Cutting thin glass by femtosecond laser ablation
SCIE
SCOPUS
- Title
- Cutting thin glass by femtosecond laser ablation
- Authors
- Shin, Hyesung; Kim, Dongsik
- Date Issued
- 2018-06
- Publisher
- ELSEVIER SCI LTD
- Abstract
- The femtosecond laser ablation process for cutting thin aluminoborosilicate glass sheets of thickness 100 mu m was investigated with emphasis on effective cutting speed (V-eff) and mechanical strength of diced samples. The process parameters including the laser fluence (F), overlap ratio (r) of the laser beam and polarization direction were varied at a fixed pulse repetition rate f= 1 kHz to find the optimal process condition that maximizes V-eff and edge strength. A three-point bending test was performed to evaluate the front-side and back-side bending (edge) strength of the laser-cut samples. V-eff was proportional to F unless r exceeded a critical value, at which excessive energy began to be delivered at the same spot. The front-side edge strength was bigger than the back-side strength because of the back-side damages such as chipping. Good edge strength, as high as similar to 280 MPa (front-side) and similar to 230 MPa (back-side), was obtained at F = 19 J/m(2), r = 0.99, with laser polarization vertical to the cutting path. (C) 2017 Elsevier Ltd. All rights reserved.
- Keywords
- THERMAL-CRACK PROPAGATION; ULTRASHORT-PULSE LASER; OPTICAL WAVE-GUIDES; DISPLAY GLASS; FILAMENTATION; IRRADIATION; IMPROVEMENT; MORPHOLOGY; EFFICIENCY; SURFACES
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/50903
- DOI
- 10.1016/j.optlastec.2017.12.020
- ISSN
- 0030-3992
- Article Type
- Article
- Citation
- OPTICS AND LASER TECHNOLOGY, vol. 102, page. 1 - 11, 2018-06
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