# US 9,039,476 B2 · Method of manufacturing flexible display device

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- Number: US 9,039,476 B2
- Document ID: US9039476B2
- Status: Granted
- Kind: B2
- Application number: 13/974,000
- Filed: 2013-08-22
- Published: 2014-10-30
- Granted: 2015-05-26
- Earliest claimed: 2013-04-30
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., LTD.
- Inventors: Hyun-Jung Song; Dong-Un Jin
- Web page: https://patentgrep.com/patent/US9039476B2

## CPC

- H10K 71/80: using temporary substrates
- H10K 59/871: {Self-supporting sealing arrangements}
- H10K 59/8731: {multilayered coatings having a repetitive structure, e.g. having multiple organic-inorganic bilayers}
- H10K 77/111: {Flexible substrates}
- H10K 2102/311: {Flexible OLED}
- Y02E 10/549: Organic PV cells
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

A method of manufacturing a flexible display device includes: forming a soft substrate on a carrier substrate; forming a thin film layer comprising a display region on the soft substrate; removing a thin film layer excess portion of the thin film layer beyond an edge of the soft substrate; and separating the soft substrate and the carrier substrate.

## Claims

### Claim 1

A method of manufacturing a flexible display device, the method comprising:
forming a first soft substrate on a carrier substrate;
forming a barrier layer on the first soft substrate;
forming a second soft substrate on the barrier layer;
forming a thin film layer comprising a display region on the second soft substrate;
removing excess portions of the thin film layer, the barrier layer, and the second soft substrate beyond an edge of the first soft substrate when viewed in a plan view; and
separating the first soft substrate and the carrier substrate.

### Claim 2 (depends on 1)

The method of claim 1, wherein the removing comprises irradiating a laser onto and burning the excess portions.

### Claim 3 (depends on 2)

The method of claim 2, wherein, during the laser irradiating and burning, the excess portions around the edge of the first soft substrate is removed by irradiating the laser onto the edge of the soft substrate.

### Claim 4 (depends on 2)

The method of claim 2, wherein, during the laser irradiating and burning, the excess portions is entirely removed by irradiating the laser onto the excess portions.

### Claim 5 (depends on 2)

The method of claim 2, wherein the laser has a UV-Green wavelength band.

### Claim 6 (depends on 2)

The method of claim 2, wherein the laser is irradiated onto the excess portions through the carrier substrate.

### Claim 7 (depends on 2)

The method of claim 2, wherein the laser is irradiated onto the excess portions at an opposite side of the carrier substrate.

### Claim 8 (depends on 1)

The method of claim 1, wherein the soft substrate comprises a polyimide material, and the carrier substrate comprises a glass material.

### Claim 9

A system of manufacturing a flexible display device, the system comprising:
means for forming a first soft substrate on a carrier substrate;
means for forming a barrier layer on the first soft substrate;
means for forming a second soft substrate on the barrier layer;
means for forming a thin film layer comprising a display region on the second soft substrate;
means for removing excess portions of the thin film layer the barrier layer, and the second soft substrate beyond an edge of the first soft substrate when viewed in a plan view; and
means for separating the soft substrate and the carrier substrate.