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

Patent metadata

Field	Value
Publication number	US-2018315946-A1
Application number	US-201815959067-A
Country	US
Kind code	A1
Filing date	Apr 20, 2018
Priority date	Apr 28, 2017
Publication date	Nov 1, 2018
Grant date	—

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 device comprising:
a first electrode arranged on a first insulation layer; a second insulation layer configured to cover an end portion 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 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, is in contact with the first portion and the second portion, and forms a recessed portion of the second insulation layer, the recessed portion being recessed toward the first electrode.

2 . The organic light emitting device according to claim 1 , wherein, in a planar view with respect to a surface parallel to a surface of the first insulation layer on which the first electrode is arranged, 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 a direction parallel to a surface of the first insulation layer on which the first electrode is to be arranged.

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

10 . 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.

11 . 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.

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

13 . 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.

14 . 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 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 and is in contact with the first portion and the second portion, and wherein, in the cross section, the first portion protrudes relative to the third portion in a direction parallel to the surface of the first insulation layer.

15 . A method for producing an organic light emitting device, the method comprising:
forming a first metal layer on a first insulation layer and forming a second metal layer on the first metal layer formed on the first insulation layer; forming a first electrode by etching the first metal layer and the second metal layer, the first electrode being configured in such a way that the second metal layer protrudes relative to the first metal layer in a direction parallel to a surface of the first insulation layer on which the first metal layer is arranged; forming a second insulation layer configured to cover an end portion of the first electrode; forming an organic layer including a light emission layer on the first electrode and the first insulation layer; and forming a second electrode on the organic layer, wherein the second insulation layer is formed in such a way that a film thickness of the second insulation layer on the first electrode in a direction perpendicular to the surface is greater than a length by which the second metal layer protrudes relative to the first metal layer.

16 . The method for producing the organic light emitting device according to claim 15 , wherein, in the direction perpendicular to the surface, a film thickness of the second insulation layer on the first electrode is greater than a film thickness of the end portion of the first electrode covered with the second insulation layer.

17 . The method for producing the organic light emitting device according to claim 15 , wherein the second metal layer has a protruding portion that is formed by using an etching rate difference between the first metal layer and the second metal layer.

18 . The method for producing the organic light emitting device according to claim 15 , wherein the second insulation layer is formed by chemical vapor deposition (CVD) using gas including tetraethyl orthosilicate (TEOS).

Assignees

• Canon Kk

Inventors

• Nagatomo Yasuhiro
• Ukigaya Nobutaka

Classifications

• H01L51/5088

  Electricity · mapped topic

• H01L51/5203 Primary

  Electricity · mapped topic

• H01L51/5056

  Electricity · mapped topic

• H01L27/3246

  Electricity · mapped topic

• H10K59/131

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