Appeal No. 1997-3473
Application No. 08/331,684
DECISION ON APPEAL
This is a decision on appeal from the final rejection of
claims 1 through 14. Claims 15 through 24 have been withdrawn
from consideration as being directed to a non-elected
invention. Appellants’invention relates to a thin film
magnetic head. Looking at prior art Figure 1, thin film
magnetic head 10 has a core 12 having top pole piece 14,
bottom pole piece 16, pole center 30, coil windings 18 and gap
24. The top pole piece 14 includes top pole paddle 21 and top
pole tip 20. Bottom pole piece 16 includes bottom pole paddle
23 and bottom pole tip 22. Pole center 30 joins top and
bottom pole pieces 14 and 16 at a location remote from gap 24
to complete a magnetic circuit. A magnetic storage medium
(not shown) may be placed near gap 24 such that information
may be written on or read from the medium.
As shown in prior art Figure 3, insulation layers 28, 29,
and 32, as well as coil windings 18, are located over bottom
pole paddle 23 and do not extend out over bottom pole tip 22.
Because there is a buildup of materials over bottom pole
2
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