Patent ID: 7300819

Claim:
A method for mounting a semiconductor device on a printed circuit board, having a semiconductor chip, a substrate having a first wiring layer electrically connected to said semiconductor chip and also having a surface with a terminal, a solder ball connected to said terminal, a through-hole adjacent to said first wiring layer, said through-hole goes through said substrate and extends to said solder ball through said terminal, and a second wiring layer extending from said first wiring layer along an internal wall of said through-hole, said second wiring layer electrically connects between said first wiring layer and said terminal, said method comprising the steps of: placing said semiconductor device on said printed circuit board through said solder ball; inserting a hot heating probe into said through-hole from a surface of said substrate opposite to said surface with said terminal and thrusting said solder ball with said probe in order to melt said solder ball; and pulling said probe out from said solder ball in order to solidify said solder ball.