Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2011-04-26
2011-04-26
Haley, Joseph (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S275200, C369S059250
Reexamination Certificate
active
07933192
ABSTRACT:
At least a first recording layer (L0layer) and a second recording layer (L1layer) are provided. The first recording layer is disc-shaped, and has a first recording track path formed for recording recording information. The second recording layer is disc-shaped, arranged on the first recording layer and has a second recording track path formed in an opposite direction to the first recording track path for recording recording information. On edge parts on the outer circumference sides of the first recording layer and the second recording layer, first buffer areas (104-0and104-1) are further provided for preventing a recording or reproducing position from deviating from the first recording layer or the second recording layer and for interlayer jump. At least a part of the first buffer area is previously formed as a pre-recording area by an embossed pit (in the case of DVD-RW) or by a pit formed by recording laser irradiation (in the case of DVD-R).
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Koda Takeshi
Kuroda Kazuo
Haley Joseph
Pioneer Corporation
Shen Kezhen
Young & Thompson
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