industries, Ltd.) and acid anhydride (MeHHPA, product name: MH700, manufactured by Shin Nippon Rika Co., Ltd.)) The anisotropic conductive adhesive was prepared by blending 2% by volume of light-reflective conductive particles, 5% by volume of solder particles, and 10% by volume of titanium oxide as a white inorganic filler.
- epoxy curing adhesive epoxy curing adhesive
- epoxy resin trade name: CEL2021P, manufactured by Daicel Chemical Industries, Ltd.
- acid anhydride MeHHPA, product name: MH700, manufactured by Shin Nippon Rika Co., Ltd.
- Solder particles having an average particle size (D50) of 0.8 ⁇ m, 1.1 ⁇ m, 5.0 ⁇ m, and 20.0 ⁇ m were prepared (trade name: M707 (Sn-3.0Ag-0.5Cu), mp: 217 ° C., manufactured by Senju Metal Industry Co., Ltd.).
- the total luminous flux of the LED package was measured using an integrating sphere total luminous flux measurement device (LE-2100, Otsuka Electronics Co., Ltd.).
- Table 1 shows the evaluation results of optical characteristics, heat dissipation characteristics, and electrical characteristics for Examples and Comparative Examples.
- the reflectance of the anisotropic conductive adhesive was 65% at a wavelength of 450 nm.
- the total luminous flux of the LED package manufactured using the anisotropic conductive adhesive is 7.0 lm, and the thermal resistance value of the electrical connection portion is 13.2 ° C./W.
- the optical characteristics and heat dissipation characteristics could be improved.
- the initial evaluation of the conduction reliability of the LED mounting body was “good”, and the evaluation after the lighting test at 85 ° C. and 85% 3000 h was “good”, and stable electrical characteristics could be obtained.
- the reflectance of the anisotropic conductive adhesive was 60% at a wavelength of 450 nm. Moreover, the total luminous flux amount of the LED mounting body manufactured using the anisotropic conductive adhesive is 6.5 lm, and the thermal resistance value of the electrical connection portion is 13.6 ° C./W. Compared with Example 1), the optical characteristics and heat dissipation characteristics could be improved. In addition, the initial evaluation of the conduction reliability of the LED mounting body was “good”, and the evaluation after the lighting test at 85 ° C. and 85% 3000 h was “good”, and stable electrical characteristics could be obtained.
- the reflectance of the anisotropic conductive adhesive was 55% at a wavelength of 450 nm. Moreover, the total luminous flux of the LED mounting body manufactured using the anisotropic conductive adhesive is 6.0 lm, and the thermal resistance value of the electrical connection portion is 12.5 ° C./W. Compared with Example 1), the optical characteristics and heat dissipation characteristics could be improved. In addition, the initial evaluation of the conduction reliability of the LED mounting body was “good”, and the evaluation after the lighting test at 85 ° C. and 85% 3000 h was “good”, and stable electrical characteristics could be obtained.
- the reflectance of the anisotropic conductive adhesive was 50% at a wavelength of 450 nm. Moreover, the total luminous flux of the LED mounting body manufactured using the anisotropic conductive adhesive is 5.7 lm, and the thermal resistance value of the electrical connection portion is 14.5 ° C./W. Compared with Example 1), the optical characteristics and heat dissipation characteristics could be improved. In addition, the initial evaluation of the conduction reliability of the LED mounting body was “good”, and the evaluation after the lighting test at 85 ° C. and 85% 3000 h was “good”, and stable electrical characteristics could be obtained.
- the reflectance of the anisotropic conductive adhesive was 64% at a wavelength of 450 nm.
- the total luminous flux of the LED package manufactured using the anisotropic conductive adhesive is 6.9 lm
- the thermal resistance value of the electrical connection portion is 13.0 ° C./W.
- the optical characteristics and heat dissipation characteristics could be improved.
- the initial evaluation of the conduction reliability of the LED mounting body was “good”, and the evaluation after the lighting test at 85 ° C. and 85% 3000 h was “good”, and stable electrical characteristics could be obtained.
- the reflectance of the anisotropic conductive adhesive was as low as 8% at a wavelength of 450 nm. Moreover, the total luminous flux of the LED mounting body produced using the anisotropic conductive adhesive was 3.3 lm, and the thermal resistance value of the electrical connection portion was as high as 40.0 ° C./W. In addition, the initial evaluation of the conduction reliability of the LED mounting body was “good”, and the evaluation after the lighting test at 85 ° C. and 85% 3000 h was “good”, and stable electrical characteristics could be obtained.
- the reflectance of the anisotropic conductive adhesive was 70% at a wavelength of 450 nm. Moreover, the total luminous flux of the LED mounting body manufactured using the anisotropic conductive adhesive was 7.5 lm, and the thermal resistance value of the electrical connection portion was as high as 40.0 ° C./W. In addition, the initial evaluation of the conduction reliability of the LED mounting body was “good”, and the evaluation after the lighting test at 85 ° C. and 85% 3000 h was “good”, and stable electrical characteristics could be obtained.
- the reflectance of the anisotropic conductive adhesive was 67% at a wavelength of 450 nm. Moreover, the LED mounting body produced using the anisotropic conductive adhesive had an initial evaluation of conduction reliability of x, and leakage occurred. For this reason, the total luminous flux, the thermal resistance value, and the electrical characteristics were not evaluated. The leakage is considered to be caused by a short circuit between the wirings because the solder particle size is too large.
- the reflectance of the anisotropic conductive adhesive was 58% at a wavelength of 450 nm.
- the total luminous flux of the LED mounting body produced using the anisotropic conductive adhesive was 6.3 lm, and the thermal resistance value of the electrical connection portion was slightly high at 19.8 ° C./W. This is presumably because the solder particles were too small and there were many parts that did not metal bond between the LED chip and the substrate wiring.
- the initial evaluation of the conduction reliability of the LED mounted body is ⁇
- the evaluation after the lighting test at 85 ° C. and 85% 3000 h is ⁇
- the reflectance of the anisotropic conductive adhesive was 20% at a wavelength of 450 nm. Moreover, the total luminous flux of the LED mounting body produced using the anisotropic conductive adhesive was as low as 3.7 lm. This is considered to be because light reflectivity was not obtained because the particle size of titanium oxide was much smaller than the wavelength of light emitted by the LED. Moreover, the thermal resistance value of the electrical connection part of the LED mounting body was 12.3 ° C./W. Moreover, the initial evaluation of the conduction reliability of the LED mounting body was “good”, and the evaluation after the lighting test at 85 ° C. and 85% 3000 h was “good”.
- the reflectance of the anisotropic conductive adhesive was 40% at a wavelength of 450 nm.
- the total luminous flux of the LED mounting body produced using the anisotropic conductive adhesive was 5.0 lm, and the thermal resistance value of the electrical connection portion was as high as 30.0 ° C./W. This is presumably because the titanium oxide became a spacer between the chip electrode and the substrate electrode and hindered solder particle crushing.
- the initial evaluation of the conduction reliability of the LED mounted body is ⁇
- the evaluation after the lighting test at 85 ° C. and 85% 3000 h is ⁇
- conductive particles in which a metal layer mainly composed of Ag is formed on the outermost surface of the resin particles solder particles having an average particle size smaller than that of the conductive particles, and solder particles
- the optical characteristics and heat dissipation characteristics of the LED mounted body could be improved.
- the average particle size of the solder particles is 20% or more and less than 100% of the average particle size of the conductive particles, so that the thermal resistance value is 15 ° C./W or less.
- the heat dissipation characteristics could be obtained.
- the average particle diameter of the light-reflective insulating particles is 2% or more and less than 30% of the average particle diameter of the solder particles, excellent optical characteristics with a reflectance of 50% or more can be obtained.
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Abstract
Description
1.異方性導電接着剤
2.接続構造体及びその製造方法
3.実施例
本実施の形態における異方性導電接着剤は、樹脂粒子の最表面にAgを主成分とする金属層が形成された導電性粒子と、導電性粒子よりも平均粒径が小さいはんだ粒子と、はんだ粒子よりも平均粒径が小さい光反射性絶縁粒子とがバインダー(接着剤成分)中に分散されたものであり、その形状は、ペースト、フィルムなどであり、目的に応じて適宜選択することができる。
次に、前述した異方性導電接着剤を用いた接続構造体について説明する。本実施の形態における接続構造体は、第1の電子部品と、第2の電子部品と、樹脂粒子の最表面にAgを主成分とする金属層が形成された導電性粒子と、導電性粒子よりも平均粒径が小さいはんだ粒子と、はんだ粒子よりも平均粒径が小さい光反射性絶縁粒子と、導電性粒子、はんだ粒子、及び光反射性絶縁粒子を分散させるバインダーとを含有する異方性導電接着剤により、第1の電子部品と第2の電子部品とを接着してなる異方性導電膜とを備え、第1の電子部品の端子と第2の電子部品の端子とが、導電性粒子を介して電気的に接続されてなるとともに、はんだ粒子によってはんだ接合されている。
以下、本発明の実施例について詳細に説明するが、本発明はこれらの実施例に限定されるものではない。本実施例では、光反射性の導電性粒子とはんだ粒子と白色無機フィラーとを配合した異方性導電接着剤(ACP)を作製し、反射率を評価した。また、LED実装体を作製し、全光束量、放熱特性、及び電気特性について評価した。
粒径5μmの球状アクリル樹脂にスパッタリング法により、Ag合金(商品名:GB100、COBELCO社製)を厚み0.25μmで形成し、粒径5.5μmの光反射性の導電性粒子Aを作製した。
エポキシ硬化系接着剤(エポキシ樹脂(商品名:CEL2021P、(株)ダイセル化学製)及び酸無水物(MeHHPA、商品名:MH700、新日本理化(株)製)を主成分としたバインダー)中に、光反射性の導電性粒子を2体積%、はんだ粒子を5体積%、及び、白色無機フィラーとして酸化チタンを10体積%配合し、異方性導電接着剤を作製した。はんだ粒子として、平均粒径(D50)が、0.8μm、1.1μm、5.0μm、及び20.0μmのものを準備した(商品名:M707(Sn-3.0Ag-0.5Cu)、mp:217℃、千住金属工業社製)。
白色板に異方性導電接着剤を厚み100μmとなるように塗布した後、200℃-1minの条件で加熱硬化した。硬化後の異方性導電膜の反射率を、分光光度計にて測定した。
異方性導電接着剤を用いてFC実装用LEDチップ(商品名:DA700、CREE社製、Vf=3.2V(If=350mA))をAu電極基板(セラミック基板、導体スペース=100μmP、Ni/Auメッキ=5.0/0.3μm)に搭載した。異方性導電接着剤をAu電極基板に塗布した後、LEDチップをアライメントして搭載し、260℃-10秒、荷重1000g/chipの条件で加熱圧着を行った。
積分球による全光束量測定装置(LE-2100、大塚電子(株))を用いて、LED実装体の全光束量を測定した。
過渡熱抵抗測定装置(T3STAR、Mentor Graphics社製)を用いて、0.1秒間点灯したときのLED実装体の熱抵抗値(℃/W)を測定した。測定条件はIf=350mA、Im=1mAで行った。
初期Vf値として、If=350mA時のVf値を測定した。また、85℃、85%RH環境下でLED実装体をIf=350mAで500時間点灯させ(高温高湿試験)、If=350mA時のVf値を測定した。なお、高温高湿試験は初期良品のみ行った。初期の評価は、リークが発生した場合を「×」、それ以外を「○」とした。高温高湿試験後の評価は、初期Vf値からの変動が5%以上の場合を「×」、初期Vf値からの変動が5%未満の場合を「○」とした。
表1に示すように、バインダーに対してNiめっき樹脂粒子の表面をAg合金(Ag:Bi:Nd=99:0.7:0.3)で被覆した外観が灰色の光反射性導電粒子(粒径(D50):5.5μm)と、はんだ粒子(粒径(D50):5.0μm)と、酸化チタン(粒径(D50):0.25μm)とを混合し、異方性導電接着剤を作製した。
表1に示すように、バインダーに対してNiめっき樹脂粒子の表面をAg合金(Ag:Bi:Nd=99:0.7:0.3)で被覆した外観が灰色の光反射性導電粒子(粒径(D50):5.5μm)と、はんだ粒子(粒径(D50):1.1μm)と、酸化チタン(粒径(D50):0.25μm)とを混合し、異方性導電接着剤を作製した。
表1に示すように、バインダーに対してNiめっき樹脂粒子の表面をAg合金(Ag:Bi:Nd=99:0.7:0.3)で被覆した外観が灰色の光反射性導電粒子(粒径(D50):5.5μm)と、はんだ粒子(粒径(D50):5.0μm)と、酸化チタン(粒径(D50):0.18μm)とを混合し、異方性導電接着剤を作製した。
表1に示すように、バインダーに対してNiめっき樹脂粒子の表面をAg合金(Ag:Bi:Nd=99:0.7:0.3)で被覆した外観が灰色の光反射性導電粒子(粒径(D50):5.5μm)と、はんだ粒子(粒径(D50):5.0μm)と、酸化チタン(粒径(D50):1.00μm)とを混合し、異方性導電接着剤を作製した。
表1に示すように、バインダーに対して球状樹脂粒子の表面をAg合金(Ag:Bi:Nd=99:0.7:0.3)で被覆した外観が灰色の光反射性導電粒子(粒径(D50):5.5μm)と、はんだ粒子(粒径(D50):5.0μm)と、酸化チタン(粒径(D50):0.25μm)とを混合し、異方性導電接着剤を作製した。
表1に示すように、バインダーに対して球状樹脂粒子の表面をAgで被覆した外観が茶色の光反射性導電粒子(粒径(D50):5.5μm)を混合し、異方性導電接着剤を作製した。
表1に示すように、バインダーに対してNiめっき樹脂粒子の表面をAg合金(Ag:Bi:Nd=99:0.7:0.3)で被覆した外観が灰色の光反射性導電粒子(粒径(D50):5.5μm)と、酸化チタン(粒径(D50):0.25μm)とを混合し、異方性導電接着剤を作製した。
表1に示すように、バインダーに対してNiめっき樹脂粒子の表面をAg合金(Ag:Bi:Nd=99:0.7:0.3)で被覆した外観が灰色の光反射性導電粒子(粒径(D50):5.5μm)と、はんだ粒子(粒径(D50):20.0μm)と、酸化チタン(粒径(D50):0.25μm)とを混合し、異方性導電接着剤を作製した。
表1に示すように、バインダーに対してNiめっき樹脂粒子の表面をAg合金(Ag:Bi:Nd=99:0.7:0.3)で被覆した外観が灰色の光反射性導電粒子(粒径(D50):5.5μm)と、はんだ粒子(粒径(D50):0.8μm)と、酸化チタン(粒径(D50):0.25μm)とを混合し、異方性導電接着剤を作製した。
表1に示すように、バインダーに対してNiめっき樹脂粒子の表面をAg合金(Ag:Bi:Nd=99:0.7:0.3)で被覆した外観が灰色の光反射性導電粒子(粒径(D50):5.5μm)と、はんだ粒子(粒径(D50):5.0μm)と、酸化チタン(粒径(D50):0.02μm)とを混合し、異方性導電接着剤を作製した。
表1に示すように、バインダーに対してNiめっき樹脂粒子の表面をAg合金(Ag:Bi:Nd=99:0.7:0.3)で被覆した外観が灰色の光反射性導電粒子(粒径(D50):5.5μm)と、はんだ粒子(粒径(D50):5.0μm)と、酸化チタン(粒径(D50):3.00μm)とを混合し、異方性導電接着剤を作製した。
Claims (15)
- 樹脂粒子の最表面にAgを主成分とする金属層が形成された導電性粒子と、
前記導電性粒子よりも平均粒径が小さいはんだ粒子と、
前記はんだ粒子よりも平均粒径が小さい光反射性絶縁粒子と、
前記導電性粒子、前記はんだ粒子、及び前記光反射性絶縁粒子を分散させるバインダーと
を含有する異方性導電接着剤。 - 前記はんだ粒子の平均粒径が、前記導電性粒子の平均粒径の20%以上100%未満である請求項1記載の異方性導電接着剤。
- 前記光反射性絶縁粒子の平均粒径が、前記はんだ粒子の平均粒径の2%以上30%未満である請求項1又は2記載の異方性導電接着剤。
- 前記はんだ粒子の配合量が、前記導電性粒子の配合量よりも大きく、
前記光反射性絶縁粒子の配合量が、前記はんだ粒子の配合量よりも多い請求項1又は2記載の異方性導電接着剤。 - 前記はんだ粒子の配合量が、前記導電性粒子の配合量よりも大きく、
前記光反射性絶縁粒子の配合量が、前記はんだ粒子の配合量よりも多い請求項3記載の異方性導電接着剤。 - 前記光反射性絶縁粒子が、酸化チタン、窒化ホウ素、酸化亜鉛及び酸化アルミニウムからなる群より選択される少なくとも1種である請求項1又は2記載の異方性導電接着剤。
- 前記光反射性絶縁粒子が、酸化チタン、窒化ホウ素、酸化亜鉛及び酸化アルミニウムからなる群より選択される少なくとも1種である請求項3記載の異方性導電接着剤。
- 前記光反射性絶縁粒子が、酸化チタン、窒化ホウ素、酸化亜鉛及び酸化アルミニウムからなる群より選択される少なくとも1種である請求項4記載の異方性導電接着剤。
- 前記Agを主成分とする金属層が、Agを95.0atm%以上99.8atm%以下、Biを0.1atm%以上3.0atm%以下、Ndを0.1atm%以上2.0atm%以下含有する請求項1又は2記載の異方性導電接着剤。
- 前記Agを主成分とする金属層が、Agを95.0atm%以上99.8atm%以下、Biを0.1atm%以上3.0atm%以下、Ndを0.1atm%以上2.0atm%以下含有する請求項3記載の異方性導電接着剤。
- 前記Agを主成分とする金属層が、Agを95.0atm%以上99.8atm%以下、Biを0.1atm%以上3.0atm%以下、Ndを0.1atm%以上2.0atm%以下含有する請求項4記載の異方性導電接着剤。
- 前記Agを主成分とする金属層が、Agを95.0atm%以上99.8atm%以下、Biを0.1atm%以上3.0atm%以下、Ndを0.1atm%以上2.0atm%以下含有する請求項6記載の異方性導電接着剤。
- 第1の電子部品と、
第2の電子部品と、
樹脂粒子の最表面にAgを主成分とする金属層が形成された導電性粒子と、前記導電性粒子よりも平均粒径が小さいはんだ粒子と、前記はんだ粒子よりも平均粒径が小さい光反射性絶縁粒子と、前記導電性粒子、前記はんだ粒子、及び前記光反射性絶縁粒子を分散させるバインダーとを含有する異方性導電接着剤により、前記第1の電子部品と前記第2の電子部品とを接着してなる異方性導電膜とを備え、
前記第1の電子部品の端子と前記第2の電子部品の端子とが、前記導電性粒子を介して電気的に接続されてなるとともに、前記はんだ粒子によってはんだ接合されてなる接続構造体。 - 前記第1の電子部品が、LED素子であり、
前記第2の電子部品が、基板である請求項13記載の接続構造体。 - 樹脂粒子の最表面にAgを主成分とする金属層が形成された導電性粒子と、前記導電性粒子よりも平均粒径が小さいはんだ粒子と、前記はんだ粒子よりも平均粒径が小さい光反射性絶縁粒子と、前記導電性粒子、前記はんだ粒子、及び前記光反射性絶縁粒子を分散させるバインダーとを含有する異方性導電接着剤を、第1の電子部品の端子と第2の電子部品の端子との間に挟み、第1の電子部品と第2の電子部品とを熱圧着する接続構造体の製造方法。
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| CN201580014903.8A CN106062119B (zh) | 2014-03-19 | 2015-02-13 | 各向异性导电粘接剂 |
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| US9893041B2 (en) * | 2016-04-15 | 2018-02-13 | Glo Ab | Method of forming an array of a multi-device unit cell |
| JP2018088498A (ja) * | 2016-11-29 | 2018-06-07 | デクセリアルズ株式会社 | 異方性導電接着剤 |
| KR102555383B1 (ko) * | 2016-12-07 | 2023-07-12 | 엘지디스플레이 주식회사 | 유기발광소자를 이용한 조명장치 및 그 제조방법 |
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| JP7014948B2 (ja) * | 2017-06-13 | 2022-02-02 | 日亜化学工業株式会社 | 発光装置の製造方法および発光装置 |
| CN109545814B (zh) * | 2017-09-21 | 2021-04-23 | 群创光电股份有限公司 | 显示装置 |
| US20190088196A1 (en) * | 2017-09-21 | 2019-03-21 | Innolux Corporation | Display device |
| JP7046351B2 (ja) | 2018-01-31 | 2022-04-04 | 三国電子有限会社 | 接続構造体の作製方法 |
| JP7160302B2 (ja) * | 2018-01-31 | 2022-10-25 | 三国電子有限会社 | 接続構造体および接続構造体の作製方法 |
| JP7185252B2 (ja) | 2018-01-31 | 2022-12-07 | 三国電子有限会社 | 接続構造体の作製方法 |
| JP6916525B2 (ja) * | 2018-02-06 | 2021-08-11 | 株式会社ブイ・テクノロジー | Ledディスプレイの製造方法 |
| EP3775082B1 (en) | 2018-03-28 | 2023-11-22 | Zoltek Corporation | Electrically conductive adhesive |
| TWI690947B (zh) * | 2018-11-30 | 2020-04-11 | 台灣愛司帝科技股份有限公司 | 導電物質的布局方法、布局結構及包含其之led顯示器 |
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| EP3121237A1 (en) | 2017-01-25 |
| CN106062119B (zh) | 2018-12-07 |
| EP3121237A4 (en) | 2017-10-18 |
| KR102339440B1 (ko) | 2021-12-14 |
| KR20160135700A (ko) | 2016-11-28 |
| US20170121571A1 (en) | 2017-05-04 |
| CN106062119A (zh) | 2016-10-26 |
| JP2015178555A (ja) | 2015-10-08 |
| TWI649765B (zh) | 2019-02-01 |
| US9670385B2 (en) | 2017-06-06 |
| TW201543502A (zh) | 2015-11-16 |
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