| 摘要 |
PROBLEM TO BE SOLVED: To provide a flexible wiring board for both side connection in which connection reliability can be enhanced with respect to a circuit board, while dealing with fin pitch patterning. SOLUTION: The flexible wiring board 1 comprises a polyimide film 10, where a filmy basic material is turned down and the opposing faces are bonded tightly, and a pattern electrode 13 is formed continuously from the first surface 11 to the second surface 12 of the polyimide film 10. In order to obtain the inventive flexible wiring board 1, the pattern electrode 13 is formed on one side of the polyimide film 10, which is then turned down and hot pressed, while a prescribed adhesive 14 is arranged between the opposing faces of the polyimide film 10.
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