Appeal No. 1997-0330
Application 08/493,758
Beckwith also teaches an acidic plating bath for
electro-depositing tin-containing salts (Example 2, col.
9), surfactants (col. 2, line 40), and a fluoride-
containing electrolyte. Beckwith's source of fluoride
is, however, not limited to acids. Salts (col. 4, lines
16-38), including "complex salts"(col. 4, line 25) of
- -2
fluoborates (i.e., BF ) and fluosilicates (i.e., SiF ),4 6
may also be used. Beckwith suggests that using these
types of complex salts is an equivalent alternative to
using the acid counterpart. Given this suggestion, to
one with ordinary skill in the art with Beckwith in hand,
it would have been prima facie obvious to substitute the
acid (e.g., HBF ) used in Kirman with a complex salt, as
4
claim 3 prescribes, and achieve the same electrolytic
result.
This decision contains a new ground of rejection
pursuant to 37 C.F.R. ' 1.196(b) (amended effective Dec.
1,
1997, by final rule notice, 62 Fed. Reg. 53,131, 53,197
(Oct. 10, 1997), 1203 Off. Gaz. Pat. & Trademark Office
12
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