Patent ID: 7767500

Claim:
A method for forming a superjunction device on a substrate having a first conductivity type, the method comprising: forming a first layer of semiconductor material over the substrate, the first layer of semiconductor material being of the first conductivity type; forming a first region of a second conductivity type in said first layer; forming a second layer of semiconductor material over said first layer, the second layer of semiconductor material being of the first conductivity type; forming a second region of said second conductivity type in said second layer, wherein said second region is larger in volume than said first region, wherein said first region and said second region are vertically aligned to form a pylon; and forming a MOSgated structure disposed on top of said second region, wherein said MOSgated structure comprises a channel region being of said second conductivity type and a plurality of source regions of an opposite conductive type than said second conductivity type, wherein said channel region is separate from said first region, said second region, said first layer and said second layer.