Printhead having nozzles with stacked capacitive actuators

Details Printhead having nozzles with stacked capacitive actuators Printhead having nozzles with stacked capacitive actuators

2010-05-04

2011-12-20

Stephens, Juanita D (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S047000

Reexamination Certificate

active

08079670

ABSTRACT:
A printhead is provided having a fluid ejection nozzles which each have a substrate, a layer of drive circuitry deposited on the substrate, and subsequent etchant layers deposited on the drive circuitry to define a nozzle chamber with walls and a roof structure defining a fluid ejection port. Each nozzle also has a stacked capacitive actuator arranged in the chamber. The actuator has alternate electrode plates sandwiched between a compressible polymer, wherein activation of the stacked actuator draws the electrode plates together to compress the polymer storing energy therein, with subsequent de-activation releasing the energy to eject fluid within the chamber from the ejection port.

REFERENCES:
patent: 4199767 (1980-04-01), Campbell et al.
patent: 5072241 (1991-12-01), Shibaike et al.
patent: 5500658 (1996-03-01), Hattori et al.
patent: 5841452 (1998-11-01), Silverbrook
patent: 7712872 (2010-05-01), Silverbrook
patent: 0478956 (1992-04-01), None

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