Appeal No. 1997-2691
Application 08/496,849
On page 6 of the answer, the Examiner provides the
following rationale: one of ordinary skill in the art at the
time the invention was made would have been motivated to use
the Pellegrini guard ring to prevent current leakage in the
Yamaka Schottky barrier infrared photovoltaic detector. We
note that the Appellants have not argued that this is an
improper rationale. Upon our review of the references, we
find that one of ordinary skill in the art would have reason
to combine Pellegrini's guard rails so as to prevent current
leakage as disclosed and suggested by Pellegrini in col. 4,
lines 25-27, with the Yamaka's Schottky barrier infrared
photovoltaic detector.
On page 4 of the brief, Appellants argue that neither
Yamaka nor Pellegrini teaches that SiGe intermediate layer has
a Ge concentration selected from a range of 1% to 40%. The
Examiner responds to this argument on page 7 of the answer
stating that Yamaka discloses that the Ge concentration in the
SiGe layer is a concentration of 30%.
We find in col. 3, lines 4-61, that Yamaka teaches that
the SiGe intermediate layer has a Ge concentration of 30%.
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