Patent ID: 7861913
Filing Date: 2011-01-04
Classification: H01L,H05K,Y02P,Y10T

Abstract:
1. A soldering method for mounting a semiconductor device on a wiring board with a plurality of solders provided between said semiconductor device and said wiring board, said soldering method comprising: determining a value of a constant force applied between said semiconductor device and said wiring board during a melting of the plurality of solders corresponding to a predetermined value of a gap between said semiconductor device and said wiring board on a basis of a relationship between said constant force and said gap; thermally melting the plurality of solders; and exerting said constant force of said value during the melting of the plurality of solders by relatively moving said semiconductor device with respect to said wiring board until a resultant reaction force against said constant force produced by all of said plurality of solders is balanced with said constant force, wherein said semiconductor device is relatively moved toward said wiring board so that said solders are pressed therebetween, and wherein the relative movement of said semiconductor device toward said wiring board is carried out during a rise in temperature of said solders.