| 摘要 |
According to this invention, a disc-like information storage medium has a concentric management information area and a concentric data area. The management information area includes a plurality of grooves aligned in a radial direction, a dye material applied to the plurality of grooves, and a plurality of bar-like patterns formed in a radial direction crossing the plurality of grooves and aligned in a circumferential direction. The data area includes a plurality of grooves aligned in the radial direction, and a dye material applied to the plurality of grooves. The plurality of bar-like patterns aligned in the circumferential direction include management information.
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