Magnetic disk substrate and magnetic disk

Details Magnetic disk substrate and magnetic disk Magnetic disk substrate and magnetic disk

2006-01-31

2006-01-31

Resan, Stevan A. (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Magnetic recording media substrate

C428S847800

Reexamination Certificate

active

06991863

ABSTRACT:
The present invention relates to a magnetic disk substrate formed of a thermoplastic resin and a magnetic disk comprising a magnetic recording layer formed on the magnetic disk substrate. In the magnetic disk substrate of the invention, the amount of gases generated therefrom upon held at 90° C. for 1 hour is 100 μg/cm2or less, so that when scanned by a floating head, errors on recording and reading of information are remarkably reduced. Thus, the magnetic disk substrate can provide a magnetic disk having improved scan capability. The present invention also provides a process for manufacturing such a magnetic disk.

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