Ink jet printhead chip with volumetric ink ejection mechanisms
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United States of America Patent
Stats
-
Feb 27, 2007
Grant Date -
Dec 8, 2005
app pub date -
Aug 12, 2005
filing date -
Jun 9, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
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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