Patent ID: 7347535
Filing Date: 2008-03-25
Classification: B41J

Abstract:
1. A liquid-ejection integrated circuit device that comprises a substrate that defines a plurality of ink inlet channels; integrated circuitry positioned on the substrate; a plurality of nozzle chamber structures positioned on the substrate, each nozzle chamber structure defining a nozzle chamber in fluid communication with a respective liquid inlet channel and a liquid ejection port in fluid communication with the nozzle chamber; a plurality of liquid ejection members positioned in respective nozzle chambers and displaceable to eject liquid from the liquid ejection ports; and a plurality of elongate actuators, each elongate actuator being fast, at one end, to the substrate to receive drive signals from the integrated circuitry and, at the other end, to a respective liquid ejecting member, the actuators and the liquid ejecting members having substantially the same composition of a structural layer interposed between a first conductive layer and a second conductive layer, the first conductive layer defining a heating circuit connected to the integrated circuitry and a discontinuation between the heating circuit and the liquid ejection member electrically to isolate the heating circuit from the liquid in the nozzle chamber.