Patent ID: 8222540

Claim:
A printed wiring board comprising: an insulating core layer; a plurality of conductive vias having axes parallel to a reference axis; the plurality of conductive vias being at equal distances from the reference axis and passing through the core layer from the front surface to the back surface; a first conductive film formed on the front surface of the core layer and expanding from the reference axis to each of the plurality of conductive vias; a first insulating film stacked on the front surface of the core layer and covering the first conductive film; wherein the first conductive film linearly extends individually from the reference axis to the vias; a first conductive connecting via having an axis identical to the reference axis and passing through the first stacked film from the back surface to the front surface; a second conductive film formed on the back surface of the core layer from the reference axis to each of the plurality of conductive vias; a second insulating film stacked on the back surface of the core layer and covering the second conductive film; and a second conductive connecting via having an axis identical to the reference axis and passing through the second stacked film from the back surface to the front surface.