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Liquid crystal display glass substrate thinning process pretreatment agent

A liquid crystal display and glass substrate technology, applied in the field of liquid crystal display glass substrate thinning process pretreatment agent, can solve the problems of difficult waste liquid treatment, over-etching, and increased processing costs

Active Publication Date: 2019-01-04
重庆思昱兴电子材料有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] When making ultra-thin liquid crystal display screens, it is necessary to thin the glass substrate of the display screen, and the currently widely used hydrofluoric acid etching thinning method often shows pits caused by local overetching after thinning treatment. It is necessary to perform a long-term polishing process on the substrate surface, which seriously affects the production efficiency and increases the processing cost
In order to reduce the pits that appear in the thinning treatment, it is necessary to pretreat the glass substrate of the LCD screen before the thinning treatment. The existing pretreatment agent is prepared by adding a small amount of hydrofluoric acid and hydrochloric acid based on concentrated sulfuric acid. Although It can achieve a certain effect of reducing the pits of the thinned glass substrate, but a large amount of concentrated sulfuric acid is added to the pretreatment mixed acid, and the waste liquid generated after the pretreatment process is difficult to treat

Method used

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  • Liquid crystal display glass substrate thinning process pretreatment agent
  • Liquid crystal display glass substrate thinning process pretreatment agent
  • Liquid crystal display glass substrate thinning process pretreatment agent

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Embodiment Construction

[0013] The pretreatment agent for liquid crystal display glass substrate thinning process provided by the invention is prepared in the following way,

[0014] 1) Mix the prescribed amount of hydrochloric acid and hydrofluoric acid, add appropriate amount of water to dilute, then add the prescribed amount of hydrogen peroxide,

[0015] 2) Dissolve the hydroxypropyl methylcellulose of the prescribed amount in an appropriate amount of water until completely dissolved;

[0016] 3) the prescription amount of acetic acid is prepared into a 1% solution, and the prescription amount of chitosan is added and dissolved;

[0017] 3) Slowly add the mixed solution obtained in steps 1) and 2) into the mixed solution in step 3) respectively, make up the remaining amount of water and stir until mixed evenly.

[0018] Embodiment 1~4 formula sees the following table (mass percentage wt%)

[0019]

[0020] Chitosan adopted in the present invention is a product that meets GB 29941-2013

[00...

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Abstract

The invention provides a pretreatment agent for liquid crystal display glass substrate thinning technology. The agent comprises the following components in percentages by mass: 8-12% of HCl, 2-5% of HF, 0.3-0.5% of acetic acid, 0.5-1% of hydrogen peroxide, 1-2% of hydroxypropyl methyl cellulose (HPMC), 1-2% of chitosan, and the balance being water.

Description

technical field [0001] The invention relates to a composition used for etching pretreatment of liquid crystal display glass substrates. Background technique [0002] When making ultra-thin liquid crystal display screens, it is necessary to thin the glass substrate of the display screen, and the currently widely used hydrofluoric acid etching thinning method often shows pits caused by local overetching after thinning treatment. It is necessary to perform a long-time polishing treatment on the substrate display, which seriously affects the production efficiency and increases the processing cost. In order to reduce the pits that appear in the thinning treatment, it is necessary to pretreat the glass substrate of the LCD screen before the thinning treatment. The existing pretreatment agent is prepared by adding a small amount of hydrofluoric acid and hydrochloric acid based on concentrated sulfuric acid. Although It can achieve a certain effect of reducing the pits of the thinn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C15/00
CPCC03C15/00
Inventor 庞绮琪
Owner 重庆思昱兴电子材料有限公司
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