Appeal No. 2002-0834
Application 09/275,386
entire sentence from Ishisuka which states “[i]t is preferred to
add an additive such as a stabilizer for hydrogen peroxide, a
dissolution accelerator for copper, etc. to this hydrogen
peroxide/sulfuric acid etching solution. Examples of such
additives include monohydric alcohols . . .; glycol ethers such
as polyethylene glycol; . . . .”
If we were to find, arguendo, that the above-mentioned
disclosure of Ishizuka teaches that polyethylene glycol is a
stabilizer for hydrogen peroxide, the examiner does not provide
reasons why one of ordinary skill in the art would have been
motivated to add this particular stabilizer (the polyethylene
glycol of Ishizuka), in addition to the benzotriazole of Bohnen,
when one of ordinary skill in the art has already added the
benzotriazole as the stabilizer for hydrogen peroxide from the
teachings of Bohnen.
If we were to find, arguendo, that the disclosure at lines
40-54 in column 7 of Ishizuka is a teaching that polyethylene
glycol is useful as a dissolution accelerator for copper, the
examiner has not explained why one of ordinary skill in the art
would have been motivated to have used Ishizuka’s polyethylene
glycol in the composition of Johnson, especially in view of the
fact that the composition in Johnson involves a
cleaner/deoxidizer for aluminum rather than for a metal such as
copper and polypropylene glycol, not polyethylene glycol.
Also, given that the teaching found at lines 40-54 in column
7 of Ishizuka is uncertain, we determine that insufficient
evidence exists to support a prima facie case.
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