INFORMATION RECORDING MEDIUM, INFORMATION REPRODUCING APPARATUS AND METHOD, AND APPARATUS FOR AND METHOD OF MANUFACTURING THE INFORMATION RECORDING
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United States of America Patent
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Issued Date -
May 21, 2009
app pub date -
Jul 13, 2006
filing date -
Jul 15, 2005
priority date (Note) -
Abandoned
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Abstract
An information recording medium (100) is provided with (i) a first information recording area wherein a first track for reproducing first information based on a first track pitch is formed by a laser beam, and (ii) a second information recording area wherein a second track for reproducing second information based on a second track pitch different from the first track pitch is formed by a laser beam. In the second track, a recording mark is previously recorded.
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