Patent ID: 7282753

Claim:
A vertical current conducting device comprising: a substrate having at least one conductivity type, a thickness of from about 100 μm to 700 μm, a first side, a second side opposite to said first side and at least one trench having a thickness ranging from about at least 10 μm to 400 μm in at least one region on said second side; an active device located on said first side in a region located at least partially above one of said at least on trench; and a current electrode disposed on said second side and in electrical contact with one of said at least one trench, said current electrode being operable to provide a vertical current through said substrate to said active device, wherein said substrate has more than one conductivity type layer or more than one conductivity type layer concentration so that either (a) a depth amount of a first conductivity type layer of said substrate or a depth amount of a first conductivity type layer concentration of said substrate remains or (b) no depth amount of said first conductivity type layer of said substrate or no depth amount of said first conductivity type layer concentration of said substrate remains.