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A linear pixel defining layer structure and its preparation method

A pixel-defining layer, pixel-defining technology, applied in semiconductor/solid-state device manufacturing, semiconductor devices, electrical components, etc., can solve problems such as low material utilization rate and complex preparation process

Active Publication Date: 2019-01-25
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In the prior art, the pixel defining layer is composed of two layers, the first layer (lower layer) is composed of a lyophilic material, and the second layer (upper layer) is composed of a lyophobic material, which are generally prepared by photolithography, and the preparation process is complicated , low material utilization

Method used

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  • A linear pixel defining layer structure and its preparation method
  • A linear pixel defining layer structure and its preparation method
  • A linear pixel defining layer structure and its preparation method

Examples

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Embodiment 1

[0029] A method for preparing a linear pixel-defining layer structure is carried out through the following steps:

[0030] A. Deposit a lyophobic insulating layer on the surface of the substrate. In step A, the insulating layer is deposited by spin coating method, and the material of the insulating layer is cytop. The substrate can be ITO or glass or polymer film or other substrates.

[0031] B. Print a solvent that can dissolve the insulating layer on the surface of the insulating layer. The printed solvent makes the dissolved insulating layer accumulate due to the coffee ring effect to form a pixel wall, and the pixel wall encloses the corresponding pixel limited area. figure 1 It is a schematic diagram of the printed similar structure, the pixel structure is U-shaped, the pixel limited areas 1 and 2 have very little insulating material residue, and 3 is the formed pixel wall.

[0032] Specifically, the inkjet printing method can be used to print the solvent. By adjusting ...

Embodiment 2

[0038] A method for preparing a linear pixel defining layer structure, other features are the same as in Embodiment 1, the difference is that the heat treatment temperature in step D in this embodiment is 190 to 350 degrees Celsius, and the heat treatment time is 6 to 20 minutes. It has been found in practice that the linear pixel defining layer structure prepared by this heat treatment has better performance.

Embodiment 3

[0040] A method for preparing a linear pixel defining layer structure, other features are the same as in Embodiment 1, the difference is that the heat treatment temperature in step D in this embodiment is 200 to 300 degrees Celsius, and the heat treatment time is 6 to 10 minutes. The preparation effect of this process is better.

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Abstract

A method for preparing a linear pixel defining layer structure, comprising the following steps: A. depositing a lyophobic insulating layer on the surface of a substrate; B. printing a solvent capable of dissolving the insulating layer on the surface of the insulating layer to form a pixel wall and a pixel defining area; C. Carry out oxygen ion bombardment treatment to remove the residual insulating layer in the pixel limited area. At this time, the overall structure is in a lyophilic state; D. Perform heat treatment to restore the liquid repellency of the insulating material in the structure, and the pixel limited area remains hydrophilic. liquid state. In the present invention, the pixel defining layer is obtained by printing solvent on the surface of the insulating layer. The pixel defining area has lyophilicity, which is beneficial to the spreading of the solution. The pixel wall is lyophobic, which can prevent the solution from overflowing. The specific solvent can prevent the light emitting layer solution from corroding the pixel defining layer. The invention has the characteristics of simple preparation process and high material utilization rate.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a linear pixel defining layer structure and a preparation method thereof. Background technique [0002] Organic light emitting diode OLED (Organic light emitting diode) is an organic thin film electroluminescent device, in order to perform color display, OLED needs to be colored. Colorization works best side-by-side. Arranged side by side, there are three sub-pixels of red, green and blue within a pixel range, and each pixel is an independent light-emitting unit. The solution can be precisely printed into the pixel area by inkjet printing to form the light-emitting layer. However, since the droplets formed by printing are of the same size order as the pixel structure, in order to ensure the accuracy of printing and prevent the solution from overflowing to adjacent pixel structures, the current tendency is to use a pixel definition layer. [0003] In the prior art, the p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01L27/32H01L51/56
CPCH10K59/122H10K71/00
Inventor 王坚王娟红刘会敏彭俊彪曹镛宋晨郑华
Owner SOUTH CHINA UNIV OF TECH
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