Appeal No. 1996-3811
Application 08/188,078
The Examiner stated in the Final Rejection "that creating
the seedlayer from a non-magnetic material would prevent the
seedlayer from acting like an additional magnetic pole, thus
ensuring that the readback waveform is not perturbed" (FR6),
which would be apparent whether or not a "wedge" exist.
The Examiner's reasoning presents a factual question of
what Frey disclosed to one of ordinary skill in the art.
Motivation is a question of fact. Frey discloses (col. 5,
line 66, to col. 6, line 2): "[P]ortion 213 of the seed
layer (under wedge 215A) will extend out to the air bearing
surface of the finished head and will act as a third pole if
the layer is magnetic. This would perturb the readback
waveform." We agree with Appellants that this teaches
making the seedlayer from non-magnetic material only because
there is a wedge (gap) between the seedlayer and the pole.
If the wedge were not present, even a magnetic seedlayer
could not form a third pole as stated by the Examiner
because the seedlayer would form part of the pole as in a
conventional head. There is no analogous separation between
the seedlayers and the magnetic core pieces in Kaminaka that
would require the use of a non-magnetic seedlayer.
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