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Content replication deterrent method on optical discs

  • US 20030219124A1
  • Filed: 04/09/2003
  • Published: 11/27/2003
  • Est. Priority Date: 04/10/2002
  • Status: Abandoned Application
First Claim
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1. A method for fabricating an optical medium readable by an optical reader, said method comprising the steps of:

  • (a) molding a substrate so as to have a first major surface with information pits and information lands thereon and a second major surface that is relatively planar;

    (b) applying a reflective material over the first major surface so as to cover a portion of said first major surface but not all of said surface;

    (c) applying an optical state change security material capable of converting from a first optical state to a second optical state upon exposure to the laser of an optical reader to the portion of said first major surface of step (b) that is devoid of the reflective material; and

    (d) applying a reflective material over that portion of said first major surface that wherein said optical state change security material is positioned in step (c).

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