Patent ID: 7101807
Filing Date: 2006-09-05
Classification: H01L

Abstract:
1. A method of fabricating a semiconductor device, comprising: forming a conductive film comprising a single layer or a plurality of layers over a semiconductor film; forming a first mask layer over said conductive film; forming a second mask over said first mask layer; patterning said first mask layer into a first mask pattern whose edge is located inside of said second mask, by etching using said second mask; etching said conductive film using said second mask to form a conductive film in a first shape; etching said conductive film in said first shape using said first mask pattern to form a gate electrode having an exposed portion thinner than a portion covered by said first mask pattern; and forming a channel formation region, first impurity regions sandwiching said channel formation region, and a second impurity region whose impurity concentration is lower than said first impurity regions, which has been provided between said channel formation region and one of said first impurity regions, wherein said exposed portion of said gate electrode overlaps with said second impurity region.