Patent ID: 7598586
Filing Date: 2009-10-06
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate of a first conductivity; and a semiconductor layer disposed on the semiconductor substrate, the semiconductor layer including a trench penetrating through the semiconductor layer, RESURF layers of a second conductivity different from the first conductivity, each RESURF layer being disposed adjacent to an interior side wall of the trench, and drift layers of the first conductivity, each having an isolation portion disposed between each of the RESURF layers and the semiconductor substrate to prevent the RESURF layer from contacting the semiconductor substrate, wherein the drift layers and the RESURF layers are disposed adjacent to each other in a direction parallel to the semiconductor substrate, each RESURF layer is in contact with at least one of the drift layers, and each of the drift layers is in contact with at least one of the RESURF layers.