Novel microfluidic flow sensor based on a microchannel capped by porous silicon

✍ Scribed by Pagonis, D. N. ;Petropoulos, A. ;Kaltsas, G. ;Nassiopoulou, A. G. ;Tserepi, A.

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 284 KB
• Volume: 204
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200674389

✦ Synopsis

Abstract

This work concerns the fabrication, modeling and characterization of a novel microfluidic flow sensor based on a microchannel capped with a porous silicon membrane, on top of which the sensor active elements are integrated. The microchannel is formed through a two‐step anodization process. In the first step a mesoporous silicon layer is formed on a lithographically defined area, while in the second step a channel is formed underneath the porous layer by electropolishing. The channel is buried into bulk silicon and capped with a free‐standing porous silicon layer, which is co‐planar with the Si substrate. The overall developed process for the formation of the device will be described and simulation and device characterization results will be presented. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)