Patent ID: 9365040
Filing Date: 2016-06-14
CPC Classification: B41J

Claim Text:
1. A liquid ejection head, comprising: a nozzle plate having a plurality of nozzles formed therein from which droplets are ejectable, comprising: a circumferential portion around each nozzle on the droplet ejection side of the nozzle plate smoothly recessed toward an edge portion of the nozzle, wherein the edge portion of the nozzle is smoothly continuous with the inner wall of the nozzle hole, and the nozzle hole extending from the droplet ejection side of the nozzle plate to an opposite side of the nozzle plate, wherein the liquid-repellent film has a uniform thickness formed across the nozzle plate on the droplet ejection side of the nozzle plate to at least the edge portion of the nozzle, wherein the liquid-repellent film is formed also on the inner wall of the nozzle hole, and the liquid-repellent film formed also on the inner wall of the nozzle hole is gradually thinned in a direction reverse to that in which the droplets are ejected from the nozzle hole, and wherein the liquid-repellant film extends farther than the base film in the direction reverse to that in which the droplets are ejected from the nozzle hole, and extension of the liquid-repellent film in the reverse direction ends prior to reaching the opposite side of the nozzle plate.