Thursday, August 31, 2006

US Patent 7097788 - Conductive Ink Using Oriented Carbon Particles

http://www.freepatentsonline.com/7097788.pdf

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 50.degree. C. between the rubbing and the conducting.