Abstract: The inkjet recording head comprises: a plurality of ink chambers aligned, each of the plurality of ink chambers having a nozzle; and a piezoelectric element arranged on an outer side of the plurality of ink chambers, the piezoelectric element using displacement in d31 direction, piezoelectric strain absorbing holes being formed through the piezoelectric element in regions of outer perimeters of active sections of the piezoelectric element, wherein when voltage is applied to one of the active sections of the piezoelectric element, corresponding one of the plurality of ink chambers is compressed by the piezoelectric element, and ink filled in the one of the plurality of ink chambers is discharged through the nozzle toward a recording medium.

Abstract: The liquid discharge head has a three-dimensional structure which defines a space including a pressure chamber filled with liquid and a flow channel for supplying the liquid to the pressure chamber, the three-dimensional structure being formed by depositing a composition material on a substrate according to a deposition method, and a drive element which causes discharge of the liquid from the pressure chamber through a nozzle.

Abstract: A head assembly includes a suspension having a gimbal, a flexible printed wiring sheet having a plurality of conductor patterns and adhered to the suspension, first and second piezoelectric actuators mounted on the gimbal, and a head slider mounted on the first and second piezoelectric actuators. The first and second piezoelectric actuators are adhered to the gimbal at end portion adhesion portions symmetrical with respect to the center of pivotal motion thereof and are adhered to the head slider at end portion adhesion portions on the opposite side disposed symmetrically with respect to the center of pivotal motion similarly. Consequently, when a voltage is applied to the first and second piezoelectric actuators through the flexible printed wiring sheet, a couple of forces can be generated which vary the posture of the head slider only in one direction around the center of pivotal motion.

Abstract: The method of manufacturing a piezoelectric actuator includes the steps of: carrying out a first heat treatment of a diaphragm of stainless steel containing iron, chromium and aluminum, in a gas containing oxygen, so as to form an aluminum oxide film on a first surface of the diaphragm and form a chromium oxide film between the aluminum oxide film and the first surface of the diaphragm; forming a lower electrode on the aluminum oxide film; forming a piezoelectric body on a surface of the lower electrode reverse to a surface of the lower electrode on which the chromium oxide film and the aluminum oxide film are formed; forming an upper electrode on a surface of the piezoelectric body reverse to a surface of the piezoelectric body on which the lower electrode is formed; and calcining the piezoelectric body by carrying out a second heat treatment of the diaphragm with which the piezoelectric body is provided.

Abstract: An ink-jet recording head having no piezoelectric element in a part where no piezoelectric element is required and including an individual electrode lead-out part having such a cross section that allows smooth power supply is provided. The ink-jet recording head includes an individual electrode having an individual electrode main body formed at a position corresponding to an ink chamber and an individual electrode lead-out part for supplying power, a piezoelectric element formed to contact the individual electrode, and a diaphragm formed to contact the piezoelectric element. The individual electrode lead-out part is connected to the individual electrode main body from a position offset from a face including an electrode face of the individual electrode main body, and the piezoelectric element is formed into a shape corresponding to the individual electrode main body.

Abstract: A method of manufacturing an ink-jet recording head includes an individual electrode having an individual electrode main body formed at a position corresponding to an ink chamber and an individual electrode lead-out part for supplying power, a piezoelectric element formed to contact the individual electrode, and a diaphragm formed to contact the piezoelectric element. The individual electrode lead-out part is connected to the individual electrode main body from a position offset from a face including an electrode face of the individual electrode main body, and the piezoelectric element is formed into a shape corresponding to the individual electrode main body.

Abstract: The liquid ejection head comprises: a pressure chamber which is connected to a nozzle; a diaphragm which constitutes one face of the pressure chamber; and a piezoelectric element which deforms the diaphragm for ejecting liquid inside the pressure chamber through the nozzle, wherein the liquid is ejected by driving the piezoelectric element in a temperature region in which a tendency of increase or decrease in viscosity of the liquid with respect to temperature of the liquid and a tendency of increase or decrease in a piezoelectric d constant of the piezoelectric element with respect to temperature of the piezoelectric element have a prescribed relationship.

Abstract: The liquid ejection head comprises: a pressure chamber which is connected to an ejection port ejecting liquid, the liquid being supplied to the pressure chamber from a supply flow channel; and a piezoelectric element which forms a wall surface of the pressure chamber facing to the ejection port, wherein, during liquid ejection, the liquid inside the pressure chamber is pressurized by means of displacement of the piezoelectric element in d33 direction, and a gap formed between a partition of the pressure chamber and the piezoelectric element is made narrower than during refilling, in such a manner that flow resistance of the liquid from the pressure chamber toward the supply flow channel becomes greater than during refilling.

Abstract: The method manufactures a liquid ejection head in which piezoelectric bodies are formed on a diaphragm which constitutes walls of a plurality of pressure chambers. The method comprises the steps of: filling piezoelectric material into a plurality of recess sections of a molding substrate formed with the plurality of recess sections so as to correspond to the pressure chambers; then performing a lamination step of arranging a first green sheet that is to form the diaphragm onto the molding substrate in such a manner that the first green sheet covers the recess sections filled with the piezoelectric material; then performing a first heating step of heating the piezoelectric material filled in the recess sections; and then separating the piezoelectric material from the molding substrate.

Abstract: The method manufactures a liquid ejection head comprising: a plurality of nozzles which eject liquid; a plurality of pressure chambers which are connected to the nozzles, respectively; a diaphragm which forms wall faces of the pressure chambers; and piezoelectric elements which are disposed on the diaphragm at positions corresponding to the pressure chambers and each are formed of at least a piezoelectric material and electrodes overlapping each other.

Abstract: The liquid ejection head ejects droplets of liquid from ejection ports by pressurizing the liquid filled in pressure chambers connected to the ejection ports.

Abstract: The method for manufacturing a liquid ejection head comprising a diaphragm which serves as portions of pressure chambers connected to nozzles through which liquid is ejected, and piezoelectric bodies which deform the diaphragm, the method comprises: an electrical wire forming step of removing at least a part of a silicon substrate, and forming electrical wires for supplying drive signals to drive the piezoelectric bodies, in sections where the silicon substrate has been removed; a piezoelectric body forming step of forming the piezoelectric bodies on sections where the silicon substrate has not been removed at least in the electrical wire forming step; and a diaphragm forming step of forming the diaphragm on a side of the piezoelectric bodies opposite to the silicon substrate.

Abstract: The liquid ejection head comprises: a nozzle which ejects a liquid; a pressure chamber which is connected to the nozzle; a common liquid chamber which supplies the liquid to the pressure chamber; a piezoelectric element which causes the pressure chamber to deform; and a liquid supply channel which connects between the common liquid chamber and the pressure chamber, wherein the liquid supply channel passes through an active section of the piezoelectric element.

Abstract: The liquid ejection head comprises: a nozzle plate which has a plurality of ejection apertures through which a liquid is ejected; a plurality of pressure chambers which are connected respectively to the ejection apertures; a plurality of liquid supply flow channels which supply the liquid respectively to the pressure chambers; a common liquid chamber which supplies the liquid to the liquid supply flow channels; a plurality of pressure generating devices which respectively deform the pressure chambers; and a plurality of electrical wires which supply drive signals to the pressure chamber generating devices, wherein the electrical wires are provided so as to pass through the common liquid chamber.

Abstract: The ejection head comprises: a wall member which forms a pressure chamber and has an ejection aperture through which droplets of a liquid are ejected onto an ejection receiving medium, the pressure chamber accommodating the liquid to be ejected from the ejection aperture; a diaphragm which causes a volume of the pressure chamber to change by performing bending deformation so as to cause the liquid accommodated in the pressure chamber to be ejected from the ejection aperture, the diaphragm forming one face of the pressure chamber; a piezoelectric element which causes the diaphragm to perform bending deformation in accordance with a drive signal, the piezoelectric element being disposed on the diaphragm; and a bonding member which bonds the diaphragm with the wall member, wherein the bonding member comprises a low-rigidity member; and the piezoelectric element has a greater length than an internal effective length of the pressure chamber.

Abstract: The laminated piezoelectric element comprises a plurality of layers including first electrodes, piezoelectric material bodies, and second electrodes, wherein: the layers are laminated in order of the first electrode, the piezoelectric material body, the second electrode, and the piezoelectric material body; a plurality of active parts of the laminated piezoelectric element, where the piezoelectric material bodies are capable of actively expanding and contracting when a voltage is applied to the first electrode and the second electrode that are mutually opposing across the piezoelectric material body, are two-dimensionally arranged in a row direction and a column direction; and the first electrodes are common to the plurality of active parts in the row direction and the second electrodes are common to the plurality of active parts in the column direction.

Abstract: The discharging head for discharging liquid onto a discharge receiving medium comprises a vibration plate forming at least a portion of a pressure chamber storing liquid to be discharged; and a piezoelectric element, joined to said vibration plate, for generating a pressure forming a discharge force for discharging liquid inside said pressure chamber; wherein a recess is formed in the approximate center of the region of said vibration plate where said piezoelectric element is installed.

Abstract: The method for manufacturing a discharge head having a piezoelectric body which applies a discharge pressure to a droplet of liquid discharged onto a discharge receiving medium, the method comprises: a piezoelectric film forming step of forming a film of a piezoelectric body onto at least one surface of a base substrate, by means of a thin film forming technique; a heat treatment step of sintering the piezoelectric film by heat treatment, at least one of during formation of the piezoelectric film in the piezoelectric film forming step, and after formation of the piezoelectric film; a diaphragm forming step of forming a diaphragm by at least one of bonding and film deposition onto a surface of the piezoelectric body on an opposite side to the base substrate, after the piezoelectric body has been formed by the piezoelectric film forming step and the heat treatment step; a pressure chamber forming step of forming pressure chamber walls on a surface of the diaphragm on an opposite side to the piezoelectric body;

Abstract: The liquid discharge head comprises: a three-dimensional structure which defines a space including a pressure chamber filled with liquid and a flow channel for supplying the liquid to the pressure chamber, at least a part of the three-dimensional structure being formed by depositing layers composed of at least two different composition materials on a substrate according to a deposition method; and a drive element which causes discharge of the liquid from the pressure chamber through a nozzle.

Abstract: The liquid discharge head comprises: a three-dimensional structure which defines a space including a pressure chamber filled with liquid and a flow channel for supplying the liquid to the pressure chamber, the three-dimensional structure being formed by depositing a composition material on a substrate according to a deposition method; and a drive element which causes discharge of the liquid from the pressure chamber through a nozzle.