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Etchant composition for glass of flat panel display

A technology for flat panel displays and compositions, applied in the direction of surface etching compositions, chemical instruments and methods, etc., can solve the problems of difficulty in applying large-scale production, decreased cleaning ability, poor oxidation ability, etc., and achieve good etching quality and etching sheet The effect of increasing the number and prolonging the service life

Inactive Publication Date: 2009-07-15
EXAX INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to its poor oxidizing ability, the cleaning ability drops sharply, so it is difficult to apply to large-scale production

Method used

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  • Etchant composition for glass of flat panel display
  • Etchant composition for glass of flat panel display
  • Etchant composition for glass of flat panel display

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0024] Etching method

[0025] An etching solution composition prepared by mixing HF / sodium nitrate / inorganic acid (sulfuric acid, phosphoric acid, hydrochloric acid) / glycolic acid / fluorine-based surfactant / deionized water in the ratio shown in Table 1 below was prepared and maintained at 30°C. In order to remove contaminants, in the LCD process, the upper and lower plates are tightly combined and liquid crystal-infused etched alkali-free glass (NEG OA-21 of NEG Glass Co., Ltd., size: 370×470, thickness: 1.26t (1260μm)), and measured The thickness of each predetermined part is put into the etching solution. The etching amount is set as follows: pre-spray for about 10 minutes in advance to measure the etching ability, and then spray for a time corresponding to the required etching amount (1.26t→0.8t, ie 460μm) to perform etching.

[0026] In the spraying device used in the present invention, a storage tank is arranged at the lower part. The storage tank is made of acid-resistant (T...

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Abstract

The invention relates to a glass etchant composition, more specifically, to a glass etchant composition forming a panel display. The glass etchant composition comprises 5-20 wt.% of HF; 10-50 wt.% of more than one inorganic acid selected from a group consisting of HSO, HPO, HCl, HCO, HNO and HClO; 0.5-10 wt.% of carboxylic acid; 0.01-5 wt.% of an inorganic nitrate salt as a first additive; and water residual. The glass etchant composition here provided brings high quality for transparency and surface roughness of glass processed, with stable etching capability, long service life and increased etching efficiency (etching sheet numbers).

Description

Technical field [0001] The present invention relates to an etching solution composition for glass, and more specifically, to an etching solution composition for glass constituting a flat panel display. Background technique [0002] The glass etching solution composition of the present invention is used to replace or improve the conventionally used etchant whose main material is hydrofluoric acid (HF). The etchant used in the past with hydrofluoric acid as the main material is used to etch the surface of the glass while removing the contaminants remaining on the surface. However, due to the strong oxidizing ability of hydrofluoric acid, the transparency of the glass decreases and the surface Roughness increase, equipment corrosion, etc., as a result, research on using a small amount or completely replacing hydrofluoric acid has been going on for a long time. [0003] Among them, the more representative methods are: mixing inorganic salts containing ammonium bifluoride and fluoride...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C15/00
CPCC03C15/00C09K13/04C09K13/06C09K13/08
Inventor 禹贤金俊奭李俊烨白镇洙千一根朴皛俊李范锡
Owner EXAX INC
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