Method of manufacturing device having flexible substrate and device having flexible substrate manufactured using the same

• US 20070105252A1
• Filed: 10/31/2006
• Published: 05/10/2007
• Est. Priority Date: 11/01/2005
• Status: Active Grant

• Current Assignee: LG Display Co., Ltd.
• Original Assignee: LG Chem Limited (LG Corporation)
• Inventors: Lee, Young, Noh, Jeoung, Lee, Jae
• Granted Patent: US 7,547,564 B2
• Time in Patent Office: Days
• US Class Current: 438/26
• CPC Class Codes: H10K 2102/311 Flexible OLED
• CPC Class Codes: H10K 50/844 Encapsulations
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/80 using temporary substrates

Abstract

The present invention relates to a method of manufacturing a device having a flexible substrate and a device having a flexible substrate manufactured using the method. According to the method of manufacturing a device having a flexible substrate of the invention, glass is used as a mother substrate, a polymer layer, which is used as a substrate, is formed on the mother substrate using a chemical vapor deposition method or a vacuum evaporation method, a device is formed, and finally, the substrate where the device is formed is separated from the mother substrate, such that a large-scale device having a flexible substrate can be manufactured. Further, as a substrate forming an organic light emitting device and a sealant are formed of the same material, the device is not bent due to stress generated from the device itself after the device is manufactured.

Claims

1. A method of manufacturing a device having a flexible substrate, comprising the steps of:

1) forming a first polymer layer on a mother substrate using a chemical vapor deposition method or a vacuum evaporation method;

2) forming a device, which is selected from a group consisting of an optical device, an electronic device, and a combination of the optical device and the electronic device, on the first polymer layer;

3) forming a second polymer layer on the device using the chemical vapor deposition method or the vacuum evaporation method; and

4) cutting the first polymer layer and the second polymer layer along an outer edge of the device and separating the device having a structure, in which the first polymer layer, the device, and the second polymer layer are sequentially laminated, from the mother substrate.

2. The method as set forth in claim 1, wherein, in the step 1), the mother substrate includes one selected from a group consisting of a glass substrate, a metal plate, and ceramic.

3. The method as set forth in claim 1, wherein, in the step 1), the first polymer layer is deposited over the entire surface of the mother substrate.

4. The method as set forth in claim 1, wherein the device formed in the step 2) is selected from a group consisting of an organic light emitting device, an organic/inorganic thin film transistor, a silicon thin film transistor, and liquid crystal.

5. The method as set forth in claim 1, wherein a polymer of the first polymer layer and a polymer of the second polymer layer are the same, and are selected among parylene N, C, and D.

6. The method as set forth in claim 1, wherein the first polymer layer and the second polymer layer have a thickness of 5 to 1,000 μ

m.

7. The method as set forth in claim 1, further comprising:

after the cutting of the first polymer layer and the second polymer layer along the outer edge of the device in the step 4), applying an adhesive to the second polymer layer inside the cut region and attaching a flexible polymer film or a metal film, before the separating of the device having the structure, in which the first polymer layer, the device, and the second polymer layer are sequentially laminated, from the mother substrate.

8. The method as set forth in claim 7, further comprising:

applying an adhesive to the opposite side of the device, where the first polymer layer is laminated, and attaching a flexible polymer film or a metal film after the device is separated from the mother substrate.

9. A device manufactured by the method as set forth in claim 1.

10. The device as set forth in claim 9, wherein the device is selected from a group consisting of an organic light emitting device, an organic/inorganic thin film transistor, a silicon thin film transistor, and liquid crystal.