| 摘要 |
PURPOSE:To realize a device for reproducing/recording the optical disk with a simple mechanism by obtaining the optical disk capable of recording data for sales of game software, etc., by a system which can make mass production and additional recording of fresh information. CONSTITUTION:Guide grooves for tracking are formed in a fresh data region 12 on the inner peripheral side of an original data region 11 recorded with the data for sales as pits and a reflection layer 10b deposited on the disk surface is formed of a material selected from Te, Se, Sn, Zn, Bi, In and their combinations at 200 to 1000Angstrom width. A laser power is further increased at the time of recording the fresh data in the fresh data region 12 of the optical disk 10 and further, the rotating line speed of the disk is changed to 1/2 to 1/5 the rotating line speed of the disk at the time of reproducing the original data region 11. |
