Appeal No. 96-3614
Application 08/259,154
Diepers's coil-insulating varnish material with an organic
resin having the claimed insulation resistance, the examiner
(Answer at 9-10) cites Hirai, which discloses a thin film
magnetic head
employing an organic insulating resin 15 (i.e., PIQ, or
polyimide isoindroquinazolinedione) to insulate the coil
winding 16 (col. 4, lines 47-56). We note that the examiner's
reliance on Hirai for this teaching replaces his earlier
taking of "official notice" that organic insulating films were
old and well known to one of ordinary skill in the art (Final
Office action at 8, 10, and 11). We agree with the examiner
that it would have been obvious in view of Hirai to make
Diepers' coil-insulating material from PIQ rather than
varnish. Appellants have not argued, let alone demonstrated,
that one skilled in the art would have considered PIQ to be
less suitable than varnish for insulating the coil winding 18
in the Diepers device. Instead, Appellants simply argue that
"neither Schwarz et al[.] nor Diepers contemplated the
formation of a magnetic film on an electrically conductive
substrate in conjunction with the organic insulating resinous
film of a high resistance to compensate for the reduced
- 14 -
Page: Previous 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 Next
Last modified: November 3, 2007