Patent ID: 11031365

Abstract:
A semiconductor device including a mounting substrate, a semiconductor chip, a rear-surface metal layer, an AuSn solder layer, and a solder blocking metal layer, is disclosed. The semiconductor chip is mounted on the mounting substrate, and includes front and rear surfaces, and a heat generating element. The rear-surface metal layer includes gold (Au). The AuSn solder layer is located between the mounting substrate and the rear surface to fix the semiconductor chip to the mounting substrate. The solder blocking metal layer is located between the rear surface and the mounting substrate, and in a non-heating region excluding a heating region in which the heat generating element is formed. The solder blocking metal layer includes at least one of NiCr, Ni and Ti and extends to an edge of the semiconductor chip. A void is provided between the solder blocking metal layer and the AuSn solder layer.