Etching method for OGS (One Glass Solution) glass subjected to secondary chemical enhancement

Abstract

The invention relates to an etching method for OGS (One Glass Solution) glass subjected to secondary chemical enhancement, and the etching method comprises the following steps of: etching an OGS glass sheet in an etching bath for 6-15 minute, wherein an acid-resisting film is respectively adhered to the forward surface and back surface of the OGS glass sheet, the etching bath is filled with etching acid liquor, and the temperature of the etching bath is 30-35 DEG C, the etching acid liquor is prepared by mixing a hydrofluoric acid solution, auxiliary acid liquor and water at a volume ratio of (4-5):(1.5-2.5):(3-4), the auxiliary acid liquor is a mixture of one or more of a salpeter solution, a sulfuric acid solution or a hydrochloric acid solution, the mass concentration of the hydrofluoric acid solution is 40%, the mass concentration of the salpeter solution is 68%, the mass concentration of the sulfuric acid solution is 86%, and the mass concentration of the hydrochloric acid solution is 31%; bubbling the etching acid liquor in an etching process, wherein the bubbling amount is 50-150 l / min. According to the invention, the occurrence of irregular edge and sawteeth phenomena caused by the poor etching of OGS glass can be avoided, the glass strength is improved, and the problem of bad appearance caused by edge BM falling off and corrosion of an ITO circuit is avoided; micro cracks at the edges of glass can be effectively eliminated, so that the mechanical compressive resistance amplitude can be enhanced, and the strength and yield of the OGS glass can be significantly enhanced.

Description

technical field [0001] The invention relates to the technical field of chemical etching of OGS touch screens, in particular to a chemical etching method capable of effectively improving the strength and yield of OGS glass. Background technique [0002] The chemical secondary strengthening process of OGS glass is a necessary process in the production of touch screens of mobile phones or tablet computers. Among them, chemical etching is an important process in the chemical secondary strengthening of OGS glass. The mechanism is to use hydrofluoric acid solution to react with the edge of the glass substrate. , so that the micro-cracks on the edge of OGS glass products disappear, so as to achieve the purpose of improving the strength of the glass. In order to prevent the acid from corroding the ITO circuit or ink on the glass surface, resulting in ITO open circuit or ink falling off and causing poor electrical function or appearance, the front and back of OGS glass products are p...

AI Technical Summary

Problems solved by technology

[0003] In view of this, the technical problem to be solved by the present invention is to provide an etching method for chemical secondary strengthening of OGS glass. By adopting this etching method, the present invention can avoid uneven edges and sawtooth phenomenon caused by poor etching of OGS glass, and enhance the glass quality. Strength and avoid the problem of poor appearance caused by edge BM falling off and ITO circuit being corroded. It can effectively eliminate micro-cracks on the edge of the glass, increase the mechanical resistance to pressure, and effectively improve the strength and yield of OGS glass.