| 摘要 |
There is provided a printed circuit board including an insulating substrate having a guide hole, a solder resist layer coated on a surface of the insulating substrate, and a connection pad arranged on the surface of the insulating substrate and having an outer periphery covered with the solder resist layer and a central portion exposed in an opening formed in the solder resist layer. The solder resist layer has a positioning hole having a diameter smaller than that of the guide hole and formed by photolithography above the guide hole simultaneously with the opening. |
