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Etching solution and secondary hardening method of glass for capacitive touch screen

A capacitive touch screen and secondary strengthening technology, applied in the field of capacitive touch screen, can solve the problems of poor mechanical strength of glass, easy glass breakage, etc.

Active Publication Date: 2015-04-29
YICHANG NANBO DISPLAY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The usual method is to soak OGS glass in pure HF for secondary strengthening treatment, but the mechanical strength of the glass after this treatment is still poor, so the glass is still relatively easy to break

Method used

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  • Etching solution and secondary hardening method of glass for capacitive touch screen

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The secondary strengthening steps of the capacitive touch screen glass of the present embodiment are as follows:

[0045] (1) paste acid-resisting film on two relative surfaces of glass, put the glass with acid-resisting film into vacuum defoaming machine then and carry out vacuum defoaming process, the pressure during vacuum defoaming process is 3.5 kilograms, The time is 15 minutes.

[0046] (2) First add 205L of water in the etching tank, then add 49% HF by mass concentration and 68% HNO by mass concentration respectively 3 , HCl and sodium dodecylsulfonate with a mass percentage concentration of 36% are stirred evenly, and are prepared into an etching solution, so that the etching solution includes 10.7% HF and 10.9% HNO according to the mass percentage 3 , 3.84% HCl and 0.3% sodium dodecylsulfonate.

[0047] (3) The glass with the acid-resistant film is driven into the etching solution by the transmission roller, etched at 12° C. for 20 minutes, washed with water...

Embodiment 2

[0050] The secondary strengthening steps of the capacitive touch screen glass of the present embodiment are as follows:

[0051] (1) paste acid-resisting film on two relative surfaces of glass, then put the glass with acid-resisting film into vacuum defoaming machine and carry out vacuum defoaming process, the pressure during vacuum defoaming process is 5 kilograms, The time is 5 minutes.

[0052] (2) First add 205L of water in the etching tank, then add 49% HF by mass concentration and 68% HNO by mass concentration respectively 3 , HCl and sodium dodecylsulfonate with a mass percentage concentration of 36%, stirred evenly, and made into an etching solution, so that the etching solution includes 11.84% HF, 10.51% HNO according to the mass percentage 3 , 3.48% HCl and 0.1% sodium dodecylsulfonate.

[0053] (3) The glass with the acid-resistant film is driven into the etching solution by the transmission roller, etched at 20° C. for 15 minutes, washed with water, and taken up ...

Embodiment 3

[0056] The secondary strengthening steps of the capacitive touch screen glass of the present embodiment are as follows:

[0057] (1) paste acid-resisting film on two relative surfaces of glass, put the glass with acid-resisting film into vacuum defoaming machine then and carry out vacuum defoaming process, the pressure during vacuum defoaming process is 3.5 kilograms, The time is 15 minutes.

[0058] (2) First add 205L of water in the etching tank, then add 49% HF by mass concentration and 68% HNO by mass concentration respectively 3 , HCl and sodium dodecylsulfonate with a mass percentage concentration of 36%, stirred evenly, and made into an etching solution, so that the etching solution includes 11.2% HF, 10.9% HNO according to the mass percentage 3 , 3.5% HCl, 0.15% sodium dodecylsulfonate and water.

[0059] (3) The glass with the acid-resistant film is driven into the etching solution by the transmission roller, etched at 16° C. for 18 minutes, washed with water, and t...

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Abstract

The invention relates to an etching solution and a secondary hardening method of glass for a capacitive touch screen. The etching solution comprises components in percentage by mass as follows: 10.7%-12.84% of HF (hydrogen fluoride), 10.51%-10.9% of HNO3, 3.48%-3.84% of HCl, 0.1%-0.3% of sodium dodecyl sulfate and water. The etching solution can improve the bending strength of the glass for the capacitive touch screen.

Description

technical field [0001] The invention relates to the field of capacitive touch screens, in particular to an etching solution and a secondary strengthening method for glass used in capacitive touch screens. Background technique [0002] Capacitive touch screen (OGS, One Glass Solution) technology refers to the technology of directly forming conductive film and sensor on the protective glass, and a piece of glass plays the dual role of protective glass and touch sensor at the same time. The glass is referred to as OGS glass for short. [0003] During the preparation process of the OGS touch screen, after the OGS glass is cut, cracks are likely to occur at the cutting place, which further reduces the bending strength of the OGS touch screen and is easily broken. Usually, a subsequent secondary strengthening process is required to overcome the above problems. The usual method is to soak the OGS glass in pure HF for secondary strengthening treatment. However, the mechanical stre...

Claims

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Application Information

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IPC IPC(8): C03C15/00
CPCC03C15/00
Inventor 林钦遵黄勇祥郑建万高志文樊小猛左磊
Owner YICHANG NANBO DISPLAY
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