Granted Patent B2

US 12,713,776 · App. 18/273,805 · Granted Aug 18, 2026

Inventors: Shingo Eguchi (Atsugi, JP); Kenichi Okazaki (Atsugi, JP); Hiroki Adachi (Tochigi, JP)

Assignee: SEMICONDUCTOR ENERGY LABORATORY CO., LTD.

H10K59/122H10K50/13H10K59/1201H10K59/124H10K59/131H10K59/871H10K59/8722H10K59/873

Abstract

Claims (44)

1 . A display device comprising:

a first conductive layer;

a first insulating layer over the first conductive layer;

a second conductive layer comprising a first region over the first insulating layer and a second region in an opening provided in the first insulating layer;

a second insulating layer over the first insulating layer;

a third insulating layer over the second region;

an EL layer comprising a third region over the first region, a fourth region over the second insulating layer, and a fifth region over the third insulating layer; and

a third conductive layer over the EL layer,

wherein the opening is provided in the first insulating layer so as to reach a top surface of the first conductive layer, and

wherein a top surface of the first region, a top surface of the second insulating layer, and a top surface of the third insulating layer are substantially level with each other.

2 . The display device according to claim 1 , wherein an end portion of the second conductive layer is in contact with a bottom surface of the EL layer.

3 . The display device according to claim 1 , wherein the EL layer is in contact with the second insulating layer and the third insulating layer.

4 . The display device according to claim 1 , wherein an end portion of the EL layer overlaps with the second insulating layer.

5 . The display device according to claim 1 , wherein the third conductive layer is in contact with the second insulating layer.

6 . A display device comprising:

a first conductive layer;

a second conductive layer;

a first insulating layer over the first conductive layer and the second conductive layer;

a first light-emitting element;

a second light-emitting element; and

a second insulating layer between the first light-emitting element and the second light-emitting element,

wherein the first light-emitting element comprises:

a third conductive layer comprising a first region over the first insulating layer and a second region in a first opening provided in the first insulating layer;

a third insulating layer over the second region; and

a first EL layer comprising a third region over the first region, a fourth region over the second insulating layer, and a fifth region over the third insulating layer,

wherein the second light-emitting element comprises:

a fourth conductive layer comprising a sixth region over the first insulating layer and a seventh region in a second opening provided in the first insulating layer;

a fourth insulating layer over the seventh region; and

a second EL layer comprising an eighth region over the sixth region, a ninth region over the second insulating layer, and a tenth region over the fourth insulating layer,

wherein the first opening is provided in the first insulating layer so as to reach a top surface of the first conductive layer,

wherein the second opening is provided in the first insulating layer so as to reach a top surface of the second conductive layer, and

wherein a top surface of the first region, a top surface of the second insulating layer, a top surface of the third insulating layer, and a top surface of the fourth insulating layer are substantially level with each other.

7 . The display device according to claim 6 , further comprising:

a fifth conductive layer,

wherein the fifth conductive layer overlaps with the first EL layer and the second EL layer, and

wherein the fifth conductive layer is configured to be an upper electrode of the first light-emitting element and an upper electrode of the second light-emitting element.

8 . The display device according to claim 6 ,

wherein an end portion of the third conductive layer is in contact with a bottom surface of the first EL layer, and

wherein an end portion of the fourth conductive layer is in contact with a bottom surface of the second EL layer.

9 . The display device according to claim 7 ,

wherein the first EL layer is in contact with the second insulating layer and the third insulating layer, and

wherein the second EL layer is in contact with the second insulating layer and the fourth insulating layer.

10 . The display device according to claim 6 , wherein an end portion of the first EL layer and an end portion of the second EL layer overlap with the second insulating layer.

11 . The display device according to claim 7 , wherein the fifth conductive layer is in contact with the second insulating layer.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (73)