Appeal No. 1996-3811
Application 08/188,078
non-magnetic seedlayer and wedge. However, we agree with
Appellants that Frey does not suggest modifying the
non-magnetic seedlayer for the upper pole piece.
Appellants argue (Br5-7, Sec B) that Frey's only
purpose for providing a non-magnetic seedlayer is to prevent
the portion 213 of the seedlayer, which is separated from
pole 222 by a wedge of non-magnetic material 215A, from
forming a third pole and, thus, Frey provides no reason to
make Kaminaka's seedlayers non-magnetic because there is no
danger of creating a third pole. "More particularly, since
both of Kaminaka's magnetic seedlayers are contiguous [to]
their respective poles, there is no danger that either might
act as a third pole separated from the bottom pole by
insulating material." (Br6.)
The Examiner responds (EA7-8):
The Examiner disagrees - by adding a third magnetic
body at the air bearing surface, a third pole would be
formed regardless of the separation between the
magnetic bodies. The "perturbing" effect may be
decidedly less pronounced if a wedge is not included
(i.e. if the magnetic bodies are close together or even
touching), but this does not mean that adding a
magnetic body will not perturb the waveform as taught
in Frey et al.
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