Thursday, August 31, 2006

US Patent 7097788 - Conductive Ink Using Oriented Carbon Particles

As mentioned in several earlier postings, printing technology is being explored as part of an alternative manufacturing system for electronics and sensors. This patent teaches a method of increasing conductivity of carbon nanotube based inks printed with inkjet methods. Claim 1 reads:

1. A method of increasing conductivity of an ink, comprising: rubbing the ink to increase conductivity of the ink; followed by conducting electricity through the ink, wherein the ink comprises conductive non-spherical particles comprising carbon, and a solvent, the ink is on a substrate, and the method is carried out without curing at a temperature of at least C. between the rubbing and the conducting.