Patent ID: 9533380
Date: 2017-01-03
CPC Classifications: B22F,B23K

Claim:
1. A bonding material comprising: silver nanoparticles coated with an organic substance having 6 or less carbon atoms and having an average primary particle diameter of 10 to 30 nm as main silver particles; silver nanoparticles coated with an organic substance having 6 or less carbon atoms and having an average primary particle diameter of 100 to 200 nm as secondary silver particles; submicron silver particles having an average primary particle diameter of 0.3 to 3.0 μm; two kinds of solvents having different boiling points, wherein a solvent having a lower boiling point among the two kinds of solvents is at least one solvent selected from butanol, octanol, α-pinene, xylene, and acetylacetone, and a solvent having a higher boiling point among the two kinds of solvents has a boiling point of 230° C. to 320° C. and is at least one solvent selected from alcohol, polyol, and glycol ether; and a dispersant having a phosphate group, wherein the content of silver particles including the main silver particles, the secondary silver particles, and the submicron silver particles in the bonding material is 90% by mass or more.