Patent ID: 7935592
Filing Date: 2011-05-03
Classification: H01L

Abstract:
1. A method of manufacturing a semiconductor device, comprising: forming a silicon nitride film, capable of functioning as a spacer to each of lateral side walls of a plurality of gate electrodes formed respectively in a plurality of transistor forming regions; oxidizing a surface of the silicon nitride film by oxygen plasma processing to form an oxide protective surface to on the silicon nitride film so that the silicon nitride film is intervened between the gate electrode and the oxide protective surface; covering a portion of the plurality of transistor-forming regions with a resist film; introducing impurities into an other portion of said transistor-forming regions to form a plurality of extension regions in the other portion by using the silicon nitride film with the oxide protective surface and the gate electrode, as a mask; removing the resist film; and forming a side wall on the lateral side wall of the silicon nitride film formed with the oxide protective surface.