Patent ID: 6680510
Filing Date: 2004-01-20
Classification: H01L

Abstract:
A nonvolatile semiconductor memory device having a cell transistor and a non-cell transistor which is a transistor other than said cell transistor, said cell transistor and said non-cell transistor being covered with an interlayer insulator film, wherein said non-cell transistor comprises:a first insulator film formed on a semiconductor substrate; a first gate electrode formed on said first insulator film; a second insulator film formed on said first gate electrode in a first area of said first gate electrode, said first area being a part of said first gate electrode; a second gate electrode formed on said second insulator film; and a contact portion embedded in a contact hole of said interlayer insulator film to contact said first gate electrode in a second area of said first gate electrode, wherein said second insulator film is not formed on said second area and said contact portion is out of contact with said second insulator film.