Patent ID: 7281328

Claim:
A method of fabricating a rigid-flexible printed circuit board, comprising the steps of: providing a base substrate having a polyimide layer and an internal circuit pattern formed on at least one of an upper or a lower surface thereof; forming a coverlay, to protect the internal circuit pattern, on a corresponding flexible region of the base substrate that excludes a pad portion of the corresponding flexible region; placing prepregs on the upper and lower surfaces of the base substrate on a corresponding rigid region, placing base copper plates on the prepregs on the corresponding rigid region and the corresponding flexible region on the prepregs, and collectively laminating the placed prepregs and base copper plates to form a rigid region and a flexible region; forming external circuit patterns electrically connected to each other on the rigid region, while the base copper plate serves to protect the flexible region; and removing the base copper plate corresponding to the flexible region after the forming step has formed the external circuit patterns.