Inkjet nozzle assembly incorporating s fluidic seal

摘要

An inkjet nozzle assembly for a printhead integrated circuit is configured to be replicated on a wafer substrate incorporating drive circuitry so that the printhead integrated circuit comprises an array of the nozzle assemblies. The nozzle arrangement includes a static nozzle chamber structure extending from the wafer substrate and bounding an ink inlet channel defined through the wafer substrate. A dynamic nozzle chamber structure is arranged on the static nozzle chamber structure so that the static and dynamic nozzle chamber structures together define a nozzle chamber in fluid communication with the ink inlet channel. The dynamic nozzle chamber structure defines an ink ejection port and is displaceable relative to the substrate so that ink is ejected from the ink ejection port due to volumetric change in the nozzle chamber. An actuating mechanism is fast with the substrate and the dynamic nozzle chamber structure and is electrically connected to the drive circuitry to receive drive signals from the drive circuitry so that the dynamic nozzle chamber structure is reciprocally displaced to eject ink from the ink ejection port. The dynamic and static nozzle chamber structures are configured to define a fluidic seal interposed between the structures when the nozzle chamber is filled with ink.