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
Pages263-268
Number of pages6
DOIs
Publication statusPublished - 2012 Jun 29
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

Other

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

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Keywords

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

ASJC Scopus subject areas

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

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). https://doi.org/10.4028/www.scientific.net/KEM.516.263