Patent ID: 11935896
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 2:
3. A display device comprising:
a transistor;
a pixel electrode electrically connected to the transistor via a first contact hole;
a first conductive layer having a region in contact with a substrate and having a region functioning as a gate electrode of the transistor;
a second conductive layer having a region in contact with the substrate and comprising a same metal material as the first conductive layer;
a gate insulating layer over and in contact with the first conductive layer and the second conductive layer;
a semiconductor layer over and in contact with the gate insulating layer and having a region overlapping with the first conductive layer;
a third conductive layer and a fourth conductive layer electrically connected to the semiconductor layer and having a region in contact with the gate insulating layer; and
a fifth conductive layer over and in contact with the gate insulating layer and having a region overlapping with the second conductive layer,
wherein the pixel electrode has a region overlapping with the fifth conductive layer,
wherein the third conductive layer has a region functioning as a source electrode of the transistor and a region functioning as a source line,
wherein the fourth conductive layer has a region functioning as a drain electrode of the transistor,
wherein the pixel electrode comprises a plurality of slits,
wherein the second conductive layer has a region overlapping with one of the plurality of slits without the fifth conductive layer provided therebetween and a region overlapping with the third conductive layer,
wherein the third conductive layer does not overlap with the plurality of slits,
wherein the fourth conductive layer does not overlap with the plurality of slits,
wherein a second contact hole overlaps with the pixel electrode and the fifth conductive layer,
wherein, in a top view, a region of the third conductive layer extends in a first direction, and
wherein the fourth conductive layer and the fifth conductive layer are lined up in the first direction.