Magnetic disc medium

Details Magnetic disc medium Magnetic disc medium

2006-09-19

2006-09-19

Resan, Stevan A. (Department: 1773)

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

C428S690000, C360S133000, C206S308300

Reexamination Certificate

active

07108903

ABSTRACT:
A magnetic disc medium comprising: a magnetic sheet in the form of a disk; a case encasing the magnetic sheet so as to be capable of rotating; and a nonwoven liner fastened on an inner face of the case so as to face the magnetic sheet, wherein the magnetic sheet comprises a support, a substantially nonmagnetic lower layer, and a magnetic layer containing hexagonal ferrite powder dispersed in a binder and having central plane average surface roughness of from 1 nm to 4 nm, and the liner comprises polyethylene terephthalate in an amount of 20% by weight or more.

REFERENCES:
patent: 5164239 (1992-11-01), Ozawa et al.
patent: 5179487 (1993-01-01), Niitsuma et al.
patent: 5455109 (1995-10-01), Atkinson et al.
patent: 5-20832 (1993-01-01), None
patent: 5-109061 (1993-04-01), None

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