Appeal No. 96-0366
Application No. 07/933,893
Claim 1 is representative and is reproduced below:
1. A hard magnetic disk for use with a magnetic head
that floats by rotation of the magnetic disk during
read/write and that starts and stops in contact with the
magnetic disk,
comprising a substrate having a surface with a magnetic film
formed on said surface and having surface micro projections
the surface micro projections having heights from at least 3
nm to less than 90 nm with respect to a projection height
center line and having a density of greater than 110 to less
than 80,000 pcs/mm , wherein the surface of the substrate has2
a bearing ratio of 0.1% to 10% at a depth of 5nm from a
highest peak of the surface micro projections.
The references of record relied upon by the examiner are:
Suzuki et al. (Suzuki‘451) 4,514,451 Apr.
30, 1985
Suzuki et al. (Suzuki‘618) 4,540,618 Sep. 10,
1985
Katoh et al. (Katoh ‘319) 4,670,319 June 2,
1987
Kanesaki et al. (Kanesaki) 4,680,217 July 14,
1987
Fukada et al. (Fukada) 4,698,251 Oct. 6,
1987
Katoh et al. (Katoh ‘412) 4,720,412 Jan. 19,
1988
Sonoda et al. (Sonoda) 4,762,742 Aug. 9,
1988
Sony 2 Japan 62-80825 Apr. 14,
1987
Hitachi Japan 63-156650 June 29, 1988
2Our consideration of the Sony and Hitachi publications
is based on the respective English translations of record.
3
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