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Capacitance Detection in a Droplet Actuator

  • US 20100194408A1
  • Filed: 02/15/2008
  • Published: 08/05/2010
  • Est. Priority Date: 02/15/2007
  • Status: Active Grant
First Claim
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1. A method of determining the presence, partial presence or absence of a droplet at an electrode on a droplet actuator, the method comprising:

  • (a) providing a droplet actuator comprising;

    (i) a substrate comprising electrodes arranged on the substrate for conducting droplet operations on a surface of the substrate;

    (ii) a capacitance detection circuit for detecting capacitance at the droplet operations surface at one or more of the electrodes;

    (b) detecting capacitance at the droplet operations surface at one or more of the electrodes; and

    (c) determining from the capacitance the presence, partial presence or absence of a droplet at the droplet operations surface at the electrode.

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