Patent ID: 6042933
Filing Date: 2000-03-28
Classification: B22F,H01B,H01L,H05K,Y10S,Y10T

Abstract:
An electric circuit device comprising an insulating substrate; circuit conductors formed on the insulating substrate using an electroconductive paste comprising electroconductive composite non-noble metal powder particles of a non-noble metal, which have a flat shape, the particles each having a surface area and a weight, 50% or more of surface area of said particles being covered with a noble metal in an amount of 2 to 30% by weight based on the weight of the non-noble metal powder particles, thereby providing a noble metal covering layer, and with a layer of a mixture of the non-noble metal and noble metal being interposed between the non-noble metal powder particles and the noble metal covering layer, and a binder, and electronic parts mounted on the circuit conductors.