Copper alloy and electrically conductive material for connecting parts, and mating-type connecting part and method for producing the same
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United States of America Patent
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Feb 17, 2015
Grant Date -
Sep 29, 2011
app pub date -
Mar 22, 2011
filing date -
Mar 26, 2010
priority date (Note) -
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Abstract
A mating-type connecting part can be obtained by stamping and surface-roughening a copper sheet into a predetermined shape with depressions as a plurality of parallel lines. The copper sheet then has a roughness of from 0.5 μm to 4.0 μm parallel to a sliding direction upon connection, a mean projection-depression interval of from 0.01 mm to 0.3 mm in that direction, a skewness less than 0, and a protrusion peak portion height of 1 μm or less. The copper sheet is then plated with Cu and Sn, followed by reflowing. The result is a connecting part having a Sn surface coating layer group as a plurality of parallel lines, and a Cu-Sn alloy coating layer adjacent to each side of each Sn surface coating layer.
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