Ink jet nozzle arrangement configuration
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United States of America Patent
Stats
-
Jan 27, 2004
Issued Date -
N/A
app pub date -
Jun 28, 2002
filing date -
Mar 25, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ink jet printhead chip includes a wafer substrate. Drive circuitry is positioned on the wafer substrate. A plurality of nozzle arrangements is positioned on the wafer substrate. Each nozzle arrangement includes nozzle chamber walls and a roof wall positioned on the wafer substrate to define a nozzle chamber and an ink ejection port in the roof wall. A micro-electromechanical actuator is connected to the drive circuitry. The actuator includes a movable member that is displaceable on receipt of a signal from the drive circuitry. The movable member defines a displacement surface that acts on ink in the nozzle chamber to eject the ink from the ink ejection port. An area of the displacement surface is between half and twice a cross sectional area of the ink ejection port.
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Cited Art Landscape
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