Multilayer metal leadframe and method for making same.

摘要

Prodn. of a lead frame, having a conducting pattern, involves (a) providing a multilayer clad strip having a Cu alloy base layer, an Al or Al alloy conducting layer and a Cu or Cu alloy upper layer; (b) plating the upper layer with a Sn or Sn-Pb alloy layer; (c) selectively cutting away portions of the plated layer and upper layer with a skiving tool to expose a selected pattern of the conducting layer; and (d) removing part of the thickness of the conducting layer.