The invention is a print head for a thermal or electrostatic printer, the print head being made from a high-density circuit. The high-density circuit includes conductors having a spacing less than about 0.005 inches, the conductors being disposed over a relatively large area. The circuit is defined by...http://www.google.com.au/patents/US5317342?utm_source=gb-gplus-sharePatent US5317342 - High-density print head
