Compositions – Electrically conductive or emissive compositions – Free metal containing
Reexamination Certificate
2011-07-19
2011-07-19
Ginty, Douglas M C (Department: 1765)
Compositions
Electrically conductive or emissive compositions
Free metal containing
C428S402000, C428S403000, C428S407000
Reexamination Certificate
active
07981326
ABSTRACT:
A silver fine powder comprising silver particles with an average particle diameter of 20 nm or less and having an organic protective material on the surface thereof, wherein the proportion of the organic protective material present is 0.05 to 25% by mass based on the total mass of the silver particles and the organic protective material. An amine compound having a molecular weight of 100 to 1,000 is preferably used as the organic protective material, and that having one or more unsaturated bond in one molecule is particularly preferred. This silver fine powder has, for example, a crystallite diameter in (111) crystal plane of silver particle of 20 nm or less. The present invention further provides an ink comprising particles of the silver fine powder dispersed in an organic solvent in the silver concentration of 10% by mass or more, the ink having a viscosity of 50 mPa·s or less.
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M. Nakamoto et al., “Application of Silver Nanoparticles to Conductor Pastes”, Chemical Industry, Vol. 56, No. 10, 2005, pp. 749-754.
Okano Taku
Sato Kimitaka
Clark & Brody
Dowa Electronics Materials Co., Ltd.
Ginty Douglas M C
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