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Proceedings Paper

Miniature thermoacoustic cryocooler driven by a vertical comb-drive
Author(s): Zhili Hao; Mark Fowler; Jay A Hammer; Michael R Whitley; David Brown
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Paper Abstract

In this paper, we propose a novel miniature MEMS based thermoacoustic cryo-cooler for thermal management of cryogenic electronic devices. The basic idea is to exploit a new way to realize a highly-reliable miniature cryo-cooler, which would allow integration of a cryogenic cooling system directly into a cryogenic electronic device. A vertical comb-drive is proposed as the means to provide an acoustic source through a driving plate to a resonant tube. By exciting a standing wave within the resonant tube, a temperature difference develops across the stack in the tube, thereby enabling heat exchange between two heat exchangers. The use of gray scale technology to fabricate tapered resonant tube provides a way to improve the efficiency of the cooling system, compared with a simple cylinder configuration. Furthermore, a tapered tube leads to extremely strong standing waves with relatively pure waveforms and reduces possible harmonics. The working principle of this device is described here. The fabrication of this device is considered, which is compatible with current MEMS fabrication technology. Finally, the theoretical analysis of key components of this cryo-cooler is presented.

Paper Details

Date Published: 21 January 2003
PDF: 10 pages
Proc. SPIE 4983, MOEMS and Miniaturized Systems III, (21 January 2003); doi: 10.1117/12.472893
Show Author Affiliations
Zhili Hao, MEMS Optical, Inc. (United States)
Mark Fowler, SY Technology (United States)
Jay A Hammer, MEMS Optical, Inc. (United States)
Michael R Whitley, MEMS Optical, Inc. (United States)
David Brown, MEMS Optical, Inc. (United States)

Published in SPIE Proceedings Vol. 4983:
MOEMS and Miniaturized Systems III
James H. Smith, Editor(s)

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