Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Takahashi Akira0
Terashima Shigeo0
Yamaoka Hideyoshi0
Date of Patent
July 5, 2011
0Patent Application Number
100091550
Date Filed
April 26, 2000
0Patent Primary Examiner
Patent abstract
A small-sized, large-capacity optical disk is provided which is superior in portability. The optical disk has a diameter less than 64 mm and a thickness less than 0.8 mm. Tracks are formed with a pitch less than 0.6 μm, and the record area is divided into a plurality of zones alone the radium. The optical disk can store more than 650 MB of compressed data.
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