Information recording method using a vertical magnetic system

Details Information recording method using a vertical magnetic system Information recording method using a vertical magnetic system

2005-12-20

2005-12-20

Hudspeth, David (Department: 2651)

Dynamic magnetic information storage or retrieval

Record copying

Contact transfer

C360S077030, C369S013140

Reexamination Certificate

active

06977786

ABSTRACT:
In an information recording method of the present invention by carrying out recording data while carrying out tracking servo accurately, high density recording of signals at a good S/N can be carried out, and high density recording by a vertical magnetic recording system can be carried out. A magnetic disk comprises a magnetic recording layer, and the magnetic recording layer is magnetized in advance such that magnetized regions A and B having different magnetization directions are formed. At a time of recording data, vertical magnetic recording is carried out by a magnetic head while carrying out accurate tracking servo by optically tracking by a magneto-optical effect utilizing a difference in the magnetization directions of the magnetized regions A and B. Therefore, high-density recording at a good S/N is possible.

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