Patent ID: 6974750
Filing Date: 2005-12-13
Classification: H01L

Abstract:
1. A process for fabricating a semiconductor device, comprising: providing a semiconductor substrate of a first conductivity; epitaxially growing an undoped intrinsic semiconductor body over a major surface of said semiconductor substrate; implanting dopants of a second conductivity into said intrinsic semiconductor body to a first depth; implanting dopants of said first conductivity into said intrinsic semiconductor body to a second depth, said second depth being farther from a free surface of said semiconductor body than said first depth and closer to said substrate than said first depth; and applying heat to said semiconductor body to at least activate said dopants of said first conductivity and said dopants of said second conductivity and to diffuse said dopants until said dopants of said first conductivity and said dopants of said second conductivity meet inside said semiconductor body; whereby a channel region is formed over a drift region in said semiconductor body.