Back to results
US 2010/0149282 A1Published application
Printhead nozzle cell having photoresist chamber
AssigneeSilverbrook Research Pty Ltd
InventorKia Silverbrook
Life of this patent
Estimating the term…
Abstract
A nozzle cell of a printhead is provided which has a multi-layer substrate defining a fluid inlet, side walls extending from the substrate around the fluid inlet and comprising walls of silicon nitride encapsulating hardened photoresist, an apertured roof supported by the side walls to define a chamber, and a heater within the chamber, the heater heating the fluid in the chamber so that bubbles are generated therein to cause ejection of the fluid from a nozzle defined with the apertured roof.
Claims3
A nozzle cell of a printhead, the unit cell comprising:
- a multi-layer substrate defining a fluid inlet;
- side walls extending from the substrate around the fluid inlet, the side walls comprising walls of silicon nitride encapsulating hardened photoresist;
- an apertured roof supported by the side walls to define a chamber;
- and
- a heater within the chamber, the heater heating the fluid in the chamber so that bubbles are generated therein to cause ejection of the fluid from a nozzle defined with the apertured roof.
2 more elements
Dependencies are inferred from the claim text.