Method for manufacturing printed circuit board

摘要

Disclosed herein is a method for manufacturing a printed circuit board, wherein a protective film for stripping and a metal layer closely adhered to the protective film for stripping are formed on an inner layer pad to protect the inner layer pad at the time of laser processing related to cavity processing and applying an etchant, thereby making it possible to improve reliability of a product.

主权项

1. A method for manufacturing a printed circuit board, the method comprising:
preparing a base substrate having a circuit layer formed on one surface thereof or the other surface thereof; the circuit layer including an inner layer pad and a circuit pattern; forming an insulating layer for stripping on an outer surface of the inner layer pad in the circuit layer; forming a first insulating layer on the base substrate as well as the insulating layer for stripping and the circuit layer, the first insulating layer having an open part corresponding to the insulating layer for stripping; forming a copper clad laminate (CCL) layer on the first insulating layer so that a first metal layer for a stopper contacts an upper surface of the insulating layer for stripping exposed through the open part; performing cavity processing so that an edge region in an upper surface of the first metal layer is exposed by performing laser processing on the CCL layer; removing the exposed first metal layer in a thickness direction; removing the insulating layer for stripping exposed by removing the first metal layer in the thickness direction; separating the first metal layer contacting the insulating layer for stripping and the insulating layer for stripping from each other; and removing the insulating layer for stripping.