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Cutting thin glasses with ultrafast lasers

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Cutting thin glasses with ultrafast lasers

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  • Author: Matthias Domkea, Giovanni Pireddaa, Benjamin Bernardb , Victor Matylitsky
In recent years, the non-linear interaction phenomena of ultrafast laser pulses inside transparent media have attracted many researches and companies to develop several innovative glass-cutting strategies as shown by Kumkar et al. (2014). These processes are typically based on tight focusing several 10 – 100 µm below the surface. In this way, cutting of thin glasses with a thickness of about 50 µm may be difficult or even impossible. Thin glasses are due to their flexibility very attractive for bendable application. Consequently, the challenge for thin glass cutting is to achieve the highest cutting quality in order to maximize the bendability of the cut devices. In this study, a novel cutting strategy that combines back and front side ablation and improves the mechanical stability is presented.

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