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Experiment of Micro Cantilever Deflection by Thermal Bubble Growth in Liquid

[+] Author Affiliations
Heon J. Lee, Young-Soo Chang, Jong-Seob Ahn, Yoon-Pyo Lee

Korea Institute of Science and Technology, Seoul, Korea

Ho-Young Kim

Seoul National University, Seoul, Korea

Paper No. HT2005-72486, pp. 487-489; 3 pages
  • ASME 2005 Summer Heat Transfer Conference collocated with the ASME 2005 Pacific Rim Technical Conference and Exhibition on Integration and Packaging of MEMS, NEMS, and Electronic Systems
  • Heat Transfer: Volume 2
  • San Francisco, California, USA, July 17–22, 2005
  • Conference Sponsors: Heat Transfer Division and Electronic and Photonic Packaging Division
  • ISBN: 0-7918-4732-2 | eISBN: 0-7918-3762-9
  • Copyright © 2005 by ASME


Micro cantilevers are significant structure for MEMS devices, such as bio-chips, sensors and STEM/AFM probes. The beam deflection and its characteristics have been studied for various purposes. In this study, expending bubbles from thermal surface exert force on micro-cantilever beam and causes deflection of the beam. Cantilevers were fabricated by classic MEMS fabrication method; photolithography and dry etching. The micro-beam was fabricated from <100> n-type silicon wafer and its thickness varies from 10 micron to 30micron with various geometry (length, width and tip shapes). The distance from thermal surface and cantilever beam is also significant variables for analysis of bubble-beam interaction. We observed beam deflection with respect to various bubble generation conditions (bubble size, contact area and generating frequency). Simple analysis of bubble-beam interaction were performed and compared with experimental results.

Copyright © 2005 by ASME



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