Low resistance hermetic lead structure
AssigneeIxion, Inc.
InventorJay Greenspan
Life of this patent
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Abstract
The invention provides a lead structure having a lead of low resistance material disposed within a surrounding sleeve or collar of low expansion material which is bonded at one end to the lead. The sleeve or collar is bonded on its outer surface to an insulating wall through which the lead structure extends. The lead is preferably copper and the sleeve or collar is preferably a nickel-alloy. The lead is hermetically sealed to the surrounding sleeve, and the sleeve is hermetically sealed to the insulating wall to provide a hermetic structure which does not detract from the use of high conductivity electrical lead materials which are often not employable in conventional hermetic sealed leads or packages. A plurality of lead structures can be employed in one or more walls of a circuit package.
Claims11
A lead structure for hermetically sealing to an insulator, said lead structure comprising:
- a lead of highly conductive material;
- and
- a sleeve having a first end, a middle section and a second end, said sleeve made of low expansion material and disposed around a portion of said lead, an inside of said first end of said sleeve bonded to said lead and said middle section and said second end of said sleeve separate from said lead.
A hermetically sealed interconnection assembly comprising:
- a plurality of lead structures, each including a lead of highly conductive material and a sleeve having a first end, a middle section and a second end, said sleeve made of low expansion material and disposed around a portion of said lead, an inside of said first end of said sleeve bonded to said lead;
- and
- a substrate of insulating material having a plurality of holes disposed therethrough
- each of said lead structures disposed in a respective one of said holes, and having an outer surface of said second end of the sleeve of the lead structure bonded to the confronting portion of the insulating material disposed around the sleeve.
Dependencies are inferred from the claim text.