Patent ID: 7600859
Filing Date: 2009-10-13
Classification: B41J

Abstract:
1. An inkjet printhead comprising: a substrate; a heating layer disposed on the substrate to dispense liquid; a conductive layer disposed to conduct a current to the heating layer, wherein the conductive layer comprises a stepped portion used as a heating area, wherein the heating area is defined by the conductive layer and the heating layer; an adhesive layer disposed on the conductive layer; a porous material, disposed on the substrate, including a chamber, wherein the liquid flows to the chamber through the porous material, the chamber has a first side and a second side, the first side is overlapped with the heating area so that the liquid in the chamber is located above the heating area, and the second side is connected to the first side; and a nozzle plate, disposed on the second side of the chamber, including at least one orifice, wherein the nozzle plate abuts the porous material.