Granted Patent B2

US 12,740,247 · App. 18/280,287 · Granted Sep 15, 2026

Inventors: Kenichi Okazaki (Atsugi, JP); Yasutaka Nakazawa (Tochigi, JP); Rai Sato (Tochigi, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

H10K59/122H10K50/13H10K50/19H10K59/353H10K59/80515H10K59/80517H10K59/65

Abstract

Claims (85)

1 . A display apparatus comprising a first light-emitting device and a second light-emitting device,

wherein the first light-emitting device comprises a first conductive layer, a second conductive layer over the first conductive layer, a first light-emitting layer over the second conductive layer, and a common electrode over the first light-emitting layer,

wherein the second light-emitting device comprises a third conductive layer, a fourth conductive layer over the third conductive layer, a second light-emitting layer over the fourth conductive layer, and the common electrode over the second light-emitting layer,

wherein the second conductive layer covers a top surface and a side surface of the first conductive layer,

wherein the fourth conductive layer covers a top surface and a side surface of the third conductive layer,

wherein an end portion of the first light-emitting layer is aligned or substantially aligned with an end portion of the second conductive layer, and

wherein an end portion of the second light-emitting layer is aligned or substantially aligned with an end portion of the fourth conductive layer.

2 . The display apparatus according to claim 1 , further comprising a first insulating layer,

wherein the first insulating layer covers side surfaces of the first light-emitting layer, the second light-emitting layer, the second conductive layer, and the fourth conductive layer, and

wherein the common electrode is positioned over the first insulating layer.

3 . The display apparatus according to claim 2 , further comprising a second insulating layer,

wherein the first insulating layer comprises an inorganic material, and

wherein the second insulating layer comprises an organic material and overlaps with the side surfaces of the first light-emitting layer and the second light-emitting layer with the first insulating layer therebetween.

4 . The display apparatus according to claim 2 , further comprising a first layer,

wherein the first layer is positioned over the first light-emitting layer,

wherein in a cross-sectional view, one end portion of the first layer is aligned or substantially aligned with the end portion of the first light-emitting layer and the end portion of the second conductive layer, and the other end portion of the first layer is positioned over the first light-emitting layer, and

wherein the first insulating layer covers a top surface of the first layer.

5 . The display apparatus according to claim 4 ,

wherein the first layer has a stacked-layer structure of an inorganic insulating layer and a conductive layer over the inorganic insulating layer.

6 . The display apparatus according to claim 2 ,

wherein the first light-emitting device comprises a common layer between the first light-emitting layer and the common electrode,

wherein the second light-emitting device comprises the common layer between the second light-emitting layer and the common electrode, and

wherein the common layer comprises at least one of a hole-injection layer, a hole-transport layer, an electron-transport layer, and an electron-injection layer.

7 . A display module comprising:

the display apparatus according to claim 1 ; and

at least one of a connector and an integrated circuit.

8 . An electronic device comprising:

the display module according to claim 7 ; and

at least one of a housing, a battery, a camera, a speaker, and a microphone.

9 . A display apparatus comprising a first light-emitting device and a second light-emitting device,

wherein the first light-emitting device comprises a first conductive layer, a second conductive layer over the first conductive layer, a first EL layer over the second conductive layer, and a common electrode over the first EL layer,

wherein the second light-emitting device comprises a third conductive layer, a fourth conductive layer over the third conductive layer, a second EL layer over the fourth conductive layer, and the common electrode over the second EL layer,

wherein the first EL layer comprises a first light-emitting unit over the second conductive layer, a first charge-generation layer over the first light-emitting unit, and a second light-emitting unit over the first charge-generation layer,

wherein the second EL layer comprises a third light-emitting unit over the fourth conductive layer, a second charge-generation layer over the third light-emitting unit, and a fourth light-emitting unit over the second charge-generation layer,

wherein the second conductive layer covers a side surface of the first conductive layer,

wherein the fourth conductive layer covers a side surface of the third conductive layer,

wherein an end portion of the first EL layer is aligned or substantially aligned with an end portion of the second conductive layer, and

wherein an end portion of the second EL layer is aligned or substantially aligned with an end portion of the fourth conductive layer.

10 . The display apparatus according to claim 9 , further comprising a first insulating layer,

wherein the first insulating layer covers side surfaces of the first EL layer, the second EL layer, the second conductive layer, and the fourth conductive layer, and

wherein the common electrode is positioned over the first insulating layer.

11 . The display apparatus according to claim 10 , further comprising a second insulating layer,

wherein the first insulating layer comprises an inorganic material, and

wherein the second insulating layer comprises an organic material and overlaps with the side surfaces of the first EL layer and the second EL layer with the first insulating layer therebetween.

12 . The display apparatus according to claim 10 , further comprising a first layer,

wherein the first layer is positioned over the first EL layer,

wherein in a cross-sectional view, one end portion of the first layer is aligned or substantially aligned with the end portion of the first EL layer and the end portion of the second conductive layer, and the other end portion of the first layer is positioned over the first EL layer, and

wherein the first insulating layer covers a top surface of the first layer.

13 . The display apparatus according to claim 12 ,

wherein the first layer has a stacked-layer structure of an inorganic insulating layer and a conductive layer over the inorganic insulating layer.

14 . The display apparatus according to claim 9 ,

wherein the first light-emitting device comprises a common layer between the first EL layer and the common electrode,

wherein the second light-emitting device comprises the common layer between the second EL layer and the common electrode, and

wherein the common layer comprises at least one of a hole-injection layer, a hole-transport layer, an electron-transport layer, and an electron-injection layer.

15 . A display module comprising:

the display apparatus according to claim 9 ; and

at least one of a connector and an integrated circuit.

16 . An electronic device comprising:

the display module according to claim 15 ; and

at least one of a housing, a battery, a camera, a speaker, and a microphone.

17 . A method of manufacturing a display apparatus, comprising:

forming an island-shaped first conductive layer and an island-shaped second conductive layer over an insulating surface;

forming a first conductive film over the first conductive layer and the second conductive layer;

forming a first layer over the first conductive film;

forming a first sacrificial layer over the first layer;

processing the first layer and the first sacrificial layer so that an end portion of the first layer and an end portion of the first sacrificial layer are positioned outward from an end portion of the first conductive layer and a region of the first conductive film that overlaps with the second conductive layer is exposed at least partly;

forming a second layer over the first sacrificial layer and the first conductive film;

forming a second sacrificial layer over the second layer;

processing the second layer and the second sacrificial layer so that an end portion of the second layer and an end portion of the second sacrificial layer are positioned outward from an end portion of the second conductive layer and the first sacrificial layer is exposed at least partly;

processing the first conductive film with the first sacrificial layer and the second sacrificial layer used as hard masks to form a third conductive layer between the first conductive layer and the first layer and a fourth conductive layer between the second conductive layer and the second layer;

removing the first sacrificial layer and the second sacrificial layer at least partly so that the first layer and the second layer are exposed at least partly; and

forming a common electrode over the first layer and the second layer.

18 . The method of manufacturing a display apparatus, according to claim 17 , comprising after the formation of the third conductive layer and the fourth conductive layer and before the formation of the common electrode,

forming a first insulating film, the first insulating film covering at least a side surface of the third conductive layer, a side surface of the fourth conductive layer, a side surface of the first layer, a side surface of the second layer, a side surface and a top surface of the first sacrificial layer, and a side surface and a top surface of the second sacrificial layer; and

processing the first insulating film to form a first insulating layer, one end portion of the first insulating layer being positioned over the first layer and the other end portion of the first insulating layer being positioned over the second layer in a cross-sectional view.

19 . The method of manufacturing a display apparatus, according to claim 18 , comprising

forming the first insulating film using an inorganic material;

forming a second insulating film over the first insulating film using an organic material; and

processing the second insulating film to form a second insulating layer, one end portion of the second insulating layer being positioned over the first layer and the other end portion of the second insulating layer being positioned over the second layer in a cross-sectional view.

20 . The method of manufacturing a display apparatus, according to claim 19 ,

wherein a photosensitive resin is used as the organic material.

21 . The method of manufacturing a display apparatus, according to claim 17 ,

wherein in the step of removing the first sacrificial layer at least partly, the first sacrificial layer is processed so that in a cross-sectional view, one end portion of the first sacrificial layer is aligned or substantially aligned with the end portion of the first layer and the other end portion of the first sacrificial layer is positioned over the first layer.

22 . The method of manufacturing a display apparatus, according to claim 17 ,

wherein before the common electrode is formed, at least one of a hole-injection layer, a hole-transport layer, an electron-transport layer, and an electron-injection layer is formed as a common layer over the first layer and the second layer.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (67)