Stable surface coating for ink jet nozzles

Details Stable surface coating for ink jet nozzles Stable surface coating for ink jet nozzles

1985-10-31

1986-11-18

Hartary, Joseph W.

Recorders

Markers and/or driving means therefor

With ink supply to marker

346 75, 239DIG19, G01D 1518

Patent

active

046239065

ABSTRACT:
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.

REFERENCES:
patent: 4007464 (1977-02-01), Bassous
patent: 4047184 (1977-09-01), Bassous
patent: 4368476 (1983-01-01), Uehara
patent: 4389654 (1983-06-01), Bar-on
Tu et al; Ink Jet Silicon Nozzles Coated with Ion-Implanted Silicide for Corrosion Protection; IBM TDB vol. 21, No. 8, Jan. 1979, p. 3371.

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