Patent ID: 7581820
Filing Date: 2009-09-01
Classification: B41J

Abstract:
1. An inkjet printhead comprising: a substrate; a heater formed on the substrate; an electrode formed on the heater to apply a current to the heater; a chamber layer which is stacked on an upper part of the substrate on which the heater and the electrode are formed and comprises an ink chamber which stores an ink to be ejected and is formed above a heat generation part of the heater; and a nozzle layer which is stacked on an upper part of the chamber layer and comprises a plurality of nozzles through which the ink is ejected, wherein the heat generation part directly contacts the ink in the ink chamber and the heater is formed of one of an alloy of Pt—Ru, where the composition percentage of Ru is about 20% to about 80%, and an alloy of Pt—Ir, where Pt and Ir have the same composition percentage, and a material X.