| 摘要 |
PROBLEM TO BE SOLVED: To provide a flat cable that prevents whiskers from causing a short circuit accident between conductors, has superior soldering wettability, has high solder joint strength at high temperatures, contains no noxious lead component in environment, and is suitable for high density flat cable application. SOLUTION: A plurality of silver-tin alloy plating flat type conductors 2, composed of 0.1-10.0 wt.% silver and residual wt.% tin, are arranged in parallel between two upper and lower tape-like insulating plastic films 3, 4 at an interval (P). Respective terminals of the silver-tin alloy plating flat type conductors 2 are exposed by a prescribed length from both terminals of tape-like insulating plastic films 3, 4 to provide connection terminals 5, 6. In this state, two tape-like insulating plastic films 3, 4 are heated and fused via thermally fused adhering layers 3A, 4A, and additionally reinforcing films 7, 8 are adhered to one side surfaces of the silver-tin alloy plating flat type conductors 2 of the connection terminals 5, 6 to form this flat cable 1.
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