Back to results
US 6,889,381 B2Granted
Optical recording medium and method of manufacturing the same
AssigneeSony Corporation
InventorsMinoru Kikuchi, Jun Nakano
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeSony Corporation
InventorsMinoru Kikuchi, Jun Nakano
Estimating the term…
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.
An optical recording medium having an information signal area on which an information signal can be recorded and/or reproduced, said medium comprising:
An optical recording medium having an information signal area on which an information signal can be recorded and/or reproduced, said medium comprising:
Dependencies are inferred from the claim text.