Patent ID: 6753222
Filing Date: 2004-06-22
Classification: H01L

Abstract:
A method for forming a semiconductor device comprising:a first step of forming a non-volatile semiconductor memory in a first region of a substrate of the semiconductor device, the non-volatile semiconductor memory comprising a first gate that comprises a tunnel insulating film, a floating gate electrode, a capacitor insulating film, and a control gate electrode; and a second step of forming a semiconductor device in a second region of the substrate, the semiconductor device comprising a second gate that comprises a gate insulating film and a gate electrode, wherein, during patterning of the second gate, a surface of the first gate is covered with a protective film that is hardly etched by an etchant used for the patterning of the second gate, and an etching resistance of the protective film is higher than that of a resist pattern used as a mask for patterning of the second gate.