Glass/ceramic sealing system

Details Glass/ceramic sealing system Glass/ceramic sealing system

1988-09-02

1991-09-10

Bell, Mark L.

Compositions: ceramic

Ceramic compositions

Glass compositions, compositions containing glass other than...

501 5, 501 22, 501 26, 501 60, 501 61, 501 62, 501 63, 501 65, 501 66, 501 67, 501 68, 501 69, 501 72, C03C 802, C03C 1004, C03C 2118, C03C 3078

Patent

active

050473719

ABSTRACT:
The present invention relates to a glass/ceramic sealing system. A sealing glass having a coefficient of thermal expansion in excess of 160.times.10.sup.-7 in/in/.degree. C. is provided. The glass is useful for matched sealing of copper and copper based alloys. The glass is capable of ceramization, greatly increasing the resistance of the glass to moisture penetration and fracture due to mechanical damage. The temperature of ceramization has been designed so that a solutionized copper alloy leadframe is age hardened during ceramization. The glass has particular utility in the manufacture of electronic packages and multi-layer circuitry.

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