Patent ID: 8673050
Filing Date: 2014-03-18
Classification: H01B,H01L,H05K

Abstract:
1. A conductive material, comprising: a first metal part whose main ingredient is a first metal; a second metal part formed on the first metal part and whose main ingredient is a second metal, the second metal having a melting point lower than a melting point of the first metal, which second metal forms a metallic compound with the first metal; and a third metal part whose main ingredient is a third metal, which third metal makes a eutectic reaction with the second metal, wherein the eutectic reaction of the second metal and the third metal is made at a temperature equal to or lower than a glass transition temperature of an insulation substrate, the first metal is copper (Cu) or a copper (Cu) alloy, the second metal is tin (Sn) or a tin (Sn) alloy, and the third metal is a powder of bismuth (Bi), indium (In) or an alloy whose main ingredient is bismuth (Bi).