Appeal No. 2006-0369 Παγε 10
Application No. 10/225,395
Representative claim 27 requires an article useful in
forming a circuit material that includes:
(1) a copper foil; and
(2) an adhesion promoting layer including an ethylene-propylene
diene monomer elastomer and a cross-linking agent that excludes
sulfur.
Appellants do not dispute the examiner’s determination
(answer, page 6) that Urban discloses/suggests employing an
ethylene-propylene diene monomer (EPDM) between a copper foil and
a circuit substrate material (for example, a layer of glass
cloth, unidirectional glass reinforcement, or paper) in forming a
circuit assembly. Rather, appellants focus their arguments on
the sulfur free cross-linking agent requirement of the rejected
claims. Representative claim 27 positively requires the
inclusion of “a cross-linking agent that does not contain
sulfur.”
Concerning that argued claim limitation, the examiner turns
to Valaitis for a teaching of employing peroxide cross-linking
agents in the radiation curing of EPDM to reduce the amount of
radiation required for curing. In this regard, the examiner
maintains that one of ordinary skill in the art would have been
led to employ the peroxide cross-linking agents taught by
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