Patent ID: 7465029
Filing Date: 2008-12-16
Classification: B41J,Y10T

Abstract:
1. A micro-electromechanical nozzle arrangement for an inkjet printhead, said arrangement comprising: a substrate having a layer of drive circuitry and defining an ink chamber with an ink supply channel etched through the substrate; a roof structure connected to the drive circuitry layer and covering the ink chamber, the roof structure defining a fluid ejection nozzle rim above said chamber; and a plurality of actuators radially spaced about, and displaceable with respect to, the nozzle rim, each actuator configured to thermally expand upon receiving current from the drive circuitry thereby moving said actuators into the chamber and operatively increasing a fluid pressure inside the chamber to eject a drop of ink via the ejection nozzle, wherein the substrate defines a number of vias through which the drive circuitry is connected to the actuators.