Silver Nanoparticle Ink

A process for preparing an ink composition comprising:

• combining a metal nanoparticle;
• at least one aromatic hydrocarbon solvent, wherein the at least one aromatic hydrocarbon solvent is compatible with the metal nanoparticles;
• and
• at least one aliphatic hydrocarbon solvent, wherein the at least one aliphatic hydrocarbon solvent is compatible with the metal nanoparticles;
• wherein the ink composition has a metal content of greater than about 45 percent by weight, based upon the total weight of the ink composition;
• wherein the ink composition has a viscosity of from about 5 to about 30 centipoise at a temperature of about 20 to about 30° C.

A process comprising:

• providing a composition comprising a metal nanoparticle;
• at least one aromatic hydrocarbon solvent, wherein the at least one aromatic hydrocarbon solvent is compatible with the metal nanoparticles;
• at least one aliphatic hydrocarbon solvent, wherein the at least one aliphatic hydrocarbon solvent is compatible with the metal nanoparticles;
• wherein the ink composition has a metal content of greater than about 45 percent by weight, based upon the total weight of the ink composition;
• wherein the ink composition has a viscosity of from about 5 to about 30 centipoise at a temperature of about 20 to about 30° C.;
• depositing the ink composition onto a substrate to form deposited features;
• and
• optionally, heating the deposited features on the substrate to form conductive features on the substrate.