| 摘要 |
PURPOSE:To enhance the durability of the metal wire of a flat cable repeatedly used by the bending and stretching with a small bending radius. CONSTITUTION:In an electronic pocket note which is one example of an opening and closing type electric circuit part, two circuit substrates connected in such a manner as to be capable of opening and closing through a hinge mechanism are electrically connected through a flexible flat cable 7. As the base material 8 having a thin plate sectional form of the flat cable 7, polyethylene terephthalate(PET) is used, and a silver foil 9 is used as a foil metal wire distributed on the base material 8. For example, compared with the case using polyimide as the base material and a copper foil as the metal wire, the repeat frequency until these metal wires are broken by the repeated bending and stretching with a fixed bending radius is extremely extended. |
