发明名称 |
Information recording medium, information recording and reproducing method and manufacturing method of information recording medium |
摘要 |
There are provided an information recording medium which permits accurate tracking servo, and a method for recording and reproducing for an information recording medium which allows recording and reproducing of a signal at a favorable S/N by carrying out at least one of information recording and information reproduction while accurately performing tracking servo. A magneto-optic disk includes a magnetic recording layer for magnetically recording information. The magnetic recording layer is in advance magnetized for concentrically or spirally around the center of the disk in such a manner that magnetized regions are disposed such that adjacent regions are magnetized in different directions and alternately arranged in the radial direction of the disk. Accordingly, tracking can be continuously performed and accurate tracking servo can also be performed.
|
申请公布号 |
US2002081461(A1) |
申请公布日期 |
2002.06.27 |
申请号 |
US20010023832 |
申请日期 |
2001.12.21 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
NISHIKAWA MASAKAZU;USUKI KAZUYUKI;USAMI YOSHIHISA;NAGAO MAKOTO |
分类号 |
G11B11/10;G11B5/55;G11B5/596;G11B5/82;G11B5/86;G11B11/105;(IPC1-7):G11B5/82 |
主分类号 |
G11B11/10 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|