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Light modulators

  • US 7,327,511 B2
  • Filed: 03/22/2005
  • Issued: 02/05/2008
  • Est. Priority Date: 03/23/2004
  • Status: Active Grant
First Claim
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1. In a process for forming an electrophoretic medium, which process comprises:

  • (a) providing a substrate;

    (b) applying to the substrate a coating material comprising a plurality of capsules in a liquid phase, each of the capsules comprising a suspending fluid and a plurality of electrically charged particles disposed in the suspending fluid and capable of moving therethrough on application of an electric field to the capsule, and subjecting the coating material to conditions effective to cause formation of a coherent solid layer containing the capsules on the substrate; and

    (c) applying an adhesive layer over the capsule-containing layer on the substrate,the improvement which comprises planarizing the capsule-containing layer on the substrate after step (b) but before step (c).

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