| 摘要 |
PROBLEM TO BE SOLVED: To provide a flexible printed board (FPC) which is improved in elasticity and heat resistance without sacrificing a flexibility. SOLUTION: The FPC is made by laminating a base film 11, base film-side adhesive layer 12, metal foil layer 13 which constitutes a patterns circuit, coverlay-side adhesive layer 14, and coverlay film 15 in this order. A crossliking density on the side of the adhesive layers 12, 14 near and around the metal foil layer 13 is made larger than the other parts. As a result, without sacrificing a flexibility of the entire FPC, elasticity and heat resistance of the FPC can be improved.
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