Appeal No. 96-3893
Application 08/063,302
minimized by applying an auxiliary film of soft magnetic material
to a surface other than the front surface, which includes the
gap. In appellants' Figure 1A, an auxiliary film 19 is applied
to the back surface of the magnetic head. Figure 4 shows an
auxiliary film 21 applied to a side surface. The auxiliary film
may be made of a Ni-Fe series alloy and a nitrogen material
(e.g., a Fe-Al-Si-N film) or can be constructed of a multi-layer
film such as an Fe-Si/Ni-Fe film (p. 12, lines 16-24).
Claim 1, which is the broadest of the rejected claims
(claim 15 is the only other independent claim), reads as follows:
1. A thin film type magnetic head comprising:
a magnetic head assembly including first and
second halves each having a magnetic core made of a
metallic magnetic material and interposed between two
mon-magnetic bases, said first and second halves being
joined to each other to form a magnetic gap
therebetween and form a first surface including said
magnetic gap and coming into contact with a recording
medium, said magnetic cores of said first and second
halves being substantially positioned along the same
plane; and
an auxiliary film made of a soft magnetic
material, said auxiliary film being disposed on a
second surface formed on said magnetic head assembly
different from said first surface to magnetically
connect with the magnetic cores of said first and
second halves, said auxiliary film being so formed as
to provide the product of its relative magnetic
permeability and its thickness to be above 3000.
The following references are relied on by the examiner:
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