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US 5,118,299 AGranted
Cone electrical contact
AssigneeInternational Business Machines Corporation
InventorsFrancis C. Burns, John J. Kaufman, David E. King, Alan D. Knight
Life of this patent
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AssigneeInternational Business Machines Corporation
InventorsFrancis C. Burns, John J. Kaufman, David E. King, Alan D. Knight
Estimating the term…
An electrical interconnection, which includes a method for fabricating the device, is disclosed. The interconnection comprises two contact surfaces, on at least one of which is disposed at least one conical projection in predetermined dimension and location. Rather than being permanently cojoined, the contact surfaces are attachable and detachable when desired. The individual conical projections are comprised of an ablative material, and at least some of the conical projections include a surface which is substantially comprised of material in a thickness capable of making ohmic contact, either by wiping with an intermeshing like structure or by contacting a substantially flat contact pad. An interconnection, in this invention, is the combination of at least one contact having individual conical projections and another contact, optionally having individual conical projections. The conical projections are formed by laser. The conical projections are optionally formed on the head of a contact pin.
A contact for use between microcircuits in PCB devices, comprising a conductive surface and a plurality of sharply domed, substantially conical projections of predetermined dimensions protruding therefrom and integral therewith in predetermined location each of said plurality of projections being sufficiently rigid to penetrate any containment film or debris on a mating conductive surface, and each having a polymer core and a substantially electrically continuous conductive surface in electrical communication with the conductive surface from which they protrude, having also a domed end for making contact.
An electrical interconnection for use in directly connecting microcircuits in PCB devices, comprising:
An electrical interconnection for use in directly connecting microcircuits in PCB devices, comprising:
The contact or electrical interconnection recited in claims, 1, 7 or 11 wherein the projections are about 2 mils to about 6.5 mils high, have a top radius of curvature of about 1/4mil to about 1/2mil, and a base diameter of about 1 to about 2 mils.
Dependencies are inferred from the claim text.