Patent ID: 6639265
Filing Date: 2003-10-28
Classification: G02F,H01L

Abstract:
A semiconductor device comprising:a pixel thin film transistor in a pixel portion; a storage capacitor in the pixel portion; the pixel thin film transistor including: 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; a gate electrode being formed on the gate insulating film; the storage capacitor including: a second region of the semiconductor film; an insulating film being in contact with the second region; a storage wiring being formed on the insulating film, wherein the gate electrode has a tapered portion, wherein the second region includes an impurity to impart an n-type conductivity or a p-type conductivity, 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.