Patent ID: 7723768
Filing Date: 2010-05-25
Classification: H01L

Abstract:
1. An asymmetric recessed gate MOSFET, comprising: a first gate comprising a first portion provided in a first recess and a second portion provided over a surface of a semiconductor substrate; a second gate adjacent to the first gate, the second gate comprising a first portion provided in a second recess and a second portion provided over the surface of the semiconductor substrate, wherein the first portion of the first gate is offset in a direction of the second gate, and the first portion of the second gate is offset in a direction of the first gate, a distance between the first portion of the first gate and the first portion of the second gate being smaller than a distance between the second portion of the first gate and the second portion of the second gate; a first impurity region provided between a first side of the first gate and a first side of the second gate in the semiconductor substrate; and a second impurity region provided adjacent to a second side of the first gate and another second impurity region provided adjacent to a second side of the second gate in the semiconductor substrate, the first and second sides being on opposite sides of each of the first and second gates.