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Influence of Glass-Frit Size on the Microstructural Evolution of Conductive Silver Paste  

Han, Hyun Geun (Department of Advanced Materials Engineering, Chosun University)
Seo, Dong Seok (Department of Advanced Materials Engineering, Chosun University)
Lee, Jong Kook (Department of Advanced Materials Engineering, Chosun University)
Publication Information
Korean Journal of Metals and Materials / v.46, no.8, 2008 , pp. 516-523 More about this Journal
Abstract
The effect of glass-frit size on microstructural evolution and electrical resistance of conductive silver paste was investigated. Silver paste was prepared by mixing 70 wt% commercial silver powder with $1.6{\mu}m$, 3 wt% Bi based glass-frit and 27 wt% organic vehicle. Two different sizes of glass-frit were obtained by ball-milling of commercial glass-frit ($3{\mu}m$) for 3 and 5 days, which had an average particle size of 1.0 and $0.5{\mu}m$. The smaller glass-frit was melt at low sintered temperature and rapidly spread between the silver particles, which is induced the dense networking among silver particles and strong adhesiveness to $Al_2O_3$ substrate. The silver film with smaller glass-frit sintered at $500^{\circ}C$ showed the small pore size and low porosity resulting in low electrical resistivity of $4{\mu}{\Omega}cm$.
Keywords
conductive silver paste; glass-frit size; microstructural evolution;
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