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Ultrashort-pulsed laser separation of glass-silicone-glass substrates: influence of material properties and laser parameters on dicing process and cutting edge geometry

  • In recent years, ultrashort pulsed lasers have increased their applicability for industrial requirements, as reliable femtosecond and picosecond laser sources with high output power are available on the market. Compared to conventional laser sources, high quality processing of a large number of material classes with different mechanical and optical properties is possible. In the field of laser cutting, these properties enable the cutting of multilayer substrates with changing material properties. In this work, the femtosecond laser cutting of phosphor sheets is demonstrated. The substrate contains a 230 micrometer thick silicone layer filled with phosphor, which is embedded between two glass plates. Due to the softness and thermal sensitivity of the silicone layer in combination with the hard and brittle dielectric material, the separation of such a material combination is challenging for both mechanical separation processes and cutting with conventional laser sources. In our work, we show that the femtosecond laser is suitable to cut the substrate with a high cutting edge quality. In addition to the experimental results of the laser dicing process, we present a universal model that allows predicting the final cutting edge geometry of a multilayer substrate.

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Metadaten
Author:Sandra StrojORCiD, Wolfgang Plank, Martin Muendlein
DOI:https://doi.org/10.1007/s00339-020-04192-z
ISSN:1432-0630
ISSN:0947-8396
Parent Title (English):Applied Physics A
Document Type:Article
Language:English
Year of publication:2021
Release Date:2022/01/25
Tag:Femtosecond laser; LED; Laser ablation; Laser dicing; Phosphor sheets
Volume:127. Jg.
Issue:H. 1
Article Number:7
Number of pages:7
Organisationseinheit:Forschung / Forschungszentrum Mikrotechnik
DDC classes:500 Naturwissenschaften und Mathematik / 530 Physik
Open Access?:ja
Peer review:wiss. Beitrag, peer-reviewed
Publicationlist:Stroj, Sandra
Licence (German):License LogoCreative Commons - CC BY - International - Attribution- Namensnennung 4.0