Magnetic recording and reproduction method

Details Magnetic recording and reproduction method Magnetic recording and reproduction method

2006-08-15

2006-08-15

Young, Wayne (Department: 2651)

Dynamic magnetic information storage or retrieval

Record medium

Disk

C360S055000, C360S235200, C360S235300, C360S059000, C428S831200

Reexamination Certificate

active

07092210

ABSTRACT:
A magnetic recording and reproduction method comprising recording or reproducing a track of a rotating magnetic disk by means of a magnetic head, wherein the magnetic disk comprises a support and a magnetic layer containing ferromagnetic powder and a binder; the track has a breadth of 2 μm or less; and a frictional force between the magnetic layer and the magnetic head at innermost peripheral area of a recording region of the magnetic disk is 30 mN or less, a frictional force between the magnetic layer and a magnetic head at outermost peripheral area of a recording region of the magnetic disk is 20 mN or less, and a ratio of the frictional force at the innermost peripheral area to the frictional force at the outermost peripheral area is from 1.0 to 4.0.

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