Matrix type display device and manufacturing method thereof

• US 8,431,182 B2
• Filed: 08/27/2008
• Issued: 04/30/2013
• Est. Priority Date: 09/19/1996
• Status: Expired due to Fees

• Current Assignee: Seiko Epson Corporation (Seiko Group)
• Original Assignee: Seiko Epson Corporation (Seiko Group)
• Inventors: Kimura, Mutsumi, Kiguchi, Hiroshi
• Primary Examiner(s): Lin, James
• Application Number:
  US12/230,308
• Publication Number:
  US 20090053396A1
• Time in Patent Office: 1,707 Days
• Field of Search: 427/64, 427/66, 427/74, 313504-506, 438/29
• US Class Current: 427/66
• CPC Class Codes: G02F 1/133377 Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel
• CPC Class Codes: G02F 1/1341 Filling or closing of cells
• CPC Class Codes: G02F 1/13613 the semiconductor element being formed on a first substrate and thereafter transferred to the final cell substrate
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: H10K 2102/351 Thickness
• CPC Class Codes: H10K 50/81 Anodes
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• CPC Class Codes: H10K 59/1201 Manufacture or treatment
• CPC Class Codes: H10K 59/122 Pixel-defining structures or layers, e.g. banks
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals
• CPC Class Codes: H10K 59/17 Passive-matrix OLED displays
• CPC Class Codes: H10K 59/173 comprising banks or shadow masks
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/13 using printing techniques, e.g. ink-jet printing or screen printing
• CPC Class Codes: H10K 71/50 Forming devices by joining two substrates together, e.g. lamination techniques

Abstract

An object of the invention is to improve patterning accuracy while maintaining low cost, high throughput and a high degree of freedom of an optical material in a matrix type display device and a manufacturing method thereof.

In order to achieve the object, a difference in height, a desired distribution of liquid repellency and affinity to liquid, or a desired potential distribution is formed by utilizing first bus lines in a passive matrix type display device or utilizing scanning lines, signal lines, common current supply lines, pixel electrodes, an interlevel insulation film, or a light shielding layer in an active matrix type display device. A liquid optical material is selectively coated at predetermined positions by utilizing the difference in height, the desired distribution of liquid repellency and affinity to liquid, or the desired potential distribution.

Claims

1. A method of manufacturing an electro-luminescent device, the method comprising the steps of:

providing a substrate, the substrate comprising;

a pixel electrode, the pixel electrode being lyophilic;

an insulator provided around the pixel electrode, a concave shape being formed, an inner wall of the concave shape being the insulator and a bottom of the concave shape being an exposed surface of the pixel electrode; and

a material formed on the insulator; and

applying a liquid that includes an optical material and a solvent over the pixel electrode in the concave shape, wherein the material has a surface with a higher liquid repellency to the liquid than a liquid repellency of surfaces of the insulator and the pixel electrode to the liquid.

2. A method of manufacturing an electro-luminescent device according to claim 1, wherein at least a part of the insulator partially covers a peripheral of the pixel electrode.

3. A method of manufacturing an electro-luminescent device according to claim 1, the liquid repellency being water repellency.

4. A method of manufacturing an electro-luminescent device according to claim 3, the pixel electrode being hydrophilic.

5. A method of manufacturing an electro-luminescent device according to claim 1, wherein the material is polyimide.

6. A method of manufacturing an electro-luminescent device according to claim 1, further comprising the step of, before applying the liquid, applying a liquid including a material to be a hole injection layer.

7. A method of manufacturing an electro-luminescent device according to claim 1, the material being selected from a group consisting of a metal, an anodic oxide, an insulation film of polyimide and silicon oxide.

8. A method of manufacturing an electro-luminescent device, the method comprising the steps of:

providing a substrate, the substrate comprising;

a pixel electrode, the pixel electrode being lyophilic;

an insulator provided around the pixel electrode, a concave shape being formed, an inner wall of the concave shape being the insulator and a bottom of the concave shape being an exposed surface of the pixel electrode; and

a material formed on the insulator;

applying a liquid that includes an optical material and a solvent over the pixel electrode in the concave shape by an ink-jet method; and

evaporating the solvent from the liquid, wherein the material has a surface with a higher liquid repellency to the solvent than a liquid repellency of surfaces of the insulator and the pixel electrode to the solvent.

9. A method of manufacturing an electro-luminescent device according to claim 8, wherein at least a part of the insulator partially covers a peripheral of the pixel electrode.

10. A method of manufacturing an electro-luminescent device according to claim 8, wherein the material is polyimide.

11. A method of manufacturing an electro-luminescent device according to claim 8, further comprising the step of, before applying the liquid, applying a liquid including a material to be a hole injection layer.

12. An electro-luminescent device, comprising:

a substrate, the substrate including;

a pixel electrode, the pixel electrode being lyophilic;

an insulator provided around the pixel electrode, a concave shape being formed, an inner wall of the concave shape being the insulator and a bottom of the concave shape being an exposed surface of the pixel electrode,

a material formed on the insulator; and

a liquid that includes an optical material and a solvent, the liquid being applied over the pixel electrode in the concave shape,

wherein the material has a surface with a higher liquid repellency to the liquid than a liquid repellency of surfaces of the insulator and the pixel electrode to the liquid.

13. An electro-luminescent device according to claim 12, wherein at least a part of the insulator partially covers a peripheral of the pixel electrode.

14. An electro-luminescent device according to claim 12, the liquid repellency being water repellency.

15. An electro-luminescent device according to claim 12, wherein the insulator is SiO2.

16. An electro-luminescent device according to claim 12, wherein the insulator is polyimide.