Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2005-06-01
2009-02-17
Dinh, Tan X (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S053200, C369S275400
Reexamination Certificate
active
07492697
ABSTRACT:
Data is recorded on an optical disc using a combination of a user data area where user data is recorded, a control data area for reproduction provided on an inner radius side of the user data area, and an outer guard zone provided on an outer radius side of the user data area as a unit of one recording operation. In this configuration, a track pitch TP of the optical disc is greater than or equal to 0.3 μm and smaller than or equal to 0.4 μm, and the width of the outer guard zone along a radius direction of the optical disc is greater than or equal to a value of (100×TP) and smaller than or equal to a value of (125×TP).
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Fuma Masato
Hattori Katsuki
Ide Tatsunori
Kashihara Yutaka
Ogawa Akihito
Chow Van N
Dinh Tan X
NEC Corporation
Pillsbury Winthrop Shaw & Pittman LLP
Sanyo Electric Co,. Ltd.
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