ELECTRICAL SURGE PROTECTIVE APPARATUS

摘要

Disclosed is an electrical surge protective apparatus comprising: a base region containing impurities of a first conductivity type; a first semiconductor region containing impurities of a second conductivity type; a second semiconductor region containing impurities of the same conductivity type as that of the second conductivity type; and a high resistance region having a lower impurity concentration than the second semiconductor region. The first semiconductor region is joined to the base region on its upper surface side. The second semiconductor region is joined to the base region on its lower surface side. The high resistance region is electrically connected to both the base region and the second semiconductor region.