Optical recording or reproducing apparatus for data from an...

Details Optical recording or reproducing apparatus for data from an... Optical recording or reproducing apparatus for data from an...

G - Physics

11

B

G11B 7/0037 (2006.01) G11B 7/24 (2006.01)

Patent

CA 2491189

An optical disc is manufactured under a uniform condition by forming grooves and lands on the entire surface of the disc. The optical disc is configured to obtain a reliable reproduction signal, and the grooves and lands are formed on a lead- in area, a user data area and a lead-out area of the optical disc. Since the same manufacturing condition can be adopted in mastering discs, the yield can be enhanced and the manufacturing cost can be reduced.

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