# US 10,319,943 B2 · Display device

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- Number: US 10,319,943 B2
- Document ID: US10319943B2
- Status: Granted
- Kind: B2
- Application number: 15/823,659
- Filed: 2017-11-28
- Published: 2018-03-22
- Granted: 2019-06-11
- Earliest claimed: 2015-03-18
- Assignees: Japan Display Inc.
- Applicants: Japan Display Inc.
- Inventors: Kazufumi Watabe; Hiroshi Kawanago
- Web page: https://patentgrep.com/patent/US10319943B2

## CPC

- H10K 71/162: {using laser ablation}
- H10K 59/871: {Self-supporting sealing arrangements}
- H10K 59/873: {Encapsulations}
- H10K 71/221: {by lift-off techniques}
- H10K 59/1201: {Manufacture or treatment}
- H10K 59/38: comprising colour filters or colour changing media [CCM]
- H10K 71/80: using temporary substrates
- H10K 71/861: {Repairing}
- H10K 2102/311: {Flexible OLED}
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES

## Abstract

A structure including a first resin layer and a second resin layer sandwiching a self-light emitting element layer, a first stopper layer, a first resin sacrificial layer and a first glass substrate which are stacked on the first resin layer on the opposite side of the self-light emitting element layer, and a second glass substrate stacked on the second resin layer is prepared. The first glass substrate is peeled off from the first resin sacrificial layer by irradiating the first glass substrate with a laser beam. The first resin sacrificial layer is decomposed by a chemical reaction using a gas. The first stopper layer has a resistance to the chemical reaction, and the first resin sacrificial layer is removed while leaving the first stopper layer in a step of decomposing the first resin sacrificial layer.

## Claims

### Claim 1

A display device comprising:
a first resin layer;
a first inorganic material on the first resin layer;
a second inorganic material on the first inorganic material;
a first flexible substrate on the second inorganic material;
a function layer which is arranged on the first flexible substrate and includes a plurality of pixels arranged in a matrix, each of the plurality of pixels including a thin film transistor and an organic emitting element connected to the thin film transistor; and
a second flexible substrate on the function layer, wherein
in plan view, each of the first resin layer, the first inorganic material, the second inorganic material, the first flexible substrate, and the second flexible substrate covers the plurality of pixels,
the first inorganic material differs from the second inorganic material,
an upper surface of the first inorganic material is in contact with the second inorganic material, and
an upper surface of the second inorganic material is in contact with the first flexible substrate.

### Claim 2 (depends on 1)

The display device according to claim 1, further comprising:
a sealing film which includes a first region having a first width and a second region having a second width; and
a filler including a resin material, wherein
the sealing film is arranged between the function layer and the second flexible substrate,
the filler is arranged between the sealing film and the second flexible substrate,
the organic light emitting element includes an anode; an organic light emitting layer on the anode; and a cathode on the organic light emitting layer,
the function layer includes an insulation bank which is between the anode and the organic light emitting layer, covers a peripheral region of an upper surface of the anode, and expose a central region of the upper surface of the anode, and
the first width directly above the peripheral region is smaller than the second width directly above the central region.

### Claim 3 (depends on 1)

The display device according to claim 1,
wherein the second inorganic material has a first pinhole penetrating the second inorganic material,
a part of the first inorganic material buries the first pinhole.

### Claim 4 (depends on 1)

The display device according to claim 1,
wherein the first inorganic material is an ALD layer.

### Claim 5 (depends on 4)

The display device according to claim 4,
wherein the second inorganic material is a CVD layer.

### Claim 6 (depends on 1)

The display device according to claim 1,
wherein the first inorganic material includes Al2O3.

### Claim 7 (depends on 6)

The display device according to claim 6,
wherein the second inorganic material includes SiO or SiN.

### Claim 8 (depends on 1)

The display device according to claim 1,
wherein the first resin layer includes PET.