| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an optical disk which has a larger capacity, high reliability and which is excellent in durability with respect to repeated recording of data information. <P>SOLUTION: The optical disk is characterized by including a substrate on which a plurality of grooves are formed and a recording layer which is provided on the substrate and which is formed of a phase-change material containing Bi, Ge and Te, each of the grooves is provided with a header section on which address information of the groove is recorded, the header section is formed by deflecting the grooves in the radial direction and the header sections of the respective grooves are arranged aligned in the radial direction and even when the address information of the predetermined groove is failed to be reproduced, the address information of the predetermined groove is specified from the address information of the adjoining groove. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
