Abstract A hermetically sealed package for microcircuits is provided with a base plate on which one or more microcircuits are mounted by, for example, soldering them thereto or by means of studs, the studs being positioned in the base plate so as to accommodate the microcircuits which are held down on the plate, for example, by spring fasteners mounted on the studs. The microcircuits may be mounted on a heat conductive carrier base. Electrical feedthroughs by hermetically sealed in the base plate. In certain forms of the package, an isolation wall structure is employed to electrically isolate one microcircuit from another, the wall being secured to the base plate via studs and stud fasteners. The studs and feedthroughs are attached and hermetically sealed to the base plate by inserting them into holes in the base plate while simultaneously forcing the holes to shrink in size, thereby forming a diffusion weld between the studs (and feedthroughs) and the base plate. A cover, which is thin compared to the base plate, is attached and hermetically sealed to the base plate over the microcircuits, carrier, isolation wall and feedthroughs. This is accomplished by employing a tool with an inclined surface to form a diffusion weld between the cover and the base plate.
Inventors
👤 J Smith
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-26 09:34
CPC Classifications
B; B23; B23K; B23K20/00
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
114 words
A method for affixing a first cylindrical shaped metallic member having a ductile outer surface within a cylindrical opening in a second metallic member, the opening having a ductile surface and also a slightly larger internal diameter than the external diameter of said cylindrical member, comprising the steps of Simultaneously directing the cylindrical member into said opening and applying a force to the surface of said second member around said opening to force the inner ductile surface of the opening against the outer ductile surface of said cylindrical member, the two surfaces scrubbing against each other, the force of the opening surface against the cylindrical member surface producing a diffusion weld between the surfaces.
Claim 2
Independent Claim
114 words
A method for affixing a first cylindrical shaped metallic member having a ductile outer surface within a cylindrical opening in a second metallic member, the opening having a ductile surface and also a slightly larger internal diameter than the external diameter of said cylindrical member, comprising the steps of Simultaneously directing the cylindrical member into said opening and applying a force to the surface of said second member around said opening to force the inner ductile surface of the opening against the outer ductile surface of said cylindrical member, the two surfaces scrubbing against each other, the force of the opening surface against the cylindrical member surface producing a diffusion weld between the surfaces.
Claim 3
Dependent Claim
36 words
A method as in claim 1 wherein said two members are first plated with a ductile metal suitable for cold welding, the metal of one of said members being harder than the metal of the other.
Claim 4
Dependent Claim
14 words
A method as in claim 2 wherein said ductile metal comprises copper or gold.
Claim 5
Dependent Claim
25 words
A method as in claim 1 wherein said second metallic member is aluminum with the opening having a ductile inner surface of copper or gold.
Claim 6
Dependent Claim
19 words
A method as in claim 4 wherein the ductile metal surface of said cylindrical member is copper or gold.
Claim 7
Dependent Claim
26 words
A method as in claim 1 wherein the force of the opening surface against the cylindrical member surface also produces a hermetic seal between these surfaces.