Display device, electronic apparatus, and display device manufacturing method

Patent metadata

Field	Value
Publication number	US-2019096971-A1
Application number	US-201816134810-A
Country	US
Kind code	A1
Filing date	Sep 18, 2018
Priority date	Sep 28, 2017
Publication date	Mar 28, 2019
Grant date	—

Abstract

An embodiment provides a display device including an insulating layer which is continuous between opposed ends of two adjacent lower electrodes from an upper part of one of the ends to an upper part of the other end, a first organic layer which is disposed over the lower electrodes and the insulating layer, a second organic layer which is disposed over the lower electrodes and the insulating layer with the first organic layer interposed therebetween and includes a light emitting layer, and a second electrode which covers the organic layer. The upper face of the insulating layer includes a recess between the two lower electrodes. The aspect ratio of the recess is 0.5 or more.

First claim

What is claimed is:

1 . A display device comprising:
a first lower electrode and a second lower electrode both disposed over a first insulating layer; a second insulating layer disposed between the first lower electrode and the second lower electrode, on an end of the first lower electrode, and on an end of the second lower electrode; a first organic layer disposed over the first lower electrode, the second insulating layer, and the second lower electrode; a second organic layer disposed over the first organic layer and including a light emitting layer; and an upper electrode disposed over the second organic layer, wherein in a section passing through the first lower electrode, the second lower electrode, the first organic layer, the second organic layer, and the upper electrode, the second insulating layer includes a first part located on the end of the first lower electrode, a second part located on the end of the second lower electrode, and a third part continuous from the first part to the second part, an upper face of the third part of the second insulating layer includes a recess between the first lower electrode and the second lower electrode, and a length of the recess in a first direction in which the first lower electrode is laminated on the first insulating layer is 0.5 times or more a length of the recess in a second direction perpendicular to the first direction.

2 . The display device according to claim 1 , wherein the length of the recess in the first direction is longer than the length of the recess in the second direction perpendicular to the first direction.

3 . The display device according to claim 1 , wherein a cavity is present inside the recess between the third part of the second insulating layer and the first organic layer.

4 . The display device according to claim 1 , wherein the first insulating layer includes a recess in a region between the first lower electrode and the second lower electrode on the first insulating layer.

5 . The display device according to claim 4 , wherein the first insulating layer includes a plurality of the recesses.

6 . A display device comprising:
a first lower electrode and a second lower electrode both disposed over a first insulating layer; a second insulating layer disposed between the first lower electrode and the second lower electrode, on an end of the first lower electrode, and on an end of the second lower electrode; a first organic layer disposed over the first lower electrode, the second insulating layer, and the second lower electrode; a second organic layer disposed over the first organic layer and including a light emitting layer; and an upper electrode disposed over the second organic layer, wherein in a section passing through the first lower electrode, the second lower electrode, the first organic layer, the second organic layer, and the upper electrode, the second insulating layer includes a first part located on the end of the first lower electrode, a second part located on the end of the second lower electrode, and a third part continuous from the first part to the second part, an upper face of the third part of the second insulating layer includes a recess between the first lower electrode and the second lower electrode, and a cavity is present inside the recess between the third part of the second insulating layer and the first organic layer.

7 . The display device according to claim 6 , wherein the first insulating layer includes a recess in a region between the first lower electrode and the second lower electrode on the first insulating layer.

8 . The display device according to claim 7 , wherein the first insulating layer includes a plurality of the recesses.

9 . The display device according to claim 1 , wherein a conductivity of the first organic layer is larger than a conductivity of the second organic layer.

10 . The display device according to claim 1 , wherein the first organic layer includes at least either a hole injection layer or a hole transport layer.

11 . The display device according to claim 1 , wherein
the second insulating layer is disposed over the first insulating layer, the first lower electrode, and the second lower electrode, and the second insulating layer includes a first opening over the first lower electrode and a second opening over the second lower electrode.

12 . The display device according to claim 1 , wherein
in the section, a conductive member is disposed over the first insulating layer between the first lower electrode and the second lower electrode, and the recess on the upper face of the third part is located between the first lower electrode and the conductive member.

13 . The display device according to claim 12 , wherein the conductive member includes the same material as the first lower electrode and the second lower electrode.

14 . The display device according to claim 12 , wherein
in the section, the upper face of the third part further includes a second recess between the conductive member and the first lower electrode.

15 . The display device according to claim 1 , wherein
in the section, an insulating member is disposed over the first insulating layer between the first lower electrode and the second lower electrode, and the recess on the upper face of the third part is located between the first lower electrode and the insulating member.

16 . The display device according to claim 1 , wherein
an upper face of the first insulating layer includes a recess between the first lower electrode and the second lower electrode, and the recess of the third part of the second insulating layer is disposed above the recess of the first insulating layer.

17 . The display device according to claim 1 , wherein a film thickness of the first organic layer inside the recess is smaller than a film thickness of the first organic layer over the second insulating layer.

18 . An electronic apparatus comprising:
the display device according to claim 1 ; and a control unit configured to input a signal to the display device.

19 . A display device manufacturing method comprising:
forming a first insulating layer; forming a first lower electrode and a second lower electrode over the first insulating layer; removing part of the first insulating layer between the first lower electrode and the second lower electrode to form a recess on the first insulating layer; forming a second insulating layer over the first lower electrode, the first insulating layer, and the second lower electrode, the second insulating layer being continuous from an upper part of an end of the first lower electrode to an upper part of an end of the second lower electrode through the recess of the first insulating layer and being in contact with the recess of the first insulating layer; forming a first organic layer over the first lower electrode, the second insulating layer, and the second lower electrode; forming a second organic layer including a light emitting layer over the first organic layer; and forming an upper electrode over the second organic layer.

20 . The display device manufacturing method according to claim 19 , wherein a process of forming the recess on the first insulating layer also serves as an etching process for forming the first lower electrode and the second lower electrode.

Assignees

• Canon Kk

Inventors

• Ukigaya Nobutaka

Classifications

• H01L2227/323

  Electricity · mapped topic

• H01L27/3258

  Electricity · mapped topic

• H01L2251/5315

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic

• H01L27/3272

  Electricity · mapped topic