Inkjet printhead integrated circuit with rectifying valves

摘要

Provided is a unit cell arrangement for an inkjet printhead. The unit cell arrangement includes a substrate that defines an ink inlet and sidewalls supporting a roof portion on the wafer substrate to form an ink chamber. The roof portion defines at least one nozzle rim. The unit cell also includes a heater element suspended in the chamber between the sidewalls for thermal cavitation of ink in the chamber to facilitate ink ejection via the nozzle rim. Further included is a rectifying valve arranged in the ink inlet to provide decreased hydraulic resistance to ink flowing into the chamber than ink flowing out of the chamber in order to reduce fluidic cross talk between chambers of similar unit cells on the substrate and to improve ink refill times of the chambers.