Patent ID: 9209527
Filing Date: 2015-12-08
Classification: B23K,C22C,H01R,H05K,Y10T

Abstract:
1. A joining method for joining a first metal member having at least a surface of a first metal to a second metal member having at least a surface of a second metal with a joining material predominantly of a joining metal having a lower melting point than at least one of the first metal and the second metal sandwiched between the first metal member and the second metal member, wherein the joining metal composing the joining material is Sn or an alloy containing Sn in an amount of 70% by weight or more, and at least one of the first metal and the second metal is a metal or an alloy which forms an intermetallic compound with the joining metal, and which has a lattice constant difference of 50% or more from the intermetallic compound produced on the surface of at least one of the first metal and the second metal, the joining method comprising: heat-treating the joining material located between the first metal member and the second metal member at a temperature at which the joining metal is melted to join the first metal member to the second metal member with the joining material sandwiched therebetween.