Toshiba Tec Kabushiki Kaisha

Riso Technologies Corporation

Takashi Tozuka

Noboru Nitta

Keita Takahashi

Minoru Koyata

Tsubasa Konishi

According to one embodiment, a liquid ejection head includes a substrate with a hole, a nozzle plate with a plurality of nozzles, and an actuator on a first surface of the substrate. The actuator has a plurality of pressure chambers aligned to the plurality of nozzles. An electrode has a first portion on the first surface of the substrate and a second portion on a second surface of the substrate. The second surface is on an opposite side of the substrate from the first surface. A manifold has a first liquid hole facing the hole in the substrate and a second liquid hole facing another portion of the substrate other than the hole. A shielding member is between the substrate and the manifold and covers the second liquid hole.

Liquid ejection head

A liquid ejection head includes a plate with a plurality of nozzles arranged along a first direction through which liquid is ejected. A substrate is on the plate and includes a hole extending along the first direction by which the liquid is supplied. An actuator is on the substrate along the hole. The actuator has a plurality of pressure chambers, from which the liquid from the hole is ejected by the nozzles, and a plurality of air chambers. Each air chamber is between two of the pressure chambers that are adjacent to each other. A plurality of individual electrodes is formed on the substrate and each is connected to a corresponding one of the pressure chambers. A common electrode is formed on the substrate and an inner peripheral surface of the hole.

According to one embodiment, a method for manufacturing an inkjet head includes attaching a piezoelectric body facing the substrate, forming slanting side surfaces on the piezoelectric body, the slanting side surfaces extending between a first surface and a second surface of the piezoelectric body such that first surface has a remaining area that is less that a remaining area of second surface, forming a groove in the piezoelectric body from the first surface towards the second surface, the groove passing through two slanting side surfaces on opposite sides of the piezoelectric body, forming a conductive film on an inner surface of the groove, trimming portions of the conductive film proximate to the first surface and the slanting side surfaces such that the conductive film is separated from the first surface and the slanting side surfaces at outer edges of the groove, and forming an insulating film over the conductive film.

Growing community of inventors

Sunto Shizuoka, Japan

Takashi Tozuka