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Methods and systems for fluid control in microfluidic devices

  • US 20030019522A1
  • Filed: 09/18/2001
  • Published: 01/30/2003
  • Est. Priority Date: 07/26/2001
  • Status: Active Grant
First Claim
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1. A valve for use in a microfluidic system, comprising:

  • a substrate defining an upstream channel and a downstream channel joined by a passage, the passage comprising a first surface; and

    a thermally responsive substance (TRS) disposed, when the valve is in the closed state, to substantially obstruct the passage, wherein pressure present in the upstream channel urges at least a portion of the TRS against the first surface.

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