Appeal No. 96-1078
Application No. 07/960,887
20; claim 4). Based upon the teachings of Shiroishi and
Watanabe, the obviousness rejection of claims 1 through 11 is
reversed.
Turning to the new ground of rejection of claim 1,
Kobayashi discloses all of the perpendicular magnetic
recording apparatus of claim 1 except CoPt. The Abstract in
Kobayashi states that the magnetic recording medium and the
magnetic head (Figure 1) both use the same magnetic film that
has Fe as its main component. "The main magnetic pole 5 [of
the head] is magnetized by . . . coil 10 to generate a
perpendicular magnetic field . . . and record the signal in
the perpendicularly magnetizable film 4 of the magnetic
recording medium 1" (column 5, lines 2 through 6). "[A] thin
magnetic film . . . is used as the magnetic pole" of the
magnetic recording head (column 6, lines 55 through 57).
Tables 1 through 4 of Kobayashi clearly show that the
saturation magnetic flux density of the magnetic thin film is
not less than 19kG.
In the Abstract of the Hayashi Journal of Applied Physics
publication, it is noted that CoPt and CoPtB(O) alloy films
are preferred and have superior properties (e.g., coercivity
6
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