Patent ID: 6648453
Filing Date: 2003-11-18
Classification: B41J,B42D,B82Y,G03B,G06F,G06K,G06T,G07F,G09G,G11C,H01L,H04N,H05K,Y10T

Abstract:
An ink jet printhead chip that comprisesa wafer substrate, a CMOS drive circuitry layer positioned on the wafer substrate, and a plurality of nozzle arrangements positioned on the wafer substrate and the CMOS drive circuitry layer, each nozzle arrangement comprising nozzle chamber walls and a roof wall that define a nozzle chamber and an ink ejection port defined in the roof wall, and a micro-electromechanical actuator connected to the CMOS drive circuitry layer and that has at least one movable member that is positioned to act on ink in the nozzle chamber to eject the ink from the ink ejection port on receipt of a signal from the drive circuitry layer, the, or each, movable member being spaced between 2 microns and 15 microns from the CMOS drive circuitry layer.