Information recording medium having wobbled groove structure
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United States of America Patent
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May 14, 2002
Issued Date -
N/A
app pub date -
Jan 18, 2001
filing date -
Jul 26, 1996
priority date (Note) -
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status (Latency Note)
Importance
Abstract
An information recording medium having a spiral or concentric-shaped groove structure along a track formed on a disk-like substrate. The medium has the groove structure wobbled in a radius direction of the medium and the track is divided into a plurality of recording units in the track direction by at least one radial boundary line. At least two adjacent recording units in the radius direction of the medium comprise one zone, and the groove structure included in the respective recording units within one zone has at least one of substantially the same number of wobbling and the wobbling cycle.
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