Optical recording medium, optical recording medium...

Details Optical recording medium, optical recording medium... Optical recording medium, optical recording medium...

2004-03-16

2010-10-05

Negrón, Daniell L (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

Reexamination Certificate

active

07808881

ABSTRACT:
An optical recording medium includes a main-information area in which a metal reflection film is formed on a substrate where a row of pits is formed as main data, and a sub-information area in which is recorded medium identification information, which is used to identify the optical recording medium individually, by removing the metal reflection film partially and forming a plurality of reflection-film removed areas. Information is reproduced by irradiating the metal reflection film with a beam of light. In the sub-information area, a row of pits or a guide groove is formed on the substrate, and a track pitch of the row of pits or the guide groove is at least 0.24 μm wide and at most 0.45 μm wide.

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Office Action issued Aug. 5, 2009 in corresponding Canadian Application No. 2,477,869.

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