Compositions – Electrically conductive or emissive compositions – Free metal containing
Patent
1988-12-02
1989-10-17
Barr, Josephine
Compositions
Electrically conductive or emissive compositions
Free metal containing
252518, 252520, 252521, 106113, 106118, 501 19, 501 73, 501 79, 501 69, 501 70, H01B 106
Patent
active
048745502
ABSTRACT:
Improved copper conductor inks useful in fabricating multilevel circuits are provided. The inks comprise copper powder, a devitrifying glass frit which does not begin to flow until the furnace temperature is above about 700.degree. C., and a suitable organic vehicle. Devitrifying glass frits with these properties include a zinc-calcium-aluminum-silicate glass frit, a zinc-magnesium-barium-aluminum-silicate glass frit, a zinc-magnesium-barium-aluminum-zirconium-phosphosilicate glass frit and mixtures thereof. The inks are advantageous in that they form copper conductor layers having excellent properties without the inclusion of traditional flux materials such as bismuth oxide.
REFERENCES:
patent: 4808770 (1989-02-01), Prabhu et al.
Conlon Edward J.
Hang Kenneth W.
Prabhu Ashok N.
Barr Josephine
Davis Jr. James C.
General Electric Company
Magee Jr. James
Montebello Mary A.
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