Appeal No. 2000-0366
Application No. 08/477,957
recited range renders the strontium titanate as semiconductive
because the lanthanum acts as a donor dopant. McSweeney also shows
(column 1, lines 14-21) that strontium titanate and barium titanate
display similar characteristics. Furthermore, both of them are
known to be classified as perovskite materials, see Appellants’
disclosure at page 1 labeled as background of the invention. Thus,
contrary to Appellants’ assertions, Kaiser does show a capacitor
with two electrodes and a high dielectric constant material in
between, both electrodes being conductive materials. Miyasaka
explicitly teaches that the first electrode may be preferably
employed in the form of a substrate which has been doped with an
impurity instead of a metal electrode as in Kaiser. Furthermore,
McSweeney teaches that a conductive substrate can be prepared by
adding lanthanum dopant as a donor to strontium or barium titanate.
Therefore, an artisan, having the teachings of Miyasaka that a
substrate with an impurity as a dopant is desirable as an electrode
in Kaiser, and that the impurity as a dopant further is taught
by McSweeney to yield desirable results of having a conductive
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