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METHOD FOR MANUFACTURING OPTICAL DISK MASTER DISK, OPTICAL DISK MASTER DISK, OPTICAL DISK AND OPTICAL DISK MASTER DISK EXPOSURE DEVICE
METHOD FOR MANUFACTURING OPTICAL DISK MASTER DISK, OPTICAL DISK MASTER DISK, OPTICAL DISK AND OPTICAL DISK MASTER DISK EXPOSURE DEVICE
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机译:制造光学光盘母盘,光学光盘母盘,光学光盘和光学光盘母盘曝光装置的方法
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摘要
PROBLEM TO BE SOLVED: To manufacture an optical disk master disk in which the pit width is reduced while keeping a proper asymmetry value by adding a concave pulse to a recording signal when forming a pit having a prescribed length.;SOLUTION: A recording signal generating part 30 generates a recording signal in which the relation between the voltage Vp of the rising and falling of a pulse and at least a part of middle voltage Vm is made into VmVp. A modulation part 9 modulates recording light by using the recording signal generated by the recording signal generating part 30. A glass master disk on which a photoresist is applied is irradiated with recording light. In addition, the relation of VmVp is attained provided that the spot diameter w of the recording light used for the pattern exposure of a pit sequence is in the relation of w0.65 r with respect to the spot diameter r of reproducing light.;COPYRIGHT: (C)2002,JPO
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