Ricoh Company, Ltd.

Yoshihide Niisato

Kaname Morita

Kenshiroh Munetomo

Yohsuke Kobayashi

A liquid discharge head includes a nozzle substrate and a cover member. The nozzle substrate includes a liquid discharge surface, a plurality of nozzles, and a continuous recess. The plurality of nozzles is arranged in a nozzle arrangement area on the liquid discharge surface and configured to discharge liquid from the liquid discharge surface. The continuous recess surrounds the nozzle arrangement area on the liquid discharge surface. The cover member is joined to the nozzle substrate with the nozzle arrangement area being exposed. The nozzle arrangement area has a liquid repellency with respect to the liquid. An inside of the recess is lyophilic to the liquid and is provided with an adhesive, and the nozzle substrate is joined to the cover member with the adhesive.

Liquid discharge head, head module, and liquid discharge apparatus

A metal member includes an alloy containing platinum-group metal. An amount of the platinum-group metal in an outermost surface of the metal member is higher than the amount of the platinum-group metal in an interior of the metal member.

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Kanagawa, Japan

Yoshihide Niisato