Patent ID: 6557970
Filing Date: 2003-05-06
Classification: B41J,Y10T

Abstract:
An ink jet printhead which comprisesat least one printhead chip that comprises a wafer substrate; a plurality of nozzle arrangements positioned on the wafer substrate, each nozzle arrangement having nozzle chamber walls and a roof wall that define a nozzle chamber and a nozzle opening in fluid communication with said nozzle chamber; and an actuator that is operatively arranged with respect to each nozzle arrangement to eject ink from said nozzle chamber through the nozzle opening on demand; and a nozzle guard positioned over the printhead chip, the nozzle guard comprising a support structure that extends from the printhead chip; and a planar cover member positioned on the support structure, the planar cover member defining a plurality of passages, each passage being in register with a respective nozzle opening, the planar cover member being less than approximately 300 microns thick.