Patent ID: 7066579

Claim:
An inkjet printhead integrated circuit that comprises a substrate that defines a plurality of ink passages; an array of control and drive circuits positioned on the substrate, each control and drive circuit having a drive transistor that includes a series of parallel traces; an array of inkjet nozzles arranged on the substrate, each inkjet nozzle including a nozzle chamber structure that defines a nozzle chamber in fluid communication with a respective ink passage and an ink ejection port in fluid communication with the nozzle chamber; and a plurality of elongate actuators, each actuator anchored to the substrate at a fixed end and overlying and spaced from, an associated control and drive circuit, and including a heater element for differential thermal expansion and contraction and thus displacement of the actuator, the heater element having a series of corrugations corresponding with respective traces of the drive transistor; and a plurality of ink displacement members received in respective nozzle chambers and movable to eject ink from the ink ejection ports, the ink displacement members being connected to respective actuators at opposite free ends.