Patent ID: 6919248

Claim:
A process for manufacturing a semiconductor device comprising: forming trenches through a channel region of one conductivity type in a semiconductor body having a first major surface and a second major surface, said trenches having opposing sidewalls, each sidewall meeting said first major surface to form an edge; forming a first conductive region of another conductivity in a first sidewall of at least one of said trenches by directing dopants of another conductivity toward said first sidewall of at least one of said trenches in a direction not parallel to said sidewall and at a sufficient energy to implant the same into only a portion of said first sidewall to a first lateral depth inside said channel region; and forming a second conductive region of said another conductivity oriented transverse to said first conductive region and said sidewall, said second conductive region terminating at said first major surface and extending laterally further than said first depth to a second depth within said channel region, whereby a portion of said second conductive region is disposed over said first conductive region, and another portion of said second conductive region is disposed over a region of said channel region, wherein said first conductive region and said second conductive region are formed in separate steps, whereby vertical and lateral dimensions of said first conductive region and said second conductive region can be independently controlled.