Abstract: A liquid ejecting head capable of suppressing an increase in size in a configuration in which a liquid circulates between the liquid ejecting head and a liquid storage portion and a liquid ejecting apparatus are provided. Pressures chambers communicating with nozzles that eject a liquid, a first common flow path through which the liquid is supplied to the pressure chambers side, a second common flow path through which the liquid is led out from the pressure chambers side, a first compliance portion that deforms in response to a pressure change in the liquid inside the first common flow path, and a second compliance portion that deforms in response to a pressure change in the liquid inside the second common flow path are provided. The first compliance portion and the second compliance portion overlap each other when viewed in a thickness direction of at least one of the compliance portions.

Abstract: when one of two positions in a second direction intersecting the first direction is defined as a first position and the other position is defined as a second position from which the shortest distance to the partition wall is shorter than the shortest distance from the first position to the partition wall, the vibrating plate has a first portion corresponding to the first position and a second portion corresponding to the second position, and a surface of the first portion in the first direction is, in the first direction, closer than a surface of the second portion in the first direction.

Abstract: A liquid ejecting head includes: an actuator including a piezoelectric element and a vibrating plate; and a pressure chamber substrate including a pressure chamber whose volume changes when the vibrating plate deforms, in which 0.35×FR1?FR2<1.00×FR1, where one position in a longitudinal direction of the pressure chamber is a first position, another position closer than the first position to an end of the pressure chamber in the longitudinal direction of the pressure chamber is a second position, bending rigidity of the actuator in the thickness direction at the first position is FR1, and bending rigidity of the actuator in the thickness direction at the second position is FR2.

Abstract: The plurality of pressure compartments includes a first pressure compartment and a second pressure compartment located next to the first pressure compartment in the first direction. The plurality of nozzles includes a first nozzle that is in communication with the first pressure compartment and the second pressure compartment in a shared manner. The piezoelectric element includes a first active region where the piezoelectric body is sandwiched between the common electrode and, among the plurality of individual electrodes, a first individual electrode. The first active region is located to span from at least a part of the first pressure compartment to at least a part of the second pressure compartment as viewed in the second direction.

Abstract: An electronic device includes a first member configured by single crystal silicon, in which the first member includes a first surface configured by a {110} plane in the single crystal silicon, a second surface of an opposite side from the first surface, a through-hole which spans from the first surface to the second surface, a first recessed portion which is opened in the first surface and includes a wall surface configured by a {111} plane, the wall surface being inclined by an angle greater than 0° and less than 90° with respect to the first surface in the single crystal silicon, and a second recessed portion opened in the second surface, and a level difference surface having a different inclination to that of the {111} plane is provided in the middle of the wall surface of the first recessed portion in a depth direction.

Abstract: A piezoelectric device includes a diaphragm provided on a side of one surface of a substrate, and a piezoelectric actuator having a first electrode, a piezoelectric body layer, and a second electrode which are stacked in a first direction on a side of a surface opposite to the substrate of the diaphragm, in which when one area far from an end portion of the second electrode is a first area and one area near the end portion of the second electrode is a second area, of two areas of the second electrode in a second direction intersecting the first direction, the second electrode has a stiffness of 17,000 N/m or more in the second area in the first direction, which is higher than a stiffness in the first area in the first direction, and a length in the second area in the first direction is equal to or less than a length of the piezoelectric body layer in the second area in the first direction.

Abstract: A piezoelectric body layer of a first area has (100) plane preferential orientation, and a (100) plane orientation ratio of the piezoelectric body layer of a second area is lower than a (100) plane orientation ratio of the piezoelectric body layer of the first area, when one area far from an end portion of a second electrode is the first area, and one area near the end portion of the second electrode is the second area, of two areas of the second electrode in a second direction intersecting a first direction.

Abstract: A liquid discharge head includes a diaphragm, a first electrode, a piezoelectric body, and a second electrode which are stacked in this order in a first direction, in which when a region of the piezoelectric body interposed between the first electrode and the second electrode is set as a first region, a region of the piezoelectric body other than the first region is set as a second region, a portion of the diaphragm that overlaps a boundary between the first region and the second region when viewed in the first direction is set as a first portion, and a portion of the diaphragm that is different from the first portion and overlaps the first region when viewed in the first direction is set as a second portion, a thickness of the first portion is smaller than a thickness of the second portion.

Abstract: A liquid discharge head includes a diaphragm, a first electrode, a piezoelectric body, and a second electrode, which are stacked in this order in a first direction, in which when a region of the piezoelectric body interposed between the first electrode and the second electrode is set as a first region, a region of the piezoelectric body other than the first region is set as a second region, a portion of the piezoelectric body including at least a part of a boundary between the first region and the second region is set as a boundary portion, and a portion of the piezoelectric body that is different from the boundary portion and is located in the first region is set as a non-boundary portion, a dielectric constant of the boundary portion is smaller than a dielectric constant of the non-boundary portion.

Abstract: Provided is a liquid discharging head including: a nozzle discharging a liquid; a chamber plate having a plurality of pressure chambers, a drive element provided to correspond to each of the pressure chambers, and a plurality of lead electrodes for supplying an electric signal to the drive element; and a circuit substrate having a terminal coupled to the lead electrode. A first pressure chamber and a second pressure chamber communicate with the nozzle in common. The chamber plate includes a first individual lead electrode for the drive element corresponding to the first pressure chamber and a second individual lead electrode for the drive element corresponding to the second pressure chamber. The terminal of the circuit substrate is coupled so as to overlap the first individual lead electrode and the second individual lead electrode in plan view.

Abstract: The terminal portion extends onto a surface of the protrusion portion from part positioned in the second layer and corresponding to the second portion, and part on the surface of the protrusion portion contacts an electrode of the drive element.

Abstract: Provided is a liquid discharging head including a nozzle discharging a liquid; a chamber plate in which a plurality of pressure chambers are arranged side by side on a first surface side; and a flow path plate having a second surface formed with an opening of a communication flow path, wherein a first region of a partition wall between a first pressure chamber and a second pressure chamber adjacent to each other among the plurality of pressure chambers is constrained by being bonded to the second surface of the flow path plate, and a second region of the partition wall overlaps the opening of the communication flow path in plan view.

Abstract: In this liquid ejecting head, the pressure chamber extends in a second direction crossing a first direction, the first direction being a direction from the pressure chamber to the nozzle. The pressure chamber and the absorbing chamber are disposed at a same position in the first direction and next to each other in the second direction. The actuator is disposed on an opposite side in the first direction with respect to the pressure chamber. The absorption member is disposed on the opposite side in the first direction with respect to the absorbing chamber, the absorption member including at least part of members constituting the actuator.

Abstract: A liquid discharge head includes: a nozzle plate provided with a nozzle hole that discharges a liquid; a silicon substrate provided with a pressure chamber that is connected with the nozzle hole; a diaphragm provided on the silicon substrate; and a piezoelectric element that is provided on the diaphragm and that changes a volume of the pressure chamber, where: the diaphragm includes a zirconium oxide layer; the zirconium oxide layer has (?111) preferred orientation; and in X-ray diffraction of the diaphragm, a difference between a position of (002) peak of the zirconium oxide layer and a position of (220) peak of the silicon substrate is 13.26° or more and 13.30° or less.

Abstract: Provided is a liquid discharging head including: a nozzle discharging a liquid; a pressure chamber row in which a plurality of pressure chambers communicating with the nozzle are arranged side by side along a first axis direction; and a first reservoir and a second reservoir commonly communicating with the plurality of pressure chambers, in which the pressure chamber row includes a first pressure chamber communicating with the first reservoir and a second pressure chamber communicating with the second reservoir, and the liquid discharging head further comprises a communication flow path causing the first pressure chamber and the second pressure chamber to commonly communicate with one nozzle.

Abstract: Provided is a liquid discharge head that includes a nozzle plate provided with a nozzle hole that discharges a liquid, a silicon substrate provided with a pressure generating chamber that communicates with the nozzle hole, a vibration plate provided on the silicon substrate, and a piezoelectric element that is provided on the vibration plate and changes a volume of the pressure generating chamber. The piezoelectric element includes a piezoelectric layer including a composite oxide of a perovskite structure containing lead, zirconium, and titanium. A difference between a peak position derived from a (100) surface of the piezoelectric layer and a peak position derived from a (220) surface of the silicon substrate in an X-ray diffraction of the piezoelectric layer is less than 25.00°.

Abstract: A liquid discharge head that includes piezoelectric elements, a pressure chamber plate defining pressure chambers corresponding to the piezoelectric elements, and a vibrating plate disposed between the piezoelectric elements and the pressure chamber plate is provided. In the liquid discharge head, the vibrating plate has, in a first position and a second position, a first portion and a second portion that is away from the end of the pressure chamber than the first portion in a first direction and has a thickness different from a thickness of the first portion. In the first position, a width of the second portion in the first direction is a first width, and in the second position, a width of the second portion in the first direction is a second width that is less than the first width.

Abstract: A liquid discharging head includes a pressure chamber partitioning portion that includes a plurality of partitioning walls that partition a pressure chamber in which a pressure to discharge a liquid is applied to the liquid, a diaphragm that includes a wall surface that faces the pressure chamber. The pressure chamber is located between the partitioning walls in a second direction. The wall surface of the diaphragm includes a first portion at a first position, and a second portion. A position of the second portion in the first direction is on an opposite side in the first direction with respect to a position of the first portion in the first direction.

Abstract: A liquid ejecting head includes a diaphragm, a first electrode, a piezoelectric layer, and a second electrode in this order in a first direction, and ejects liquid. The second electrode includes a first portion that is next to the piezoelectric layer in the first direction and is electrically conductive. A length in the first direction is defined as a thickness. One position in a second direction intersecting with the first direction is defined as a first position. Another one position is defined as a second position that is closer to an end of the second electrode in the second direction than the first position is. Given the definition, the thickness of the first portion at the second position is less than the thickness of the first portion at the first position.

Abstract: Provided is a liquid discharging head including: a nozzle discharging a liquid; a chamber plate having a plurality of pressure chambers, drive elements provided in correspondence with each pressure chamber, and a plurality of lead electrodes for supplying electric signals to the drive elements; and a circuit substrate having terminals coupled to the lead electrodes. A first pressure chamber and a second pressure chamber communicate with the nozzle in common. A first segment electrode is formed so as to overlap the first pressure chamber and is not to overlap the second pressure chamber in plan view. A second segment electrode is formed so as to overlap the second pressure chamber and is not to overlap the first pressure chamber in plan view. The first segment electrode and the second segment electrode are coupled to the same lead electrode.