Appeal No. 1998-1658
Application 08/343,876
movement of the head relative to the tape. Shimizu '645 does not
describe the recording media.
Appellants argue that the magnetic head in Shimizu '645 has
a structure which is different from the recording heads recited
in the instant invention (Br9-10). It is argued that
Shimizu '645 shows metal thin films having low saturation
magnetic flux density provided on both sides of the head gap, and
subsequently, metal thin films having high saturation magnetic
flux density are provided on both thus formed metal thin films
having low magnetic flux density (Br9).
Unfortunately, the Examiner does not address Appellants'
argument that the head structure is different. Appellants err in
not addressing the Examiner's reliance on Shimizu '645, figure 8,
as showing high saturation magnetic flux density material 13a on
only one side of the gap (FR6). Appellants err in stating that
the high saturation flux density material is deposited on a low
saturation flux density material: the layers are deposited in the
opposite order. The material of the first thin film 13a has a
high saturation flux density (col. 4, lines 24-29) B S1 of 10000
gauss (col. 4, lines 46-49). The second thin film 17a deposited
on the first thin film 13a has a preferred saturation flux
density BS2 of less than 0.6BS2 (less than 6000) because the
preferred ratio BS2/BS1 is less than 0.6 (col. 7, lines 10-18).
It is known that the saturation flux density of ferrite is only
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