COPPER OR COPPER ALLOY RECTANGULAR CONDUCTIVE BODY AND FLEXIBLE FLAT CABLE

摘要

<P>PROBLEM TO BE SOLVED: To provide a plated Cu rectangular conductive body for a flexible flat cable (FFC) which has excellent corrosion resistance and insertion/drawing durability even when the rectangular conductive body of tin or tin alloy plated copper or copper alloy is heat-treated and capable of suppressing generating whisker after connector engagement, wherein the maximum length of the generated whisker is controlled to ≤50 μm. Ž<P>SOLUTION: A SnPd alloy plated layer containing 3-25 mass% palladium is formed on the Cu rectangular conductive body on which at least a terminal part is formed and a pure Sn plated layer or a Sn based alloy plated layer is formed thereon. The purpose is achieved by forming the plated Cu rectangular conductive body having 0.5-2.0 μm thickness of the total plated layer and 0.3-1.0 μm thickness of the pure Sn plated layer or the Sn based alloy plated layer. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž