Barrier layer and orifice plate for thermal ink jet print head a

Details Barrier layer and orifice plate for thermal ink jet print head a Barrier layer and orifice plate for thermal ink jet print head a

1986-10-03

1987-12-29

Goldberg, E. A.

Recorders

Markers and/or driving means therefor

With ink supply to marker

204 3, 204 9, 204 11, 204 141, 29157C, 156633, 156644, 1566591, 1566611, 430311, 430312, 346 75, G01D 1518, C25D 102, G03C 500

Patent

active

047164239

ABSTRACT:
This application discloses a thermal ink jet printhead and method of manufacture featuring an improved all-metal orifice plate and barrier layer assembly. This assembly includes constricted ink flow ports to reduce cavitation damage and smooth contoured convergent ink ejection orifices to prevent "gulping" of air during an ink ejection process. Both of these features extend the maximum operating frequency, fmax, of the printhead. The nickel barrier layer and the underlying thin film resistor substrate are gold plated and then soldered together to form a good strong solder bond at the substrate - barrier layer interface.

REFERENCES:
patent: 4255237 (1981-03-01), Obert et al.
patent: 4290857 (1981-09-01), Ineda et al.
patent: 4417946 (1983-11-01), Behclen et al.
patent: 4422905 (1983-12-01), Becker et al.
patent: 4513298 (1985-04-01), Scheu
patent: 4558333 (1985-12-01), Sugitani et al.

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