Patent ID: 8551873
Filing Date: 2013-10-08
Classification: H01L

Abstract:
1. A method for manufacturing a semiconductor device including a MOS transistor, the method comprising: forming a gate electrode material layer on a first insulating film formed on a semiconductor substrate; forming an etching mask on the gate electrode material layer; forming a gate electrode by patterning the gate electrode material layer such that a protective film that protects at least a lower portion of a side face of the gate electrode and a portion of the first insulating film, which is adjacent to the side face, is formed while the gate electrode material layer is patterned; forming a second insulating film on the semiconductor substrate on which the gate electrode is formed, such that the second insulating film covers the protective film and the etching mask on the gate electrode; and forming an interlayer insulation film on the second insulating film covering the protective film and the etching mask on the gate electrode.