Method for cutting glass by laser

Abstract

A method for cutting glass by laser comprises the following steps: (A) a laser focus is arranged on the lower surface of the glass; (B) laser beams form a cut surface in the glass; (C) with a machined surface ascending, the focus of the whole laser beams also ascends relative to the machined glass. In the invention, a bursting point is generated in the glass by the laser focus, the focus energy exceeds the damage threshold of the glass, the glass absorbs the laser energy to generate high temperature and points are burst on the glass and form the cut surface through a moving system, thus realizing fast and high-quality cutting of the glass.

Description

【Technical field】 [0001] The invention relates to a method for laser cutting glass. 【Background technique】 [0002] The biggest disadvantage of the traditional mechanical cutting method is the need to reprocess the processed edges and the resulting low yield. [0003] In mechanical cutting, an abrasive or mechanical wheel is used to score the glass, creating tangential tension along the cutting direction, causing the glass to crack along the scratch. The edge cut by this method is not smooth, has tiny cracks, residual asymmetric edge stress on the material, and residual debris. For many applications, microcracks caused by debris and localized stress will cause device failure, so post-cut edge grinding and / or polishing, or even heat treatment, is necessary to strengthen the edge. In addition, auxiliary agents are needed to assist cutting in mechanical wheel processing, and auxiliary agents may also stick to the edge of the finished product, requiring subsequent treatments s...

AI Technical Summary

Problems solved by technology

[0004] After the laser is generated, there is an existing method of using green laser or ultraviolet laser to cut shallow grooves on the glass surface and then repeat scanning to cut off. This method is extremely inefficient

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