Method for producing electrical contacts using selective...

Details Method for producing electrical contacts using selective... Method for producing electrical contacts using selective...

2005-03-29

2005-03-29

Bareford, Katherine (Department: 1762)

Coating processes

Spray coating utilizing flame or plasma heat

Metal or metal alloy coating

C427S191000, C427S422000, C427S427000, C427S424000

Reexamination Certificate

active

06872427

ABSTRACT:
A new kinetic spray process is disclosed that enables the coating to withstand severe bending and stress without delamination. The method includes use of a low pressure kinetic spray supersonic nozzle having a throat located between a converging region and a diverging region. A main gas temperature is raised to from 1000 to 1300 degrees Fahrenheit and the coating particles are directly injected into the diverging region of the nozzle at a point after the throat. The particles are entrained in the flow of the gas and accelerated to a velocity sufficient to result in partial melting of the particles upon impact on a substrate positioned opposite the nozzle and adherence of the particles to the substrate. The coating also has a desirable shinny surface. The method finds special application in coating substrates for use in formation of electrical connections.

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