Liquid ejection head

Abstract

A liquid ejection head includes 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 having nozzles provided therein in correspondence with the energy generating elements, and a channel provided between the substrate and the nozzle plate. The nozzle plate has a groove surrounding the channel. The groove includes a first groove provided in one surface of the nozzle plate at which the nozzle plate is bonded to the substrate, and a second groove provided in another surface of the nozzle plate in which the nozzles are provided. Edges of the first groove have sawtooth shape with a number of very small notches and edges of the second groove are substantially straight.

Dependencies are inferred from the claim text.