Radially actuated micro-electromechanical nozzle arrangement

Details Radially actuated micro-electromechanical nozzle arrangement Radially actuated micro-electromechanical nozzle arrangement

2008-02-04

2008-12-16

Do, An H (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S065000

Reexamination Certificate

active

07465029

ABSTRACT:
This invention relates to a micro-electromechanical nozzle arrangement for an inkjet printhead. The arrangement includes a substrate having a layer of drive circuitry and defining an ink chamber with an ink supply channel etched through the substrate. The arrangement also includes a roof structure connected to the drive circuitry layer and covering the ink chamber, the roof structure defining a fluid ejection nozzle rim above said chamber. Also included is a plurality of actuators radially spaced about, and displaceable with respect to, the nozzle rim, each actuator configured to thermally expand upon receiving current from the drive circuitry thereby moving said actuators into the chamber and operatively increasing a fluid pressure inside the chamber to eject a drop of ink via the ejection nozzle. The substrate defines a number of vias through which the drive circuitry is connected to the actuators.

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