Metal working – Method of mechanical manufacture – Electrical device making
Patent
1992-11-27
1994-05-03
Arbes, Carl J.
Metal working
Method of mechanical manufacture
Electrical device making
29848, 156150, 156233, 174261, H05K 302
Patent
active
053075617
ABSTRACT:
Shaped contacts (40, 42) for interconnecting circuits or for use in an integrated circuit test probe are electroplated as integral parts of circuit traces (34) upon a stainless steel mandrel (10). A shaped, hardened steel indentation tool (16, 18, 26, 28) makes indentations (24a, 24b) of predetermined shape in the surface of the mandrel (10), which is provided with a pattern of dielectric, such as Teflon (12), or photoresist. Areas of the steel mandrel, including the indentations (24a,24b), are electroplated with a pattern of conductive material (34, 36, 38), and a dielectric substrate (32) is laminated to the conductive material. The circuit features formed by the indentations define raised contacts of a conical (18) or pyramidal (28) shape, having free ends with a small area that allows higher pressures to be applied to a surface against which the contacts are pressed. This enables the contacts to penetrate foreign materials, such as oxides, that may form on the surface of the pads (56, 58), to which the contacts are to be connected to ensure a good contact without any need for wiping action. The projecting contacts can also be pressed into plated holes (82, 84) in a substrate, such as a printed wiring board, to which mateable/demateable electrical connection is to be made.
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Crumly William R.
Feigenbaum Haim
Schreiber Christopher M.
Arbes Carl J.
Denson-Low W. K.
Gudmestad Terje
Hughes Aircraft Company
Leitereg Elizabeth E.
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