Patent ID: 8109608

Claim:
A method for making a micro-fluid ejection head, the method comprising the steps of: applying a first photoresist layer to a device surface of a substrate containing fluid ejection actuators; imaging a plurality of flow features in the first photoresist layer; developing the imaged first photoresist layer to provide a thick film layer including the plurality of flow features therein; applying a second photoresist layer to the thick film layer, the second photoresist layer having a thickness ranging from about 10 to about 30 microns; applying a release liner to a surface of the second photoresist layer opposite to a surface attached to the thick film layer; stress relieving the second photoresist layer; removing the release liner from the second photoresist layer; and thereafter imaging a plurality of nozzle holes in the second photoresist layer; and developing the imaged second photoresist layer to provide a photoresist nozzle plate on the first photoresist layer.