Abstract:
A joint structure that includes a first metal member, a second metal member, and a joint portion sandwiched between the first metal member and the second metal member. At least a Cu-M-Sn intermetallic compound is dispersed in the joint portion, M is at least one of Ni and Mn, and neither a Cu3Sn layer nor a Cu6Sn5 layer is present on at least one of interfaces between the joint portion and the first metal member and the second metal member.
Abstract translation:一种接头结构,包括第一金属构件,第二金属构件和夹在第一金属构件和第二金属构件之间的接合部。 至少一种Cu-M-Sn金属间化合物分散在接头部分中,M是Ni和Mn中的至少一种,并且Cu 3 Sn层和Cu 6 Sn 5层不存在于接合部和 第一金属构件和第二金属构件。
Abstract:
There are provided are an adhesive composition that keeps storage stability and further gives a cured product wherein metallic bonds are formed in the state that the cured product wets its components and is satisfactorily spread between the components (or parts), thereby turning excellent in adhesive property, electroconductivity, and reliability for mounting such as TCT resistance or high-temperature standing resistance; an electronic-component-mounted substrate using the same; and a semiconductor device. The adhesive composition comprises electroconductive particles (A) and a binder component (B), wherein the electroconductive particles (A) include a metal (a1) having a melting point equal to or higher than the reflow temperature and containing no lead, and a metal (a2) having a melting point lower than the reflow temperature and containing no lead, and the binder component (B) includes a thermosetting resin composition (b1) and an aliphatic dihydroxycarboxylic acid (b2).
Abstract:
A base substrate includes a ceramic sintered substrate having through holes, first and second metal wirings which are integrally disposed so as to be connected to the surface of the ceramic sintered substrate and the inside of the through holes, and first and second active metal layers which are disposed between the ceramic sintered substrate and the first and second metal wirings.
Abstract:
A solder paste using a Sn—Ag base, Sn—Cu base, or similar alloy powder has a high melting point, so it causes thermal damage to electronic devices. Sn—Ag—In base lead-free solder alloys having a low melting temperature have been studied, but they are difficult to use because they cause much occurrence of chips standing up during reflow.The present invention forms a solder paste by separating a Sn—Ag—In base lead-free solder into first and second solder alloy powders for which the difference in their peak temperatures measured by differential thermal analysis is at least 10° C. and blends the mixed powders with a flux.
Abstract:
To provide a conductive pattern formation method capable of improving conductivity of a conductive pattern and a composition for forming a conductive pattern by means of photo irradiation or microwave heating. A composition for forming a conductive pattern that contains copper particles each having a copper oxide thin film formed on the entire or a part of a surface thereof, plate-like silver particles each being 10 to 200 nm thickness, and a binder resin is prepared. The composition for forming a conductive pattern is printed in a pattern having a desired shape on a substrate. Photo irradiation or microwave heating is applied to the printed pattern to thereby produce a copper/silver sintered body, to form a conductive film.
Abstract:
A multi-layer micro-wire structure includes a substrate having a surface. A plurality of micro-channels is formed in the substrate. A first material composition is located in a first layer only in each micro-channel and not on the substrate surface. A second material composition different from the first material composition is located in a second layer different from the first layer only in each micro-channel and not on the substrate surface. The first material composition in the first layer and the second material composition in the second layer form an electrically conductive multi-layer micro-wire in each micro-channel.
Abstract:
A conductive paste comprising 88-94% by mass of Ag powder having an average particle size of 3 μm or less and 0.1-3% by mass of Pd powder, the total amount of the Ag powder and the Pd powder being 88.1-95% by mass. A multilayer ceramic substrate obtained by laminating and sintering pluralities of ceramic green sheets, and having conductor patterns and via-conductors inside, the via-conductors being formed in via-holes having diameters of 150 μm or less after sintering, containing Ag crystal particles having a particle size of 25 μm or more, and having a porosity of 10% or less.
Abstract:
Disclosed is a multilayer wiring board having via-hole conductors, the via-hole conductor including a metal portion and a resin portion. The metal portion includes a first metal region which includes a link of copper particles forming a path electrically connecting a first wiring and a second wiring; a second metal region mainly composed of a metal selected from the group consisting of tin, a tin-copper alloy, and a tin-copper intermetallic compound; a third metal region mainly composed of bismuth; and a fourth metal region composed of tin-bismuth solder particles. The link has plane-to-plane contact portions where the copper particles are in plane-to-plane contact with one another. At least a part of the second metal region is in contact with the first metal region. The tin-bismuth solder particles, each surrounded by the resin portion, are interspersed in the via-hole conductor.
Abstract:
A multilayer wiring board having via-hole conductors which electrically connects a plurality of wirings arranged in a manner such that an insulating resin layer is placed between the wirings, wherein: the via-hole conductors each include copper, tin, and bismuth, namely, a first metal region including a link of copper particles in plane-to-plane contact with one another, the link electrically connecting the wirings, a second metal region mainly composed of one or more of tin, a tin-copper alloy, and a tin-copper intermetallic compound, and a third metal region mainly composed of bismuth; at least a part of the second metal region is in contact with the surface of the copper particles, the surface excluding the area of the plane-to-plane contact portion of the link; and the Cu, Sn, and Bi in the metal portion are of a composition having a specific weight ratio (Cu:Sn:Bi).
Abstract:
The present invention provides electrically and thermally conductive compositions for forming interconnections between electronic elements. Invention compositions comprise three or more metal or metal alloy particle types and an organic vehicle comprising a flux that is application specific. The first particle type includes a reactive high melting point metal that reacts with a reactive low melting point metal(s) in the other particles to form intermetallic species. The reactive low melting point metal(s) of the invention are provided in two distinct particle forms. The first reactive low melting point metal particle includes a carrier that facilitates the reaction with the reactive high melting point metal. The second reactive low melting point metal particle acts primarily as a source of the reactive low melting point metal. Combination of the three particle types provides several advantages including reduction of the undesirable characteristics of the carrier metal while preserving and, in some embodiments, enhancing, the advantageous facilitation of the metallic reaction.