Organic EL device and method for manufacturing organic EL device

Patent metadata

Field	Value
Publication number	US-9312515-B2
Application number	US-201314402211-A
Country	US
Kind code	B2
Filing date	Apr 19, 2013
Priority date	May 22, 2012
Publication date	Apr 12, 2016
Grant date	Apr 12, 2016

Abstract

Provided is an organic EL device having high reliability, wherein decrease of the luminance due to the generation of a gas such as water vapor is suppressed. This organic EL device is provided with: an interlayer insulating film that is formed on a substrate; a lower electrode that is formed above the interlayer insulating film so as to correspond to a light emitting region; a light emitting layer that is formed on the lower electrode in the light emitting region; and an upper electrode that is formed on the light emitting layer. A gap is formed between the interlayer insulating film and the lower electrode.

First claim

What is claimed is:

1. An organic electroluminescent device having a plurality of pixels each having a light-emitting region therein, comprising:
a substrate;
an insulating layer formed on the substrate;
a plurality of lower electrodes formed over the insulating layer, respectively in the plurality of light-emitting regions;
light-emitting layers formed respectively on the lower electrodes in the plurality of light-emitting regions; and
an upper electrode formed on the light-emitting layers,
wherein a void is formed between the insulating layer and the lower electrodes thereover, and
wherein in plan view, an opening in the upper electrode is in a region between adjacent pixels, the opening being a through hole communicating with said void.

2. The organic electroluminescent device according to claim 1 , further comprising: another insulating layer formed to cover edges of the lower electrodes.

3. The organic electroluminescent device according to claim 1 , further comprising:
thin film transistors formed on the substrate and respectively connected to the lower electrodes.

4. The organic electroluminescent device according to claim 1 , wherein the opening is parallel to either a longer side direction or a shorter side direction of the pixels.

5. The organic electroluminescent device according to claim 1 , wherein the opening surrounds a periphery of each of the pixels.

6. The organic electroluminescent device according to claim 3 , wherein the light-emitting layer and the upper electrode are supported by the corresponding lower electrode that is connected to the thin film transistor through the void.

7. The organic electroluminescent device according to claim 2 , further comprising:
thin film transistors formed on the substrate and respectively connected to the lower electrodes.

8. The organic electroluminescent device according to claim 1 , further comprising:
an upper insulating layer covering edges of the lower electrodes,
wherein, in plan view, another opening in a portion of the upper insulating layer is in a region between adjacent pixels, said another opening being another through hole connecting said opening in the upper electrode to said void.

Assignees

• Sharp Kk

Inventors

• Inoue Satoshi

Classifications

• H10K71/40

  Thermal treatment, e.g. annealing in the presence of a solvent vapour · CPC title

• H10K50/844

  Encapsulations · CPC title

• H10K59/123 Primary

  Connection of the pixel electrodes to the thin film transistors [TFT] · CPC title

• H01L51/5253 Primary

  Electricity · mapped topic

• H01L27/3258

  Electricity · mapped topic