Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1980-06-13
1981-11-10
Hess, Bruce H.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
252514, 428209, 428210, 428434, 428469, 428471, 428472, B32B 1500, H01B 102, H01B 106
Patent
active
042998760
ABSTRACT:
A solderable conductor pattern is formed on a ceramic substrate. The material of the conductor pattern is made by dispersing gold and certain inorganic binders in an inert liquid vehicle composition. Limited variations in the ranges of the amounts of the material in the composition particularly the range in the amount of copper oxide in the binder produce good adhesion of the pattern to fired substrates and simultaneously provide strong solder joints between leads of electronic devices soldered with a lead-indium solder to pads of a pattern of such material after the pattern has been fired on a substrate without the necessity for physically or chemically cleaning the pads. The binders of the material comprise certain amounts of the crystalline materials, copper in the form of its oxides CuO or Cu.sub.2 O, cadmium in the form of CdO, lead in the form of PbF.sub.2, and the balance being a glass which also contains lead and some cadmium.
REFERENCES:
patent: 4004057 (1977-01-01), Hoffman et al.
Lam Kit M.
Mones Arthur H.
Neuhoff Donald
Hess Bruce H.
Holloway, Jr. W. W.
Honeywell Information Systems Inc.
Hughes Edward W.
Prasinos N.
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