Appeal No. 2002-1914
Application 09/247,889
computers, and word processors, wherein the magnetic heads
perform data recording and reproduction while traveling and
flying at an infinitesimal gap over the flat surface of a
recording medium. More particularly, appellant notes on page 6
of the specification that
[t]he purpose of the present invention is to provide a
method in which, by adding roundness to the angled parts of
the peripheral parts of the magnetic head slider, highly
durable and reliable magnetic heads may be manufactured
which prevent adhesion to the recording medium surface,
improve resistance to disk shocks, and enable stable flying
characteristics even for smaller magnetic heads and lower
flying heights.
In describing the method of manufacture in the present
application, appellant indicates that photoresist applied to the
air bearing surface (ABS) of the magnetic head slider causes
rounding at the slider peripheral part (2a in Fig. 2B) due to its
surface tension, and when this is baked (Fig. 2C), the film
thickness of the photoresist at said peripheral part becomes
rounded and thin facing the outside edges; therefore this curved
shape (21a of Fig. 2D) is transferred to the ABS of the slider by
uniform dry etching. Independent claim 1 is representative of
the subject matter on appeal and a copy of that claim can be
found in the Appendix to appellant’s brief.
2
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