Optical information recording medium

Details Optical information recording medium Optical information recording medium

2011-05-03

2011-05-03

Nguyen, Hoa T (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S277000, C428S064100

Reexamination Certificate

active

07936661

ABSTRACT:
Provided is an optical information recording medium that can be recorded with data with only a special recording apparatus and the recorded data can be read out with a general recording/reproducing apparatus. The optical information recording medium includes a disc-like light-transmissive substrate having a surface provided with a spiral groove WB having a wobble and a land LN between adjacent segments of the groove WB, a light-absorbing layer disposed on the surface of the light-transmissive substrate, and a light reflection layer disposed on the light-absorbing layer. The groove WB has a depth Ds of about 140 nm≦Ds≦155 nm, the light-absorbing layer has a recess with a depth Dd of about 95 nm≦Dd≦105 nm in the groove, and a push-pull signal before recording has a value of about 0.3 or less. The optical information recording medium may include an anti-illegal copy measure.

REFERENCES:
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patent: 2007/0070875 (2007-03-01), Mizukami
patent: 10-092016 (1998-04-01), None
patent: 2000-030257 (2000-01-01), None
patent: 2002-157740 (2002-05-01), None

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