Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2006-10-17
2006-10-17
Edun, Muhammad (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S283000, C369S053200
Reexamination Certificate
active
07123574
ABSTRACT:
In a recording medium which is circular and has first and second recording layers, the first and second recording layers each include one or more first tracks extending concentrically or spirally and one or more second tracks extending concentrically or spirally, each of the one or more first tracks and the one or more second tracks includes a plurality of first sectors and a plurality of second sectors, each of the plurality of first sectors includes first and second regions, each of the plurality of second sectors includes third and fourth regions, first and second grooves are formed in each of the second and fourth regions, the first and second grooves extending concentrically or spirally and oscillating sinusoidally, oscillation of the first groove has a first oscillation characteristic at a first prescribed position in the second region, oscillation of the second groove has a second oscillation characteristic at a second prescribed position in the fourth region, and the first and second oscillation characteristics are different from each other.
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Hisakado Yuji
Ishida Takashi
Nakamura Atsushi
Shoji Mamoru
Edun Muhammad
Matsushita Electric - Industrial Co., Ltd.
Renner , Otto, Boisselle & Sklar, LLP
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