Optical data recording medium and manufacturing method for...

Details Optical data recording medium and manufacturing method for... Optical data recording medium and manufacturing method for...

2006-06-20

2006-06-20

Watko, Julie Anne (Department: 2653)

Dynamic optical information storage or retrieval

Optical storage medium structure

Disk protection

Reexamination Certificate

active

07065776

ABSTRACT:
A disc-shaped optical data recording medium has a signal recording layer for reading and/or writing data using light, and a 10 μm to 200 μm thick transparent protective layer disposed over the signal recording layer. The optical data recording medium includes a protrusion projecting from a surface of the transparent protective layer on a light-incidence surface side to which light is emitted to the signal recording layer. The protrusion is disposed in an area between a center hole and a clamping area where the optical data recording medium is held when reading and/or writing data in the signal recording layer.

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IBM TDB Jan. 1991, v. 33, No. 8, p. 361.

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