Patent ID: 7365386

Claim:
A semiconductor device comprising: a pixel portion formed over a substrate; a pixel thin film transistor in the pixel portion; a storage capacitor in the pixel portion; a leveling film in the pixel portion, formed over the pixel thin film transistor and the storage capacitor; a pixel electrode in the pixel portion, formed on the leveling film; and a column-shape spacer in the pixel portion formed over the leveling film, wherein the pixel thin film transistor includes: a first region of a semiconductor film having a channel forming region, a source region and a drain region; a gate insulating film being in contact with the first region; and a gate electrode being formed on the gate insulating film, wherein the storage capacitor includes: a second region of the semiconductor film; an insulating film being in contact with the second region; and a storage wiring being formed on the insulating film, wherein the insulating film in contact with the second region has a thinner thickness than the gate insulating film in contact with the first region, wherein the column-shape spacer has a top surface and a bottom surface, and wherein an area of the bottom surface is larger than an area of the top surface.