Patent ID: 6734556
Filing Date: 2004-05-11
Classification: H01L

Abstract:
A semiconductor device comprising:a first semiconductor chip having an electrode terminal; a second semiconductor chip having an electrode terminal; a bump made of a first metal for joining said first and second semiconductor chips, said bump being provided on at least one of said electrode terminal of said first semiconductor chip and said electrode terminal of said second semiconductor chip; and an alloy layer or a third metal layer formed on said bump where said first and second semiconductor chips are joined with each other via said bump, said alloy layer being made of an alloy of said first metal and a second metal, wherein said second metal or said third metal layer is made of such a metal that can melt at a temperature lower than a melting point of said first metal, wherein a second metal layer made of said second metal or said third metal layer is provided on a right surface and a side surface of said bump electrode made of said first metal, so that said first and second semiconductor chips are joined to each other via said alloy layer or via said third metal layer.