| 摘要 |
PURPOSE:To provide the optical disk for land recording which allows to simplify a process and allows to improve a yield and disk performance by specifying both of the depth of address pits and the depth of grooves for tracking of an optical head to lambda/4n2 at which the modulation degree of the prepits can be taken large. CONSTITUTION:The depths of the address pits 2 and the grooves 1 for tracking are set at lambda/4n2 and the relation between the bit width W1 and the groove width W2 is set at W1>W2. |
