Appeal No. 1997-0678
Application 08/406,768
DECISION ON APPEAL
This is a decision on appeal under 35 U.S.C. § 134 from
the final rejection of claims 11 and 13.
We reverse.
BACKGROUND
The invention relates to a magnetic disk and a magnetic
disk apparatus using the magnetic disk. A conventional
magnetic disk apparatus uses a disk with a flat surface and a
head with a crown-shaped surface to prevent damage due to
contact between a head positioned in a start-stop area on the
disk surface and the disk surface when the magnetic disk
starts to rotate. It is difficult to form the crown-shaped
surface because of the high hardness of the head. The
invention uses a radial downslope on the disk from an inner
radius to an outer radius which provides a virtual crown on
the disk. The specification discloses that the start-stop
area is given a radial downslope "to form the head positioned
to the start-stop area into a virtual crown shape so that when
the magnetic disk starts to rotate, the head can rapidly take
off from the start-stop area in order to prevent deterioration
from being caused on the disk surface due to contact between
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