A conductive ink composition comprising a carboxylic acid- or anhydride-functional aromatic vinyl polymer, a conductive particulate material, and/or a conductive flake material (any material with an aspect ratio of at least about 5:1) may be printed in a thickness of five microns or less to provide sufficient...http://www.google.se/patents/US20040173781?utm_source=gb-gplus-sharePatent US20040173781 - Method of preparing electrical circuit