A valve-less planar pump isotropically etched in silicon
- 1 March 1996
- journal article
- Published by IOP Publishing in Journal of Micromechanics and Microengineering
- Vol. 6 (1) , 87-91
- https://doi.org/10.1088/0960-1317/6/1/020
Abstract
The first valve-less diffuser fluid pump in silicon is presented. It consists of a planar double-chamber arrangement fabricated in a silicon wafer anodically bonded to a glass wafer. The pump uses fluid-directing diffuser - nozzle elements which have a depth of and a neck width of . The pump chamber diameter is 6 mm. Pump cavities and diffuser - nozzle elements are etched with an isotropic HNA silicon etch. Pumps with three different diffuser lengths are compared reaching a maximum pump capacity of and a maximum pump pressure of 1.7 m at a resonance frequency of 1318 Hz for methanol.Keywords
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