# US 10,319,947 B2 · OLED with a flattening layer between two barrier layers

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- Number: US 10,319,947 B2
- Document ID: US10319947B2
- Status: Granted
- Kind: B2
- Application number: 15/726,028
- Filed: 2017-10-05
- Published: 2018-02-15
- Granted: 2019-06-11
- Earliest claimed: 2013-02-12
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Daisuke Kato; Kaichi Fukuda
- Web page: https://patentgrep.com/patent/US10319947B2

## 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 comprising an active area in which a plurality of organic electroluminescent light emitting elements are disposed, and an outside area surrounding the active area;
a resin layer on the substrate;
a first inorganic insulating layer on the resin layer;
a second inorganic insulating layer on the first inorganic insulating layer; and
an organic material between the first inorganic insulating layer and the second inorganic insulating layer,
wherein
in the outside area,
the first inorganic insulating layer comprises a first flat surface and an inclined surface extending from the first flat surface,
the organic material is formed to be in contact with a first portion of the first flat surface and a first portion of the inclined surface, and
the second inorganic insulating layer is in contact with each of a second portion of the first flat surface and a second portion of the inclined surface.

### Claim 2 (depends on 1)

The display device according to claim 1, wherein
the resin layer comprises a concave portion or a convex portion, and
the inclined surface overlaps with an edge of the concave portion or an edge of the convex portion.

### Claim 3 (depends on 1)

The display device according to claim 1, wherein
the organic material is disposed between the second portion of the first flat surface and the second portion of the inclined surface.

### Claim 4 (depends on 1)

The display device according to claim 1, wherein
the first inorganic insulating layer further comprises a second flat surface extending from the inclined surface, and
the second inorganic insulating layer is in contact with the second flat surface.

### Claim 5 (depends on 4)

The display device according to claim 4, wherein
a distance between the second flat surface and the substrate is larger than a distance between the first flat surface and the substrate.

### Claim 6 (depends on 1)

The display device according to claim 1, wherein
each of the first inorganic insulating layer and the second inorganic insulating layer extends from the active area to the outside area continuously.

### Claim 7 (depends on 1)

The display device according to claim 1, wherein
an interface between the organic material and the second inorganic insulating layer has a curved shape in a cross sectional view.