# US 12,010,867 B2 · OLED with a flattening layer between two barrier layers

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- Number: US 12,010,867 B2
- Document ID: US12010867B2
- Status: Granted
- Kind: B2
- Application number: 18/164,686
- Filed: 2023-02-06
- Published: 2023-06-08
- Granted: 2024-06-11
- Earliest claimed: 2013-02-12
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Daisuke Kato; Kaichi Fukuda
- Web page: https://patentgrep.com/patent/US12010867B2

## CPC

- H10K 59/12: Active-matrix OLED [AMOLED] displays
- H10K 50/11: characterised by the electroluminescent [EL] layers
- H10K 59/1216: {the pixel elements being capacitors}
- H10K 59/122: Pixel-defining structures or layers, e.g. banks
- H10K 59/124: Insulating layers formed between TFT elements and OLED elements
- H10K 59/8722: {Peripheral sealing arrangements, e.g. adhesives, sealants}
- H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers}
- H10K 59/1201: {Manufacture or treatment}
- H10K 2102/00: Constructional details relating to the organic devices covered by this subclass
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

According to one embodiment, an organic semiconductor device includes a supporting substrate, a plurality of organic EL light emitting elements, a first barrier layer, a flattening layer, and a second barrier layer. The flattening layer exists sporadically and makes gentle in inclination steep elevation change present in the surface of the first barrier layer. The first barrier layer and the second barrier layer are made of moisture penetration preventive material.

## Claims

### Claim 1

An organic electroluminescent display device comprising:
a substrate;
a plurality of pixels arranged in a display area on the substrate;
a peripheral area surrounding the display area on the substrate;
a thin film transistor arranged in each of the pixels;
a passivation layer covering the thin film transistor;
an anode connected to the thin film transistor and arranged on the passivation layer;
an electric non-conductance layer formed on edges of the anode and surrounding the anode;
an organic layer configured to emit light and formed on the anode;
a cathode covering the organic layer;
a first inorganic layer covering the cathode;
a resin layer arranged on the first inorganic layer; and
a second inorganic layer covering the resin layer,
wherein
the resin layer has a first end and a second end in a part of peripheral area, and
the first inorganic layer is directly in contact with the second inorganic layer at both the first end and the second end in the part of the peripheral area.

### Claim 2 (depends on 1)

The organic electroluminescent display device according to claim 1, wherein a shape of the anode is a rectangle.

### Claim 3 (depends on 1)

The organic electroluminescent display device according to claim 1, further comprising:
a wall structure formed between the passivation layer and the first inorganic layer,
wherein the resin layer is arranged on a sloped surface of the first inorganic layer formed by the wall structure.

### Claim 4 (depends on 3)

The organic electroluminescent display device according to claim 3, wherein a thickness of the wall structure is smaller than a total thickness of the anode, the organic layer, the cathode, and the first inorganic layer.

### Claim 5 (depends on 4)

The organic electroluminescent display device according to claim 4, wherein the resin layer partially covers the sloped surface and partially covers a flat surface of the first inorganic layer.