PRINTED WIRING BOARD AND MANUFACTURING METHOD THEREFOR

摘要

A printed wiring board has a circuit substrate 6 having a conductor circuit 5 and a through hole 60, and also has a joining pin 1 inserted into the through hole. The joining pin is manufactured by using a material unmelted at a heating temperature in joining the joining pin to an opposite party pad 81. The joining pin is constructed by a joining head portion 11 greater than an opening diameter of the through hole and forming a joining portion to the opposite party pad, and a leg portion 12 having a size capable of inserting this leg portion into the through hole. The leg portion is inserted into the through hole and is joined to the through hole by a conductive material such as a soldering material 20, etc. A joining ball approximately having a spherical shape instead of the joining pin can be also joined to the through hole by the conductive material.