WO2018025903A1 - はんだペースト用フラックス、及び、はんだペースト - Google Patents
はんだペースト用フラックス、及び、はんだペースト Download PDFInfo
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- WO2018025903A1 WO2018025903A1 PCT/JP2017/028007 JP2017028007W WO2018025903A1 WO 2018025903 A1 WO2018025903 A1 WO 2018025903A1 JP 2017028007 W JP2017028007 W JP 2017028007W WO 2018025903 A1 WO2018025903 A1 WO 2018025903A1
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- WIPO (PCT)
- Prior art keywords
- solder paste
- mass
- fatty acid
- solder
- flux
- Prior art date
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/26—Selection of soldering or welding materials proper with the principal constituent melting at less than 400 degrees C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
-
- 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
- H05K3/34—Assembling printed circuits with electric components, e.g. with resistor electrically connecting electric components or wires to printed circuits by soldering
- H05K3/3489—Composition of fluxes; Methods of application thereof; Other methods of activating the contact surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/24—Selection of soldering or welding materials proper
- B23K35/30—Selection of soldering or welding materials proper with the principal constituent melting at less than 1550 degrees C
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3612—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with organic compounds as principal constituents
- B23K35/3615—N-compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K35/00—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting
- B23K35/22—Rods, electrodes, materials, or media, for use in soldering, welding, or cutting characterised by the composition or nature of the material
- B23K35/36—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest
- B23K35/3612—Selection of non-metallic compositions, e.g. coatings, fluxes; Selection of soldering or welding materials, conjoint with selection of non-metallic compositions, both selections being of interest with organic compounds as principal constituents
- B23K35/3618—Carboxylic acids or salts
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C13/00—Alloys based on tin
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C13/00—Alloys based on tin
- C22C13/02—Alloys based on tin with antimony or bismuth as the next major constituent
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/02—Alloys based on copper with tin as the next major constituent
-
- 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
Definitions
- the present invention relates to a solder paste flux and a solder paste formed using the solder paste flux.
- a solder paste containing solder powder and flux is applied to the electrode portion on the substrate surface, and the electrode portion of the bonding component is applied to the electrode portion.
- the substrate and the joining component are joined via the solder joint portion formed from the solder paste.
- solder alloy sold-free solder alloy
- solder powder using a lead-free solder alloy for example, a mixture of Sn-based metal particles made of Sn or Sn alloy and Cu-based metal particles made of Cu or Cu alloy has been proposed ( Patent Document 1).
- solder paste using such solder powder is heated to form the solder joint as described above, Sn-based metal particles having a melting point lower than that of the Cu-based metal particles are first melted.
- the molten Sn-based metal reacts with Cu on the surface of the Cu-based metal particles, so that an intermetallic compound (specifically, CuSn alloy) layer (hereinafter referred to as an IMC layer) is formed on the surface of the Cu-based metal particles.
- an intermetallic compound specifically, CuSn alloy
- the IMC layer has a melting point higher than that of the Sn-based metal, the solder joint is less likely to be remelted even when the solder joint is heated again. For this reason, even if it is a case where it is necessary to heat a joining structure again, the joining state in a solder joint part can be maintained favorably.
- voids are easily formed in the solder joint.
- a volatile component such as a flux is volatilized to generate a gas, which remains as bubbles in the Sn-based metal in which the gas is melted.
- a gas does not escape even when the Sn-based metal is cured, and remains in the solder joint portion to form a void. If many such voids are present in the solder joint portion, the contact area between the substrate and the joining component decreases, so that the electrical resistance increases and there is a risk of heat generation.
- an object of the present invention is to provide a solder paste flux capable of forming a solder joint with few voids and to provide a solder paste using the solder paste flux.
- the solder paste flux according to the present invention contains an organic component composed of a fatty acid and an aliphatic primary amine as a main component.
- the mass ratio of the organic component to the mass of the solder paste flux is preferably 70% by mass or more and 100% by mass or less.
- solder paste flux is configured such that a molar ratio of the fatty acid to the aliphatic primary amine is 1: 0.5 or more and 1.5 or less.
- the fatty acid is at least one of a saturated fatty acid and an unsaturated fatty acid, the saturated fatty acid has 10 or less carbon atoms in the main chain, and the unsaturated fatty acid has 18 or less carbon atoms. Preferably there is.
- the unsaturated fatty acid is preferably at least one selected from the group consisting of oleic acid, linoleic acid, and linolenic acid.
- the fatty acid is composed of saturated fatty acid and unsaturated fatty acid, and the ratio of the number of moles of unsaturated fatty acid to the total number of moles of saturated fatty acid and unsaturated fatty acid is 20 mol% or less. It is preferable.
- the aliphatic primary amine is at least one of a saturated aliphatic primary amine and an unsaturated aliphatic primary amine, and the saturated aliphatic primary amine has a main chain carbon number of 8 or less,
- the unsaturated aliphatic primary amine preferably has 18 or less carbon atoms.
- the unsaturated aliphatic primary amine is preferably oleylamine.
- solder paste according to the present invention contains any of the above solder paste fluxes and solder powder, and the solder powder includes Sn-based metal particles made of Sn or Sn alloy, and Cu or Cu. It contains at least one of Cu-based metal particles made of an alloy.
- the solder paste preferably has a solder paste flux content of 5% by mass to 12% by mass.
- the solder paste preferably has an average particle size of the solder powder of 5 ⁇ m to 35 ⁇ m.
- the solder paste flux according to the present invention contains an organic component composed of a fatty acid and an aliphatic primary amine as a main component.
- the mass ratio of the organic component to the mass of the solder paste flux is preferably 65% by mass or more and 100% by mass or less, and more preferably 70% by mass or more and 100% by mass or less.
- the molar ratio of the fatty acid to the aliphatic primary amine is preferably 1: 0.5 or more and 1.5 or less, more preferably 1: 0.7 or more and 1.3 or less. : 1 is particularly preferred.
- the fatty acid it is preferable to use a fatty acid at room temperature.
- normal temperature means the temperature of 25 degreeC or more and 30 degrees C or less.
- the fatty acid is preferably one that does not vaporize to the temperature at which the solder paste is reflowed.
- the boiling point is preferably 140 ° C. or higher and 400 ° C. or lower, more preferably 200 ° C. or higher and 360 ° C. or lower. It is particularly preferably 230 ° C. or higher and 270 ° C. or lower.
- the fatty acid is preferably at least one of a saturated fatty acid and an unsaturated fatty acid.
- the saturated fatty acid is not particularly limited, and, for example, one having 10 or less carbon atoms in the main chain is preferable, and one having 9 or less is more preferable.
- the saturated fatty acid includes at least one selected from the group consisting of octanoic acid, nonanoic acid, decanoic acid, 4-methylnonanoic acid, and 2-hexyldecanoic acid.
- the unsaturated fatty acid is not particularly limited, and for example, those having 24 or less carbon atoms are preferred, and those having 18 or less are more preferred.
- examples of the unsaturated fatty acid include at least one selected from the group consisting of oleic acid, linoleic acid, and linolenic acid.
- the ratio of the number of moles of the unsaturated fatty acid to the total number of moles of the saturated fatty acid and the unsaturated fatty acid is preferably 20 mol% or less, and 10 mol%. The following is more preferable.
- an aliphatic primary amine that is liquid at room temperature.
- the aliphatic primary amine preferably has a boiling point of 70 ° C. or higher and 400 ° C. or lower, and more preferably 75 ° C. or higher and 180 ° C. or lower.
- the aliphatic primary amine is preferably at least one of a saturated aliphatic primary amine and an unsaturated aliphatic primary amine.
- the saturated aliphatic primary amine is not particularly limited, and for example, those having a main chain having 8 or less carbon atoms are preferred, and those having 6 or less are more preferred.
- the saturated aliphatic primary amine includes at least one selected from the group consisting of butylamine, hexylamine, octylamine, and 2-ethylhexylamine.
- the unsaturated aliphatic primary amine is not particularly limited, and for example, those having 18 or less carbon atoms are preferable.
- an oleylamine is mentioned as an unsaturated aliphatic primary amine.
- the solder paste flux as described above may contain components other than the above fatty acids and aliphatic primary amines.
- a solvent or a thixotropic agent may be contained for the purpose of adjusting the viscosity.
- the solvent is not particularly limited.
- diethylene glycol monohexyl ether hexyl diglycol
- diethylene glycol dibutyl ether diethylene glycol mono 2-ethylhexyl ether (2 ethylhexyl diglycol)
- diethylene glycol monobutyl ether Glycol ethers such as (butyldiglycol); aliphatic compounds such as n-hexane, isohexane and n-heptane; esters such as isopropyl acetate, methyl propionate and ethyl propionate; methyl ethyl ketone and methyl-n-propyl ketone , Ketones such as diethyl ketone; alcohols such as ethanol, n-propanol, isopropanol, isobutanol, and octanediol , Terpineol, menthol, phen
- the said solvent may be used independently and may be used in mixture of multiple types.
- the amount of the solvent used is not particularly limited, and is preferably 0% by mass or more and 20% by mass or less, and preferably 0% by mass or more and 16% by mass with respect to the mass of the solder paste flux. The following is more preferable.
- the thixotropic agent is not particularly limited, and examples thereof include amide type thixotropic agents, hardened castor oil, beeswax, carnauba wax, and higher fatty acid amides such as stearamide.
- the amount of the thixotropic agent is not particularly limited, and is preferably 0% by mass or more and 20% by mass or less, and preferably 0% by mass or more and 16% by mass with respect to the mass of the solder paste flux. % Or less is more preferable.
- the solder paste flux as described above is kneaded with solder powder to form a solder paste.
- the mass ratio of the solder paste flux to the mass of the solder paste is not particularly limited, and is preferably 5% by mass or more and 12% by mass or less, for example, 5.5% by mass or more and 8% by mass or less. More preferably, it is more preferably 5.5% by mass or more and 6% by mass or less.
- the viscosity of the solder paste is not particularly limited, and can be adjusted according to the supply method such as printing and dispensing. For example, it is preferably 10 Pa ⁇ s or more and 350 Pa ⁇ s or less, and more preferably 100 Pa ⁇ s or more and 300 Pa ⁇ s or less.
- the viscosity is measured based on a viscosity value at 10 rpm using a spiral type viscosity measuring device (PCU-205 manufactured by Malcolm).
- the solder powder is not particularly limited, and general solder powder can be used.
- Sn-Ag solder, Sn-Ag-Cu solder, Sn-Ag-Cu-Bi solder, Sn-Ag-In-Bi solder, Sn-Cu solder used as lead-free solder, Metal powder constituting lead-free solder such as Sn—Zn solder, Sn—Bi solder, Sn—Sb solder, Sn—Au solder, Sn—In solder can be used.
- the solder powder it is preferable to use a mixture of Sn-based metal particles made of Sn or Sn alloy and Cu-based metal particles made of Cu or Cu alloy (hereinafter also referred to as SnCu solder powder). .
- the Sn-based metal particles may be Sn particles composed of 100% by mass of Sn, or one or more selected from the group consisting of Sn and In, Ag, Cu, Sb, Ni, Ge, Fe, Co, and Bi.
- Sn alloy particles made of other metals.
- the Sn alloy particles preferably include those having a composition of Sn—Ag, Sn—Cu, Sn—Sb, or Sn—Ag—Cu.
- the Sn-based metal particles preferably have an average particle diameter D50 (median diameter) of 1 ⁇ m or more and 70 ⁇ m or less, and more preferably 5 ⁇ m or more and 35 ⁇ m or less.
- the Sn-based metal particles preferably have a 90% particle diameter D90 of 100 ⁇ m or less, and more preferably 60 ⁇ m or less.
- the Cu metal particles include Cu particles composed of 100% by mass of Cu, or Cu alloy particles composed of Cu and one or more other metals selected from the group consisting of In, Ag, Sn, and Bi. Can be mentioned.
- the Cu alloy particles preferably include those having a composition of Cu—Ag—Sn—Bi—In.
- the average particle diameter D50 (median diameter) of the Cu-based metal particles is preferably 1 ⁇ m or more and 70 ⁇ m or less, and more preferably 5 ⁇ m or more and 35 ⁇ m or less.
- the Cu-based metal particles preferably have a 90% particle diameter D90 of 100 ⁇ m or less, and more preferably 60 ⁇ m or less.
- average particle diameter D50 (median diameter)
- 90% particle diameter D90 are values measured by a laser diffraction particle size distribution measuring apparatus.
- the mixing ratio of the Sn-based metal particles and the Cu-based metal particles is not particularly limited.
- the Sn-based metal particles are preferably 35% by mass or more and 85% by mass or less, and more preferably 50% by mass or more and 65% by mass or less.
- the Cu-based metal particles are preferably 15% by mass or more and 65% by mass or less, and more preferably 35% by mass or more and 50% by mass or less.
- the metal particles constituting the solder powder as described above may further include other metal particles in addition to the Sn-based metal particles and the Cu-based metal particles.
- grain the metal particle containing Ni etc. is mentioned, for example.
- Such other metal particles preferably have a content of 1% by mass to 20% by mass with respect to the mass of the solder powder.
- solder paste flux and the solder paste according to the present invention it is possible to form a solder joint with few voids.
- solder paste formed by kneading a solder paste flux containing a fatty acid and an organic component composed of an aliphatic primary amine as a main component and solder powder, a bonding component such as an electronic component is formed on a substrate. It is possible to reduce the occurrence of voids in the solder joints when bonded to each other.
- solder paste flux and the solder paste according to the present invention are not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention. Further, the configurations and methods of the plurality of embodiments described above may be arbitrarily adopted and combined (even if the configurations and methods according to one embodiment are applied to the configurations and methods according to other embodiments). Of course.
- Aliphatic primary amine butylamine (manufactured by Tokyo Chemical Industry Co., Ltd., product name: butylamine) ⁇ Hexylamine (manufactured by Tokyo Chemical Industry Co., Ltd., product name: hexylamine) ⁇ 2-Ethylhexylamine (product name: 2-ethylhexylamine, manufactured by Guangei Chemical Industry Co., Ltd.) ⁇ Octylamine (product name: n-octylamine, manufactured by Tokyo Chemical Industry Co., Ltd.) ⁇ Oleylamine (manufactured by Tokyo Chemical Industry Co., Ltd., product name: oleylamine) 3.
- Resin component / Super light rosin (Arakawa Chemicals, product name: KR-612) ⁇ Disproportionated rosin (Arakawa Chemical Co., Ltd., product name: Longis R) 4).
- Solvent, hexyl diglycol (manufactured by Nippon Emulsifier Co., Ltd., product name: HeDG) ⁇ Tarpineol (Product name: Turpineol, manufactured by Yashara Chemical Co., Ltd.) 5).
- Thixotropic agent N′-hexamethylene-bis-12-hydroxystearylamide product name: J-630, manufactured by Ito Oil Co., Ltd.
- -Castor hydrogenated oil manufactured by Ito Oil Co., Ltd., product name: castor hydrogenated oil
- Honey wax Honey wax (Miki Chemical Industry Co., Ltd., product name: red bee bleached beeswax) 6
- Activator, adipic acid product name: adipic acid, manufactured by Tokyo Chemical Industry Co., Ltd.
- Trans-2,3-dibromo-2-butene-1,4-diol manufactured by JAIN SPECIALITY FINE CHEMICALS, product name: DBBD
- Solder powder 1 A material comprising Sn-based metal particles made of Sn (average particle size: 19.8 ⁇ m) and Cu-based metal particles made of Cu alloy (average particle size: 11.7 ⁇ m) was used.
- the composition of the Cu alloy was 65 mass% Cu, 15 mass% Sn, 10 mass% Ag, 5 mass% Bi, and 5 mass% In.
- the mass ratio of each particle to the mass of the solder powder was 65 mass% for the Sn-based metal particles and 35 mass% for the Cu-based metal particles.
- said average particle diameter (D50) is measured by the laser diffraction particle size distribution measuring apparatus by Beckman Coulter. 8).
- Solder powder 2 First Sn-based metal particles made of Sn (average particle size: 19.8 ⁇ m), second Sn-based metal particles made of Sn alloy (average particle size: 30.8 ⁇ m), and Cu-based metal made of Cu alloy And particles (average particle size: 11.7 ⁇ m).
- the composition of the Sn alloy was 95% by mass for Sn and 5% by mass for Sb.
- the composition of the Cu alloy was 65 mass% Cu, 15 mass% Sn, 10 mass% Ag, 5 mass% Bi, and 5 mass% In.
- the mass ratio of each particle to the mass of the solder powder is 32.5 mass% for the first Sn-based metal particles, 32.5 mass% for the second Sn-based metal particles, and 35 mass% for the Cu-based metal particles. %.
- said average particle diameter (D50) is measured by the laser diffraction particle size distribution measuring apparatus by Beckman Coulter.
- Solder powder 3 First Sn-based metal particles made of Sn (average particle size: 19.8 ⁇ m), second Sn-based metal particles made of Sn alloy (average particle size: 28.4 ⁇ m), and Cu-based metal made of Cu alloy And particles (average particle size: 11.7 ⁇ m).
- Ag was 1.1 mass%
- Cu was 0.7 mass%
- Ni was 0.07 mass%
- Ge was 0.01 mass%
- the balance was only Sn.
- the mass ratio of each particle to the mass of the solder powder is 32.5 mass% for the first Sn-based metal particles, 32.5 mass% for the second Sn-based metal particles, and 35 mass% for the Cu-based metal particles. %.
- said average particle diameter (D50) is measured by the laser diffraction particle size distribution measuring apparatus by Beckman Coulter. 10.
- Solder powder 4 A material comprising Sn-based metal particles (average particle size: 19.8 ⁇ m) made of Sn and Cu-based metal particles (average particle size: 1.1 ⁇ m) made of Cu was used.
- the mass ratio of each particle to the mass of the solder powder was 65 mass% for the Sn-based metal particles and 35 mass% for the Cu-based metal particles.
- said average particle diameter (D50) is measured by the laser diffraction particle size distribution measuring apparatus by Beckman Coulter. 11.
- Solder powder 5 A material comprising Sn-based metal particles made of Sn (average particle size: 19.8 ⁇ m) and Cu-based metal particles made of Cu alloy (average particle size: 11.7 ⁇ m) was used.
- the composition of the Cu alloy was 65 mass% Cu, 15 mass% Sn, 10 mass% Ag, 5 mass% Bi, and 5 mass% In.
- the mass ratio of each particle with respect to the mass of the solder powder was 50 mass% for Sn-based metal particles and 50 mass% for Cu-based metal particles.
- said average particle diameter (D50) is measured by the laser diffraction particle size distribution measuring apparatus by Beckman Coulter.
- Solder powder 6 A material comprising Sn-based metal particles made of Sn (average particle size: 19.8 ⁇ m) and Cu-based metal particles made of Cu alloy (average particle size: 11.7 ⁇ m) was used.
- the composition of the Cu alloy was 65 mass% Cu, 15 mass% Sn, 10 mass% Ag, 5 mass% Bi, and 5 mass% In.
- the mass ratio of each particle with respect to the mass of the solder powder was 40 mass% for Sn-based metal particles and 60 mass% for Cu-based metal particles.
- said average particle diameter (D50) is measured by the laser diffraction particle size distribution measuring apparatus by Beckman Coulter. 13.
- Solder powder 7 A material comprising Sn-based metal particles (average particle size: 7.3 ⁇ m) made of Sn and Cu-based metal particles (average particle size: 9.6 ⁇ m) made of a Cu alloy was used.
- the composition of the Cu alloy was 65 mass% Cu, 15 mass% Sn, 10 mass% Ag, 5 mass% Bi, and 5 mass% In.
- the mass ratio of each particle to the mass of the solder powder was 65 mass% for the Sn-based metal particles and 35 mass% for the Cu-based metal particles.
- said average particle diameter (D50) is measured by the laser diffraction particle size distribution measuring apparatus by Beckman Coulter.
- Solder powder 8 What consists of the Sn-type metal particle
- the composition of the Sn alloy was 96.5% by mass of Sn, 3.0% by mass of Ag, and 0.5% by mass of Cu.
- said average particle diameter (D50) is measured by the laser diffraction particle size distribution measuring apparatus by Beckman Coulter.
- solder paste was prepared by kneading the flux of Comparative Example 1 and the above-described solder powder 1 with the composition shown in Table 2 below.
- Voids were evaluated under the same conditions as in Comparative Example 1 except that test specimens were prepared using the solder pastes prepared as described above.
- the void ratio of each example is shown in Tables 7 and 8 below.
- ⁇ Test 2 (Examples 25 to 48)> 1. Production of Flux Flux was produced in the same manner as in Test 1 except that each fatty acid and each aliphatic primary amine were used in the combinations shown in Table 9 below.
- ⁇ Test 3 (Examples 49 to 55)> 1. Production of Flux Flux was produced in the same manner as in Test 1 except that fatty acids and aliphatic primary amines were used in the combinations shown in Table 12 below and the molar ratio of fatty acids was as shown in Table 12 below.
- ⁇ Test 4 (Examples 56 to 60)> 1.
- Production of Flux and Solder Paste A solder paste was produced in the same manner as in Test 1 except that the flux of Example 30 of Test 2 was produced and the flux was used and blended as shown in Table 13 below.
- Voids were evaluated under the same conditions as in Comparative Example 1 except that test specimens were prepared using the solder pastes prepared as described above.
- the void ratio of each example is shown in Table 13 below.
- ⁇ Test 5 (Examples 61 to 67)> 1.
- Preparation of Flux and Solder Paste Soldering was performed in the same manner as in Test 1 except that the fluxes of Examples 26 and 30 in Test 2 were prepared and solder fluxes 2 to 7 were used as shown in Table 14 below. A paste was prepared.
- Voids were evaluated under the same conditions as in Comparative Example 1 except that test specimens were prepared using the solder pastes prepared as described above.
- the void ratio of each example is shown in Table 14 below.
- ⁇ Test 7 (Example 70)> 1. Production of Flux Flux was produced in the same manner as in Test 1 except that fatty acids and aliphatic primary amines were used in the combinations shown in Table 16 below, and the molar fraction of aliphatic primary amines was as shown in Table 16 below.
- solder paste was prepared in the same manner as in Test 1 except that the above flux was used.
- voids were evaluated under the same conditions as in Comparative Example 1 except that a test specimen was produced using the solder paste produced as described above.
- the void fraction of Example 70 is shown in Table 16 below.
- solder paste was prepared in the same manner as in Test 1 except that the above flux was used.
- voids were evaluated under the same conditions as in Comparative Example 1 except that a test specimen was produced using the solder paste produced as described above.
- the void ratio of each example is shown in Table 17 below.
- Example 73 > 1. Production of Flux Flux was produced in the same manner as in Test 1 except that the composition of the flux was as shown in Table 18 below. 2. Preparation of Solder Paste and Evaluation of Void A solder paste was prepared in the same manner as in Test 1 except that the above flux was used and the composition shown in Table 19 below was used. In addition, voids were evaluated under the same conditions as in Comparative Example 1 except that a test specimen was produced using the solder paste produced as described above. The void fraction of Example 73 is shown in Table 18 below.
- Example 74 Production of Flux and Solder Paste of Example 74 A solder paste was produced in the same manner as in Test 1 except that the flux of Example 6 was produced and the flux and solder powder 8 were used.
- Examples 1 to 3, 5 to 7, and 9 to 11 in Tables 7 and 8 were compared with Examples 4, 8, and 12 to 24, Examples 1 to 3, 5 to 7, and 9 to 11 were compared. It can be seen that the void fraction is effectively reduced. That is, the void ratio can be more effectively reduced by using a fatty acid having a main chain having 10 or less carbon atoms and using an aliphatic primary amine having a main chain having 8 or less carbon atoms.
- each Example has a lower void ratio. That is, the void ratio can be reduced even when a fatty acid having a low boiling point (10 or less carbon atoms) and a fatty acid having a high boiling point (18 carbon atoms) are used in combination.
- the void ratios of Examples 49 to 52 shown in Table 12 are compared with the void ratios of Examples 53 to 55, it is recognized that the void ratios of Examples 49 to 52 are lower. That is, the void ratio can be more effectively reduced when the ratio of the number of moles of unsaturated fatty acid to the total number of moles of saturated fatty acid and unsaturated fatty acid is 20 mol% or less.
- each Example has a lower void ratio. That is, by using the solder paste flux of the present invention, the void ratio can be reduced without being affected by the flux content in the solder paste. Particularly, when the content of the solder paste flux is 5.5% by mass or more and 6% by mass or less, the void ratio can be more effectively reduced.
- each Example has a lower void ratio. That is, by using the solder paste flux of the present invention, the void ratio can be reduced without being affected by the type of metal particles, the mixing ratio, and the particle size range.
- each Example has a lower void ratio. That is, in the solder paste flux of the present invention, the void ratio can be reduced by configuring the molar ratio of the fatty acid and the aliphatic primary amine to be 1: 0.5 or more and 1.5 or less. .
- Example 70 has a lower void ratio. That is, even when an aliphatic primary amine having a low boiling point (10 or less carbon atoms) and an aliphatic primary amine having a high boiling point (18 carbon atoms) are used in combination, the void ratio can be reduced.
- each Example has a lower void ratio. That is, in the solder paste flux of the present invention, even when the fatty acid and the aliphatic primary amine are branched, the void ratio can be reduced.
- Example 73 has a lower void ratio. That is, in the solder paste flux of the present invention, the void ratio can be reduced by containing the fatty acid and the aliphatic primary amine as the main components.
- Example 74 has a lower void ratio. That is, the solder paste flux of the present invention can reduce the void ratio even when the solder paste is made using solder powder made of only Sn-based metal particles.
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Abstract
Description
1.脂肪酸
・オクタン酸(東京化成工業社製、製品名:n-オクタン酸)
・ノナン酸(東京化成工業社製、製品名:ノナン酸)
・4-メチルノナン酸(東京化成工業社製、製品名:4-メチルノナン酸)
・デカン酸(東京化成工業社製、製品名:デカン酸)
・ステアリン酸(東京化成工業社製、製品名:ステアリン酸)
・オレイン酸(和光純薬工業社製、製品名:オレイン酸)
・リノール酸(ALDRICH社製、製品名:リノール酸)
・リノレン酸(東京化成工業社製、製品名:リノレン酸)
・2-ヘキシルデカン酸(東京化成工業社製、製品名:2-ヘキシルデカン酸)
2.脂肪族一級アミン
・ブチルアミン(東京化成工業社製、製品名:ブチルアミン)
・ヘキシルアミン(東京化成工業社製、製品名:ヘキシルアミン)
・2-エチルヘキシルアミン(広栄化学工業社製、製品名:2-エチルヘキシルアミン)
・オクチルアミン(東京化成工業社製、製品名:n-オクチルアミン)
・オレイルアミン(東京化成工業社製、製品名:オレイルアミン)
3.樹脂成分
・超淡色ロジン(荒川化学社製、製品名:KR-612)
・不均化ロジン(荒川化学社製、製品名:ロンジスR)
4.溶剤
・ヘキシルジグリコール(日本乳化剤社製、製品名:HeDG)
・ターピネオール(ヤスハラケミカル社製、製品名:ターピネオール)
5.チキソ剤
・N.N’-ヘキサメチレン-ビス-12-ヒドロキシステアリルアミド(伊藤製油社製、製品名:J-630)
・ひまし硬化油(伊藤製油社製、製品名:ひまし硬化油)
・ハニーワックス(三木化学工業社製、製品名:赤印晒蜜蝋)
6.活性剤
・アジピン酸(東京化成工業社製、製品名:アジピン酸)
・trans-2,3-ジブロモ-2-ブテン-1,4-ジオール(JAIN SPECIALITY FINE CHEMICALS社製、製品名:DBBD)
7.はんだ粉1
SnからなるSn系金属の粒子(平均粒径:19.8μm)と、Cu合金からなるCu系金属の粒子(平均粒径:11.7μm)とからなるものを用いた。Cu合金の組成は、Cuが65質量%、Snが15質量%、Agが10質量%、Biが5質量%、Inが5質量%とした。また、はんだ粉の質量に対する各粒子の質量割合は、Sn系金属の粒子が65質量%であり、Cu系金属の粒子が35質量%とした。なお、上記の平均粒径(D50)は、ベックマンコールター製レーザー回折粒度分布測定装置によって測定されるものである。
8.はんだ粉2
Snからなる第一Sn系金属の粒子(平均粒径:19.8μm)と、Sn合金からなる第二Sn系金属の粒子(平均粒径:30.8μm)と、Cu合金からなるCu系金属の粒子(平均粒径:11.7μm)とからなるものを用いた。Sn合金の組成は、Snが95質量%、Sbが5質量%とした。Cu合金の組成は、Cuが65質量%、Snが15質量%、Agが10質量%、Biが5質量%、Inが5質量%とした。また、はんだ粉の質量に対する各粒子の質量割合は、第一Sn系金属の粒子が32.5質量%、第二Sn系金属の粒子が32.5質量%、Cu系金属の粒子が35質量%とした。なお、上記の平均粒径(D50)は、ベックマンコールター製レーザー回折粒度分布測定装置によって測定されるものである。
9.はんだ粉3
Snからなる第一Sn系金属の粒子(平均粒径:19.8μm)と、Sn合金からなる第二Sn系金属の粒子(平均粒径:28.4μm)と、Cu合金からなるCu系金属の粒子(平均粒径:11.7μm)とからなるものを用いた。Sn合金の組成は、Agが1.1質量%、Cuが0.7質量%、Niが0.07質量%、Geが0.01質量%、残部がSnのみとした。また、はんだ粉の質量に対する各粒子の質量割合は、第一Sn系金属の粒子が32.5質量%、第二Sn系金属の粒子が32.5質量%、Cu系金属の粒子が35質量%とした。なお、上記の平均粒径(D50)は、ベックマンコールター製レーザー回折粒度分布測定装置によって測定されるものである。
10.はんだ粉4
SnからなるSn系金属の粒子(平均粒径:19.8μm)と、CuからなるCu系金属の粒子(平均粒径:1.1μm)とからなるものを用いた。また、はんだ粉の質量に対する各粒子の質量割合は、Sn系金属の粒子が65質量%であり、Cu系金属の粒子が35質量%とした。なお、上記の平均粒径(D50)は、ベックマンコールター製レーザー回折粒度分布測定装置によって測定されるものである。
11.はんだ粉5
SnからなるSn系金属の粒子(平均粒径:19.8μm)と、Cu合金からなるCu系金属の粒子(平均粒径:11.7μm)とからなるものを用いた。Cu合金の組成は、Cuが65質量%、Snが15質量%、Agが10質量%、Biが5質量%、Inが5質量%とした。また、はんだ粉の質量に対する各粒子の質量割合は、Sn系金属の粒子が50質量%であり、Cu系金属の粒子が50質量%とした。なお、上記の平均粒径(D50)は、ベックマンコールター製レーザー回折粒度分布測定装置によって測定されるものである。
12.はんだ粉6
SnからなるSn系金属の粒子(平均粒径:19.8μm)と、Cu合金からなるCu系金属の粒子(平均粒径:11.7μm)とからなるものを用いた。Cu合金の組成は、Cuが65質量%、Snが15質量%、Agが10質量%、Biが5質量%、Inが5質量%とした。また、はんだ粉の質量に対する各粒子の質量割合は、Sn系金属の粒子が40質量%であり、Cu系金属の粒子が60質量%とした。なお、上記の平均粒径(D50)は、ベックマンコールター製レーザー回折粒度分布測定装置によって測定されるものである。
13.はんだ粉7
SnからなるSn系金属の粒子(平均粒径:7.3μm)と、Cu合金からなるCu系金属の粒子(平均粒径:9.6μm)とからなるものを用いた。Cu合金の組成は、Cuが65質量%、Snが15質量%、Agが10質量%、Biが5質量%、Inが5質量%とした。また、はんだ粉の質量に対する各粒子の質量割合は、Sn系金属の粒子が65質量%であり、Cu系金属の粒子が35質量%とした。なお、上記の平均粒径(D50)は、ベックマンコールター製レーザー回折粒度分布測定装置によって測定されるものである。
14.はんだ粉8
Sn合金からなるSn系金属の粒子(平均粒径:28.8μm)からなるものを用いた。Sn合金の組成は、Snが96.5質量%、Agが3.0質量%、Cuが0.5質量%とした。なお、上記の平均粒径(D50)は、ベックマンコールター製レーザー回折粒度分布測定装置によって測定されるものである。
1.フラックスの作製
上記の樹脂成分、活性剤、チキソ剤、溶剤を下記表1の配合で混練してフラックス(比較例1)を作製した。
比較例1のフラックスと上記のはんだ粉1とを下記表2の配合で混練してはんだペーストを作製した。
(1)疑似基板の作製
Cu板(過硫酸アンモニウムエッチング処理をしたもの)に、比較例1のはんだペーストを、60μmの厚みでマスク開口率が100%となるように印刷し、疑似基板を作製した。
(2)加熱処理
得られた疑似基板を、高温観察装置(山陽精工社製、SK-5000)を用いて加熱処理した。加熱処理の温度条件としては、熱処理開始(常温)から120℃までを1.6℃/秒で昇温し、その後120℃を300秒間維持し、120℃から常温までを0.8℃/秒で冷却する条件とした(温度プロファイル1)。また、加熱処理は、酸素濃度が500ppm以下の窒素雰囲気下で行った。
温度プロファイル1で加熱処理した後の疑似基板のはんだペースト上にSiチップ(サイズ:0.3×5.0×5.0)を重ねて0.4MPaで加圧した状態で、温度プロファイル1とは異なる温度条件で加熱処理を行い、試験体を得た。加熱処理の温度条件としては、熱処理開始(常温)から150℃までを2.1℃/秒で昇温し、150℃から180℃までを0.25℃/秒で昇温し、180℃から250℃までを2℃/秒で昇温し、その後250℃を60秒間維持し、250℃から常温までを3.8℃/秒で冷却する条件とした(温度プロファイル2)。
(3)ボイド率の算出
そして、得られた試験体をSiチップを備える位置で切断し、その断面を観察することで、ボイド率(空隙率)を算出した。具体的には、ハイロックス社製デジタルマイクロスコープKH-8700を用いてボイド部分の面積を算出し、接合部全体の面積部で除してボイド率を算出した。算出されたボイド率については、下記表3に示す。
1.フラックスの作製
各脂肪酸と各脂肪族一級アミンとを下記表4の組合せで使用し、下記表5の配合で混練してフラックスを作製した。
上記の実施例1~24の各フラックスと上記のはんだ粉1とを下記表6の配合で混練してはんだペーストを作製した。
上記のように作製した各はんだペーストを用いて試験体を作製したこと以外は、比較例1と同一条件で、ボイドの評価を行った。各実施例のボイド率は、下記表7,8に示す。
1.フラックスの作製
各脂肪酸と各脂肪族一級アミンとを下記表9の組合せで使用したこと以外は、試験1と同様にフラックスを作製した。
上記の実施例25~48の各フラックスを用いたこと以外は、試験1と同様にはんだペーストを作製した。
また、上記のように作製した各はんだペーストを用いて試験体を作製したこと以外は、比較例1と同一条件で、ボイドの評価を行った。各実施例のボイド率は、下記表10,11に示す。
1.フラックスの作製
下記表12の組合せで脂肪酸と脂肪族一級アミンとを使用し、脂肪酸のモル比を下記表12の通りとしたこと以外は、試験1と同様にフラックスを作製した。
上記の実施例49~55の各フラックスを用いたこと以外は、試験1と同様にはんだペーストを作製した。
また、上記のように作製した各はんだペーストを用いて試験体を作製したこと以外は、比較例1と同一条件で、ボイドの評価を行った。各実施例のボイド率は、下記表12に示す。
1.フラックス、及び、はんだペーストの作製
試験2の実施例30のフラックスを作製し、該フラックスを用いて下記表13の配合としたこと以外は、試験1と同様にはんだペーストを作製した。
上記のように作製した各はんだペーストを用いて試験体を作製したこと以外は、比較例1と同一条件で、ボイドの評価を行った。各実施例のボイド率は、下記表13に示す。
1.フラックス、及び、はんだペーストの作製
試験2の実施例26,30のフラックスを作製し、該フラックスと、下記表14のようにはんだ粉2~7を用いたこと以外は、試験1と同様にはんだペーストを作製した。
上記のように作製した各はんだペーストを用いて試験体を作製したこと以外は、比較例1と同一条件で、ボイドの評価を行った。各実施例のボイド率は、下記表14に示す。
1.フラックス、及び、はんだペーストの作製
フラックスの配合が下記表15に記載の配合となるようにしたこと以外は、試験1と同様にはんだペーストを作製した。
下記表15の配合で作製したはんだペーストを用いて試験体を作製したこと以外は、比較例1と同一条件で、ボイドの評価を行った。各実施例のボイド率は、下記表15に示す。
1.フラックスの作製
下記表16の組合せで脂肪酸と脂肪族一級アミンとを使用し、脂肪族一級アミンのモル分率を下記表16の通りとしたこと以外は、試験1と同様にフラックスを作製した。
上記のフラックスを用いたこと以外は、試験1と同様にはんだペーストを作製した。
また、上記のように作製したはんだペーストを用いて試験体を作製したこと以外は、比較例1と同一条件で、ボイドの評価を行った。実施例70のボイド率は、下記表16に示す。
1.フラックスの作製
フラックスの配合が下記表17に記載の配合としたこと以外は、試験1と同様にフラックスを作製した。
上記のフラックスを用いたこと以外は、試験1と同様にはんだペーストを作製した。
また、上記のように作製したはんだペーストを用いて試験体を作製したこと以外は、比較例1と同一条件で、ボイドの評価を行った。各実施例のボイド率は、下記表17に示す。
1.フラックスの作製
フラックスの配合が下記表18に記載の配合となるようにしたこと以外は、試験1と同様にフラックスを作製した。
2.はんだペーストの作製と、ボイドの評価
上記のフラックスを用い、下記表19に記載の配合となるようにしたこと以外は、試験1と同様にはんだペーストを作製した。
また、上記のように作製されたはんだペーストを用いて試験体を作製したこと以外は、比較例1と同一条件で、ボイドの評価を行った。実施例73のボイド率は、下記表18に示す。
1.比較例2のフラックス、及び、はんだペーストの作製
比較例1のフラックスを作製し、該フラックスと、はんだ粉8とを用いたこと以外は、比較例1と同様にはんだペーストを作製した。
実施例6のフラックスを作製し、該フラックスと、はんだ粉8とを用いたこと以外は、試験1と同様にはんだペーストを作製した。
(1)疑似基板の作製
FR-4樹脂基板(OSP処理をしたもの)に、上記の各はんだペーストを、120μmの厚みでマスク開口率が100%となるように印刷し、疑似基板を作製した。
(2)加熱処理
得られた疑似基板のはんだペースト上にPwTrチップを重ね、はんだリフロー装置(エイテック製、NIS-20-82-C)を用いて酸素濃度1000ppmの窒素雰囲気下で加熱処理を行い、試験体を得た。加熱処理の温度条件としては、熱処理開始(常温)から180℃までを1.5℃/秒で昇温し、その後180℃を100秒間維持した。その後180℃から250℃までを2.0℃/秒で昇温し、250℃を15秒間維持した後、250℃から常温までを3.0/秒で冷却する条件とした(温度プロファイル3)。
(3)ボイド率の算出
そして、加熱処理後の試験体をPwTrチップを備える位置で切断し、その断面を観察することで、ボイド率(空隙率)を算出した。具体的には、ハイロックス社製デジタルマイクロスコープKH-8700を用いてボイド部分の面積を算出し、接合部全体の面積部で除してボイド率を算出した。算出されたボイド率については、下記表20に示す。
表3に示す比較例1のボイド率と、表7,8,10~18に示す実施例1~73のボイド率とを比較すると、各実施例の方がボイド率が低いことが認められる。つまり、脂肪酸と、脂肪族一級アミンとからなる有機成分を主成分として含有したはんだペースト用フラックスを用いることで、ボイド率の低減を図ることができる。
Claims (11)
- 脂肪酸と、脂肪族一級アミンとからなる有機成分を主成分として含有するはんだペースト用フラックス。
- 前記はんだペースト用フラックスの質量に対する前記有機成分の質量割合は、70質量%以上100質量%以下である請求項1に記載のはんだペースト用フラックス。
- 前記脂肪酸と前記脂肪族一級アミンとのモル比が1:0.5以上1.5以下となるように構成される請求項1又は2に記載のはんだペースト用のフラックス。
- 前記脂肪酸は、飽和脂肪酸及び不飽和脂肪酸の少なくとも一方であり、
前記飽和脂肪酸は、主鎖の炭素数が10以下であり、
前記不飽和脂肪酸は、炭素数が18以下である請求項1乃至3の何れか一項に記載のはんだペースト用フラックス。 - 前記不飽和脂肪酸は、オレイン酸、リノール酸、及び、リノレン酸からなる群から選択される少なくとも一つである請求項4に記載のはんだペースト用フラックス。
- 前記脂肪酸は、飽和脂肪酸と不飽和脂肪酸とから構成されると共に、飽和脂肪酸と不飽和脂肪酸との合計のモル数に対する不飽和脂肪酸のモル数の割合が20mol%以下である請求項1乃至5の何れか一項に記載のはんだペースト用フラックス。
- 前記脂肪族一級アミンは、飽和脂肪族一級アミン及び不飽和脂肪族一級アミンの少なくとも一方であり、
前記飽和脂肪族一級アミンは、主鎖の炭素数が8以下であり、
前記不飽和脂肪族一級アミンは、炭素数が18以下である請求項1乃至6の何れか一項に記載のはんだペースト用フラックス。 - 前記不飽和脂肪族一級アミンは、オレイルアミンである請求項7に記載のはんだペースト用フラックス。
- 請求項1乃至8の何れか一項に記載のはんだペースト用フラックスと、はんだ粉とを含有しており、
前記はんだ粉は、Sn又はSn合金からなるSn系金属の粒子、及び、Cu又はCu合金からなるCu系金属の粒子の少なくとも一方を含むはんだペースト。 - 前記はんだペースト用フラックスの含有量が5質量%以上12質量%以下である請求項9に記載のはんだペースト。
- 前記はんだ粉は、平均粒径が5μm以上35μm以下である請求項9又は10に記載のはんだペースト。
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JP2018531947A JP7022434B2 (ja) | 2016-08-02 | 2017-08-02 | はんだペースト用フラックス、及び、はんだペースト |
CN201780045759.3A CN109475983B (zh) | 2016-08-02 | 2017-08-02 | 焊膏用助焊剂和焊膏 |
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CN112469531A (zh) * | 2018-08-10 | 2021-03-09 | 株式会社弘辉 | 助焊剂和焊膏 |
WO2021261356A1 (ja) * | 2020-06-26 | 2021-12-30 | 日本電気硝子株式会社 | 蓋部材の製造方法 |
WO2022065389A1 (ja) * | 2020-09-23 | 2022-03-31 | 株式会社弘輝 | フラックス及びソルダペースト |
US11581239B2 (en) | 2019-01-18 | 2023-02-14 | Indium Corporation | Lead-free solder paste as thermal interface material |
JP7496131B2 (ja) | 2018-08-10 | 2024-06-06 | 株式会社弘輝 | フラックス及びソルダペースト |
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KR102604506B1 (ko) | 2017-06-12 | 2023-11-21 | 오르멧 서키츠 인코퍼레이티드 | 양호한 사용가능 시간 및 열전도성을 갖는 금속성 접착제 조성물, 이의 제조 방법 및 이의 용도 |
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US10800948B2 (en) * | 2018-08-02 | 2020-10-13 | Xerox Corporation | Conductive adhesive compositions and method for the same |
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JP7496131B2 (ja) | 2018-08-10 | 2024-06-06 | 株式会社弘輝 | フラックス及びソルダペースト |
US11581239B2 (en) | 2019-01-18 | 2023-02-14 | Indium Corporation | Lead-free solder paste as thermal interface material |
WO2021261356A1 (ja) * | 2020-06-26 | 2021-12-30 | 日本電気硝子株式会社 | 蓋部材の製造方法 |
JP7473877B2 (ja) | 2020-06-26 | 2024-04-24 | 日本電気硝子株式会社 | 蓋部材の製造方法 |
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TWI824999B (zh) | 2023-12-11 |
US20190182966A1 (en) | 2019-06-13 |
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EP3495090A4 (en) | 2020-01-01 |
US11425825B2 (en) | 2022-08-23 |
TW201817889A (zh) | 2018-05-16 |
EP3495090A1 (en) | 2019-06-12 |
CN109475983A (zh) | 2019-03-15 |
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