Device and method for the laser-supported machining of a workpiece made of glass-based material and use of same

The device and procedure for laser-based processing of glass-based materials address the inefficiencies and X-ray generation issues in existing technologies by using an ultra-short pulse laser and a shielding element with high X-ray absorption, resulting in a controlled and efficient processing environment.

WO2025068383A1 Publication Date: 2025-04-03SCHOTT AG
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Patent Information

Application Number
PCT/EP2024/077092
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2023-09-28
Filing Date
2024-09-26
Publication Date
2025-04-03

AI Technical Summary

Technical Problem

Existing technologies for laser-based processing of glass-based materials are inefficient and do not enable rational manufacturing processes, particularly in industrial series production, due to the generation of X-rays during ultra-short pulse laser processing.

Method used

A device and procedure that utilize an ultra-short pulse laser to process glass-based materials by creating filament-shaped damage, while incorporating a shielding element with high X-ray absorption to contain and absorb the emitted X-rays, thereby creating a controlled and efficient processing environment.

Benefits of technology

The solution enables rational processing of glass-based materials by minimizing the spread of X-rays, allowing for efficient manufacturing processes and reducing the risk of X-ray exposure in industrial settings.

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Abstract

The invention relates to a device (100) and method (100) for the laser-supported machining of a workpiece (2) made of glass-based material, in particular for introducing damage into the workpiece (2), said device being configured to arrange the workpiece in the machining plane (W), with an ultra-short pulse laser (3), the focus region (1) of which lies at least partially within the workpiece and in which the irradiation intensity is so great that in the operating state, x-ray radiation is emitted from the focus region (1) in an energy range EM which is dependent on the composition of the workpiece. The focus region (1) is surrounded, at least in regions, by at least one shielding element (300, 310) for x-ray radiation, and thus provides a machining space (302). The shielding element (300, 310) comprises a material which has an x-ray absorption which is adapted to the energy range EM, in particular the material of the shielding element has a particularly high x-ray absorption in the energy range EM.
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