Patent ID: 11869453
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A display device comprising:
a substrate;
a first insulating layer over the substrate;
a second insulating layer over the substrate;
a semiconductor layer comprising silicon over the first insulating layer and the second insulating layer;
a third insulating layer over the semiconductor layer;
a fourth insulating layer over the third insulating layer;
a gate electrode over the fourth insulating layer;
an interlayer insulating film over the gate electrode;
a first conductive film provided in an opening of the interlayer insulating film, the first conductive film having a stacked-layer structure;
a fifth insulating layer over and in contact with side surfaces and a top surface of the first conductive film and over and in contact with the interlayer insulating film;
a second conductive film functioning as a pixel electrode over and electrically connected to the first conductive film through an opening of the fifth insulating layer;
a light-blocking film overlapping with the semiconductor layer, the gate electrode, and the pixel electrode;
a pair of LDD regions in the semiconductor layer; and
a liquid crystal display element,
wherein a bottom surface of the fifth insulating layer is provided below a top surface of the gate electrode,
wherein the second conductive film comprises a region overlapping with the semiconductor layer,
wherein the gate electrode comprises a region not overlapping with the second conductive film,
wherein the gate electrode overlaps with a channel region of the semiconductor layer, and
wherein the light-blocking film overlaps with the opening of the interlayer insulating film.