Organic light emitting device, image capturing device, and method for producing organic light emitting device

Patent metadata

Field	Value
Publication number	US-11004916-B2
Application number	US-201815959067-A
Country	US
Kind code	B2
Filing date	Apr 20, 2018
Priority date	Apr 28, 2017
Publication date	May 11, 2021
Grant date	May 11, 2021

Abstract

An organic light emitting device including a first electrode arranged on a first insulation layer, a second insulation layer that covers an end of the first electrode, an organic layer arranged on the first electrode and the second insulation layer and including a light emission layer, and a second electrode arranged on the organic layer, wherein in a cross section including the first insulation layer, the first electrode, and the second insulation layer, the second insulation layer has an eaves shape.

First claim

What is claimed is:

1. An organic light emitting deice comprising:
a first electrode arranged on a surface of a first insulation layer;
a second insulation layer configured to cover a top edge of the first electrode;
an organic layer, a first portion of the organic layer being arranged on the first electrode and the second insulation layer and including a light emission layer; and
a second electrode arranged on the organic layer,
wherein, in a cross section including the first insulation layer, the first electrode, and the second insulation layer, the second insulation layer includes a first portion that covers the top edge of the first electrode, a second portion that is in contact with the first insulation layer, and a third portion that is arranged between the first portion and the second portion in a first direction perpendicular to the surface of the first insulation layer,
wherein the third portion is in contact with the first portion and the second portion, wherein a side surface of the third portion has a recessed portion of the second insulation layer, the recessed portion being recessed toward the first electrode in a second direction paralleled to the surface of the first insulation layer,
wherein the recessed portion is located between a second portion of the organic layer and the first electrode in the second direction, the organic layer extending continuously from the first portion to the second portion.

2. The organic light emitting device according to claim 1 , wherein, in a planar view with respect to a surface parallel to the surface of the first insulation layer, the third portion of the second insulation layer has an outer edge arranged inside an outer edge of the first portion.

3. The organic light emitting device according to claim 1 ,
wherein the first electrode includes a first metal layer and a second metal layer arranged on the first metal layer, and
wherein, in the cross section, the second metal layer protrudes relative to the first metal layer in the second direction.

4. The organic light emitting device according to claim 3 , wherein, on the first electrode, the second insulation layer has a film thickness in the first direction, the film thickness being greater than a length of a protrusion of the second metal layer protruding relative to the first metal layer in the second direction.

5. The organic light emitting device according to claim 3 , wherein, on the first electrode, the second insulation layer has a film thickness in the first direction, the film thickness being greater than a film thickness of a portion of the first electrode in contact with the organic layer in the second direction.

6. The organic light emitting device according to claim 3 , wherein the third portion of the second insulation layer is in contact with the first metal layer of the first electrode.

7. The organic light emitting device according to claim 3 , wherein, in the cross section, the first metal layer has a length in the second direction, the length being increased toward the first insulation layer from the second metal layer.

8. The organic light emitting device according to claim 3 , wherein the first metal layer includes a portion in contact with the first insulation layer, and an angle formed by a side surface of the portion of the first metal layer and a bottom surface of the first electrode is 80 degrees or less.

9. The organic light emitting device according to claim 1 , wherein the organic layer includes a hole injection layer between the first electrode and the light emission layer.

10. The organic light emitting device according to claim 1 , wherein the first electrode includes a first metal layer and a second metal layer arranged on the first metal layer.

11. The organic light emitting device according to claim 10 ,
wherein the first metal layer includes aluminum, and
wherein the second metal layer includes any one of titanium, molybdenum, and tungsten.

12. An image capturing device comprising:
an image sensor element on which light is incident;
a control unit to which an output from the image sensor element is input; and
the organic light emitting device according to claim 1 , the organic light emitting device being configured to receive a signal from the control unit.

13. The organic light emitting device according to claim 1 , wherein the recessed portion comprises at least two sides inclined to the first insulation layer.

14. The organic light emitting device according to claim 1 , wherein the organic layer on the first electrode has a film thickness that is greater than a film thickness of the second insulation layer on the first electrode.

15. The organic light emitting device according to claim 14 , wherein the organic layer fills the recess.

16. The organic light emitting device according to claim 1 , further comprising another organic light emitting device next to the organic light emitting device,
wherein the other organic light emitting device comprises:
a first electrode;
an organic layer arranged on the first electrode; and
a second electrode arranged on the organic layer, and

wherein the organic layer of the other organic light emitting device is continuous with the organic layer of the organic light emitting device.

17. An organic light emitting device comprising:
a first electrode arranged on a surface of a first insulation layer;
a second insulation layer configured to cover an end portion of the first electrode;
an organic layer, a first portion of the organic layer being arranged on the first electrode and the second insulation layer and including a light emission layer; and
a second electrode arranged on the organic layer,
wherein, in a cross section including the first insulation layer, the first electrode, and the second insulation layer, the second insulation layer includes a first portion that covers the end portion of the first electrode, a second portion that is in contact with the first insulation layer, and a third portion that is arranged between the first portion and the second portion in a first direction perpendicular to the surface of the first insulation layer,
wherein the third portion is in contact with the first portion and the second portion,
wherein, in the cross section, the first portion protrudes relative to the third portion from the first electrode to the organic layer in a second direction parallel to the surface of the first insulation layer, and
wherein the third portion is located between a second portion of the organic layer and the first electrode in the second direction, the organic layer extending continuously from the first portion to the second portion.

18. The organic light emitting device according to claim 17 , further comprising another organic light emitting device next to the organic light emitting device, wherein the other organic light emitting device comprises: a first electrode; an Organic layer arranged on the first electrode; and a second electrode arranged on the organic layer, and wherein the organic layer of the other organic light emitting device is continuous with the organic layer of the organic light emitting device.

19. The organic light emitting device according to claim 17 , wherein, in a planar view with respect to a surface parallel to the surface of the first insulation layer, the third portion of the second insulation layer has an outer edge arranged inside an outer edge of the first portion.

20. The organic light emitting device according to claim 17 ,
wherein the first electrode

Assignees

• Canon Kk

Inventors

• Nagatomo Yasuhiro
• Ukigaya Nobutaka

Classifications

• H10K59/131

  Interconnections, e.g. wiring lines or terminals · CPC title

• H10K59/80515

  characterised by their shape · CPC title

• H01L51/5088

  Electricity · mapped topic

• H01L51/5209

  Electricity · mapped topic

• H01L27/3246 Primary

  Electricity · mapped topic