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Electrophoretic display and novel process for its manufacture

  • US 6,788,449 B2
  • Filed: 08/29/2001
  • Issued: 09/07/2004
  • Est. Priority Date: 03/03/2000
  • Status: Expired due to Term
First Claim
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1. A process for the preparation of well-defined and isolated cells to be used in an electrophoretic display, which process comprises the steps of:

  • a) laminating a film with prepunched holes on a conductor layer;

    b) filling the holes with an electrophoretic fluid comprising charged pigment suspension in a dielectric solvent or solvent mixture and a dispersion of a sealing composition which has a specific gravity lower than that of the dielectric solvent or solvent mixture; and

    c) sealing the filled holes by hardening the sealing composition during or after it phase-separates and forms a supernatant layer above the electrophoretic fluid.

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