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Optical recording medium and recording and/or reproduction method using the same

  • US 6,057,020 A
  • Filed: 04/27/1998
  • Issued: 05/02/2000
  • Est. Priority Date: 04/28/1997
  • Status: Expired due to Fees
First Claim
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1. An optical recording medium comprising a substrate and a recording layer formed thereon comprising an azo metal chelate compound which comprises an azo moiety of formula (I) and a bivalent or trivalent metal:

  • ##STR15## wherein X is OH group, COOH group or CONH2 group;

    Y is a residual group forming a heterocyclic ring in combination with nitrogen atoms bonded thereto; and

    Z is a residual group forming an aromatic ring in combination with carbon atoms bonded thereto, wherein said azo metal chelate compound exhibits a maximum absorption in a wavelength range of 450 to 630 nm.

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