Patent Number: 8,870,346

Title: Liquid ejection head and image forming apparatus including same

Abstract: A liquid ejection head includes a nozzle plate having a plurality of nozzles formed therein from which droplets are ejectable. The nozzle plate includes a nozzle substrate in which a plurality of nozzle holes each constituting a nozzle is formed, and a liquid-repellent film formed on a surface of the nozzle substrate on a droplet ejection side of the nozzle plate and on an inner wall of the nozzle on at least the droplet ejection side of the nozzle plate. A number of liquid-repellent groups per unit area in the liquid-repellent film formed on the inner wall of the nozzle decreases continuously from the droplet ejection side of the nozzle plate to a side opposite the droplet ejection side of the nozzle plate.

Inventors: Kimura; Yuu (Kanagawa, JP)

Assignee: Ricoh Company, Ltd.

International Classification: B41J 2/14 (20060101)

Expiration Date: 2018-10-28 0:00:00