Patent ID: 7004576

Claim:
An ink-jet printhead, comprising: a cavity unit and an actuator stacked together, said cavity unit being provided with a row of nozzle orifices and a row of pressure chambers communicating with the respective nozzle orifices, said actuator having a plurality of active portions for selectively actuating the respective pressure chambers to eject ink through the respective nozzle orifices, wherein said cavity unit is a stack of plates including: a cavity plate formed with said pressure chambers; a manifold plate formed with a manifold chamber that supplies the ink from an external ink supply source to each of said pressure chambers; and an intervenient plate interposed between said cavity plate and said manifold plate, said intervenient plate being formed with a filter portion that filters the ink supplied from the external ink supply source to said manifold chamber, said intervenient plate being formed with a damper wall facing said manifold chamber, said damper wall having a partial thickness of said intervenient plate.