Inkjet printhead integrated circuit having an array of...

Details Inkjet printhead integrated circuit having an array of... Inkjet printhead integrated circuit having an array of...

2006-06-27

2006-06-27

Tran, Huan (Department: 2861)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S042000

Reexamination Certificate

active

07066579

ABSTRACT:
An inkjet printhead integrated circuit includes a substrate that defines a plurality of ink passages. An array of control and drive circuits is positioned on the substrate, each control and drive circuit having a drive transistor that includes a series of parallel traces. An array of inkjet nozzles is arranged on the substrate, each inkjet nozzle including a nozzle chamber structure that defines a nozzle chamber in fluid communication with a respective ink passage and an ink ejection port in fluid communication with the nozzle chamber. Each of a plurality of elongate actuators is anchored to the substrate at a fixed end and overlies and is spaced from, an associated control and drive circuit. Each actuator includes a heater element for differential thermal expansion and contraction and thus displacement of the actuator. Each heater element has a series of corrugations corresponding with respective traces of the drive transistor. A plurality of ink displacement members is received in respective nozzle chambers. Each ink displacement member is movable to eject ink from the ink ejection ports. The ink displacement members are connected to respective actuators at opposite free ends.

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