Study of metals by femtosecond laser processing for electro-optics applications

Cho Wei Chang, Tien Li Chang, Ting Kai Tsai, Chia Jen Ting, Chien Ping Wang, Chang Pin Chou

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Femtosecond laser (FS-laser) microstructuring of metals has become a promising tool because of its non-contact nature, which allows the micromachining and direct processing of materials with a minimized volume of heat-affected zone for electro-optics applications such as light emitting diodes (LED) and solar photovoltaic (PV) lighting. This study presents ultra-short pulse (10-15 sec) FS-laser processing. Through integrating the laser source, optical system and dynamic control modules, the materials of metals with micro-scale or nano-scale structures can be fabricated. In traditional processing such as semiconductor processing, development, exposure and etching necessitate expensive equipment and time-consuming tasks. With FS-laser processing, high-precision patterns are obtained, which will be a great benefit to keeping costs down. In this study, the wavelengths of FS-laser ablation are employed using visible and infrared light. To make a breakthrough in electro-optics processes, the CIGS thin-film of solar cells in metal process can be easily produced by the FS-laser. The ablation speed of the FS-laser for thin film layer CIGS solar cells can reach 2000 mm/s which is faster than the current Nd:YAG laser machine (-1000 mm/s). On the other hand, the minimum size of metal lines can be controlled to a value that is lower than 40 μm. Furthermore, green energy can be effectively developed for the future.

Original languageEnglish
Title of host publicationProceedings of Precision Engineering and Nanotechnology
PublisherTrans Tech Publications Ltd
Pages263-268
Number of pages6
ISBN (Print)9783037854280
DOIs
Publication statusPublished - 2012 Jan 1
Event4th International Conference of Asian Society for Precision Engineering and Nanotechnology, ASPEN 2011 - Hong Kong, China
Duration: 2011 Nov 162011 Nov 18

Publication series

NameKey Engineering Materials
Volume516
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

Other4th International Conference of Asian Society for Precision Engineering and Nanotechnology, ASPEN 2011
CountryChina
CityHong Kong
Period11/11/1611/11/18

Keywords

  • CIGS thin-film
  • Electro-optics
  • Electronics
  • Femtosecond laser
  • Metals
  • Solar cells

ASJC Scopus subject areas

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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  • Cite this

    Chang, C. W., Chang, T. L., Tsai, T. K., Ting, C. J., Wang, C. P., & Chou, C. P. (2012). Study of metals by femtosecond laser processing for electro-optics applications. In Proceedings of Precision Engineering and Nanotechnology (pp. 263-268). (Key Engineering Materials; Vol. 516). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.516.263