Patent ID: 7666328

Claim:
A thick film composition for use in low temperature co-fired ceramic circuits comprising, based on weight percent total thick film composition: (a) 30-96 weight percent finely divided particles selected from noble metals, alloys of noble metals and mixtures thereof; (b) 0.2-10 weight percent of one or more refractory glass compositions with a specific viscosity (log n) in the range of 6-7.6 at the firing temperature of said circuit; and (c) 2-20 weight percent organic medium comprising ethyl cellulose with a specific ethoxyl content in the range of 45.0-51.5 and degree of substitution of ethoxyl groups per anhydroglucose unit in the range of 2.22-2.73, said composition optionally containing 0.1-5 weight percent of an additional inorganic binder selected from (i) metal oxides, (ii) precursors of metal oxides; (iii) non-oxide borides; (iv) non-oxide silicides; and (v) mixtures thereof.