Patent ID: 7749397

Claim:
A method of making a micro-fluid ejection device structure comprising the steps of: depositing an insulating layer adjacent to a substrate, the insulating layer having a thickness ranging from about 8,000 to about 30,000 Angstroms, depositing a resistive layer adjacent to the insulating layer, the resistive layer having a thickness ranging from 500 to about 1,500 Angstroms, depositing a sacrificial film layer adjacent to the resistive layer, the sacrificial film layer having a thickness ranging from about 500 to about 5,000 Angstroms, defining a plurality of heater resistors in the resistive layer and the sacrificial film layer, depositing a first metal conductive layer adjacent to the sacrificial film layer and etching the first metal conductive layer to define ground and address electrodes and a heater resistor there between for each of the plurality of heater resistors, depositing a dielectric layer adjacent to the heater resistors and electrodes, the dielectric layer having a thickness ranging from about 1,000 to about 8,000 Angstroms, etching the dielectric layer to provide an exposed surface of the sacrificial film layer comprising the plurality of heater resistors, and oxidizing the exposed surface of the sacrificial film layer to define a protective barrier on the plurality of heater resistors.