Dynamic optical information storage or retrieval – Optical storage medium structure
Reexamination Certificate
2008-04-15
2008-04-15
Klimowicz, William J. (Department: 2627)
Dynamic optical information storage or retrieval
Optical storage medium structure
C369S275100, C369S275400, C428S064400, C428S064900
Reexamination Certificate
active
10525578
ABSTRACT:
A multi-stack optical data storage medium, for recording using a focused radiation beam having a wavelength λ and entering through an entrance face of the medium, has a first substrate having a first guide groove formed therein, and a first recording stack including a recordable type recording layer having a thickness dL0Gin the groove and a thickness dL0Ladjacent the groove. A second substrate has a second guide groove formed therein, and a second recording stack including a recordable type recording layer having a thickness dL1Gin the groove and a thickness dL1Ladjacent the groove. The second recording stack is at a position closer to the entrance face than the first recording stack. The depth of the first guide groove is smaller than0.15λ and dL0Lis substantially equal to or larger than dL1G.
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Martens Hubert Cecile Francois
Van Den Oetelaar Ronald Joseph Antonius
Klimowicz William J.
Koninklijke Philips Electronics N. V.
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