Appeal 2007-2256
Application 10/903,064
According to Appellants, the invention is directed to a magnetic thin
film disk with a circumferentially textured glass substrate, a layer of CrTi
deposited on the substrate, a seed layer of RuAl over the layer of CrTi where
the seed layer has a B2 crystallographic structure, an underlayer over the
seed layer, and at least one magnetic layer with an Mrt orientation ratio
greater than one and a crystallographic orientation with c-axis in-plane for
longitudinal recording (Br. 5). Independent claim 1 is illustrative of the
invention and a copy of this claim is reproduced below:
1. A magnetic thin film disk comprising:
a circumferentially textured glass substrate structure;
a layer of CrTi deposited on the substrate;
a seed layer of RuA1 with a B2 crystallographic structure over the
layer or CrTi;
an underlayer over the seed layer; and
at least one magnetic layer over the underlayer, the magnetic layer
having an Mrt orientation ratio greater than one and having a
crystallographic orientation with c-axis in-plane for longitudinal recording.
The Examiner has relied on the following prior art references as
evidence of obviousness:
Shimizu US 2003/0091868 A1 May 15, 2003
Lee US 2003/0134153 A1 Jul. 17, 2003
ISSUES ON APPEAL
Claims 1-7 stand rejected under 35 U.S.C. § 103(a) as unpatentable
over Lee in view of Shimizu (Answer 3).
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