| 摘要 |
PROBLEM TO BE SOLVED: To provide a joining method using metal nanoparticles by which the joinability of a joining material is increased while evading the resistance value of joined parts from increasing and also cost from raising. SOLUTION: By tightly sticking the surface of a member 10 to be joined with a first joining material 12A in which the containing ratio of metal nanoparticles 18S with relatively small particle sizes is increased, the joinability between the member 10 and the metal nanoparticles 18S increases. Further, the relatively small metal nanoparticles 18S largely comprised in the first joining material 12A can not absorb the ruggedness in the surface of the member 10 since the size of the metal nanoparticles is smaller than that of the ruggedness in the surface of the member 10, but the ruggedness can be absorbed by a second joining material 12B having excellent ruggedness absorbability owing to the incorporation of metal nanoparticles 18L with relatively large particle sizes. COPYRIGHT: (C)2009,JPO&INPIT
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