Device having a liquid flowpath
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United States of America Patent
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Mar 7, 2006
Issued Date -
N/A
app pub date -
Sep 19, 2002
filing date -
Sep 20, 2001
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Abstract
A micro-reactor is provided with a mixture of channels having larger cross-sectional areas (17′,22′,25′,27′,31′,33′) and channels having smaller cross-sectional areas (40a′,40b′,40c′). The smaller channels (40a′,40b′,40c′) resist liquid movement driven by hydrostatic force but allow liquid movement driven by electro-osmotic force. Accordingly liquid flow is almost entirely driven by electro-osmotic force. The smaller channels (40a′,40b′,40c′) are formed by etched grooves which are closed by a planar surface 13. This allows the cross-sectional areas of the smaller channels to be closely and reproducibly controlled.
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