Patent ID: 6808866
Filing Date: 2004-10-26
Classification: H05K,Y10T

Abstract:
A process for massively producing tape type flexible printed circuits comprising the steps of:(a) providing a flexible insulation tape reeled in a reel, the flexible insulation tape having a plurality of parallel cutting lines and a plurality of rows of circuit regions; (b) pressing a copper foil, pressing a dry film on the flexible insulation tape setting first standard points; (c) positioning the flexible insulation tape by the first standard points, developing the dry film to form a pattern; (d) etching the copper foil to form metal traces, removing the dry film; (e) attaching cover films on the flexible insulation tape; (f) surface treating the flexible insulation tape to make exposed portions of the metal traces form an electroplating layer; and (g) punching the flexible insulation tape to form a plurality of sprocket holes on opposing sides of each of the plurality of rows of circuit regions along the parallel cutting lines; and separating the flexible insulation tape along the parallel cutting lines by a cutting or punching method to form a plurality of flexible circuit tapes with the sprocket holes for reeling the plurality of flexible circuit tapes on sub-reels.