Compositions – Electrically conductive or emissive compositions – Metal compound containing
Patent
1991-02-12
1992-08-18
Bell, Mark L.
Compositions
Electrically conductive or emissive compositions
Metal compound containing
252512, H01B 106
Patent
active
051397048
ABSTRACT:
A fluxless solder for application to metal surfaces which include contaminants such as metal oxides. The fluxless solder includes a reducing agent which reacts with interfering metal oxides to form essentially inert compounds which require no further cleaning. Reducing agents, such as lithium, calcium, strontium and cesium are disclosed for use in lead-tin solders, in amounts ranging from about 0.5 to 10 atom percent. Various methods for forming the fluxless solder are also disclosed.
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patent: 4673532 (1987-06-01), Barajas et al.
patent: 4728023 (1988-03-01), Barajas et al.
patent: 4937006 (1990-06-01), Bickford et al.
patent: 5076487 (1991-12-01), Bandyopadhyay
Duane Francis O.
Elias William E.
Holland Wilson A.
Bell Mark L.
Denson-Low W. K.
Gallo Chris
Hughes Aircraft Company
Lachman M. E.
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