Differential transmission cable and method of manufacturing the same
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United States of America Patent
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Sep 1, 2015
Grant Date -
Sep 12, 2013
app pub date -
Mar 7, 2013
filing date -
Mar 7, 2012
priority date (Note) -
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Abstract
A differential transmission cable includes at least one pair of inner conductors arranged in parallel and extending parallel to each other, and a foamed insulating material formed on the inner conductors by a collective extrusion coating and molding of a resin material by using a chemical foaming method and have a variation of foaming degree of not more than 1%. The variation of foaming degree is defined as a difference between a maximum value and a minimum value among foaming degrees (%) of the foamed insulating material at 20 positions at intervals of 50 cm in a longitudinal direction in an arbitrary part of 10 m cut out from the differential transmission cable.
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