Methods and compositions for ink jet deposition of conductive features
View Patent ↗Disclosed is an electrically conductive feature on a substrate, and methods and compositions for forming the same, wherein the electrically conductive feature includes metallic anisotropic nanostructures and is formed by injetting onto the substrate a coating solution containing the conductive anisotropic nanostructures.
1. A coating composition for ink jet printing including:
a first solvent;
a second solvent;
a fluorosurfactant in an amount from 200 ppm-800 ppm of the coating composition; and
from 0.1% to 5% of metallic anisotropic nanostructures;
wherein:
the ratio by weight of the first solvent to the nanostructures is from 7 to 750;
the ratio by weight of the second solvent to the nanostructures is from 5 to 650; and
the ratio by weight of the surfactant to the nanostructures is from 0.001 to 5.
2. The coating composition of claim 1 including from 400 to 600 ppm fluorosurfactant.
3. The coating composition of claim 1 having a boiling point from 100° C. to 180° C.
4. The coating composition of claim 1 having from 1% to 2% by weight nanostructures.
5. The coating composition of claim 1 wherein the first solvent is water, isopropanol, propylene glycol, or ethylene glycol.
6. The coating composition of claim 1 wherein the second solvent is water, isopropanol, propylene glycol, or ethylene glycol.
7. The coating composition of claim 1 wherein the surfactant comprises lithium 3-[2-(perfluoroalkyl)ethylthio]propionate, or (C 2 H 4 O) x (CF 2 ) y C 2 H 5 FO.
8. The coating composition of claim 1 wherein the metallic anisotropic nanostructures are metallic nanowires or metallic nanotubes.
9. The coating composition of claim 8 wherein the metallic anisotropic nanostructures are silver nanowires or gold nanotubes.
10. The coating composition of claim 1 wherein:
the ratio by weight of the first solvent to the nanostructures is from 25 to 60;
the ratio by weight of the second solvent to the nanostructures is from 40 to 50; and
the ratio by weight of the surfactant to the nanostructures is from 0.005 to 0.1.