Pretreatment method for thinning glass

A glass thinning and pretreatment technology, which is applied in the field of glass thinning, can solve the problems of strong corrosion of hydrofluoric acid, damage to glass substrates, and influence on production efficiency, and achieve the goal of improving yield rate, product quality, and production efficiency Effect

Inactive Publication Date: 2018-01-30
HUIZHOU CITY QINGYANG IND
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

However, hydrofluoric acid is extremely corrosive, and there is a greater risk in use; in addition, before the glass substrate material is not thinned, it has defects such as pits and scratches, and these defects are enlarged after etching, resulting in Poor appearance can only be repaired by grinding, which affects production efficiency, and there is a risk of damaging the glass substrate during grinding

Method used

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  • Pretreatment method for thinning glass
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Examples

Experimental program
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Effect test

Embodiment 1

[0016] Add 1300L sulfuric acid into the closed liquid distribution tank, and prevent the volatilization of materials from affecting the working environment through the closed container. Weigh 11.14kg of nitric acid with an electronic scale, and use an electronic scale whose weighing unit can be accurate to two decimal places to ensure that the materials used are accurate. Add nitric acid into the sulfuric acid solution, then weigh 0.405 kg of ethylene glycol butyl ether with an electronic scale, add ethylene glycol butyl ether into the sulfuric acid solution; then weigh 27.36 kg of hydrochloric acid with an electronic scale, and add the hydrochloric acid into the sulfuric acid solution. After adding the material, heat the dosing tank. Make the temperature rise to 32° C., keep the temperature at this temperature, and then stir the above mixed solution for 30 minutes to make it evenly mixed to prepare the pretreatment solution.

[0017] Take the TFT glass substrate of model boe...

Embodiment 2

[0019] Take the TFT glass substrate of model C050 produced by Longteng Electronics Co., Ltd. as the test sample. Using the pretreatment solution prepared in Example 1, 160 unthinned TFT glass substrates with a thickness of 1.0mm were placed in the basket, and then the basket was put into the solution tank for soaking. During soaking, use The laser thickness gauge monitors the thickness of the TFT glass substrate in real time, and its thinning thickness is 30 microns. During immersion, take out the dosing solution in the dosing tank, test the concentration of nitric acid by titration, and replenish nitric acid in time to ensure that the concentration does not change much. The soaking time is 2000s, and the reaction rate is 0.015μm / s. After the treatment, the basket was taken out, and the pits and scratches on the surface of the TFT glass substrate were observed. Among them, the glass substrate with obvious pits accounted for 0.01% of the total amount, and the glass substrate w...

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Abstract

The invention discloses a pretreatment method for thinning glass. The pretreatment method comprises the following steps of: adding nitric acid, ethylene glycol butyl ether, hydrochloric acid and traceHF into sulfuric-acid solution in sequence according to the priority order and preparing pretreatment blended liquid, wherein the nitric acid accounts for 0.55% of the solute mass fraction of the pretreatment blended liquid, the ethylene glycol butyl ether accounts for 0.02% of the solute mass fraction of the pretreatment blended liquid, the hydrochloric acid accounts for 1.35% of the solute massfraction of the pretreatment blended liquid, the hydrofluoric acid accounts for 0.4% of the solute mass fraction of the pretreatment blended liquid; heating the pretreatment blended liquid to 31-33 DEG C, keeping constant temperature, stopping stirring after stirring for 30 minutes; putting a glass substrate without being thinned into the pretreatment blended liquid for thinning, wherein the thinning speed is 0.015-0.018mu m/s and the thinning thickness is less than 45mu m. The pretreatment method disclosed by the invention has the advantages that the bad phenomena such as pits and scratcheson the surface of the glass substrate are repaired and suppressed, so that the good-product rate in the following thinning procedure is increased, the grinding procedure is saved, the production efficiency is improved, the cost is effectively saved and simultaneously the product quality is improved.

Description

technical field [0001] The invention relates to the technical field of glass thinning, in particular to a pretreatment method for glass thinning. Background technique [0002] With the development of modern science and technology, electronic display equipment, glass instruments, instruments and other products tend to be thinner and lighter, and the thinning treatment technology of its glass display substrate has attracted much attention. At present, thinning by chemical etching process is more common, and hydrofluoric acid is generally used to etch glass. However, hydrofluoric acid is extremely corrosive, and there is a greater risk in use; in addition, before the glass substrate material is not thinned, it has defects such as pits and scratches, and these defects are enlarged after etching, resulting in Poor appearance can only be repaired by grinding, which affects production efficiency, and there is a risk of damaging the glass substrate during grinding. Contents of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C15/00
Inventor 郑资来毛先国
Owner HUIZHOU CITY QINGYANG IND
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