Patent ID: 7057294
Filing Date: 2006-06-06
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor chip in which circuit elements are formed and on the periphery of which an electrode pad having a bump consisting essentially of Au thereon for connection with outside is formed; an insulating substrate on one surface of which a wiring is formed, said wiring having an Au layer on a surface of a connecting section with said bump, and on the other surface of which a ball like external connecting terminal is formed being connected to said wiring, said ball like external connecting terminal being directly connected to a wiring board; and a Sn coat provided on a surface of said bump or a surface of said Au layer of said wiring, wherein said bump and said connecting section of said wiring are bonded with each other through an Au—Sn alloy layer which is made of said Sn coat and the Au of said bump or said wiring and said wiring comprises a first layer made of a Cu film and a second layer made of Au formed by electroplating on said first layer with said first layer disposed between said second layer and said insulating substrate.