Patent ID: 7462802

Claim:
A multilayer printed wiring board manufacturing method comprising: forming at least one positioning mark and at least one interlayer insulating agent layer on a multilayer printed wiring board; providing a manufacturing apparatus including a processing laser source configured to emit a laser beam, a scanning head configured to deflect the laser beam in X-Y directions, a camera configured to measure a position of the at least one positioning mark, and an X-Y table configured to hold the multilayer printed wiring board, and having a light source embedded in an area corresponding to the at least one positioning mark, the light source being configured to emit light; inputting processing data of the multilayer printed wiring board to said manufacturing apparatus; measuring with the camera the position of the at least one positioning mark by recognizing a silhouette of the at least one positioning mark which is generated by the light emitted from the light source of said X-Y table; correcting the processing data based on the position of the at least one positioning mark; generating drive data for driving at least one of the scanning head and the X-Y table; and controlling at least one of the X-Y table and the scanning head based on said drive data to apply the laser beam to the multilayer printed wiring board to form a hole in the at least one interlayer insulating agent layer, wherein the at least one interlayer insulating agent layer comprises a plurality of interlayer insulating agent layers including an upper layer and a lower layer, the at least one positioning mark comprises a plurality of positioning marks including a positioning mark covered by the upper layer and a positioning mark covered by the lower layer, and the positioning mark of the upper layer is deviated from the positioning mark of the lower layer.