# US 9,520,450 B2 · Flexible display apparatus and method of manufacturing the same

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- Number: US 9,520,450 B2
- Document ID: US9520450B2
- Status: Granted
- Kind: B2
- Application number: 14/709,723
- Filed: 2015-05-12
- Published: 2016-03-17
- Granted: 2016-12-13
- Earliest claimed: 2014-09-16
- Assignees: Samsung Display Co., Ltd.
- Applicants: Samsung Display Co., Ltd.
- Inventors: Youngji Kim; Sohra Han
- Web page: https://patentgrep.com/patent/US9520450B2

## CPC

- H10K 71/70: Testing, e.g. accelerated lifetime tests
- H10K 59/35: comprising red-green-blue [RGB] subpixels
- H10K 77/111: {Flexible substrates}
- H10K 59/12: Active-matrix OLED [AMOLED] displays
- H10K 71/861: {Repairing}
- 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 apparatus and a flexible display apparatus, the method including preparing a flexible substrate such that the flexible substrate includes a display area and a peripheral area at an outer portion of the display area; forming an inorganic layer portion on the display area and the peripheral area of the flexible substrate; forming a plurality of organic light emitting devices on the display area of the flexible substrate; detecting a crack of the inorganic layer portion formed on the peripheral area of the flexible substrate; and forming a crack guide hole around the crack.

## Claims

### Claim 1

A method of manufacturing a flexible display apparatus, the method comprising:
preparing a flexible substrate such that the flexible substrate includes a display area and a peripheral area at an outer portion of the display area;
forming an inorganic layer portion on the display area and the peripheral area of the flexible substrate;
forming a plurality of organic light emitting devices on the display area of the flexible substrate;
detecting a crack of the inorganic layer portion formed on the peripheral area of the flexible substrate; and
forming a crack guide hole around the crack.

### Claim 2 (depends on 1)

The method as claimed in claim 1, wherein forming the crack guide hole includes forming a crack guide hole in the inorganic layer portion by laser drilling.

### Claim 3 (depends on 2)

The method as claimed in claim 2, wherein forming the crack guide hole includes forming a crack guide hole in a propagation path of the crack.

### Claim 4 (depends on 3)

The method as claimed in claim 3, wherein forming the crack guide hole includes forming a crack guide hole on the peripheral area of the flexible substrate between an end of the crack and the display area of the flexible substrate.

### Claim 5 (depends on 2)

The method as claimed in claim 2, wherein forming the crack guide hole includes forming a crack guide hole in a path different from a propagation path of the crack.

### Claim 6 (depends on 5)

The method as claimed in claim 5, wherein forming the crack guide hole includes sequentially forming a plurality of crack guide holes in a direction towards an edge of the flexible substrate.

### Claim 7 (depends on 2)

The method as claimed in claim 2, wherein forming the crack guide hole includes forming:
a first crack guide hole and a second crack guide hole in the peripheral area of the flexible substrate between an end of the crack and the display area of the flexible substrate, and
a crack stopping line connecting the first and second crack guide holes by a shortest distance therebetween.

### Claim 8 (depends on 7)

The method as claimed in claim 7, wherein forming the first and second crack guide holes includes spacing the first and second crack guide holes apart from an end portion of the display area by the same distance.

### Claim 9 (depends on 8)

The method as claimed in claim 8, wherein forming the crack stopping line includes using a laser to form a groove that connects the first and second crack guide holes in the inorganic layer portion on the peripheral area of the flexible substrate.

### Claim 10 (depends on 9)

The method as claimed in claim 9, wherein forming the crack stopping line includes forming the crack stopping line parallel to an axis that is adjacent to the end portion of the display area.

### Claim 11 (depends on 1)

The method as claimed in claim 1, wherein detecting the crack includes detecting a crack generated in an edge portion of the inorganic layer portion on the peripheral area of the flexible substrate.

### Claim 12

A flexible display apparatus, comprising:
a flexible substrate, the flexible substrate including a display area and a peripheral area at an outer portion of the display area;
an inorganic layer portion on the display area and the peripheral area of the flexible substrate;
an organic light emitting device on the display area of the flexible substrate; and
a crack guide hole portion in the inorganic layer portion on the peripheral area of the flexible substrate.

### Claim 13 (depends on 12)

The flexible display apparatus as claimed in claim 12, wherein:
the crack guide hole portion includes a plurality of crack guide holes, and
the crack guide holes are sequentially disposed in a direction towards an edge of the flexible substrate.

### Claim 14 (depends on 12)

The flexible display apparatus as claimed in claim 12, wherein the crack guide hole portion includes a first crack guide hole, a second crack guide hole, and a crack stopping line connecting the first and second crack guide holes.

### Claim 15 (depends on 14)

The flexible display apparatus as claimed in claim 14, wherein the first crack guide hole and the second crack guide hole are spaced apart from an end portion of the display area by the same distance.

### Claim 16 (depends on 15)

The flexible display apparatus as claimed in claim 15, wherein the crack stopping line connects the first and second crack guide holes by a shortest distance therebetween.

### Claim 17 (depends on 16)

The flexible display apparatus as claimed in claim 16, wherein the crack stopping line is parallel to an axis that is adjacent to the end portion of the display area.