Patent ID: 8796760

Claim:
A manufacture, comprising: a doped layer having a first type doping, the doped layer defining a trench therein, and the trench having a bottom surface; a body structure over the doped layer, the body structure having an upper surface and comprising a body region, and the body region having a second type doping different from the first type doping; an insulator partially filling the trench; a first conductive feature buried in, and separated from the doped layer and the body structure by, the insulator, the first conductive feature extending from a position substantially leveled with the upper surface of the body structure toward the bottom surface of the trench, the first conductive feature overlapping the doped layer for an overlapping distance; and a second conductive feature buried in, and separated from the first conductive feature and the bottom surface of the trench by, the insulator, the second conductive feature having an extended portion not overlapping the first conductive feature, and the extended portion extending toward the bottom surface of the trench.