Patent ID: 8975692
Filing Date: 2015-03-10
Classification: H01L

Abstract:
1. A semiconductor device comprising: gap fill insulation patterns filling trenches in an epitaxial substrate; a semiconductor layer interposed between the gap fill insulation patterns and the trenches; a semiconductor pillar defined between the gap fill insulation patterns and doped with a dopant of a first conductive type; a gate electrode disposed in a recess region in the semiconductor pillar; a doping region disposed below the trenches and doped with a dopant of a second conductive type; and a body region disposed in the semiconductor pillar and surrounding a sidewall of the recess region, wherein the body region is doped with the second conductive type dopant; the semiconductor layer is not doped with the second conductive type dopant; and a width of an upper region of the trenches is broader than of a lower region of the trenches.