Patent ID: 7524030

Claim:
A nozzle arrangement for ejecting ink, the nozzle arrangement comprising: a substrate assembly defining an ink supply passage and incorporating a drive circuitry layer; a heater positioned on the substrate assembly and having a heater element terminating in a pair of oppositely arranged electrical contacts that are electrically coupled to the drive circuitry layer; and a nozzle chamber structure extending from said heater to define a nozzle chamber in fluid communication with the ink supply passage and in which the heater element is located, the nozzle chamber structure defining an aperture through which ink in the nozzle chamber can be ejected when current is supplied from the drive circuitry layer to the heater element, wherein the heater element is elongate and of substantially uniform cross-sectional area, and the electrical contacts each have an enlarged cross-sectional area relative to the cross-section area of the heater element.