Effects Of Laser Parameters On The Mechanical Response Of Laser Irradiated Micro-Joints

Ahsan Mian, Tonfiz Mahmood, Greg Auner, Reiner Witte, Hans Herfurth, Golam Newaz

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

Abstract

This paper is devoted to the laser irradiated joints between glass and polyimide. To facilitate bonding between them, a thin titanium film with a thickness of approximately 0.2 μm was deposited on glass wafers using the physical vapor deposition (PVD) process. Two sets of samples were fabricated where the bonds were created using diode and fiber lasers. The samples were subjected to tension using a microtester for bond strength measurements. The failure strengths of the bonds generated using fiber laser are quite consistent, while a wide variation of failure strengths are observed for the bonds generated with diode laser. Few untested samples were sectioned and the microstructures near the bond areas were studied using an optical microscope. The images revealed the presence of a sharp crack in the glass substrate near the bond generated with the diode laser. However, no such crack was observed in the samples made using fiber laser. To investigate further the reasons behind such discrepancy in bond quality, three-dimensional uncoupled finite element analysis (FEA) was conducted for both types of samples. The transient heat diffusion-based FEA model utilizes the laser power intensity distribution as a time dependent heat source to calculate the temperature distribution within the substrates as a function of time.

Original languageEnglish
Title of host publicationElectrobiological Interfaces on Soft Substrates
PublisherMaterials Research Society
Pages90-95
Number of pages6
Volume926
ISBN (Print)1558998837, 9781558998834
DOIs
StatePublished - 2006
Externally publishedYes
Event2006 MRS Spring Meeting - San Francisco, CA, United States
Duration: Apr 17 2006Apr 21 2006

Publication series

NameMaterials Research Society Symposium Proceedings
Volume926
ISSN (Print)0272-9172

Conference

Conference2006 MRS Spring Meeting
Country/TerritoryUnited States
CitySan Francisco, CA
Period4/17/064/21/06

ASJC Scopus Subject Areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Disciplines

  • Materials Science and Engineering
  • Mechanical Engineering

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