| 摘要 |
A window type double side flexible printed circuit board is provided to improve thermal transfer efficiency in a hot bar process with a printed circuit board pad and produce products having a high adhesive force by forming a window on a double side flexible printed circuit board. A window type double side flexible printed circuit board includes a base film(310), a copper film(320), and a cover film(340). At least one penetration hole which connects circuits formed on both planes is formed on a predetermined position of the base film according to a circuit pattern formed on both sides. A window for improving thermal transfer efficiency is formed at a predetermined position of the base film except the position where the circuit is formed. The copper film is formed into a predetermined pattern on both planes of the base film. The copper film connects predetermined positions of both planes to each other by a conductive plating process through the penetration hole. The cover film selectively covers an upper part of an exposed surface of the copper film.
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