| 摘要 |
PROBLEM TO BE SOLVED: To perform soldering accurately, finely, and surely by inhibiting the oxidation of molten solder. SOLUTION: A pump 2 for circulating molten solder is provided at a soldering bath 1 whose upper surface is open. In the soldering device for soldering by bringing a printed circuit board 3 into contact with the melted solder that is circulated by the pump 2, a reflux path 4 for making the molten solder flow back extending from one side to the other of the soldering bath 1 is formed at the soldering bath 1. |
