Metal working – Method of mechanical manufacture – Electrical device making
Patent
1993-01-11
1994-01-11
Vo, Peter Dungba
Metal working
Method of mechanical manufacture
Electrical device making
294411, 29743, 29DIG44, H05K 320
Patent
active
052769640
ABSTRACT:
There is disclosed a high density electronic connector system in which a plastic insulating body supports on one or more levels a plurality of conductive circuit traces. Output contacts to these traces are provided by small metal balls. The metal balls are driven into tight contact with respective ones of the conductive traces and captivated by the plastic body. The balls are covered with gold and provide miniature, wear resistant closely spaced output contacts in the connector system. A ball may contact conductive traces on two levels of the insulating body and thereby provide an electrical connection between conductive traces. A method of manufacture of the connector system includes the steps of heating the plastic body to an elevated temperature, and driving the small metal balls through or against a respective conductive trace and into the plastic body which thereby captivates it. The conductive traces may be solder plated. After a ball is seated in contact with a conductive trace, the solder plating may be reflowed.
REFERENCES:
patent: 3037265 (1962-06-01), Kollmeier
patent: 3346950 (1967-10-01), Schick
patent: 4319708 (1982-03-01), Lomerson
patent: 4833775 (1989-05-01), Nager, Jr.
patent: 5088639 (1992-02-01), Gondotra et al.
patent: 5131141 (1992-07-01), Kawaguchi
Anderson, Jr. Herbert R.
Bross Arthur
Cempa Julian G.
Lussow Robert O.
Myers Donald E.
Dungba Vo Peter
Huberfeld Harold
International Business Machines - Corporation
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