Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2007-05-22
2007-05-22
Edun, Muhammad (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
C369S275100, C369S283000
Reexamination Certificate
active
10515191
ABSTRACT:
With the disc-shaped recording medium, or the disc manufacturing method according to the present invention, for both the single-layer disc and the multi-layer disc, a recording layer L0, which is to be the first layer, is at the same distance, along the direction of disc thickness, from the surface of the cover layer CVLs on which falls the laser light. For the multi-layer disc, the second layer L1and the following layer(s) are formed at the locations which are closer to the cover layer CVLs than the first layer L0. Management information may be recorded by mobbling grooves, each layermay have tert areas, defect information, a replacement area. Thus, it is possible to improve compatibility, reliability and accessibility between a single-layer disc and a multi-layer disc. The spherical aberration for the recording/reproducing light may be controlled with respect to the selected layer.
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Borg Hermanus Johannes
Ishida Takashi
Kadowaki Shin-ichi
Kobayashi Shoei
Schep Cornelis Marinus
Edun Muhammad
Koninklijke Philips Electronics , N.V.
Matsushita Electric - Industrial Co., Ltd.
Oblon & Spivak, McClelland, Maier & Neustadt P.C.
Sony Corporation
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