Patent ID: 9171951
Filing Date: 2015-10-27
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a drain region of a first conductivity type; a source region of the first conductivity type; a channel region of a second conductivity type provided between the drain region and the source region; a first gate insulator film provided on the channel region; a second gate insulator film provided on the channel region to be adjacent to the first gate insulator film on a source region side of the first gate insulator film, an electrical thickness of the second gate insulator film being less than an electrical thickness of the first gate insulator film; a first gate electrode provided on the first gate insulator film, a portion of the first gate electrode being provided on the second gate insulator film; and a second gate electrode provided on the second gate insulator film, a work function of the second gate electrode being higher than a work function of the first gate electrode.