Patent ID: 7569875
Filing Date: 2009-08-04
Classification: H01L

Abstract:
1. A semiconductor device having a substrate; an emitter electrode or source electrode formed on a top surface side of said substrate; a trench gate electrode formed in a trench formed from said top surface side of said substrate; and a collector electrode or drain electrode fanned an a bottom surface side of said substrate, said device comprising: an insulating region formed so as to surround a device-forming region provided on a device-forming surface of said substrate; a first layer formed vertically to said top surface on a side of said trench gate electrode; a second layer having a conduction type opposite to a conduction type of said first layer, being parallel to said first layer; and a third layer being in contact with said insulating region, and having the same conduction type as that of said first layer and a channel formed through application of an electric potential to said trench gate electrode.