Information recording medium, and apparatuses for...

Details Information recording medium, and apparatuses for... Information recording medium, and apparatuses for...

2005-10-13

2009-06-09

Bernatz, Kevin M (Department: 1794)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

C428S848300, C428S064200, C428S064400, C369S013550

Reexamination Certificate

active

07544428

ABSTRACT:
An information recording medium comprises a substrate, a second recording layer, a second light transmitting layer, a first recording layer for recording different information from that to be recorded in the second recording layer, and a first light transmitting layer. The second recording layer is formed with a continuous second microscopic pattern of grooves. The first recording layer is formed with a continuous first microscopic pattern of grooves that is different from the second microscopic pattern. Both sidewalls of raised portions of the first and second microscopic patterns are formed with wobbling so as to be parallel with each other. Auxiliary information and a reference clock is recorded on these sidewalls alternately and continuously.

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Tatsuya Narahara et al., “Optical Disc System for Digital Video Recording,” Part of the Joint International Symposium on Optical Memory and Optical Data Storage, Koloa, Hawaii, Jul. 1999, SPIE vol. 3864.

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