Method to Detect "In Situ" Defects in Nozzles in Ink Jet Printers
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12
In ink jet printing, silicon nozzles, which are vibrated periodically by ultrasonic excitation, are used to produce continuous streams of ink droplets. Because of stress concentrations, microcracks and fractures are generated near the orifices in SiO films and silicon nozzles during excitation. These defects cause severe deterioration of nozzle performance and eventually induce a fatal failure of an ink jet printer.