Inkjet printhead having thermal bend actuator heating...

Details Inkjet printhead having thermal bend actuator heating... Inkjet printhead having thermal bend actuator heating...

2006-09-26

2006-09-26

Hsieh, Shih-Wen (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

Reexamination Certificate

active

07111924

ABSTRACT:
An ink jet printhead includes a number of nozzle devices formed on a substrate. Each nozzle device has a nozzle chamber, a nozzle opening through which ink from the nozzle chamber is ejected, a movable element in contact with ink in the nozzle chamber to cause the ejection of ink and thermal bend actuator. The thermal bend actuator has a proximal end anchored to the substrate and a distal end connected to the moveable element. The actuator includes a first portion adjacent the proximal end and having a conducting heating circuit layer for heating the actuator. A second end portion of the actuator extends to the movable element and is in contact with ink in the chamber. A dielectric slot electrically isolates the first and second portions so that electric energy in the heating circuit layer is not conducted by the actuator to the ink in the chamber.

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