Optical information recording method and medium

  • US 5,155,723 A
  • Filed: 04/14/1989
  • Issued: 10/13/1992
  • Est. Priority Date: 07/30/1988
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for optically recording information on an optical information recording medium having a light transmitting substrate, a light absorptive layer overlaying the substrate to absorb a laser beam and a light reflective layer overlaying the light absorptive layer, said method comprising the steps of:

  • energizing the light absorptive layer by a laser beam entered through the light transmitting substrate in order to generate energy, and locally deforming, by the energy thereby generated by the light absorptive layer, a surface layer of the substrate adjacent to the light absorptive layer, to form optically readable pits in the surface layer of the substrate.

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