Printhead integrated circuit with suspended heater elements

Details Printhead integrated circuit with suspended heater elements Printhead integrated circuit with suspended heater elements

2011-03-08

2011-03-08

Stephens, Juanita D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S062000

Reexamination Certificate

active

07901050

ABSTRACT:
An inkjet printhead integrated circuit comprises a silicon substrate having a layer of drive circuitry and a passivation layer over the drive circuitry layer. The passivation layer defines a plurality of vias exposing a plurality of contacts in the underlying drive circuitry. Sidewalls extend from the passivation layer and meet with a nozzle plate spaced apart from the passivation layer. The nozzle plate and the sidewalls together form a plurality of ink chambers, each ink chamber having a nozzle opening defined in the nozzle plate and an ink inlet. A heater element is suspended in each of the ink chambers. Each heater element is electrically connected to a respective pair of contacts in the drive circuitry layer through a respective pair of the vias.

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patent: 3918472 (1990-12-01), None
patent: 0882593 (1998-12-01), None

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