Appeal No. 1998-2948
Application 08/400,861
one of ordinary skill in the art for the reasons discussed,
supra.
Appellants argue that the only possible anodization
described in Kiyota is that specifically taught for the
particular aluminum alloys of Kiyota, which do not contain
rare earth elements (Br4) and that Kiyota suggests that anodic
oxidation is only useful for aluminum alloys with copper,
gold, boron, etc. (Br4).
We disagree with the conclusion that because Kiyota
teaches anodic oxidation with aluminum alloys not containing
rare earth elements, Kiyota suggests that anodic oxidation is
only useful for those aluminum alloys. Kiyota discloses that
the purposes of the anodic oxidation layer are to increase (1)
the chemical resistance of the conductor layer, and (2) the
adhesivity with an insulating layer formed on the wiring
layer. One of ordinary skill in the art would have been
motivated by this teaching to apply anodic oxidation to other
aluminum alloy conductors for the same purposes. There is no
suggestion that anodic oxidation is in any way limited to the
disclosed aluminum alloy conductors or won't work with other
aluminum alloy compositions.
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