Method of manufacturing a fluid ejector head

A fluid ejector head is manufactured. Sidewalls of at least one fluid ejection chamber are defined about at least one fluid drop generator disposed over a substrate. At least one bore is created over the at least one fluid ejection chamber. The at least one bore has a first nozzle surface proximate to the at least one fluid ejection chamber, and a second nozzle surface distal to the at least one fluid ejection chamber. An initial deposit of a protective layer material is deposited at a low substrate bias voltage through the at least one bore. A portion of the initial deposit of the protective layer material is redistributed on the sidewalls at a high substrate bias voltage. An inorganic protective layer is formed on the sidewalls of the at least one fluid ejection chamber and on a portion of the first nozzle surface.