Patent ID: 6285083
Filing Date: 2001-09-04
Classification: H01L,H05K,Y02P

Abstract:
A mounting structure for mounting a semiconductor device having an electrode on a mounting substrate having a conductive pad, said structure comprising:a metallic bump electrically connecting said electrode of the semiconductor device to said conductive pad;a first eutectic solder for soldering between said metallic bump and said electrode of the semiconductor device;a second eutectic solder for soldering between said metallic bump and said conductive pad of the substrate;wherein a melting point of said metallic bump is higher than those of said first and second eutectic solders, a resistance to fatigue of said first eutectic solder is higher than that of said second eutectic solder, and said first eutectic solder is composed mainly of a Sn component and a Pb component, and also composed of at least two of an In component, a Sb component, an Ag component, and a Cu component.