Organic EL display device and organic EL display device manufacturing method

• US 10,516,134 B2
• Filed: 09/30/2016
• Issued: 12/24/2019
• Est. Priority Date: 09/30/2016
• Status: Active Grant

• Current Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: Sharp Kabushiki Kaisha (Hon Hai Precision Industry Co., Ltd.)
• Inventors: Ochi, Hisao, Ochi, Takashi, Sonoda, Tohru, Senoo, Tohru, Hirase, Takeshi, Matsui, Akihiro, Takahashi, Jumpei
• Primary Examiner(s): Nikmanesh, Seahvosh
• Application Number:
  US16/062,641
• Publication Number:
  US 20190341576A1
• Time in Patent Office: 1,180 Days
• CPC Class Codes: H01L 27/1248 with a particular composition or shape of the interlayer dielectric specially adapted to the circuit arrangement
• CPC Class Codes: H01L 27/1288 employing particular masking sequences or specially adapted masks, e.g. half-tone mask
• CPC Class Codes: H05B 33/04 Sealing arrangements , e.g. against humidity
• CPC Class Codes: H05B 33/12 Light sources with substantially two-dimensional radiating surfaces
• CPC Class Codes: H05B 33/22 characterised by the chemical or physical composition or the arrangement of auxiliary dielectric or reflective layers
• CPC Class Codes: H10K 50/8426 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 59/12 Active-matrix OLED [AMOLED] displays
• 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 59/8722 Peripheral sealing arrangements, e.g. adhesives, sealants
• CPC Class Codes: H10K 71/00 Manufacture or treatment specially adapted for the organic devices covered by this subclass
• CPC Class Codes: H10K 71/135 using ink-jet printing
• CPC Class Codes: H10K 71/233 by photolithographic etching

Abstract

In an organic EL display device, a taper angle of a separation layer surrounding edges of an organic EL layer disposed in each pixel and being disposed between adjacent pixels is different from a taper angle of a frame-shaped bank surrounding edges of an organic layer. As a result, qualities required for layers surrounded by the separation layer and the frame-shaped bank respectively are satisfied.

Claims

1. A method of manufacturing an organic EL display device with pixels disposed in a matrix form in a display region, the method comprising:

forming a separation layer surrounding edges of an organic EL layer disposed in each pixel and being disposed between adjacent pixels; and

forming a frame-shaped bank covering a periphery of the display region and surrounding edges of a resin layer sealing the organic EL layer,

wherein in the forming a frame-shaped bank, a taper angle of the frame-shaped bank is different from a taper angle of the separation layer,

the forming a separation layer and the forming a frame-shaped bank are performed in a same manufacturing process step,

in the forming a separation layer and the forming a frame-shaped bank, the separation layer and the frame-shaped bank are formed by patterning and forming with use of a mask a film including a photosensitive material,

slit-like openings are provided in a formation region for forming the separation layer and in a formation region for forming the frame-shaped bank in the mask, and

values of D/L are different in the region for forming the separation layer and the region for forming the frame-shaped bank,

where L represents a width of each of the openings in the region for forming the separation layer and in the region for forming the frame-shaped bank, and D represents a width of a light blocking portion between the openings.

2. The method of manufacturing an organic EL display device according to claim 1,

wherein in the forming a frame-shaped bank, the taper angle of the frame-shaped bank is larger than the taper angle of the separation layer.

3. The method of manufacturing an organic EL display device according to claim 1,

wherein in the forming a frame-shaped bank, the taper angle of the frame-shaped bank is smaller than the taper angle of the separation layer.

4. The method of manufacturing an organic EL display device according to claim 1,

wherein a height of the frame-shaped bank is larger than a height of the separation layer.

5. The method of manufacturing an organic EL display device according to claim 1,

wherein a height of the separation layer is larger than a height of the frame-shaped bank.

6. The method of manufacturing an organic EL display device according to claim 1,

wherein the frame-shaped bank includes a first frame-shaped bank disposed on an inner side, and a second frame-shaped bank surrounding a periphery of the first frame-shaped bank and having a taper angle different from a taper angle of the first frame-shaped bank.

7. The method of manufacturing an organic EL display device according to claim 2,

wherein a height of the frame-shaped bank is larger than a height of the separation layer.

8. The method of manufacturing an organic EL display device according to claim 2,

wherein a height of the separation layer is larger than a height of the frame-shaped bank.

9. The method of manufacturing an organic EL display device according to claim 2,

wherein the frame-shaped bank includes a first frame-shaped bank disposed on an inner side, and a second frame-shaped bank surrounding a periphery of the first frame-shaped bank and having a taper angle different from a taper angle of the first frame-shaped bank.

10. The method of manufacturing an organic EL display device according to claim 3,

wherein a height of the frame-shaped bank is larger than a height of the separation layer.

11. The method of manufacturing an organic EL display device according to claim 3,

wherein a height of the separation layer is larger than a height of the frame-shaped bank.

12. The method of manufacturing an organic EL display device according to claim 3,

wherein the frame-shaped bank includes a first frame-shaped bank disposed on an inner side, and a second frame-shaped bank surrounding a periphery of the first frame-shaped bank

and having a taper angle different from a taper angle of the first frame-shaped bank.