Printhead integrated circuit having ink ejecting thermal...

Details Printhead integrated circuit having ink ejecting thermal... Printhead integrated circuit having ink ejecting thermal...

2006-11-07

2006-11-07

Do, An H. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S065000

Reexamination Certificate

active

07131717

ABSTRACT:
An inkjet printhead integrated circuit is provided including a substrate defining ink supply channels, a drive circuitiy layer positioned on the substrate, and nozzle arrangements positioned on the substrate electrically connected to the drive circuitry. Each nozzle arrangement includes a nozzle chamber defined by the substrate, a roof structure positioned over the chamber defining an ink ejection port, and a thermal actuator positioned in the roof. A portion of the actuator is made of a material which expands when heated and the actuator is arranged to receive an electrical current from the drive circuitry to heat the portion. Upon receipt of the current, the actuator is configured to be displaceable towards the substrate so as to reduce a volume of the chamber. Upon cessation of the current, the actuator is configured to be displaceable back to its original position so that ink is ejected from the ejection port.

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