| 摘要 |
PROBLEM TO BE SOLVED: To provide a bending-resistant flexible flat cable in which bending resistance is maintained at the same level as the conventional level or above, even when the number of conductors is increased by twice or more while conductive resistance is maintained at the same level as the conventional level, and to provide a manufacturing method thereof. SOLUTION: In a bending-resistant flexible flat cable 1 in which a singular or a plurality of flat conductors 2 are integrally sandwiched between plastic films 9 with an insulative adhesive 10, an outer layer of the flat conductors 2 is composed of a Sn-Cu alloy layer and an inner layer is composed of a pure copper layer, the ratio of the thickness of a Sn-Cu alloy layer to that of the flat conductor 2 is set to be 1/10-1/50, the wire drawing draft of the flat conductor is set to be 95% or more, and the 180°peeling strength between the adhesive of the plastic film with the adhesive and the flat conductor is set to be 0.8 kg/cm or more. It is preferred that the drawing of the flat conductor is set to be 5% or more. It is preferred that the adhesive of the plastic film with the adhesive contains a thermoplastic resin, a flame-retardant and a filler. Also it is preferred that the Tg point of the thermoplastic resin is set to be 70°C or more. COPYRIGHT: (C)2004,JPO
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