Patent ID: 8317302

Claim:
A fluid ejection module, comprising: a die having a plurality of substantially identical individually actuatable fluid ejector units formed therein, each fluid ejector unit including: a flow path formed therethrough, the flow path including a pumping chamber fluidically connected to a nozzle; and an actuator assembly including a membrane providing a wall of the pumping chamber and an actuator, the actuator assembly configured to eject fluid from the pumping chamber through an associated nozzle; wherein the plurality of individually actuatable fluid ejector units includes a plurality of individually actuatable first fluid ejector units and at least one second fluid ejector unit, wherein the actuator assembly of the at least one second fluid ejector unit includes a material deposited on the actuator such that the actuator assembly of the at least one second fluid ejector unit is stiffer than the actuator assemblies of the first fluid ejector units.