| 摘要 |
PROBLEM TO BE SOLVED: To provide a soldering method of high quality. SOLUTION: A vacuum chamber in which a work having solid state solder containing tin alone or tin and one or more components selected from silver, lead, copper, bismuth, indium and zinc is arranged is evacuated into a vacuum state. Thus, a free radical gas is generated to remove an oxide film in the solder. Thereafter, the generation of the free radical gas is stopped, and the solder is heated to a temperature equal to or higher than the melting point of the solder in a nonoxidizing atmosphere to melt the solder. COPYRIGHT: (C)2005,JPO&NCIPI
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