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Proceedings Paper

Femtosecond fiber laser welding of PMMA
Author(s): Annalisa Volpe; Francesca Di Niso; Caterina Gaudiuso; Andrea De Rosa; Rebeca Martìnez Vàzquez; Antonio Ancona; Pietro Mario Lugarà; Roberto Osellame
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Paper Abstract

Femtosecond-pulsed laser welding of transparent materials on a micrometer scale is a versatile tool for the fabrication and assembly of electronic, electromechanical, and especially biomedical micro-devices. In this paper, we report on microwelding of two transparent layers of polymethyl methacrylate (PMMA) with femtosecond laser pulses at 1030 nm in the MHz regime. We aim at exploiting localized heat accumulation to weld the two layers without any preprocessing of the sample and any intermediate absorbing media, by focusing fs-laser pulses at the interface.

The modifications produced by the focused laser beam into the bulk material have been firstly investigated depending on the laser process parameters aiming to produce continuous melting. Results have been evaluated based on heat accumulation models. Finally, fs-laser welding of PMMA samples have been successfully demonstrated and tested by leakage tests for application in direct laser assembly of microfluidic devices.

Paper Details

Date Published: 12 March 2015
PDF: 9 pages
Proc. SPIE 9351, Laser-based Micro- and Nanoprocessing IX, 935106 (12 March 2015); doi: 10.1117/12.2078789
Show Author Affiliations
Annalisa Volpe, Institute for Photonics and Nnanotechnologies, CNR (Italy)
Univ. degli Studi di Bari (Italy)
Francesca Di Niso, Institute for Photonics and Nnanotechnologies, CNR (Italy)
Univ. degli Studi di Bari (Italy)
Caterina Gaudiuso, Institute for Photonics and Nnanotechnologies, CNR (Italy)
Univ. degli Studi di Bari (Italy)
Andrea De Rosa, Istituto di Fotonica e Nanotecnologie, CNR (Italy)
Rebeca Martìnez Vàzquez, Istituto di Fotonica e Nanotecnologie, CNR (Italy)
Antonio Ancona, Institute for Photonics and Nnanotechnologies, CNR (Italy)
Pietro Mario Lugarà, Institute for Photonics and Nnanotechnologies, CNR (Italy)
Univ. degli Studi di Bari (Italy)
Roberto Osellame, Institute for Photonics and Nnanotechnologies, CNR (Italy)


Published in SPIE Proceedings Vol. 9351:
Laser-based Micro- and Nanoprocessing IX
Udo Klotzbach; Kunihiko Washio; Craig B. Arnold, Editor(s)

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