Process of making a ceramic lid for use in a hermetic seal packa

Details Process of making a ceramic lid for use in a hermetic seal packa Process of making a ceramic lid for use in a hermetic seal packa

1988-06-09

1989-05-23

Hearn, Brian E.

Fishing, trapping, and vermin destroying

437226, 357 80, 174 5051, 174 523, 361331, H01L 2100

Patent

active

048331023

ABSTRACT:
A sidebrazed ceramic package is provided with a closure seal that employs a high alumina ceramic lid that matches the composition of the package body. The lid is provided with a recess in the sealing face and the sealing face is provided with metallization that adheres to the ceramic and is wet by solder. The metallized ceramic lid is sealed to the metallization ring on the sidebrazed ceramic body by means of the conventional gold-tin solder. The resultant hermetic seal can be inspected by observing the solder fillet in the lid recess. Such a closure seal is fully hermetic and can readily survive repeated thermal cycling.

REFERENCES:
patent: 4291815 (1981-09-01), Gordon et al.

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