High voltage semiconductor device including a free wheel diode

    公开(公告)号:US08164111B2

    公开(公告)日:2012-04-24

    申请号:US12899758

    申请日:2010-10-07

    IPC分类号: H01L29/739

    摘要: A high voltage semiconductor device includes a semiconductor substrate, a p type base region in a first main surface, an n+ type emitter region in the p type base region, an n+ type cathode region adjacent to an end surface of the semiconductor substrate and not penetrating the semiconductor substrate, a p+ type collector region in a second main surface, a first main electrode, a second main electrode, a third main electrode, and a connection portion connecting the second main electrode and the third main electrode. A resistance between the p type base region and the n+ type cathode region is greater than a resistance between the p type base region and the p+ type collector region. In the high voltage semiconductor device in which an IGBT and a free wheel diode are formed in a single semiconductor substrate, occurrence of a snap-back phenomenon is suppressed.