Fluid ejection device with electrodes to generate electric field within chamber
AssigneeHewlett-Packard Development Company, L.P.
InventorsQingqiao Wei, Michael W. Cumbie
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Abstract
A fluid ejection device includes a chamber, and first and second electrodes configured to generate an electric field within the chamber. A related method includes, in a firing chamber, separating whole ink into colloidal particles and ink vehicle such that the firing fluid within the chamber comprises primarily ink vehicle.
Claims12
A fluid ejection device comprising:
- a chamber;
- a first electrode comprising a firing surface formed on a silicon substrate;
- and
- a second electrode that is in-plane with the firing surface and that is an exposed portion of the silicon substrate which forms a side of an ink slot, or is a metal trace disposed near the firing surface on the silicon substrate;
- wherein the first and second electrodes are configured to generate an electric field perpendicular to the firing surface within the chamber.
A method to reduce kogation in a fluid ejection device, comprising separating whole ink into colloidal particles and ink vehicle in the vicinity of a firing surface such that firing fluid comprises primarily ink vehicle.
An inkjet printing system comprising:
- a fluid ejection device having a chamber and a heating element;
- and
- first and second electrodes disposed within the chamber, wherein the heating element is formed on a silicon substrate and comprises the first electrode, and the second electrode is in-plane with the heating element and is an exposed portion of the silicon substrate which forms a side of an ink slot, or is a metal trace disposed near the heating element on the silicon substrate, and wherein the electrodes are configured to generate an electric field perpendicular to the heating element.
Dependencies are inferred from the claim text.