Ceramic lid hermetic seal package structure

Details Ceramic lid hermetic seal package structure Ceramic lid hermetic seal package structure

1987-03-17

1988-09-06

Kittle, John E.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428210, 428428, 428689, 437217, 228123, 220359, B32B 300, B32B 900, B65D 4100

Patent

active

047692723

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 insepcted 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: 4352449 (1982-10-01), Hall et al.
patent: 4400870 (1983-08-01), Islam
patent: 4640436 (1987-02-01), Miyoshi et al.

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