Patent ID: 7800167
Filing Date: 2010-09-21
Classification: H01L,H01M,Y02E

Abstract:
1. A semiconductor device, comprising: a semiconductor member having a trench that extends to a common drain region at a bottom of the trench, the trench having first and second sidewalls, the member having first and second base regions of a first conductivity type adjacent the bottom of the trench and disposed at the first and second sidewalls of the trench respectively, the member additionally having first and second source regions of a second conductivity type, the first and second source regions being disposed at the first and second sidewalls of the trench respectively and on the first and second base regions respectively, the first and second source regions having first and second contact regions respectively; a first gate insulating film portion on the first sidewall of the trench; a first gate electrode on the first gate insulating film portion; a first source electrode connected to the first contact region; a second gate insulating film portion on the second sidewall of the trench; a second gate electrode on the second gate insulating film portion; and a second source electrode connected to the second contact region, wherein a first transistor that is controlled by the first gate electrode has a breakdown voltage that is different from a breakdown voltage of a second transistor that is controlled by the second gate electrode, and wherein the trench follows a closed path that has first and second straight portions with ends, and first and second curved portions that join the ends of the first and second straight portions.