International Business Machines Corporation

G V Chandrashekhar

Jerome J Cuomo

Richard Joseph Gambino

Praveen Chaudhari

James M Harper

Merrill W Shafer

An improved glass or silicon ink jet nozzle is described having a three-layer coating that provides improved mechanical and chemical properties. The coating includes a first layer of silicon nitride, an intermediate layer graded in composition, and a top-most layer of aluminum nitride. The intermediate layer is typically a solid solution of silicon and aluminum nitrides being silicon-rich at the interface with the silicon nitride layer, and aluminum-rich at the interface with the overlying aluminum nitride layer. This three-layer coating provides the required dielectric properties, displays very low wettability, and is extremely corrosion resistant to all types of inks.

Stable surface coating for ink jet nozzles

The present invention describes an ion source which is capable of producing relatively high density ion currents. The ion source employs an electrically biased ionic conductor to supply ions from a reservoir of the atomic species.

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Mahopac, NY, United States of America

G V Chandrashekhar