Patent ID: 6638643
Filing Date: 2003-10-28
Classification: B32B,C22C,H01R,Y10T

Abstract:
An electrically conductive metal tape for electrical contact components, comprising: a base material made of a copper alloy having a metal coating made of tin-silver alloy, and an intermetallic phase between the base material and the coating; wherein the base material includes, expressed in percentage by weight:nickel (Ni)â€ƒ1.0% to 4.0%silicon (Si)0.08% to 1.0%tin (Sn)0.02% to 1.0%zinc (Zn)0.01% to 2.0%zirconium (Zr)0.005% to 0.2%â€‚â€‰silver (Ag)0.02% to 0.5%the remainder being copper; wherein the tin-silver alloy of the coating has a silver proportion between 1% by weight and 3.8% by weight; and wherein a conversion of an &eegr;-phase (Cu6Sn5) into a &egr;-phase (Cu3Sn) is hindered within the intermetallic phase.