Patent ID: 6900084

Claim:
A method of manufacturing a semiconductor device comprising a thin film transistor and a convex portion comprising: a first step of patterning a first conducting film on an insulating surface using a first mask and forming a gate electrode of said thin film transistor and a first conducting layer; a second step of forming a lamination of an insulating film, a semiconductor film, and an n-type semiconductor film on said first conducting layer; a third step of forming a second conducting film on said n-type semiconductor film; a fourth step of patterning said semiconductor film overlapping said first conducting layer; said n-type semiconductor film overlapping said semiconductor film; and said second conducting film overlapping said n-type semiconductor film using a second mask to form said convex portion composed of a lamination structure of a first conducting layer, a semiconductor layer, an n-type semiconductor layer, and a second conducting layer; and a fifth step of forming a third conducting film and patterning said third conducting film using a third mask to form a pixel electrode covering said convex portion characterized in that said pixel electrode overlaps said convex portion and has unevenness in its surface, wherein a channel region of said thin film transistor comprises a portion of said semiconductor film.