Multi-stack optical data storage medium and use of such medium

Details Multi-stack optical data storage medium and use of such medium Multi-stack optical data storage medium and use of such medium

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

07360228

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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