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Method for inhibiting formation of coffee ring in printing process and solid thin film

A coffee ring and process technology, applied in the post-processing, printing and other directions of printing, can solve the problems of roughness, loose film layer, unfavorable process and so on

Active Publication Date: 2017-04-26
深圳市TCL高新技术开发有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above deficiencies in the prior art, the purpose of the present invention is to provide a method and a solid film that can suppress the formation of coffee rings in the printing process, aiming to solve the problem that the film layer formed by the existing printing process is loose and rough, which is not conducive to subsequent processes and The problem of maintaining device performance

Method used

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  • Method for inhibiting formation of coffee ring in printing process and solid thin film
  • Method for inhibiting formation of coffee ring in printing process and solid thin film
  • Method for inhibiting formation of coffee ring in printing process and solid thin film

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specific example

[0036] A specific example is as follows:

[0037] Functional ink composition: by mass ratio, including 0.6% P-PPV and 94.4% solvent, wherein the solvent composition is as follows: chlorobenzene and 3,4-dimethylanisole, and the volume ratio of the two is: chlorobenzene and 3,4-Dimethylanisole=80:20. The preparation process is as follows:

[0038] 1. Use printing process to deposit functional ink in the pixel pit of the substrate to form ink liquid film;

[0039] 2. Lower the temperature to -50°C (the melting point of chlorobenzene is -45°C) to solidify the ink liquid film and form a solid ink film;

[0040] 3. Put the cured ink solid film under vacuum, the vacuum degree is 10Pa, sublimation removes 70% (by volume) of chlorobenzene;

[0041] 4. Return the ink solid film to room temperature to form a semi-cured ink film layer;

[0042] 5. Vacuum the semi-cured ink film layer to remove the remaining solvent and form a dense solid film.

[0043] In summary, the present inventi...

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Abstract

The invention discloses a method for inhibiting formation of a coffee ring in the printing process and a solid thin film. The method comprises the following steps: A, depositing a functional ink on a substrate by use of a printing technology to form an ink liquid film; B, reducing the temperature to enable the ink liquid film to be cured into an ink solid film; C, removing part of a solvent in the ink solid film through vacuum sublimation treatment; D, raising the temperature to room temperature, and enabling the residual solvent to redissolve solute so as to form a thick semi-cured ink film layer; and E, removing the residual solvent in the semi-cured ink film layer to form a solid thin film. After the liquid film is deposited by ink jet printing, the sublimation process is combined with the heating or vacuum process to remove the solvent, so that formation of the 'coffee ring' in the printing process is inhibited, meanwhile, an even and compact film layer structure is formed, follow-up progressing of the printing process is facilitated, the quality of the film layer prepared by the printing process is improved, and the performance of display devices is also improved finally.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a method capable of suppressing the formation of coffee rings in a printing process and a solid film. Background technique [0002] In the contemporary information society, the importance of the display as a visual information transmission medium is further strengthened. In order to occupy a dominant position in the future, the display is moving towards lighter, thinner, lower power consumption, lower cost and better image quality. trend development. [0003] Due to the advantages of self-luminescence, fast response, wide viewing angle, high brightness, and thinness, OLED has become a hot spot in the development of display technology. The manufacturing method of OLED mainly includes vacuum evaporation or wet preparation. Vacuum evaporation is limited by cost and size, and it is difficult to achieve large-scale mass production, while inkjet printing in wet preparation is consid...

Claims

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Application Information

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IPC IPC(8): B41M7/00C08J5/18C08L65/04
CPCB41M7/00B41M7/009C08J5/18C08J2365/04
Inventor 陈亚文
Owner 深圳市TCL高新技术开发有限公司
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