Print head structure production, for thermal ink jet printer head, comprises applying multi-layer passivation coating onto patterned heating and conductive layers

摘要

Thermal ink jet printer head structure production comprises applying a multi-layer passivation coating onto patterned heating and conductive layers (204,206) on an insulating substrate. An Independent claim is also included for a thermal ink jet printer head structure produced by the above process. Preferred Features: The multi-layer passivation coating comprises a stack of alternate soft passivation layers, especially of silicon, silicon oxide and silicon dioxide (SiO2), and hard passivation layers, especially of silicon nitride (Si3N4) or silicon carbide (SiC).