Optical recording medium and optical recording and reading method using the same
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United States of America Patent
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May 6, 2003
Grant Date -
Nov 22, 2001
app pub date -
Mar 2, 2001
filing date -
Mar 7, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical recording medium has a substrate and a recording layer formed thereon, the recording layer containing at least one squarylium compound and one azo metal chelate compound including an azo moiety of formula (I-1) or (I-2) and a metal: ##STR1## wherein A, B, A', and X are the same as those previously defined in the specification. Writing and reading steps are performed by the application of a semiconductor laser beam with a wavelength in a range from 600 to 720 nm.
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