Optical recording medium, information recording apparatus and information reproduction apparatus
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United States of America Patent
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Dec 7, 2010
Grant Date -
Nov 16, 2006
app pub date -
Mar 24, 2006
filing date -
Mar 25, 2005
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An optical-recording medium is provided with at least a first recording layer for recording information optically; and a second recording layer for recording information optically by a light beam that passes through said first recording layer; wherein the track pitch of a recording track that is formed on said second recording layer is narrower than the track pitch of a recording track that is formed on said first recording layer.
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