Ink jet printhead chip with volumetric ink ejection mechanisms

Details Ink jet printhead chip with volumetric ink ejection mechanisms Ink jet printhead chip with volumetric ink ejection mechanisms

2007-02-27

2007-02-27

Do, An H. (Department: 2853)

Incremental printing of symbolic information

Ink jet

Ejector mechanism

C347S065000

Reexamination Certificate

active

11202331

ABSTRACT:
An inkjet printhead chip includes a substrate that defines a plurality of ink supply channels. A drive circuitry layer is positioned in the substrate. A plurality of nozzle arrangements is positioned on the substrate. Each nozzle arrangement includes a nozzle chamber structure arranged on the substrate and defining walls of a nozzle chamber in fluid communication with a respective ink supply channel. A deformable roof structure is arranged on the nozzle chamber structure. The roof structure is deformable on receipt of an actuating signal from the drive circuitry, reciprocally to reduce and enlarge a volume of the nozzle chamber. The roof structure defines an ink ejection port such that, upon such reduction and enlargement, a drop of ink is ejected from the ink ejection port.

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