Patent ID: 6486411
Filing Date: 2002-11-26
Classification: H01L,H05K,Y02P,Y10T

Abstract:
A semiconductor module comprising:a semiconductor device provided with solder bumps; a substrate provided on a face thereof with external terminals each having a solder portion, on which substrate the semiconductor device is mounted; and connection portions through which said semiconductor device is bonded to said substrate, each of said connection portions including respective ones of the solder bumps and solder portions which are bonded to each other; said solder bumps being made of a first Pb-free solder containing silver; said solder portions of said external terminals being made of a second Pb-free solder containing silver which second solder has a composition different from that of the first Pb-free solder; said solder portions of said external terminals having a melting point lower than that of the solder bumps of the semiconductor device; and a content of silver contained in said solder bumps being lower than that of silver contained in said solder portions of said external terminals of the substrate.