Printed wiring board with joining pin and manufacturing method therefor

A printed wiring board comprising a circuit substrate having a conductor circuit, a through hole with an opening diameter, and a joining pin inserted into said through hole;

• the printed wiring board being characterized in that said joining pin is manufactured by using a material unmelted at a heating temperature for joining and connecting the joining pin to an opposite party pad, said joining pin consisting only of a single joining head portion and a leg portion extending from said joining head portion, said joining head portion having a greater diameter than the opening diameter of said through hole, said joining pin providing a joining portion for joining and connection to said opposite party pad, said leg portion having a diameter smaller than the diameter of said head portion, said leg portion having a diameter smaller than the opening diameter of said through hole, and said leg portion being positioned in said through hole and joined to said through hole by a conductive material;
• said joining head portion comprising an enlarged end section providing an enlarged end of said joining pin;
• said leg portion comprising a smaller end section providing a smaller end of said joining pin, said smaller end section having a smaller diameter than the diameter of said enlarged end section;
• and
• said joining head portion comprising a generally spherical head portion having a generally spherical body with a diameter greater than the diameter of said leg portion.