Effects of focusing condition on micro-welding characteristics of borosilicate glass by picosecond pulsed laser

Tomohiro Takekuni, Yasuhiro Okamoto, Takahiro Fujiwara, Akira Okada, Isamu Miyamoto

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

2 Citations (Scopus)

Abstract

Glass materials are widely used in products such as optical components and semiconductor devices. In these products, precision welding techniques of glass are required to manufacture small and complicated shape. The laser welding method can perform the joining without an intermediate layer and an adhesive agent. In addition, an ultra-short pulse laser can reduce the heat affected zone with the high space accuracy. However, heating and cooling cycles are repeated even in the case of ultra-short pulsed laser. The temperature distribution and change of molten area are influenced not only by laser energy condition but also focusing condition. Therefore in this study, effects of focusing condition of laser beam on micro-welding characteristics of glass were experimentally investigated by using a picosecond pulsed laser. A usage of object lens with the spherical aberration correction led to a large molten area even at the same pulse energy, which related to the efficient welding of glass materials. An optical system with the spherical aberration correction led to stabilizing the shape of molten area, which resulted in the reliable weld joint.

Original languageEnglish
Title of host publicationRecent Development in Machining, Materials and Mechanical Technologies
EditorsJyh-Chen Chen, Usuki Hiroshi, Sheng-Wei Lee, Yiin-Kuen Fuh
PublisherTrans Tech Publications Ltd
Pages461-467
Number of pages7
ISBN (Print)9783038354956
DOIs
Publication statusPublished - Jan 1 2015
EventInternational Conference on Machining, Materials and Mechanical Technologies, IC3MT 2014 - Taipei City, Taiwan, Province of China
Duration: Aug 31 2014Sep 5 2014

Publication series

NameKey Engineering Materials
Volume656-657
ISSN (Print)1013-9826
ISSN (Electronic)1662-9795

Other

OtherInternational Conference on Machining, Materials and Mechanical Technologies, IC3MT 2014
CountryTaiwan, Province of China
CityTaipei City
Period8/31/149/5/14

Keywords

  • Glass
  • Micro-welding
  • Numerical aperture
  • Ultra-short pulsed laser

ASJC Scopus subject areas

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

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  • Cite this

    Takekuni, T., Okamoto, Y., Fujiwara, T., Okada, A., & Miyamoto, I. (2015). Effects of focusing condition on micro-welding characteristics of borosilicate glass by picosecond pulsed laser. In J-C. Chen, U. Hiroshi, S-W. Lee, & Y-K. Fuh (Eds.), Recent Development in Machining, Materials and Mechanical Technologies (pp. 461-467). (Key Engineering Materials; Vol. 656-657). Trans Tech Publications Ltd. https://doi.org/10.4028/www.scientific.net/KEM.656-657.461