Patent ID: 6773996
Filing Date: 2004-08-10
Classification: H01L

Abstract:
A method for manufacturing a semiconductor device, comprising:a first step of forming a semiconductor layer; a second step of forming a gate insulating film over the semiconductor layer; a third step of forming a first conducting film over the gate insulating film; a fourth step of forming a second conducting film over the first conducting film; a fifth step of forming a gate electrode of a first shape by carrying out dry etching at least once on the second conducting film and the first conducting film; a sixth step of forming a first impurity region in the semiconductor layer; a seventh step of forming a gate electrode of a second shape by carrying out dry etching on the gate electrode of the first shape; an eighth step of forming a gate electrode of a third shape by carrying out dry etching selectively on the second conducting film of the gate electrode of the second shape; and a ninth step of forming a second impurity region in the semiconductor layer.