Patent ID: 7946026
Filing Date: 2011-05-24
Classification: B41J,Y10T

Abstract:
1. A method of producing an ink jet printhead, the method comprising the steps of: forming a substrate having defined therein a nozzle chamber for receiving and storing a fluid, the chamber fed at one side by an inlet passage; forming a nozzle plate in-situ on the substrate to define a nozzle opening on an opposite side of the nozzle chamber to the inlet passage; and forming first and second heater elements suspended between the nozzle opening and the inlet passage, the heater elements having two opposite planar sides and positioned to be in direct thermal contact with the fluid stored in the nozzle chamber at both opposed planar sides, wherein the first heater element is formed on a different layer to the second heater element, and the first heater element is formed with a surface area larger than that the second heater element.