Optical recording medium and method of manufacturing the same

Details Optical recording medium and method of manufacturing the same Optical recording medium and method of manufacturing the same

2005-05-03

2005-05-03

Klimowicz, William J. (Department: 2652)

Dynamic optical information storage or retrieval

Optical storage medium structure

C369S282000, C369S283000, C369S286000

Reexamination Certificate

active

06889381

ABSTRACT:
There is provided an optical recording medium, in which a light transmitting layer is formed on a disc substrate, having less deflection and being excellent in recording/reproducing properties. In an optical disc, an information signal area on which an information signal can be recorded and/or reproduced is formed on a major surface of a disc substrate thereof; a light transmitting layer which can transmit a laser beam used in a process for recording and/or reproducing the information signal is formed on a side on which the information signal area is present; and a clamp reference plane is arranged on a major surface of the light transmitting layer in a clamp region. If the optical disc is clamped by a chucking unit of a drive, it is clamped by making the clamp reference plane on the major surface of the light transmitting layer contact with a mounting surface of a table for mounting the disc, and making a magnetic metal plate contact with the major surface of the disc substrate, and then sandwiching the optical disc between.

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