Glass-to-metal seal

Details Glass-to-metal seal Glass-to-metal seal

1991-09-20

1993-07-13

Lewis, Michael

Stock material or miscellaneous articles

All metal or with adjacent metals

Composite; i.e., plural, adjacent, spatially distinct metal...

428670, 428634, 174 5061, 65 591, C03C 2702, H05K 506

Patent

active

052272508

ABSTRACT:
A glass-to-metal seal including a metal member such as Pd or a Pd-Ru alloy and a glass member wherein the glass member is in contact with the metal member and forms a glass-to-metal seal therewith. The seal can include an outer body surrounding the glass member and forming a seal therewith. The outer body has a coefficient of thermal expansion greater than that of the glass member and the seals between the outer body, the glass member and metal member are compression seals. The glass-to-metal seal is made by directly glassing onto the metal member in a furnace having an atmosphere which prevents outgassing of hydrogen from the metal member into the interface between the glass member and metal member. After the glass-to-metal seal forming step, the outer body can be metallurgically bonded to another component without chemically cleaning the outer body and the metal member can be metallurgically bonded to another member such as a gold wire without plating the metal member prior to the bonding step.

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