Compositions – Electrically conductive or emissive compositions – Free metal containing
Patent
1975-06-23
1976-06-01
Padgett, Benjamin R.
Compositions
Electrically conductive or emissive compositions
Free metal containing
106 1, H01B 102
Patent
active
039607771
ABSTRACT:
This invention relates to compositions which are dispersions of certain proportions of gold and inorganic binder in an inert liquid vehicle, useful in the electronics art for producing conductor patterns adherent to substrates. Even small amounts of the binder are effective in obtaining excellent adhesion to ceramic substrates. The binder comprises, by weight, (a) 4-23% CuO, (b) 13-36% of CdO or mixtures thereof with CaO, there being at least 13% CdO in the binder, (c) 30-60% B.sub.2 O.sub.3, SiO.sub.2, P.sub.2 O.sub.5, V.sub.2 O.sub.5, Al.sub.2 O.sub.3, and/or GeO.sub.2, provided that at least 5% B.sub.2 O.sub.3, SiO.sub.2, P.sub.2 O.sub.5, and/or V.sub.2 O.sub.5 is present in the binder, and (d) 0-20% PbO, and/or Bi.sub.2 O.sub.3. The amount of binder in the compositions is related to the amount of CuO in the binder as set forth herein. Optionally certain amounts of crystalline fluxes (PbF.sub.2 and/or LiF) may be present.
REFERENCES:
patent: 3293501 (1966-12-01), Martin
patent: 3350341 (1967-10-01), Short
patent: 3450545 (1969-06-01), Ballard et al.
patent: 3776769 (1973-12-01), Buck
patent: 3799890 (1974-03-01), Smith
patent: 3799891 (1974-03-01), Smith
E. I. Du Pont de Nemours and Company
Padgett Benjamin R.
Parr E. Suzanne
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