Metal working – Method of mechanical manufacture – Fluid pattern dispersing device making – e.g. – ink jet
Reexamination Certificate
2005-07-25
2009-06-30
Tugbang, A. Dexter (Department: 3729)
Metal working
Method of mechanical manufacture
Fluid pattern dispersing device making, e.g., ink jet
C204S192100, C427S255395
Reexamination Certificate
active
07552533
ABSTRACT:
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.
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Hewlett--Packard Development Company, L.P.
Tugbang A. Dexter
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