Patent ID: 7154120
Filing Date: 2006-12-26
Classification: H01L

Abstract:
1. A semiconductor device comprising, a pixel with an n-channel type TFT, a light emitting element and a coloring layer, wherein the n-channel type TFT comprises: an active layer which includes a channel forming region, an n-type impurity region (c) being in contact with the channel forming region, an n-type impurity region (b) being in contact with the n-type impurity region (c) and an n-type impurity region (a) being in contact with the n-type impurity region (b); and a gate electrode which includes a first conductive film and a second conductive film having a contour smaller than a contour of the first conductive film, wherein the first conductive film is superposed over the channel forming region and the n-type impurity region (c) while sandwiching a gate insulation film therebetween, and the second conductive film is superposed over the channel forming region while sandwiching the gate insulation film and the first conductive film therebetween.