Patent ID: 6657229
Filing Date: 2003-12-02
Classification: H01L

Abstract:
A semiconductor device, comprising:first and second transistors; and a common gate between the first and second transistors, wherein said first transistor includes the common gate separated, in a first direction, from a semiconductor substrate by a first gate insulating film adjacent to a lower surface of the common gate, and first source and drain regions formed, respectively, in surface regions of said semiconductor substrate on opposing sides of said common gate with respect to a second direction perpendicular to the first direction, wherein said second transistor includes the common gate separated, in the first direction, from a conductive film by a second gate insulating film adjacent to an upper surface of the common gate, and second source and drain regions formed, respectively, in surface regions of said conductive film on opposing sides of said common gate with respect to the second direction; an insulating interlayer arranged to cover side surfaces of said common gate and said second gate insulating film, said insulating interlayer being planarized such that an upper surface of said insulating interlayer and said upper surface of said second gate insulating film are on substantially a same plane along the second direction, said conductive film being formed on said insulating interlayer including the upper surface of said second gate insulating film; and an insulating film over the surface regions of said conductive film, said insulating film having a contact hole extending therethrough to a surface of a drain region of at least one of the first and second transistors.