MANUFACTURING METHOD OF DUAL SIDE MULTI LAYER TYPED FLEXIBLE PRINTED CIRCUIT BOARD AND DUAL SIDE MULTI LAYER TYPED FLEXIBLE PRINTED CIRCUIT BOARD MANUFACTURED BY THE METHOD THEREOF

摘要

PURPOSE: A double-sided multilayered flexible printed circuit board and a manufacturing method thereof are provided to reduce the number of processes by using a roll-to-roll mode. CONSTITUTION: A dry film is laminated on one side of a flexible copper foil laminated plate for inner layer(S200). The copper foil laminated plate is exposed by using a roll-to-roll exposure(S300). A necessary circuit pattern is formed by developing and etching the exposed double-sided copper foil laminated plate(S400). A coverlay is tack welded on one side on which the circuit is formed(S500). An inner layer and an outer layer are simultaneously hot pressed by positioning a flexible copper foil laminated plate for outer layer on the outermost layer.