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US 7,611,644 B2Granted
Core-shell structure metal nanoparticles and its manufacturing method
AssigneeSamsung Electro-Mechanics Co., Ltd.
InventorsIn-Keun Shim, Young-Soo Oh, Jae-Woo Joung
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Abstract
The present invention provides metal nanoparticles, containing copper core and thin layer of precious metals enclosing the core to prevent oxidization of copper, in which manufacturing the metal nanoparticles is economical efficiency because of increased copper content and since such metal nanoparticles contain a metal having high electrical conductivity such as silver for a thin layer, they can form a wiring having better conductivity than copper and there is little concern that silver migration may occur.
Claims22
A method of producing metal nanoparticles, the method comprising:
- forming copper nanoparticles from a copper precursor by using a reducing agent under a solvent including a primary amine;
- and
- forming a metal thin layer having high reduction potential on the surface of the copper nanoparticles, with a metal precursor which has higher reduction potential than copper.
Dependencies are inferred from the claim text.