NOZZLE GUARD FOR A PRINTHEAD

摘要

An ink jet printhead has a number of printhead chips. Each printhead chip has a wafer substrate. A plurality of nozzle arrangements is positioned on the wafer substrate. Each nozzle arrangement has nozzle chamber walls and a roof wall that define a nozzle chamber and a nozzle opening in fluid communication with the nozzle chamber. An actuator is operatively arranged with respect to each nozzle arrangement to eject ink from the nozzle chamber through the nozzle opening. A nozzle guard is positioned over the printhead chip. The nozzle guard has a support structure and a planar cover member. The planar cover member is positioned on the support structure. The planar cover member defines a plurality of passages. Each passage is in register with a respective nozzle opening. The planar cover member is less than 300 microns thick.