Restriction within fluid cavity of fluid drop ejector
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United States of America Patent
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Aug 6, 2002
Grant Date -
N/A
app pub date -
Sep 28, 2001
filing date -
Sep 28, 2001
priority date (Note) -
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status (Latency Note)
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Abstract
A fluid drop ejector adapted to eject droplets of a fluid includes a substrate having a fluid cavity defined therein, a flexible membrane supported by the substrate, and an actuator associated with the flexible membrane. The flexible membrane has an orifice defined therein which communicates with the fluid cavity and the actuator is adapted to deflect the flexible membrane relative to the substrate to eject droplets of the fluid through the orifice in response to an electrical signal applied to the actuator. A restriction is positioned within the fluid cavity opposite the orifice so as to define a confining region of the fluid cavity adjacent the orifice. As such, a perimeter of the restriction is spaced from a sidewall of the fluid cavity.
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