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An organic light-emitting display backplane, its manufacturing method and display device

A light-emitting display, organic light-emitting layer technology, applied in the manufacture/processing of organic semiconductor devices, semiconductor/solid-state device manufacturing, semiconductor devices, etc., can solve problems such as large IRDrop, reduce sheet resistance, avoid process difficulties, and reduce The effect of voltage drop

Active Publication Date: 2022-07-12
BOE TECH GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Embodiments of the present invention provide an organic light-emitting display backplane, a manufacturing method thereof, and a display device to solve the problem in the prior art that organic light-emitting display backplanes with a top-emission structure tend to generate relatively large IR drops.

Method used

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  • An organic light-emitting display backplane, its manufacturing method and display device
  • An organic light-emitting display backplane, its manufacturing method and display device
  • An organic light-emitting display backplane, its manufacturing method and display device

Examples

Experimental program
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Effect test

Embodiment 1

[0088] Example 1: figure 1 The steps of the manufacturing method of the organic light-emitting display backplane shown are as follows:

[0089] (1) A planarization layer 9, an anode 2 and an inorganic insulating film 02 are sequentially formed on the base substrate 1 on which the thin film transistor (not shown) is formed, such as Figure 10A shown.

[0090] (2) The pixel defining layer 8 is formed on the inorganic insulating film 02, such as Figure 10B shown.

[0091] (3) Two layers of conductive films 03 and 04 are continuously deposited on the pixel defining layer 8, the material of the conductive film 03 is Mo, and the material of the conductive film 04 can be Al / Nd, such as Figure 10C shown.

[0092] (4) Apply photoresist 05 on the conductive film 04, such as Figure 10D shown.

[0093] (5) Select an etchant capable of etching Al / Nd to etch the conductive film 04 to form the pattern of the second auxiliary cathode 42, such as Figure 10E shown.

[0094] (6) Usin...

Embodiment 2

[0101] Embodiment 2: figure 2 The steps of the manufacturing method of the organic light-emitting display backplane shown are as follows:

[0102] (1) A planarization layer 9, a conductive thin film 03 and a conductive thin film 04 are sequentially formed on the base substrate 1 on which the thin film transistor (not shown) is formed. For example, the material of the conductive thin film 03 is Mo / Al / Nd (or Mo / Al), the material of the conductive film 04 is ITO, such as Figure 11A shown.

[0103] (2) Coat photoresist 05 on the conductive film 04 corresponding to the subsequently formed anode region and auxiliary cathode structure region, such as Figure 11B shown.

[0104] (3) Select the etching solution to etch the conductive film 04, form the pattern of the anode 2 in the pixel area, and simultaneously form the pattern of the second auxiliary cathode 42 in the non-pixel area, such as Figure 11C shown.

[0105] (4) Using the pattern of the anode 2 and the second auxili...

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Abstract

The invention discloses an organic light-emitting display backplane, a manufacturing method thereof and a display device. In the present invention, by arranging an auxiliary cathode structure in a non-pixel area of ​​the organic light-emitting display backplane, when an organic light-emitting layer is formed, the organic light-emitting layer can be The adjacent pixel areas are automatically disconnected, so that an organic light-emitting layer is formed in the pixel area, and an organic material structure is formed in the non-pixel area; when the cathode is formed, the cathode is electrically connected to the auxiliary cathode structure, which can reduce the sheet resistance of the cathode, thereby reducing the The problem of uneven brightness caused by voltage drop. In addition, in the present invention, the auxiliary cathode structure is arranged in the non-pixel area of ​​the display backplane, which does not occupy the aperture ratio of the pixel area, and can avoid the difficult and relatively costly process of forming auxiliary cathodes on the color filter cover in the prior art. It is relatively high, and it is easy to crush the transparent cathode during pressing, resulting in defects such as black spots.

Description

technical field [0001] The present invention relates to the field of display technology, and in particular, to an organic light-emitting display backplane, a manufacturing method thereof, and a display device. Background technique [0002] Among the flat panel display panels, organic light emitting diode (Organic Light Emitting Display, OLED) display panels have received extensive attention due to their advantages of self-luminescence, fast response, wide viewing angle, high brightness, bright colors, and thinness. In the production of large-size OLED screens, it is difficult to achieve higher resolution due to the influence of the aperture ratio of bottom-emission OLED devices. Therefore, more and more manufacturers develop top-emission OLED devices to achieve higher resolution. . [0003] For large-size top-emission OLED devices, the OLED cathode on the backplane usually uses a transparent conductive oxide such as IZO, which has poorer conductivity than metals, especially...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32H01L51/52H01L51/56
CPCH10K59/122H10K50/81H10K50/824H10K71/00
Inventor 宋振王国英刘凤娟
Owner BOE TECH GRP CO LTD