Regeneration method of gas diffusion plate for large-generation liquid crystal screen production

Abstract

The invention discloses a regeneration method of a gas diffusion plate for large-generation liquid crystal screen production. The method comprises the following steps: firstly, detecting the flatness of the gas diffusion plate; carrying out shaping treatment on the gas diffusion plate; carrying out sand blasting treatment on the gas diffusion plate; then carrying out soaking and high-pressure cleaning on the gas diffusion plate; then carrying out water milling treatment, soaking and high-pressure cleaning on the gas diffusion plate; then carrying out sand blasting treatment and water milling treatment on the gas diffusion plate; then carrying out chemical cleaning, soaking and high-pressure cleaning on the gas diffusion plate; then carrying out oxidation treatment and high-pressure cleaning on the gas diffusion plate; then blow-drying the gas diffusion plate; and finally baking the gas diffusion plate. By optimizing the technological process, the probability of gathering and depositing foreign matters is effectively reduced, so that the service life of the gas diffusion plate is prolonged, and the phenomenon that the quality of a liquid crystal screen is affected due to the fact that the foreign matters fall onto a glass panel is avoided.

Description

technical field [0001] The invention relates to the technical field of production of large-generation liquid crystal screens, in particular to a method for regenerating a gas diffusion plate used in the production of large-generation liquid crystal screens. Background technique [0002] In the field of LCD screens, large-generation LCD screens refer to LCD screens with a size greater than 2200mm×2500mm. In the production process of this LCD screen, it is usually necessary to use chemical vapor deposition (CVD) to form a layer of insulation on the surface of the glass panel. film, the main component of this insulating film is usually silicon nitride / silicon oxide. [0003] In order to ensure the uniformity of the insulating film and the quality of the film, it is necessary to ensure the uniform diffusion of the gas and the cleanliness of the diffusion environment during the film formation process. In order to achieve the above effects, an aluminum gas diffusion plate is usua...

AI Technical Summary

Problems solved by technology

Dry grinding is to grind and polish the gas diffusion plate with abrasives. No water is added during the process. Although the cutting force is strong and the grinding efficiency is high, under high-speed rotation or vibration, the direct friction between the abrasive and the aluminum will generate a lot of heat. It is easy to cause aluminum burns

In addition, when polished in this way, it is easy to form an amorphous metamorphic layer on the surface of the gas diffusion plate.

[0005] After the gas diffusion plate repaired by the above-mentioned traditional regeneration treatment method is put into use again for a period of time (usually one month), foreign matters will accumulate and deposit on the surface, and these foreign matters will fall on the glass panel, which will not only cause liquid crystal screen The quality is abnormal, and it will also affect the service life of the gas diffusion plate

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