Patent ID: 6955418

Claim:
An ink-jet printhead comprising: a cavity unit including: a plurality of nozzles; a plurality of pressure chambers arrayed in a line, each pressure chamber communicating with a corresponding nozzle; a manifold plate formed with a manifold chamber that supplies ink to the plurality of pressure chambers, a depth of the manifold chamber being substantially equal to a thickness of the manifold plate; and a damper plate formed with a recess on a side facing away from the manifold chamber and a damper wall disposed on a side facing the manifold chamber to have a partial thickness of the damper plate, the recess having an outline shape that is substantially equal to or greater than an outline shape of the manifold chamber in the manifold plate in a plan view of the cavity unit; and an actuator stacked on the cavity unit and having active portions placed at the respective pressure chambers and selectively driven to eject the ink in the pressure chambers through the nozzles, wherein the cavity unit further includes a cover plate that is bonded to the damper plate to seal the recess in the damper plate and the nozzles are formed in a nozzle plate and the nozzle plate is bonded to the cover plate.