Barrier layer and orifice plate for thermal ink jet printhead as

Details Barrier layer and orifice plate for thermal ink jet printhead as Barrier layer and orifice plate for thermal ink jet printhead as

1986-12-04

1987-09-15

Goldberg, E. A.

Recorders

Markers and/or driving means therefor

With ink supply to marker

346 75, G01D 1518

Patent

active

046943080

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 nickle 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: 4513298 (1985-04-01), Scheu
patent: 4558333 (1985-12-01), Sugitani et al.

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