Tuesday, July 27, 2010

US Patent 7763187 - CNT reinforced silver ink


This patent from Oceanit Labs teaches improved adhesive conductive inks for use in printed circuit fabrication which incorporate carbon nanomaterials. Claim 1 reads:

1. A conductive silver ink material, comprising:

a conductive ink having silver flake particles, a polymer and a solvent, and

a reinforcement and conductive material having at least one dimension of about 100 nm or less dispersed within the conductive ink,

wherein the silver content is 2% to 95% on the basis of the weight of the conductive silver ink material,

wherein the solvent is volatile,

wherein the reinforcement material comprises at least one nanoparticle selected from the group consisting of carbon nanotubes, buckyballs, and graphene,

wherein the reinforcement material is present in a concentration between approximately 0.00001% to 80% on the basis of the weight of the conductive silver ink material so as to improve strength, toughness and higher electrical conductivity and lower thermal resistance, resulting in improved mechanical, electrical and thermal properties of the material.