Fluid dispenser with low surface energy orifice layer for precise fluid dispensing
AssigneeHewlett-Packard Development Company, L.P.
InventorsJeffrey A. Nielsen, Jeremy Hartan Donaldson, Benjamin Clark, Debora J. Thomas
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Abstract
The present invention is embodied in a method for precisely dispensing fluid, including treating an orifice of a fluid dispensing apparatus during a fabrication process by applying a low surface energy material layer onto the orifice, adjusting a thickness of the low surface energy material coating to a predetermined threshold and limiting backpressure of a low dead volume fluid delivery system coupled to the orifice to reduce interference or interruptions for precisely dispensing the fluid.
Claims20
A method for precisely dispensing fluid, comprising:
- treating an orifice of a fluid dispensing apparatus during a fabrication process by applying a low surface energy material layer onto the orifice;
- adjusting a thickness of the low surface energy material layer to a predetermined threshold;
- and
- limiting backpressure of a low dead volume fluid delivery system coupled to the orifice to reduce interference or interruptions for precisely dispensing the fluid.
A fluid dispensing device for dispensing fluid with reduced pooling, comprising:
- a thermal inkjet printhead;
- a low dead volume fluid delivery system located within the thermal inkjet printhead and including a reservoir fluid receptacle configured to hold and supply fluid, wherein the drop ejectors are configured to operate in the absence of substantial back pressure control;
- a drop ejector having a low surface energy orifice layer, wherein the drop ejector is configured to receive the fluid from the fluid receptacle and the low surface energy orifice layer is configured to eject fluid drops;
- and
- a control system configured to precisely initiate a dispensing operation and dispense fixed or varying precise quantities of the fluid drops.
A fluid dispensing tool for dispensing fluid upon fluid receptacles, comprising:
- a control system configured to precisely control a dispensing operation;
- plural drop ejectors, each having at least one orifice, the plural drop ejectors configured to dispense fixed or varying quantities of fluid upon the fluid receptacles;
- plural disposable low surface energy orifice layers located on respective orifices and configured to reduce fluid adhesion to the respective orifices;
- and
- a low dead volume fluid delivery system located adjacent to the drop ejectors and configured, wherein the drop ejectors are configured to operate in the absence of substantial back pressure control.
Dependencies are inferred from the claim text.