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Proceedings Paper

Micromachining technologies for capillary electrophoresis utilizing Pyrex glass etching and bonding
Author(s): Jian Zhang; Thomas Haiqing Gong
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Paper Abstract

This paper presents the results about glass wet-etching and glass-to-glass bonding research for micro Capillary Electrophoresis and some other bio MEMS applications. Common glass and Pyrex glass had been chosen for the etching experiments with the HF-based series of etchants. Using negative photoresist, Shipley, together with the Au/Cr composite films as the masks, the etching rate of the glass in different concentration etchants had been investigated. Very fast etching rate, approximately 0.8micrometers /min, can be obtained. The mask we developed can stand more than 2 hours HF etching and very good glass surface had been obtained. The experimental results also had shown that there exist a big difference in etching rate between the common and Pyrex glass. Using anodic-like bonding skill, glass-to-glass mates with large area are realized with PECVD amorphous-Si as the intermediate layer. Micro Capillary Electrophoresis system had been developed by this technique and the test is still in progress. All these techniques also can be employed bio- MEMS chip in the future.

Paper Details

Date Published: 25 August 2000
PDF: 7 pages
Proc. SPIE 4174, Micromachining and Microfabrication Process Technology VI, (25 August 2000); doi: 10.1117/12.396454
Show Author Affiliations
Jian Zhang, Nanyang Technological Univ. (Singapore)
Thomas Haiqing Gong, Nanyang Technological Univ. (Singapore)


Published in SPIE Proceedings Vol. 4174:
Micromachining and Microfabrication Process Technology VI
Jean Michel Karam; John A. Yasaitis, Editor(s)

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