| 摘要 |
PROBLEM TO BE SOLVED: To provide flux for soldering and solder paste having high reliability, wherein the wettability and the storage stability of solder are enhanced, flux resides after the soldering are colorless and transparent, and no cracks are generated even when being subjected to temperature change. SOLUTION: The flux composition for soldering contains phosphor-containing latent carboxylic acid and a compound having at least one carboxylic group and at least one reactive functional group in which chemical bond is formed by heating. The solder paste consists of the flux composition and solder powder blended with each other. COPYRIGHT: (C)2005,JPO&NCIPI
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