Appeal No. 1997-3473
Application No. 08/331,684
(14 in Figure 5). Thus, the top pole piece 44 is lower than
the top surface of photoresist layer 66, which allows the
formation of top pole piece 44 with well defined edges with no
over plate.
Representative independent claim 1 is reproduced as
follows:
1. A thin film magnetic head comprising:
a bottom magnetic pole piece having a paddle and a
tip region;
an insulation layer on the bottom magnetic pole
piece;
a cavity layer having a predetermined thickness on
the insulation layer, the cavity layer containing an aperture
defining at least a portion of a paddle region for a top
magnetic pole piece on the insulation layer; and
a top magnetic pole piece on the insulation layer
having a paddle region having a shape at least partially
defined by the aperture of the cavity layer and having a tip
region, the top magnetic pole piece having a height at least
partially defined by the thickness of the cavity layer.
The reference relied on by the Examiner is as follows:
4
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