Patent ID: 6607952
Filing Date: 2003-08-19
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device, comprising the steps of:forming a disposable gate on a semiconductor substrate in a region where a gate electrode is to be formed; forming a sidewall spacer on a sidewall of the disposable gate; forming a source and drain in the semiconductor substrate using the disposable gate and the sidewall spacer as a mask; forming an interlevel insulating film on the semiconductor substrate so as to cover the disposable gate; planarizing an upper surface of said interlevel insulating film to expose upper surfaces of the disposable gate and the sidewall spacer; removing the disposable gate to form a trench portion having a side surface formed from the sidewall spacer and a bottom surface formed from the semiconductor substrate; depositing a gate insulating film on the semiconductor substrate so as to cover the bottom surface and side surface of the trench portion; forming a gate electrode buried in the trench portion; and removing the sidewall spacer and said gate insulating film on the sidewall of said gate electrode.