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Fluid-based switch

  • US 6,872,904 B2
  • Filed: 09/14/2004
  • Issued: 03/29/2005
  • Est. Priority Date: 04/14/2003
  • Status: Expired due to Fees
First Claim
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1. A switch comprising:

  • first and second mated substrates defining therebetween at least portions of a number of cavities;

    a plurality of wettable pads exposed within one or more of the cavities;

    a switching fluid, wettable to said pads and held within one or more of the cavities, that serves to open and block light paths through one or more of the cavities in response to forces that are applied to the switching fluid;

    a surface tension modifier coating at least a portion of the switching fluid; and

    an actuating fluid, held within one or more of the cavities, that applies the forces to said switching fluid.

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