Patent ID: 7032998
Filing Date: 2006-04-25
Classification: B41J,B82Y,G06F,G06K,G11C,H04N

Abstract:
1. An ink jet printhead chip which comprises a wafer substrate; a drive circuitry layer that is positioned on a first side of the wafer substrate, the wafer substrate and the drive circuitry layer defining a plurality of ink ejection channels that extend from the first side of the wafer substrate to a second, opposite, side of the wafer substrate; a plurality of nozzle chamber structures positioned on said first side of the wafer substrate, each nozzle chamber structure defining a nozzle chamber containing ink in fluid communication with a respective ink ejection channel, each nozzle chamber structure comprising: a plurality of ink ejection mechanisms operatively engaged with respective nozzle chamber structures and operable to eject the ink contained in the respective nozzle chambers from the respective ink ejection channels at the second side of the wafer substrate; and a plurality of micro-electromechanical actuators connected to the drive circuitry layer and connected to respective ink ejection mechanisms to operate the ink ejection mechanisms on receipt of an electrical signal from the drive circuitry layer.