Process for forming an electrically insulating seal between a me

Details Process for forming an electrically insulating seal between a me Process for forming an electrically insulating seal between a me

1976-11-19

1977-09-13

DiPalma, Victor A.

Metal working

Method of mechanical manufacture

Electrical device making

65 59B, 65 61, 174 5061, 174152GM, 429174, 429181, H01B 1726

Patent

active

040472922

ABSTRACT:
A metal body, for example, a cover for hermetically sealed electrochemical cells, is relatively flexible and electrically conductive. An aperture is provided within the body to receive an electrically insulating material, such as glass, which mounts a terminal or metal lead, for the cell. In the process for producing the seal, the body is positioned with the lead therein and a sealing glass is placed thereabout. The assembly is fired at a temperature high enough to achieve melting of said sealing glass and effecting a between the body, lead and glass to form a glass-to-metal seal. At least one surface of the lead is then ground to be flush with the glass and then the assembly is refired to heal cracks formed in the glass by the grinding operation.

REFERENCES:
patent: 2898668 (1959-08-01), Knott et al.
patent: 3083249 (1963-03-01), Belove
patent: 3225132 (1965-12-01), Baas et al.

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