Patent ID: 8828245
Filing Date: 2014-09-09
Classification: C25D,H05K

Abstract:
1. A fabrication method of a flexible circuit board, the fabrication method comprising: providing a metal carrier foil, wherein a surface of the metal carrier foil comprises a metal oxide layer, and the metal oxide layer is formed by oxidizing the metal carrier foil; forming a conductive seed layer on the metal oxide layer by electroplating; forming a flexible organic insulating layer by casting an organic insulating material or a resin solution of a precursor of the organic insulating material on the conductive seed layer, followed by performing a baking process and a hardening process; attaching a pliable insulating backing layer to the flexible organic insulating layer after the step of forming the flexible organic insulating layer; peeling off the metal carrier foil at an interface between the metal carrier foil and the conductive seed layer; and forming a patterned circuit on the conductive seed layer.