Method of terminating lead filled capacitor

Details Method of terminating lead filled capacitor Method of terminating lead filled capacitor

1988-07-01

1989-11-21

Hall, Carl E.

Metal working

Electric condenser making

Solid dielectric type

29851, 264 61, 361304, 361305, 361321, H01G 430

Patent

active

048813087

ABSTRACT:
A method of manufacturing a ceramic capacitor of the lead filled type includes coating the ends of the ceramic monolith with a terminating paste incorporating oxidizable metal particles characterized in that the lead will not wet to oxides of the metals but will wet to unoxidized or lightly oxidized increments of the metals. The paste is fused in an oxidizing environment or is fused in an inert environment and thereafter heated in an oxidizing environment with the result that the metal increments adjacent the exterior of the fused coating are oxidized whereas the metal at the interior portions of the paste are unoxidized or only slightly oxidized. Upon metal injection, the lead will wet to the interior portions of the fused paste but will not wet to the exterior of the paste whereby injected chips may be readily separated and whereby the size of the chip is rendered predictable due to the absence of adherent lead.

REFERENCES:
patent: 3965552 (1976-06-01), Rutt
patent: 4241378 (1980-12-01), Dorrian
patent: 4652967 (1987-03-01), Sakabe et al.

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