OPTICAL DISK AND OPTICAL DISK DEVICE
PROBLEM TO BE SOLVED: To provide an optical disk and an optical disk device wherein access time can be shortened. SOLUTION: Information layers L1, L2 and L3 having a plurality of optical disk specifications different from each other are provided on an optical disk 1 and laminated in the thickness di...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
28.09.2006
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Subjects | |
Online Access | Get full text |
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Summary: | PROBLEM TO BE SOLVED: To provide an optical disk and an optical disk device wherein access time can be shortened. SOLUTION: Information layers L1, L2 and L3 having a plurality of optical disk specifications different from each other are provided on an optical disk 1 and laminated in the thickness direction of the optical disk 1. The information layers L1, L2 and L3 are disposed in positions where distances from the surface to the information layers are 0.1 mm, 0.6 mm and 1.2 mm, respectively. The information layers L1, L2 and L3 satisfy specifications of a BD, a DVD and a CD, respectively, and the information layer L1 has the highest recording density and the information layer L3 has the lowest recording density. COPYRIGHT: (C)2006,JPO&NCIPI |
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Bibliography: | Application Number: JP20050043131 |