Bubble jet print head having improved multiplex actuation constr

Details Bubble jet print head having improved multiplex actuation constr Bubble jet print head having improved multiplex actuation constr

1989-12-18

1991-03-12

Reinhart, Mark J.

Recorders

Markers and/or driving means therefor

With ink supply to marker

B41J 205

Patent

active

049996509

ABSTRACT:
A multiplex drop ejection construction for a drop-on-demand, ink jet printer. The construction includes a support substrate; a first circuit portion having branches that include a resistive heater element and a diode device formed in spaced relation on the substrate. A dielectric passivation layer overlies the first circuit portion except at the discrete terminal regions of the first circuit portion branches. A second circuit portion comprising a plurality of multiplex electrode lines overlies the passivation layer and includes connection sections extending through the passivation layer into contact with terminal regions of the first circuit. A second passivation layer overlies the second circuit portion, but not the resistive heater elements.

REFERENCES:
patent: 4429321 (1984-01-01), Matsumoto
patent: 4463359 (1984-07-01), Ayata et al.
patent: 4575737 (1986-03-01), Vermot-Gaud et al.
patent: 4695853 (1987-09-01), Hackleman et al.
patent: 4791440 (1988-12-01), Eldridge et al.
patent: 4847630 (1989-07-01), Bhaskar et al.
patent: 4862197 (1989-09-01), Stoffel

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