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Preparation method of trapezoidal pixel bank structure and oled device

A trapezoidal and pixel technology, which is applied in semiconductor/solid-state device manufacturing, semiconductor devices, electric solid-state devices, etc., can solve the problems of vertical pixel Bank structure, difficult surface hydrophilic and hydrophobic treatment, poor uniformity of device pixels, and reduced device aperture ratio. Achieve the effect of reducing lateral erosion, avoiding device open circuit, and improving uniformity

Active Publication Date: 2019-05-24
TCL CORPORATION
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Problems solved by technology

[0008] The purpose of the present invention is to provide a method for preparing a trapezoidal pixel Bank structure, aiming to solve the poor uniformity of device pixels caused by the trapezoidal pixel Bank structure produced by the existing vertical exposure method, and even lead to device open circuit, reduce the device aperture ratio, or vertical The pixel bank structure is difficult to carry out surface hydrophilic and hydrophobic treatment, which is not conducive to the problem of solution method for making OLED devices

Method used

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  • Preparation method of trapezoidal pixel bank structure and oled device
  • Preparation method of trapezoidal pixel bank structure and oled device
  • Preparation method of trapezoidal pixel bank structure and oled device

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[0035] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0036] combined with Figure 2-7 , the embodiment of the present invention provides a method for preparing a trapezoidal pixel Bank structure, comprising the following steps:

[0037] S01. Provide a TFT backplane, coat a layer of Bank material on the electrodes of the TFT backplane, and bake the Bank material to form a Bank layer with adhesion to the electrodes, wherein the Bank material is positive Bank material;

[0038] In the above step S01, in this embodiment, the TFT backplane includes a TFT array and electrodes sequentially stacked on a hard carrier substr...

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Abstract

The invention is applicable to the technical field of printing and display, and provides preparation methods of a trapezoidal pixel Bank structure and an OLED device respectively. The preparation method of the trapezoidal pixel Bank structure includes: providing a TFT backplane, preparing a Bank layer on the electrodes of the TFT backplane, and sequentially performing two exposure, development and etching treatments on the Bank layer to form an inverted trapezoid In the pixel area, a trapezoidal pixel Bank structure with a trapezoidal Bank is obtained. The preparation method of the trapezoidal pixel Bank structure provided by the present invention can effectively compensate the lateral erosion effect of the developing solution and the etching solution on the pixel Bank, and overcome the influence caused by the over-etching at the bottom of the Bank on the uniformity of the pixel of the device; meanwhile, adopt Exposure to the positive Bank material by first concentrating light and then scanning exposure can improve the pixel accuracy of the display device, thereby improving the resolution of the printed display device.

Description

technical field [0001] The invention belongs to the technical field of printing and display, and in particular relates to a trapezoidal pixel Bank structure and a preparation method of an OLED device. Background technique [0002] OLED display devices are considered to be the next-generation flat-panel display emerging application technology due to their advantages of self-illumination, no need for backlight, high contrast, thin thickness, wide viewing angle, fast response speed, and flexible panels. At present, for the preparation of OLED display devices, vacuum evaporation and printing technologies are usually used to prepare, which is the current international mainstream development technology. The vacuum evaporation technology of small molecules is relatively mature and has been industrialized at present, and small and medium-sized full-color display screens have been launched in batches, which are applied in the fields of electronic equipment such as MP3, MP4, mobile ph...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L21/77H01L27/32
CPCH01L21/77H10K59/121
Inventor 高卓
Owner TCL CORPORATION
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