Appeal No. 96-3614
Application 08/259,154
an insulation resistance sufficient to electrically insulate
said coil film in view of the absence of an insulating film
between said magnetic film and said electrically conductive
substrate." The Diepers device does not include a substrate-
insulating layer and thus satisfies the claim's requirement
that the magnetic film be directly formed on an electrically
conductive substrate. Specifically, the lower magnet leg 7,
consisting of a magnetic outer layer 15 and an adjacent
magnetic layer 21, is formed in a depression 13 in substrate 3
(col. 5, lines 11-38), which is electrically conductive (col.
5, lines 2-7).
The examiner describes the deficiencies of Diepers as
follows (Answer at 8): "Diepers does not expressly disclose
the establishment of an equipotential between the magnetic
film [which is] directly formed on the substrate [and the
substrate]. Diepers does not expressly show its coil film
being insulated by an organic insulating resinous film with
sufficient insulation resistance." Regarding the
equipotential limitation, the examiner argues that
one of ordinary skill in the art would have been
motivated to furnish the magnetic head of Diepers with an
equipotential established between the magnetic film and
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