Data recording apparatus and associated method of imparting data to a recording medium by irradiating a reflectivity layer of the medium
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United States of America Patent
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May 22, 2007
Grant Date -
Jul 17, 2003
app pub date -
Dec 4, 2002
filing date -
Dec 5, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method is provided for recording medium having a substrate on which first data and second data are recorded as a protrusion/depression pattern and a reflective layer that is provided on a surface having the protrusion/depression pattern. Laser light is radiated to the reflective layer to change the protrusion/depression pattern of the second data, and third data used for identifying the recording medium is additionally recorded at a predetermined position on the recording medium.
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