Patent ID: 8535547

Claim:
A method of manufacturing a printed circuit board, comprising: providing a substrate that comprises a first insulation layer having a pad and a second insulation layer covering the pad; acquiring an image of the substrate by use of an image sensor; analyzing the image of the substrate and acquiring location information of the pad covered by the second insulation layer, the acquiring the location information of the pad comprising defining an area of the pad in the image of the substrate, and extracting a center coordinate of the area of the pad that corresponds to the pad in the image of the substrate by converting the area of the pad to a black and white image and calculating a center of mass in the converted area; forming a via hole by removing a part of the second insulation layer that corresponds to the acquired location information of the pad, the forming the via hole comprising using a laser drilling process and generating a control signal based on the location information of the pad; and forming a via by filling the via hole with a conductive material.