Patent ID: 8061809
Filing Date: 2011-11-22
Classification: B41J

Abstract:
1. A liquid ejection head comprising: a substrate having a supply port through which liquid is supplied and a plurality of energy generating elements provided along the supply port and generating energy for ejecting the liquid; a nozzle plate, disposed on the substrate, having nozzles provided therein in correspondence with the energy generating elements; and a channel provided between the substrate and the nozzle plate, wherein the nozzle plate has a groove surrounding the channel and extending through the nozzle plate, the groove including a first groove portion provided in one surface of the nozzle plate at which the nozzle plate is bonded to the substrate, and a second groove portion provided in another surface of the nozzle plate in which the nozzles are provided, and wherein openings of the first groove portion in the one surface have a sawtooth shape with a number of notches and openings of the second groove portion in the another surface are substantially straight.