Patent ID: 7061069
Filing Date: 2006-06-13
Classification: H01L

Abstract:
1. A semiconductor device comprising: a semiconductor substrate including plural trenches on a surface; first and second insulators placed in the trenches, respectively, and top faces of the first and second insulators are higher than the surface of the substrate, the second insulator is larger in width than the first insulator, and the top face of the second insulator is higher than that of the first insulator; a third insulation film disposed on the surface of the substrate; a first conductor disposed on a surface of the third insulation film; a second conductor disposed on a surface of the first conductor, an interval between a first side face and a second side face of the second conductor is upwardly smaller; a fourth insulation film contacting with the top face of the second conductor, the fourth insulation film positioned upward of the first insulation film is formed over the lowest face of the second conductor; and a third conductor disposed on the fourth insulation film.