Patent ID: 8786016
Filing Date: 2014-07-22
Classification: H01L

Abstract:
1. A semiconductor device, comprising: a semiconductor substrate; a first conductive type well in the semiconductor substrate; a second conductive type drift region in the semiconductor substrate, the drift region including a first drift doping region and a second drift doping region, wherein the second drift doping region vertically overlaps the well; and a first conductive type body region in the well, the body region being in contact with a side of the first drift doping region, wherein the first drift doping region includes a first conductive type dopant and a second conductive type dopant, and the second drift doping region includes the first conductive type dopant and the second conductive type dopant, wherein an average density of the first conductive type dopant in the first drift doping region is less than an average density of the first conductive type dopant in the second drift doping region.