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Deterring theft of optical media

  • US 8,329,277 B2
  • Filed: 02/07/2011
  • Issued: 12/11/2012
  • Est. Priority Date: 03/21/2005
  • Status: Expired due to Fees
First Claim
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1. An optical media disk comprising a substrate surface having data encoded thereon, the substrate surface being treated with a light-sensitive material that is initially in a first phase, wherein the light-sensitive material deters theft of the optical media disk by causing the encoded data to be unreadable while the light-sensitive material is in the first phase, and wherein the light-sensitive material is to be changed from the first phase to a second phase, prior to a point of sale of the optical media disk, when exposed to a mercury-based light source having a predetermined wavelength, the encoded data to be readable when the light-sensitive material is in the second phase, and wherein the light-sensitive material is to permanently remain in the second phase after being exposed to the light source.

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