Printhead chip that incorporates covering formations for actuators of the printhead chip
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United States of America Patent
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Dec 23, 2003
Issued Date -
N/A
app pub date -
Nov 23, 2002
filing date -
Jul 15, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A printhead chip for an inkjet printhead includes a substrate. A plurality of nozzle arrangements is positioned on the substrate. Each nozzle arrangement includes nozzle chamber walls and a roof that define a nozzle chamber with the roof defining an ink ejection port in fluid communication with the nozzle chamber. An ink-ejecting member is positioned in the nozzle chamber. The ink-ejecting member is operatively positioned with respect to the nozzle chamber and is displaceable with respect to the substrate to eject ink from the ink ejection port. An actuator is connected to the ink-ejecting member, the actuator being displaceable upon receipt of an electrical drive signal to displace the ink-ejecting member and thus eject ink from the ink ejection port. A covering formation is positioned on the substrate so that the substrate and the covering formation define an air chamber, the actuator being positioned within the air chamber.
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