Patent ID: 8499441

Claim:
A method of manufacturing a printed circuit board, the method comprising: stacking a solder resist layer flat on one side of a carrier; forming a first circuit pattern on the solder resist layer, the first circuit pattern including a first electrode pad; forming a conductive post on the first electrode pad; stacking and pressing the carrier onto an insulation layer stacked in an inner substrate such that the conductive post faces the insulation layer and a thickness of the inner substrate is made more uniform; and removing the carrier in such a way that the solder resist layer remains on the insulation layer, wherein forming the first circuit pattern comprises: forming a seed layer on the solder resist layer by performing electroless plating; stacking a first photoresist on the seed layer; selectively removing a portion of the first photoresist in correspondence to a position where the first circuit pattern is to be formed; and performing electroplating with the seed layer as an electrode, wherein forming the conductive post comprises: stacking a second photoresist such that the second photoresist covers the first circuit pattern and the first photoresist; selectively removing a portion of the second photoresist in correspondence to a position where the conductive post is to be formed; and performing electroplating with the seed layer as an electrode, and wherein stacking the solder resist layer comprises: stacking a solder resist layer on one surface of each of two carriers, forming the first circuit pattern comprises: forming a first circuit pattern including a first electrode pad on each of the solder resist layers, forming the conductive post comprises: forming a conductive post on each of the first electrode pads, and stacking and pressing the carrier onto the insulation layer comprises: stacking and pressing each of the two carriers onto an insulation layer stacked in either side of the inner substrate such that a side of each of the two carriers having the conductive post formed thereon faces each of the insulation layers.