Patent ID: 11862643
Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A display device comprising a pixel portion, the pixel portion comprising:
a transistor comprising:
a gate electrode;
a first insulating layer over the gate electrode;
an oxide semiconductor layer over the first insulating layer, the oxide semiconductor layer comprising a channel formation region;
a second insulating layer over and in contact with the oxide semiconductor layer, the second insulating layer overlapping with the channel formation region;
a source electrode over and in contact with a first region of the oxide semiconductor layer; and
a drain electrode over and in contact with a second region of the oxide semiconductor layer;

a capacitor;
a light-emitting element electrically connected to the transistor, the light-emitting element comprising:
a first electrode;
an EL layer over the first electrode; and
a second electrode over the EL layer;

a color filter under the first electrode; and
a third insulating layer in contact with a side surface and a top surface of the oxide semiconductor layer,
wherein the oxide semiconductor layer comprises indium, gallium, and zinc,
wherein the second insulating layer is different from the third insulating layer,
wherein each of the second insulating layer and the third insulating layer comprises silicon oxide,
wherein a carrier concentration of the first region is higher than a carrier concentration of the channel formation region,
wherein a carrier concentration of the second region is higher than the carrier concentration of the channel formation region,
wherein the second insulating layer comprises a region overlapping with the capacitor,
wherein the first electrode comprises a region overlapping with the channel formation region and the capacitor, and
wherein the capacitor comprises the first insulating layer as a dielectric.