Patent ID: 7291534
Filing Date: 2007-11-06
Classification: H01L,Y10S

Abstract:
1. A method of manufacturing a semiconductor device, comprising: (a) preparing a semiconductor substrate having a structure in which first and second active regions are isolated by an element isolating insulation film; (b) forming a first insulation film on the semiconductor substrate, the first insulation film covering the first and second active regions and the element isolating insulation film; (c) forming a first film on the first insulation film; (d) exposing the first active region by etching the first insulation film and the first film over the first active region; (e) forming a second insulation film which is thicker than the first insulation film on the exposed first active region; (f) forming a first conductive film on the second insulation film; (g) forming a first gate electrode and a first gate insulation film over the first active region by processing the first conductive film and the second insulation film; (h) exposing the second active region by etching the first insulation film and the first film over the second active region; (i) forming a third insulation film which is thinner than the second insulation film on the exposed second active region; (j) forming a second conductive film on the third insulation film; and (k) forming a second gate electrode and a second gate insulation film over the second active region by processing the second conductive film and the third insulation film.