Appeal No. 1996-3811
Application 08/188,078
core piece (upper magnetic core 41), and a gap comprising a
non-magnetic material sandwiched between a portion of the
core bottom piece and the second non-magnetic seedlayer
(non-magnetic insulating layer 37). The Examiner finds the
following differences between Kaminaka and the claimed
subject matter (Final Rejection, page 3): "Kaminaka et al
does not (i) explicitly show that the seedlayers are
non-magnetic, or (ii) teach that the non-magnetic gap is of
the same composition as the seedlayer." The Examiner finds
that figure 7 of Frey discloses a thin film head having a
non-magnetic seedlayer 212 on which pole 222 is deposited.
The Examiner concludes that it would have been obvious to
make the seedlayers of Kaminaka from a non-magnetic material
as shown in Frey "to prevent the seedlayer from acting like
an additional (third) magnetic pole, thus ensuring that the
readback waveform is not perturbed (see Frey et al:
column 5, line 63 - column 6, line 2)" (Final Rejection,
pages 4-5). The Examiner also concludes that it would have
been obvious to make the non-magnetic gap of the head in
Kaminaka to have the same composition as the seedlayer "to
reduce the number of materials required to produce the head
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