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Laser cutting method for glass

A laser cutting and glass technology, applied in the field of laser applications, can solve the problem of ineffective laser energy gathering, and achieve the effect of overcoming mechanical cutting, narrow slits and smooth cutting surfaces

Inactive Publication Date: 2015-06-10
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

Although coating a layer of non-volatile transparent substance will increase the absorption of laser energy by the material, the absorption of light with a shorter wavelength of 980nm-1064nm will be much reduced, which will make the energy of the laser unable to effectively gather

Method used

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  • Laser cutting method for glass

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Embodiment Construction

[0016] In order to describe in detail the technical content, structural features, achieved objectives and effects of the invention, the following descriptions are combined with the embodiments.

[0017] Such as figure 1 As shown, a method for laser cutting glass first selects the position to be cut of a glass plate with a glass thickness of 0.5-1.5 mm.

[0018] Then apply a layer of titanium dioxide to the part that needs to be cut on the glass plate.

[0019] The light absorption rate of the glass to the wavelength of 10.6μm is very high, which can reach 90%, but as the wavelength becomes smaller and smaller, the light absorption rate of the glass becomes smaller and smaller, from the ultraviolet band to the laser with a wavelength of 1064nm The absorption rate is less than 10%, so it means that a layer of non-volatile light-shielding material is applied, and the covering layer is titanium dioxide, which can make it difficult for the laser to pass through the glass surface, and the...

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Abstract

The invention discloses a laser cutting method for glass. The laser cutting method comprises the following steps: finding out a to-be-cut position of a glass plate; coating the to-be-cut part of the glass plate with a layer of non-volatile light-shading substance; and moving a laser beam along the to-be-cut part to cut. The laser cutting method for glass disclosed by the invention adopts the shading layer to prevent the laser from penetrating through the glass and absorbing heat on the shaded part, so that the cutting efficiency is improved.

Description

Technical field [0001] The invention relates to the field of laser applications, in particular to a method for laser cutting glass. Background technique [0002] The conventional method of cutting glass substrate is to use diamond grinding wheel or cemented carbide wheel to scribe, and then mechanically break the glass. Although this method is relatively simple, after the scribing and breaking process, the strength of the glass will be reduced at most due to the generation of residual stress and micro-cracks at the edge of the glass, and the subsequent processes such as cleaning, polishing, and heat treatment need to be increased. In the cleaning process of the substrate surface, tiny debris may also cause damage to the glass surface. The internal damage of mechanical scribing to the glass becomes a potential factor leading to the failure of the display. [0003] Chinese Invention Patent Publication CN1(02531371)A discloses a method for laser cutting glass, which includes selecti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B33/02
Inventor 王旭葆刘俊吴丹王小磊米庆改
Owner BEIJING UNIV OF TECH
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