Patent ID: 8217396

Claim:
A display device comprising: a pixel region, and a connection region, the pixel region comprising: a semiconductor layer; a gate insulating layer over the semiconductor layer; a gate electrode layer over the gate insulating layer; a first interlayer insulating layer over the gate electrode layer; a first opening that reaches the semiconductor layer opened in the gate insulating layer and the first interlayer insulating layer; a source or drain electrode layer in the first opening, wherein the source or drain electrode layer covers a portion of the gate electrode layer with the first interlayer insulating layer therebetween; a second interlayer insulating layer over the source or drain electrode layer, and over the first interlayer insulating layer, wherein the second interlayer insulating layer has a second opening that reaches the source or drain electrode layer, and wherein the second opening is provided over the source or drain electrode layer which covers a portion of the gate electrode layer with the first interlayer insulating layer therebetween; and a first electrode layer in the second opening; the connection region comprising: a conductive layer provided under the first interlayer insulating layer; a wiring provided over the first interlayer insulating layer, wherein the wiring overlaps the conductive layer in the connection region; the second interlayer insulating layer provided with a third opening which reaches the wiring, wherein an upper edge portion of the third opening is covered with an insulating layer which is formed over the second interlayer insulating layer; and a second electrode layer in the third opening to be in direct contact with the wiring, wherein the second electrode layer extends to the pixel region.