摘要:
A heat dissipation substrate having the maximum value of the coefficient of linear expansion of 10 ppm/K or less in any direction in a plane parallel to the surface within a temperature range from room temperature to 800°C as well as a thermal conductivity of 250 W/m•K or higher at 200°C is produced by densifying an alloy composite of CuMo or CuW composed of Cu and coarse powder of Mo or W and subsequently cross-rolling the same alloy composite.
摘要:
A bonding member includes a layered body (10) formed by layering a plurality of foils (11) made of a material selected from Au, Ag, Cu, Al, Ni, Sn, Zn, Mg, Pb, and an alloy of two or more of these metals, which are metals having high heat conductivity, the layered body having a void (12) of 5 vol% or more and 30 vol% or less inside, in which thermal conductivity after a power cycle test in which heating to 200 °C and cooling to 25 °C are repeated 300 times is 30 W/m·K or more.
摘要:
A heat dissipation substrate having a metallic layer with few defects on its surface is obtained by a process including the steps of: forming a metallic layer by plating on the surface of an alloy composite mainly composed of a powder of a principal metal, additional metal and diamond; and heating and pressurizing the alloy composite coated with the metallic layer, at a temperature equal to or lower than the melting points of the metallic layer and the alloy composite. Consequently a heat dissipation substrate is obtained which has a coefficient of linear expansion of 6.5 ppm/K or higher and 15 ppm/K or lower as well as a degree of thermal conductivity of 420 W/m·K or higher, the substrate having a metallic layer with few defects in its surface layer and thereby allowing for a Ni-based plating on which the void percentage in the solder joint will be 5 % or lower.
摘要:
A heat dissipation substrate having the maximum value of the coefficient of linear expansion of 10 ppm/K or less in any direction in a plane parallel to the surface within a temperature range from room temperature to 800°C as well as a thermal conductivity of 250 W/m€¢K or higher at 200°C is produced by densifying an alloy composite of CuMo or CuW composed of Cu and coarse powder of Mo or W and subsequently cross-rolling the same alloy composite.
摘要:
A heat dissipation substrate having a metallic layer with few defects on its surface is obtained by a process including the steps of: forming a metallic layer by plating on the surface of an alloy composite mainly composed of a powder of a principal metal, additional metal and diamond; and heating and pressurizing the alloy composite coated with the metallic layer, at a temperature equal to or lower than the melting points of the metallic layer and the alloy composite. Consequently a heat dissipation substrate is obtained which has a coefficient of linear expansion of 6.5 ppm/K or higher and 15 ppm/K or lower as well as a degree of thermal conductivity of 420 W/m·K or higher, the substrate having a metallic layer with few defects in its surface layer and thereby allowing for a Ni-based plating on which the void percentage in the solder joint will be 5 % or lower.