| 摘要 |
PROBLEM TO BE SOLVED: To improve the wet-spreading property of solder by devising a soldering powder manufacturing method. SOLUTION: In the solder powder manufacturing method, a raw solder alloy is melted, the temperature of a molten solder alloy is adjusted to the liquidus temperature of the solder alloy +10 to +30°C, and the molten solder alloy is atomized at the temperature. It is confirmed that the wet-spreading property of the solder is improved both in the industrial applications and in the test, if the atomization temperature (the dripping temperature) of the molten solder alloy is set to the liquidus temperature of the solder alloy +10 to +30°C. COPYRIGHT: (C)2006,JPO&NCIPI
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