Granted Patent B2

US 12,727,356 · App. 17/570,487 · Granted Sep 1, 2026

Inventors: Shunpei Yamazaki (Setagaya, JP); Takayuki Ikeda (Atsugi, JP); Kenichi Okazaki (Tochigi, JP); Yasumasa Yamane (Atsugi, JP); Hajime Kimura (Atsugi, JP); Tatsuya Onuki (Atsugi, JP)

Assignee: Semiconductor Energy Laboratory Co., Ltd.

H10K59/35H10K59/122H10K59/131H10K59/40H10K59/80522H10K50/171H10K59/1201H10K59/123H10K71/00

Abstract

Claims (74)

1 . A display panel comprising:

a first light-emitting device comprising a first electrode, a second electrode, and a first unit between the first electrode and the second electrode;

a second light-emitting device comprising a third electrode, a fourth electrode, and a second unit between the third electrode and the fourth electrode;

a first insulating film comprising a region between the first light-emitting device and the second light-emitting device;

a first conductive film over the first insulating film; and

a second conductive film electrically connected to the first conductive film,

wherein the second conductive film is outside a display region,

wherein the first electrode, the third electrode, and the second conductive film are on a same surface,

wherein the first insulating film has a single-layer structure,

wherein the first insulating film is in contact with a top surface and a side surface of the first electrode, a top surface and a side surface of the second electrode, a side surface of the first unit, a side surface of the second unit, a top surface and a side surface of the third electrode, a top surface and a side surface of the fourth electrode, and a top surface and a side surface of the second conductive film,

wherein the first insulating film comprises a first opening overlapping with the second electrode, a second opening overlapping with the fourth electrode, and a third opening overlapping with the second conductive film,

wherein the first conductive film is electrically connected to the second electrode in the first opening, to the fourth electrode in the second opening, and to the second conductive film in the third opening,

wherein the first unit is configured to emit first light, and

wherein the second unit is configured to emit second light.

2 . The display panel according to claim 1 , wherein a hue of the second light is different from a hue of the first light.

3 . The display panel according to claim 1 ,

wherein the first light-emitting device comprises a first layer,

wherein the first layer is sandwiched between the second electrode and the first unit,

wherein the second light-emitting device comprises a second layer,

wherein the second layer is sandwiched between the fourth electrode and the second unit, and

wherein the first layer and the second layer comprise the same electron-injection material.

4 . The display panel according to claim 3 , wherein the first layer and the second layer comprise lithium fluoride.

5 . A data processing device comprising:

at least one of a keyboard, a hardware button, a pointing device, a touch sensor, an illuminance sensor, an imaging device, an audio input device, a sight input device, and an attitude detection device; and

the display panel according to claim 1 .

6 . A display panel comprising:

a first light-emitting device comprising a first electrode, a second electrode, a first unit between the first electrode and the second electrode, and a first layer between the second electrode and the first unit;

a second light-emitting device comprising a third electrode, a fourth electrode, a second unit between the third electrode and the fourth electrode, and a second layer between the fourth electrode and the second unit;

a first insulating film comprising a region between the first light-emitting device and the second light-emitting device;

a second insulating film over the first insulating film;

a first conductive film over the second insulating film; and

a second conductive film electrically connected to the first conductive film,

wherein the second conductive film is outside a display region,

wherein the first electrode, the third electrode, and the second conductive film are on a same surface,

wherein the first insulating film has a single-layer structure,

wherein the first insulating film is in contact with a top surface and a side surface of the first electrode, a top surface and a side surface of the second electrode, a side surface of the first unit, a side surface of the second unit, a side surface of the first layer, a side surface of the second layer, a top surface and a side surface of the third electrode, a top surface and a side surface of the fourth electrode, and a top surface and a side surface of the second conductive film,

wherein the first insulating film comprises a first opening overlapping with the second electrode, a second opening overlapping with the fourth electrode, and a third opening overlapping with the second conductive film,

wherein the second insulating film comprises a fourth opening overlapping with the first opening, a fifth opening overlapping with the second opening, and a sixth opening overlapping with the third opening,

wherein a width of the first opening is substantially the same as a width of the fourth opening,

wherein a width of the second opening is substantially the same as a width of the fifth opening,

wherein the first conductive film is electrically connected to the second electrode in the first opening and the fourth opening, to the fourth electrode in the second opening and the fifth opening, and to the second conductive film in the third opening and the sixth opening,

wherein the first unit is configured to emit first light,

wherein the second unit is configured to emit second light, and

wherein the first layer and the second layer comprise the same electron-injection material.

7 . The display panel according to claim 6 , wherein a hue of the second light is different from a hue of the first light.

8 . The display panel according to claim 6 , wherein the first layer and the second layer comprise lithium fluoride.

9 . A data processing device comprising:

at least one of a keyboard, a hardware button, a pointing device, a touch sensor, an illuminance sensor, an imaging device, an audio input device, a sight input device, and an attitude detection device; and

the display panel according to claim 6 .

10 . A method for manufacturing a display panel, comprising:

a first step of forming a first electrode, a second electrode, and a third electrode;

a second step of forming a first unit over the first electrode, the second electrode, and the third electrode;

a third step of forming a first sacrifice layer over the first unit;

a fourth step of removing parts of the first sacrifice layer over the second electrode and the third electrode by a photoetching method so that the first sacrifice layer is formed into a shape overlapping with the first electrode;

a fifth step of removing parts of the first unit over the second electrode and the third electrode by an etching method so that the first unit is formed into a shape overlapping with the first sacrifice layer;

a sixth step of forming a second unit over the first sacrifice layer, the second electrode, and the third electrode;

a seventh step of forming a second sacrifice layer on the second unit, an eighth step of removing parts of the second sacrifice layer over the first sacrifice layer and the third electrode by a photoetching method so that the second sacrifice layer is formed into a shape overlapping with the second electrode;

a ninth step of removing parts of the second unit over the first sacrifice layer and the third electrode by an etching method so that the second unit is formed into a shape overlapping with the second sacrifice layer;

a tenth step of forming a third unit over the first sacrifice layer, the second sacrifice layer, and the third electrode;

an eleventh step of forming a third sacrifice layer over the third unit;

a twelfth step of removing parts of the third sacrifice layer over the first sacrifice layer and the second sacrifice layer by a photoetching method so that the third sacrifice layer is formed into a shape overlapping with the third electrode;

a thirteenth step of removing parts of the third unit over the first sacrifice layer and the second sacrifice layer by an etching method so that the third unit is formed into a shape overlapping with the third sacrifice layer;

a fourteenth step of removing the first sacrifice layer, the second sacrifice layer, and the third sacrifice layer by an etching method;

a fifteenth step of forming a first layer over the first unit, the second unit, and the third unit;

a sixteenth step of forming a fourth electrode over the first layer;

a seventeenth step of forming slits in surroundings of the first electrode, the second electrode, and the third electrode by a photoetching method to form a first light-emitting device, a second light-emitting device, and a third light-emitting device;

an eighteenth step of forming an insulating film covering the first light-emitting device, the second light-emitting device, the third light-emitting device, and sidewalls of the slits;

a nineteenth step of forming a first opening in the insulating film over the first light-emitting device, a second opening in the insulating film over the second light-emitting device, and a third opening in the insulating film over the third light-emitting device by a photoetching method; and

a twentieth step of forming a conductive film covering the first opening, the second opening, and the third opening.

11 . The method for manufacturing the display panel according to claim 10 ,

wherein the insulating film comprises a first insulating film and a second insulating film over the first insulating film, and

wherein a side surface of the second insulating film is aligned with a side surface of the first insulating film.

12 . The method for manufacturing the display panel according to claim 11 , wherein the first insulating film is an inorganic film.

13 . The method for manufacturing the display panel according to claim 11 , wherein the first insulating film comprises at least one of an aluminum oxide and a silicon nitride.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (60)