Patent ID: 7575298
Filing Date: 2009-08-18
Classification: B41J,Y10T

Abstract:
1. An inkjet printhead comprising: a wafer having a droplet ejection side and a liquid supply side opposite the droplet ejection side, a plurality of nozzles formed on the droplet ejection side of the wafer, a plurality of individual liquid passages corresponding to each nozzle respectively, each of the individual liquid passages leading to each nozzle respectively for providing ejectable liquid to the associated nozzle; and droplet ejection actuators and associated drive circuitry corresponding to each nozzle respectively, the droplet ejection actuators and associated drive circuitry being formed on the droplet ejection side of the wafer such that the droplet ejection actuators are positioned between the droplet ejection side of the wafer and the plurality of nozzles; wherein, each of the individual liquid passages has a hole extending into the wafer from the liquid supply side of the wafer to form a fluid connection with the hole; and wherein, the droplet ejection actuators are thermal bend actuators.