Recording medium, information recording device, and...

Dynamic information storage or retrieval – With servo positioning of transducer assembly over track... – Optical servo system

Reexamination Certificate

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C369S275400

Reexamination Certificate

active

07054239

ABSTRACT:
An information recording medium comprises a read-out track having a data region forming data bits for reproduced data and a servo pattern region forming servo bits for tracking control. The servo bits have a first groove that is deep in a direction perpendicular to both a length of the read-out track and a depth of the information recording medium, and a second groove that is deep in a direction opposite to the first groove and having a depth gradually increasing along the read-out track.

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