Patent ID: 6919599
Filing Date: 2005-07-19
Classification: H01L

Abstract:
1. A MOSgated semiconductor device comprising: a trench receiving region of a first conductivity type having a top first surface; a common channel region of a second conductivity type formed in said trench receiving region and extending to a first depth below said top first surface; a plurality of spaced trenches formed in said trench receiving region through said common channel region; a first region of a first conductivity type formed at the bottom of each trench, each said first region of said first conductivity type being adjacent to said trench receiving region and of a higher conductivity than said trench receiving region; a plurality of conductive regions of said first conductivity type each disposed adjacent a trench; a contact layer formed over said channel receiving region and in ohmic contact with said plurality of conductive regions; and field relief regions of said second conductivity type formed in said trench receiving region below said first depth, wherein said field relief regions are spaced from said channel region.