TFT glass substrate thinning process pretreatment agent

A technology of glass substrate and pretreatment agent, which is applied in the field of TFT glass substrate etching pretreatment composition, can solve problems such as difficult disposal of waste liquid, and achieve the effects of reducing pits, improving pretreatment effect, and good treatment effect

Active Publication Date: 2017-04-26
SHENZHEN HONGSHENGKAI TECH LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can achieve a certain effect of reducing the pits of the thinned glass substrate, 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 process.

Method used

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  • TFT glass substrate thinning process pretreatment agent
  • TFT glass substrate thinning process pretreatment agent
  • TFT glass substrate thinning process pretreatment agent

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Embodiment Construction

[0011] The TFT glass substrate thinning process pretreatment agent provided by the invention is prepared in the following way,

[0012] 1) Mix the prescribed amount of hydrochloric acid, nitric acid and hydrofluoric acid, add appropriate amount of water to dilute, add the prescribed amount of calcium chloride to dissolve,

[0013] 2) Dissolve the hydroxypropyl methylcellulose and gellan gum of the prescribed amount in an appropriate amount of water until completely dissolved;

[0014] 3) Slowly add the mixed solution obtained in step 1) into the mixed solution in step 2), make up the remaining amount of water, and then stir until the mixed solution is evenly mixed.

[0015] The formula of embodiment 1~4 sees the following table (mass percentage wt%)

[0016]

[0017] The gellan gum adopted in the present invention complies with GB 25535-2010 standard

[0018] The hydroxypropyl methylcellulose used in the present invention is produced by Anhui Shanhe Pharmaceutical Excipie...

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Abstract

Disclosed is a TFT (thin film transistor) glass substrate thinning process pretreatment agent. The TFT glass substrate thinning process pretreatment agent is prepared from the following components based on mass percentage: 8-12% of hydrochloric acid (HCl), 3-5% of nitric acid, 2-5% of hydrofluoric acid (HF), 5-6% of hydroxypropyl methyl cellulose (HPMC), 2-3% of gellan gum and the balance of water.

Description

technical field [0001] The invention relates to a composition for etching pretreatment of TFT glass substrates. Background technique [0002] When it is necessary to thin the TFT display glass substrate for the production of ultra-thin TFT (Thin Film Transistor, thin film transistor) display, it is necessary to perform thinning treatment on the glass substrate of existing specifications, and the currently widely used hydrofluoric acid etching In the thinning method, after the thinning process, the surface of the glass substrate often has pits caused by local over-etching, and it is necessary to perform a long-term polishing process on the surface of the substrate, which seriously affects the production efficiency and increases the processing cost. In order to reduce the pits in the thinning treatment, it is necessary to pretreat the glass substrate of the TFT liquid crystal screen (referred to as TFT glass) before the thinning treatment. Chinese patent CN 103951270B disclose...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C15/00
CPCC03C15/00
Inventor 庞绮琪
Owner SHENZHEN HONGSHENGKAI TECH LTD
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