Optical recording medium and method for making the same
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United States of America Patent
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Jul 18, 2006
Grant Date -
Dec 25, 2003
app pub date -
Oct 3, 2002
filing date -
Jun 12, 2002
priority date (Note) -
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Abstract
A method for fabricating an optical recording medium is provided. A dye layer is formed on a molded substrate by spin-coating. A reflection layer is formed on the dye layer by sputtering so that the optical disc has enough reflection rate. The dye layer comprises a cyanine type dye and an azo metal chelate compound selected from the formula (I): ##STR00001## wherein M is a metal ion; R.sub.1 is a hydrogen atom, a linear or branched alkyl group containing 1 to 6 carbon atoms, amino group, alkyl amino group or toluidinyl group; R.sub.2 is a hydrogen atom, a hydroxyl group, a halogen atom, an ether group, an ester group or a linear or branched alkyl group containing 1 to 6 carbon atoms; R3 is a hydrogen atom or a linear or branched alkyl group containing 1 to 6 carbon atoms; R4 is a hydrogen atom, a halogen atom or a linear or branched alkyl group containing 1 to 6 carbon atoms; A1 is a heterocyclic derivative group constituted by carbon atoms and nitrogen atoms.
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