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Liquid crystal display screen thinning pretreatment liquid and liquid crystal display screen thinning method

A liquid crystal display and pretreatment liquid technology, applied in the field of liquid crystal display thinning pretreatment liquid and liquid crystal display thinning, can solve the problem of increasing production costs, uneven thinning of glass substrates, and affecting the yield of liquid crystal displays and other problems, to achieve the effect of preventing crack enlargement, improving yield rate, and simple preparation process

Active Publication Date: 2013-08-21
WGTECH JIANGXI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing chemical etching thinning method usually directly adopts the aqueous solution of hydrofluoric acid as the chemical etching thinning liquid to chemically etch and thin the glass substrate, but after thinning in the etching thinning liquid, the surface of the glass substrate will be damaged. A large number of pits and scratches are generated, and even the glass substrate is thinned unevenly, which affects the yield rate of the liquid crystal display and increases the production cost

Method used

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  • Liquid crystal display screen thinning pretreatment liquid and liquid crystal display screen thinning method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of liquid crystal display thinning pretreatment liquid: take by weighing (CH 3 ) 3 SiOH, Na 2 SiO 3 and NaOH, mixed with water to prepare liquid crystal display thinning pretreatment liquid.

[0037] (2) Soak the TFT glass substrate in the liquid crystal display thinning pretreatment solution at a temperature of 30° C. for 2 hours, then clean the TFT glass substrate and dry it.

[0038] (3) Then put the TFT glass substrate into an etching tank containing 5% hydrofluoric acid solution of HF for chemical thinning, the temperature of chemical thinning is 40° C., and the time is 2 hours.

[0039] Such as figure 2As shown, the test method for the thinned TFT glass substrate is as follows: place sandpaper with a size of 10mm×10mm and a mesh number of 100 on a horizontal test bench, place the thinned TFT glass substrate on the sandpaper, and place it on the sandpaper. A pressure of 5Kg is applied on the TFT glass substrate, and the effect is characterized...

Embodiment 2

[0043] (1) Preparation of liquid crystal display thinning pretreatment liquid: take by weighing (CH 3 ) 2 Si(OH) 2 、K 2 SiO 3 and alkaline activators, mixed with water to prepare liquid crystal display thinning pretreatment solution, wherein the alkaline activators are NaOH and KOH.

[0044] (2) Soak the TFT glass substrate in the liquid crystal display thinning pretreatment solution at a temperature of 60° C. for 0.5 hour, then clean the TFT glass substrate and dry it.

[0045] (3) Then put the TFT glass substrate into an etching tank containing a hydrofluoric acid solution with a mass percentage of HF of 15% for chemical thinning. The chemical thinning temperature is 30° C. and the time is 2 hours.

[0046] Such as figure 2 As shown, the test method for the thinned TFT glass substrate is as follows: place sandpaper with a size of 10mm×10mm and a mesh number of 100 on a horizontal test bench, place the thinned TFT glass substrate on the sandpaper, and place it on the sa...

Embodiment 3

[0050] (1) Preparation of liquid crystal display thinning pretreatment liquid: take by weighing (CH 3 CH 2 ) 3 SiOH, K 2 SiO 3 and KOH and then mixed with water to prepare liquid crystal display thinning pretreatment liquid.

[0051] (2) Soak the TFT glass substrate in the liquid crystal display thinning pretreatment solution at a temperature of 40° C. for 1.5 hours, then clean the TFT glass substrate and dry it.

[0052] (3) Then put the TFT glass substrate into an etching tank containing a hydrofluoric acid solution with a mass percentage of HF of 20% for chemical thinning. The temperature of chemical thinning is 20° C. and the time is 3 hours.

[0053] Such as figure 2 As shown, the test method for the thinned TFT glass substrate is as follows: place sandpaper with a size of 10mm×10mm and a mesh number of 100 on a horizontal test bench, place the thinned TFT glass substrate on the sandpaper, and place it on the sandpaper. A pressure of 5Kg is applied on the TFT glass...

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Abstract

The invention relates to a liquid crystal display screen thinning pretreatment liquid, which comprises, by weight, 5-20% of silanol, 0.1-5% of an inorganic silicate, 0.01-1% of an alkali activator, and the balance of water, wherein the alkali activator is at least one selected from a metal hydroxide and a strong base weak acid salt. According to the present invention, the liquid crystal display screen thinning pretreatment liquid is filled in micro cracks on the surface of glass, and is combined with silicon-oxygen bonds on the surface of glass; and before a glass substrate is subjected to chemical thinning in a HF solution, the chemical substrate is soaked in the liquid crystal display screen thinning pretreatment liquid containing 5-20% by weight of silanol, 0.1-5% by weight of an inorganic silicate and 0.01-1% by weight of an alkali activator, such that enlargement of cracks on the glass substrate in the HF solution during the chemical thinning process is prevented so as to increase a liquid crystal display screen yield. In addition, the present invention further provides a liquid crystal display screen thinning method.

Description

【Technical field】 [0001] The invention relates to an etching thinning method of a liquid crystal display, in particular to a liquid crystal thinning pretreatment liquid and a thinning method of a liquid crystal display. 【Background technique】 [0002] At present, there are usually two thinning methods for liquid crystal displays, one is physical polishing and grinding, and the other is chemical etching thinning method. Among them, chemical etching thinning method is widely used because of its unique advantages. application. The existing chemical etching thinning method usually directly adopts the aqueous solution of hydrofluoric acid as the chemical etching thinning liquid to chemically etch and thin the glass substrate, but after thinning in the etching thinning liquid, the surface of the glass substrate will be damaged. A large number of pits and scratches are generated, and even cause uneven thinning of the glass substrate, thereby affecting the yield rate of the liquid ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C15/00
Inventor 杨会良孙一绮
Owner WGTECH JIANGXI
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