| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a soldering paste excellent in a storage stability and durability, wherein resin is hardened at a low temperature in a short time and excellent further in durability, and flux used for the same. <P>SOLUTION: The soldering paste flux includes (A) a thermosetting prepolymer, (B) a polyfunctional epoxy monomer or oligomer having three or more functional groups per molecule, (C) carboxylic acid having a melting point of 80-170°C, and (D) a cyanate ester having two or more cyanato groups per molecule. Further, the soldering paste includes the soldering paste flux and solder metal powder. <P>COPYRIGHT: (C)2013,JPO&INPIT |
