Electroconductive inks made with metallic nanoparticles
AssigneeAculon, Inc.
InventorEric L. Hanson
Life of this patent
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Abstract
An electroconductive ink made with metallic nanoparticles is disclosed. The ink contains an organophosphorus acid that increases adhesion between the deposited metallic layer and the substrate to which the metallic layer is applied.
Claims23
An electroconductive ink comprising:
- (a) a dispersion of metal nanoparticles with a dispersant on the surface of the metal nanoparticles and as a separate component,
- (b) an omega substituted organophosphorus acid;
- the metal nanoparticles being present in amounts of 5 to 80 percent by weight and the omega substituted organophosphorus acid being present in amounts of 0.0005 to 5 percent by weight;
- the percentages by weight being based on total weight of the electroconductive ink.
An electroconductive ink comprising:
- (a) a dispersion of silver nanoparticles with an organocarboxylic acid dispersant on the surface of the silver nanoparticles and as a separate component,
- (b) an omega substituted organophosphorus acid;
- the silver nanoparticles being present in amounts of 10 to 70 percent by weight and the omega substituted organophosphorus acid being present in amounts of 0.0005 to 5 percent by weight, the percentages by weight being based on total weight of the electroconductive ink.
A process for making an electronic device comprising:
- (a) depositing an electroconductive ink upon a substrate, the electroconductive ink comprising:
- (i) a dispersion of metal nanoparticles with a dispersant adsorbed on the surface of the metal nanoparticles and as a separate component
- (ii) an omega substituted organophosphorus acid;
- the metal nanoparticles being present in amounts of 5 to 80 percent by weight and the omega substituted organophosphorus acid being present in amounts of 0.0005 to 5 percent by weight;
- the percentages by weight being based on total weight of the electroconductive ink;
- (b) heating the deposited electroconductive ink at a temperature sufficient to sinter the nanoparticles to form an electrically conductive layer.
A process for making an electronic device comprising:
- (a) depositing an electroconductive ink on a substrate;
- (i) the electroconductive ink comprising:
- (1) a dispersion of silver nanoparticles with a dispersant on the surface of the silver nanoparticles,
- (2) an omega functional organophosphorus acid;
- the silver nanoparticles being present in amounts of 10 to 70 percent by weight and the omega substituted organophosphorus acid being present in amounts of 0.0005 to 5 percent by weight;
- the percentages by weight being based on total weight of the electroconductive ink;
- (ii) the substrate having groups that are reactive with the acid and/or the omega functional groups;
- (b) heating the deposited composition to a temperature sufficient to remove at least a portion of the dispersant from the surface of the silver nanoparticles and to cause the coalescing silver nanoparticles to bond to the acid and/or the omega functional groups of the organophosphorus acid and the groups of the substrate to bond with the acid and/or the omega groups of the organophosphorus acid in forming an electroconductive layer.
An electrical device comprising an electrically conductive layer comprising metal nanoparticles sintered together and bonded to a substrate with an omega functional phosphorus acid in which the sintered silver is bonded to the omega functional organophosphorus acid through the acid and/or the omega functional groups and in which the substrate is bonded to the omega functional organophosphorus acid through the acid and/or the omega functional groups.
Dependencies are inferred from the claim text.