Light emitting device and electronic device

Patent metadata

Field	Value
Publication number	US-9929220-B2
Application number	US-65173410-A
Country	US
Kind code	B2
Filing date	Jan 4, 2010
Priority date	Jan 8, 2009
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

Thinned and highly reliable light emitting elements are provided. Further, light emitting devices in which light emitting elements are formed over flexible substrates are manufactured with high yield. One light emitting device includes a flexible substrate, a light emitting element formed over the flexible substrate, and a resin film covering the light emitting element, and in the light emitting element, an insulating layer serving as a partition has a convex portion and the convex portion is embedded in the resin film, that is, the resin film covers an entire surface of the insulating layer and an entire surface of the second electrode, whereby the light emitting element can be thinned and highly reliable. In addition, a light emitting device can be manufactured with high yield in a manufacturing process thereof.

First claim

What is claimed is:

1. A light emitting device comprising:
a substrate;
a first insulating layer over the substrate;
a light emitting element over the first insulating layer, comprising:
a first electrode over the first insulating layer;
a second insulating layer covering an end portion of the first electrode;
an EL layer in contact with the first electrode; and
a second electrode in contact with the EL layer;

a third insulating layer in contact with the second insulating layer and whose contact area with the second insulating layer is smaller than a top area of the second insulating layer; and
a resin film covering the light emitting element,
wherein the resin film is in contact with a first part of a surface of the second insulating layer and a second part of a surface of the third insulating layer, and
wherein the third insulating layer comprises an organic material.

2. An electronic device comprising the light emitting device according to claim 1 .

3. The light emitting device according to claim 1 , wherein the second insulating layer and the third insulating layer are formed of the same material.

4. A light emitting device comprising:
a first substrate;
a first insulating layer over the first substrate;
a light emitting element over the first insulating layer, comprising:
a first electrode over the first insulating layer;
a second insulating layer covering an end portion of the first electrode and having a convex portion;
an EL layer in contact with the first electrode; and
a second electrode in contact with the EL layer;

a third insulating layer in contact with the second insulating layer and whose contact area with the second insulating layer is smaller than a top area of the second insulating layer; and
a resin film covering the light emitting element,
wherein the resin film is in contact with a first part of a surface of the second insulating layer and a second part of a surface of the third insulating layer, and
wherein the convex portion comprises an organic material.

5. The light emitting device according to claim 4 , wherein an impact release layer is formed on at least one of the first substrate and the second substrate.

6. The light emitting device according to claim 4 , wherein a desiccant is disposed between the EL layer and the second substrate.

7. The light emitting device according to claim 4 , wherein a thickness of the first substrate is equal to a thickness of the second substrate.

8. An electronic device comprising the light emitting device according to claim 4 .

9. The light emitting device according to claim 4 , further comprising a second substrate provided over the resin film.

10. A light emitting device comprising:
a first flexible substrate;
a first insulating layer over the first flexible substrate;
a light emitting element over the first insulating layer, comprising:
a first electrode over the first insulating layer;
a second insulating layer covering an end portion of the first electrode;
an EL layer in contact with the first electrode;
a second electrode in contact with the EL layer;

a third insulating layer in contact with the second insulating layer and whose contact area with the second insulating layer is smaller than a top area of the second insulating layer; and
a resin film covering the light emitting element,
wherein the resin film is in contact with a first part of a surface of the second insulating layer and a second part of a surface of the third insulating layer, and
wherein the third insulating layer comprises an organic material.

11. An electronic device comprising the light emitting device according to claim 10 .

12. A light emitting device comprising:
a first flexible substrate;
a first insulating layer over the first flexible substrate;
a light emitting element over the first insulating layer, comprising:
a first electrode over the first insulating layer;
a second insulating layer covering an end portion of the first electrode;
an EL layer in contact with the first electrode; and
a second electrode in contact with the EL layer;

a third insulating layer in contact with the second insulating layer and whose contact area with the second insulating layer is smaller than a top area of the second insulating layer; and
a resin film in which the third insulating layer is embedded and which covers the light emitting element;
wherein the resin film is in contact with a first part of a surface of the second insulating layer and a second part of a surface of the third insulating layer.

13. An electronic device comprising the light emitting device according to claim 12 .

14. The light emitting device according to claim 12 , further comprising a second flexible substrate provided over the resin film.

Assignees

• Yamazaki Shunpei
• Katayama Masahiro
• Eguchi Shingo
• Oikawa Yoshiaki
• Nakamura Ami
• Seo Satoshi
• Hatano Kaoru
• Semiconductor Energy Lab

Inventors

• Yamazaki Shunpei
• Katayama Masahiro
• Eguchi Shingo
• Oikawa Yoshiaki
• Nakamura Ami
• Seo Satoshi
• Hatano Kaoru

Classifications

• H05B33/12

  Light sources with substantially two-dimensional [2D] radiating surfaces · CPC title

• H05B33/04

  Sealing arrangements {, e.g. against humidity} · CPC title

• H10K77/111

  Flexible substrates · CPC title

• H10K59/873 Primary

  Encapsulations · CPC title

• H01L51/524

  Electricity · mapped topic