Patent ID: 6264849
Filing Date: 2001-07-24
Classification: B41J,B82Y,G06K,G11C,H04N

Abstract:
A method of manufacturing an ink supply print head which ejects ink via the utilization of thermal actuator devices, the method comprising the steps of:(a) providing a silicon and circuitry wafer layer including electrical circuitry necessary for the operation of thermal actuator devices on demand;(b) depositing a first sacrificial layer on top of the silicon and circuitry wafer layer;(c) forming a series of heater structure layers defining the thermal actuator devices on top of the first sacrificial layer;(d) depositing a second sacrificial layer on top of the heater structure layers, the second sacrificial layer including etched portions suitable for forming nozzle chambers;(e) depositing a third sacrificial layer to define nozzle chambers, each nozzle chamber having an ink ejection port positioned above the second sacrificial layer;(f) back etching the silicon wafer layer to form an ink supply channel in a region underneath a moving end of each thermal actuator; and(g) etching the first and second sacrificial layers in addition to relevant portions of the silicon and circuitry wafer layer, to free the thermal actuator devices.