| 摘要 |
PROBLEM TO BE SOLVED: To provide a tin-zinc-based solder paste easily affected by oxidation and having excellent solderability even under a severe reflow condition including a preheat for a long time at a high temperature of≥160°C. SOLUTION: The solder paste comprises, by weight, 5-20% flux (F) and 80-95% metal powder (M) of the following: The metal powder is an alloy containing flux (M) containing 0.1-20 weight% aluminum coordinate compound and 5-80% carboxylic activator, Sn and Zn. (F) the flux comprises 0.1-20 wt.% aluminum coordinate compound and 5-80% carboxylic activator; (M) the metal power is an alloy comprising Sn and Zn. COPYRIGHT: (C)2007,JPO&INPIT
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