Ricoh Company, Ltd.

Takuma Hirabayashi

Takahiko Kuroda

Toshiaki Masuda

Osamu Machida

Masahiro Ishimori

Shuya Abe

Akio Yoshita

Atsushi Takeuchi

Akira Shimofuku

Keishi Miwa

Naoya Kondo

Ryohta Yoneta

Yukimasa Matsuda

Kazuto Nagahashi

Hiromichi Hirano

A liquid discharge head includes: an actuator substrate; an electromechanical transducer held by the actuator substrate; a damper; and a damper holding substrate holding the damper, wherein the damper disposed between the actuator substrate and the damper holding substrate and joined to the actuator substrate and the damper holding substrate with an adhesive, the damper has a joint portion having a recess or a through hole.

Liquid discharge head, liquid discharge device, and liquid discharge apparatus

A liquid discharge head includes: a support member including a first recess and a second recess; and a damper member bonded to the support member, the damper member including a damper membrane, wherein the first recess faces the damper membrane, and the second recess is closer to an end of the support member than the first recess in a longitudinal direction of the support member, and the second recess does not face the damper membrane.

Liquid discharge head, head module, liquid discharge unit, and liquid discharge apparatus

A liquid discharge head includes a piezoelectric element configured to vibrate; a damper configured to reduce vibration energy generated by the piezoelectric element; a first substrate joined to the damper, the first substrate having a first space facing one surface of the damper vibrates; a second substrate opposite to the first substrate via the damper, the second substrate having: a recess accommodating the piezoelectric element, and a second space facing another surface of the damper, the second space disposed opposite to the first space via the damper and a leg between the damper and the second substrate the leg joined to the second substrate with an adhesive including a filler.

An actuator includes: a frame having a recess; an actuator substrate including a common chamber; a damper between the frame and the actuator substrate, the damper defining a part of a wall of the common chamber of the actuator substrate. The damper includes multiple layers laminated in a lamination direction, and the multiple layers is symmetrical in the lamination direction with respect to a center of the damper in the lamination direction.

Actuator, liquid discharge head, liquid discharge device, and liquid discharge apparatus

A liquid discharge head having a nozzle substrate including a nozzle from which a liquid is discharged in a liquid discharge direction, a pressure chamber communicating with the nozzle, a diaphragm defining a part of wall of the pressure chamber, and a pressure generator on a first surface of the diaphragm opposite to a second surface of the diaphragm facing the pressure chamber, the pressure generator configured to deform the diaphragm. A gap between a first line and a second line is 40 μm or less in a direction perpendicular to the liquid discharge direction, where the first line extends, in the liquid discharge direction, from a displacement center at which the diaphragm deforms with a maximum displacement amount, and the second line extends from a central position of the nozzle in the liquid discharge direction.

Liquid discharge head, head module, head device, liquid discharge device, and liquid discharge apparatus

An electromechanical transducer element includes an electromechanical transducer film including a complex oxide that has a perovskite structure containing at least Pb, Zr and Ti; a pair of electrodes disposed to sandwich the electromechanical transducer film; and an insulating protective film covering the electromechanical transducer film and the pair of electrodes. Pb content of the electromechanical transducer film is uniform in a film thickness direction of the electromechanical transducer film, and a density of leak current measured between the pair of electrodes is 4.2&#xd7;10A/cmor less in an environment in which a water vapor pressure is 300 kPa.

Electromechanical transducer element, liquid discharge head, liquid discharge apparatus

An electromechanical transducer element includes a first electrode on a substrate, an electromechanical transducer film on the first electrode, and a second electrode on the electromechanical transducer film. The electromechanical transducer film includes a thin line pattern. The thin line pattern includes a plurality of thin lines that are spaced away from each other.

Electromechanical transducer element, method of producing the element, liquid discharge head incorporating the element, and liquid discharge apparatus incorporating the head

There is provided a method of producing an electromechanical transducer that includes a plurality of electromechanical transducer elements on a substrate. The method includes forming a plurality of individual electrodes corresponding to the plurality of electromechanical transducer elements on the substrate, forming an insulation film to cover the plurality of individual electrodes on the substrate, forming a conductive film on the insulation film, forming a plurality of openings to expose the plurality of individual electrodes in each of the insulation film and the conductive film, and forming a plurality of electromechanical transducer films on the plurality of individual electrodes exposed in the plurality of openings.

Growing community of inventors

Kanagawa, Japan

Takuma Hirabayashi