Method for manufacturing flexible display device and flexible display device so manufactured

Patent metadata

Field	Value
Publication number	US-9847500-B2
Application number	US-201514888453-A
Country	US
Kind code	B2
Filing date	Oct 26, 2015
Priority date	Oct 10, 2015
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

The present invention provides a method for manufacturing a flexible display device and a flexible display device so manufactured. The method for manufacturing a flexible display device according to the present invention uses a connection layer to replace a release layer and a bonding layer that are commonly used in the prior art so as to enhance the bonding strength between a flexible backing plate and a rigid carrier board and to additionally function as a release layer for easily achieving separation between the flexible backing plate and the rigid carrier board; and further, a thermal isolation layer is provided on one side or two sides of the soft glass plate to isolate heat generated in a high temperature process, an ELA process, or a laser based separation process and thus reduce thermal impact caused the heat on the soft glass plate and the display device so as to prevent cracking resulting from increase of brittleness of the soft glass plate and enhance performance of a flexible display device.

First claim

What is claimed is:

1. A method for manufacturing a flexible display device, comprising the following steps:
(1) providing a carrier board and depositing a connection layer on the carrier board by plasma enhanced chemical vapor deposition (PECVD);
(2) forming a flexible base plate on the connection layer, wherein the flexible base plate comprises a soft glass plate and a thermal isolation layer that is provided on at least one side of the soft glass plate;
(3) forming a blocking layer on the flexible base plate;
(4) forming a display structure unit and a package structure unit that is arranged on the display structure unit on the blocking layer; and
(5) applying a laser based process to separate the carrier board and the flexible base plate with the connection layer attached to the flexible base plate so as to obtain a flexible display device, wherein the flexible display device comprises the flexible base plate, the connection layer that is on a lower surface of the flexible base plate, a blocking layer that is on an upper surface of the flexible base plate, the display structure unit on the blocking layer, and the package structure unit on the display structure unit;
wherein the thermal isolation layer is arranged on a side of the soft glass plate that is close to the connection layer.

2. The method for manufacturing the flexible display device as claimed in claim 1 , wherein the flexible base plate comprises an additional thermal isolation layer arranged on a side of the soft glass plate that is close to the blocking layer.

3. The method for manufacturing the flexible display device as claimed in claim 1 , wherein the connection layer comprises a SiO 2 layer or a SiN x layer; the thermal isolation layer is formed of a temperature-resistant insulating thermally-isolating material; and the blocking layer comprises one of a SiO 2 layer, a SiN x layer, and a composite layer formed by alternately stacking a SiO 2 layer and a SiN x layer.

4. A flexible display device, comprising a flexible base plate, a connection layer arranged on a lower surface of the flexible base plate, a blocking layer arranged on the flexible base plate, a display structure unit arranged on the blocking layer, and a package structure unit arranged on the display structure unit;
wherein the flexible base plate comprises a soft glass plate and a thermal isolation layer that is provided on at least one side of the soft glass plate; and
wherein the thermal isolation layer is arranged on a side of the soft glass plate that is close to the connection layer.

5. The flexible display device as claimed in claim 4 , wherein the flexible base plate comprises an additional thermal isolation layer arranged on a side of the soft glass plate that is close to the blocking layer.

6. The flexible display device as claimed in claim 4 , wherein the connection layer comprises a SiO 2 layer or a SiN x layer; the thermal isolation layer is formed of a temperature-resistant insulating thermally-isolating material; and the blocking layer comprises one of a SiO 2 layer, a SiN x layer, and a composite layer formed by alternately stacking a SiO 2 layer and a SiN x layer.

7. The flexible display device as claimed in claim 6 , wherein the temperature-resistant insulating thermally-isolating material comprises zirconium dioxide.

8. A flexible display device, comprising a flexible base plate, a connection layer arranged on a lower surface of the flexible base plate, a blocking layer arranged on the flexible base plate, a display structure unit arranged on the blocking layer, and a package structure unit arranged on the display structure unit;
wherein the flexible base plate comprises a soft glass plate and a thermal isolation layer that is provided on at least one side of the soft glass plate;
wherein the thermal isolation layer is arranged on a side of the soft glass plate that is close to the connection layer;
wherein the flexible base plate comprises an additional thermal isolation layer arranged on a side of the soft glass plate that is close to the blocking layer; and
wherein the connection layer comprises a SiO 2 layer or a SiN x layer; the thermal isolation layer is formed of a temperature-resistant insulating thermally-isolating material; and the blocking layer comprises one of a SiO 2 layer, a SiN x layer, and a composite layer formed by alternately stacking a SiO 2 layer and a SiN x layer.

9. The flexible display device as claimed in claim 8 , wherein the connection layer comprises a SiO 2 layer or a SiN x layer.

10. The flexible display device as claimed in claim 8 , wherein the thermal isolation layer is formed of a temperature-resistant insulating thermally-isolating material.

11. The flexible display device as claimed in claim 10 , wherein the temperature-resistant insulating thermally-isolating material comprises zirconium dioxide.

12. The flexible display device as claimed in claim 8 , wherein the blocking layer comprises one of a SiO 2 layer, a SiN x layer, and a composite layer formed by alternately stacking a SiO 2 layer and a SiN x layer.

Assignees

• Shenzhen China Star Optoelect
• Wuhan China Star Optoelectronics Technology Co Ltd

Inventors

• Yu Yun
• Zheng Qipei

Classifications

• H01L2251/5338

  Electricity · mapped topic

• H01L51/003

  Electricity · mapped topic

• H01L51/56

  Electricity · mapped topic

• H01L51/0097 Primary

  Electricity · mapped topic

• H10K77/111

  Flexible substrates · CPC title