| 摘要 |
PURPOSE: A rolled copper foil for flexible printed circuit board and a method for manufacturing the foil are provided to provide the rolled copper foil with good softening characteristics by increasing a softening temperature and by removing a trouble accompanied with the softening. CONSTITUTION: A rolled copper foil for flexible printed circuit board has following characteristics. The Ag contained is in the range of 0.0100 to 0.0400 wt%. O is in the range of 0.0100 to 0.0500 wt%. The sum of more than one of S, As, Sb, Bi, Se, Te, Pb, and Sn is less than 0.0300 wt%. The thickness is in the range of 5 to 50 micrometers. The anti-softening temperature is in the range of 120 to 150 degrees Celsius. The strength of extension is maintained over 300N per millimeter square.
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