Fluidically damped printhead

A printhead for an inkjet printer, the printhead comprising:

• a printhead integrated circuit (IC) with a plurality of arrays of nozzles for ejecting ink;
• and
• a support structure for supporting the printhead IC, the support structure having ink conduits formed therein, each ink conduit supplying one of the plurality of arrays of nozzles with ink, an upstream end of each ink conduit is supplied with ink from an ink supply and a downstream end of each ink conduit feeds to a waste ink outlet, a roof of each ink conduit having an array of cavities defined therein distributed along the length of each ink conduit, each ink conduit further having a weir proximal to the downstream end of the ink conduit for damming ink in the ink conduit, wherein a separate pocket of gas is captured in each cavity when the ink is dammed by the weir, the pockets of gas being compressed by pressure pulses in the ink within the ink conduits to dissipate the pressure pulses.