Chemical thinning method of alkali-free boroaluminosilicate glass

Abstract

The invention relates to a chemical thinning method of alkali-free boroaluminosilicate glass. The chemical thinning method comprises the following steps: step 1, preparing thinning etching liquid; step 2, performing visual examination on alkali-free borosilicate glass; step 3, performing sealing treatment on the periphery of the alkali-free borosilicate glass; step 4, cleaning the alkali-free borosilicate glass; step 5, putting the alkali-free borosilicate glass into the prepared etching liquid groove for performing etching; and step 6, cleaning, drying and measuring the etched alkali-free borosilicate glass. The chemical thinning method has the following advantages: the chemical thinning method improves the etching quality of the alkali-free boroaluminosilicate glass, the etching qualityis good, the glass with the thickness of 0.8mm can be thinned to 0.4mm, even lower than 0.4mm, the thinning time is short, the thinning yield is high, the glass surface etching effect is good, the method is applicable to large-scale production in factories, and the etching liquid for thinning is easy to prepare.

Description

technical field [0001] The invention relates to the technical field of glass production, in particular to a chemical thinning method for alkali-free boroaluminosilicate glass. Background technique [0002] Alkali-free boroaluminosilicate glass is mainly used in TFT-LCD liquid crystal display glass substrates. As consumers have higher and higher requirements for liquid crystal displays, especially the development trend of thinner and lighter electronic products in recent years. At present, there are mainly two thinning technologies for alkali-free boroaluminosilicate glass, which are thinning by physical polishing and thinning by chemical methods. Compared with physical polishing thinning, chemical thinning has the following advantages: (1) short thinning time; (2) high thinning output, suitable for large-scale production in factories; (3) easy preparation of etching solution for thinning . However, in the prior art, the main components of the etching solution for thinning ...

AI Technical Summary

Problems solved by technology

However, in the prior art, the main components of the etching solution for thinning alkali-free boroaluminosilicate glass are hydrofluoric acid and pure water, the etching effect on the glass surface is poor, and the scratches on the glass surface are enlarged.