Copper conductor compositions containing copper oxide and Bi.sub.2 O.sub.3
First Claim
1. A copper conductor composition fireable in a neutral atmosphere to produce a solderable, adherent conductor pattern on a dielectric substrate, said composition comprising finely divided inorganic particles dispersed in an inert liquid vehicle, said inorganic particles consisting essentially of, by weight,(a) 86-97% copper,(b) 1-7% copper oxide,(c) 1-7% glass comprising 75% or more of Bi2 O3,the total weight of (b) and (c) being in the range 3-14%, provided that where the total weight of (b) and (c) is 3%, it is of 2% (b) and 1% (c).
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Accused Products
Abstract
Compositions useful for making electrical conductor patterns on a nonconductive (dielectric) substrate, the compositions comprising certain proportions of finely divided copper, copper oxide and glass powders, dispersed in a vehicle. The compositions may be printed on a substrate and fired in a neutral atmosphere to produce conductor patterns adherent to the substrate.
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Citations
13 Claims
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1. A copper conductor composition fireable in a neutral atmosphere to produce a solderable, adherent conductor pattern on a dielectric substrate, said composition comprising finely divided inorganic particles dispersed in an inert liquid vehicle, said inorganic particles consisting essentially of, by weight,
(a) 86-97% copper, (b) 1-7% copper oxide, (c) 1-7% glass comprising 75% or more of Bi2 O3, the total weight of (b) and (c) being in the range 3-14%, provided that where the total weight of (b) and (c) is 3%, it is of 2% (b) and 1% (c).
Specification