Patent ID: 7977189

Claim:
A method of manufacturing a semiconductor device, comprising: forming a groove on a semiconductor substrate, the groove formed therein to extend in a first direction, wherein forming the groove comprises: forming a silicon oxide film in a surface of the semiconductor substrate; forming an insulating film having an opening on the semiconductor substrate with a sidewall formed around the opening; forming source/drain diffusion regions between which the groove is located, the source/drain diffusion regions formed therein to extend in the first direction, wherein forming the source/drain diffusion regions comprises implanting ions in the semiconductor substrate, with a mask being formed with the silicon oxide film and the sidewall; forming an ONO film on the semiconductor substrate over the groove and the source/drain regions; and forming a control gate on the ONO film, the control gate formed therein to extend in a second direction perpendicular to the first direction, the control gate provided over portions of the groove and the source/drain regions.