Liquid crystal display device and method for manufacturing the same
AssigneeSemiconductor Energy Laboratory Co., Ltd.
InventorsShunpei Yamazaki, Kaoru Hatano
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Abstract
Provided is a method to manufacture a liquid crystal display device in which a contact hole for the electrical connection of the pixel electrode and one of the source and drain electrode of a transistor and a contact hole for the processing of a semiconductor layer are formed simultaneously. The method contributes to the reduction of a photography step. The transistor includes an oxide semiconductor layer where a channel formation region is formed.
Claims16
A liquid crystal display device comprising a pixel over a substrate, the pixel comprising:
- a thin film transistor comprising:
- an oxide semiconductor layer;
- and
- a source electrode and a drain electrode which are electrically connected to the oxide semiconductor layer;
- and
- a liquid crystal element comprising:
- a pixel electrode electrically connected to one of the source electrode and the drain electrode;
- and
- a liquid crystal material over the pixel electrode,
- wherein the pixel electrode is in direct contact with a side surface of the oxide semiconductor layer in the pixel.
A liquid crystal display device comprising a pixel over a substrate, the pixel comprising:
- a thin film transistor comprising:
- an oxide semiconductor layer;
- and
- a source electrode and a drain electrode which are electrically connected to the oxide semiconductor layer;
- a liquid crystal element comprising:
- a pixel electrode electrically connected to one of the source electrode and the drain electrode;
- and
- a liquid crystal material over the pixel electrode;
- and
- a capacitor comprising:
- a capacitor wiring;
- and
- a dielectric layer over the capacitor wiring,
- wherein the pixel electrode extends over the dielectric layer so that the pixel electrode overlaps with the capacitor wiring with the dielectric layer interposed therebetween, and
- wherein the pixel electrode is in direct contact with a side surface of the oxide semiconductor layer in the pixel.
Dependencies are inferred from the claim text.