Abstract: A liquid ejection apparatus, including: first piezoelectric elements arranged on an element-disposed surface in a first direction; a protective cover covering the first piezoelectric elements and including a top wall portion and two side wall portions connected thereto; first wires drawn respectively from the first piezoelectric elements to an outside of the protective cover in a second direction parallel to the element-disposed surface and orthogonal to the first direction and extending on an outer surface of the top wall portion via an outer surface of a corresponding side wall portion; first terminals disposed on the outer surface of the top wall portion and connected respectively to the first wires; and a driver electrically connected to the first terminals, wherein a distance in the first direction between any adjacent two of the first wires on an outer surface of the protective cover is larger than that on the element-disposed surface.

Abstract: There is provided a method for manufacturing a liquid discharge apparatus including: forming a photoresist film made of a photoresist on a silicon substrate; exposing the photoresist film; forming a nozzle in the photoresist film by exposing the photoresist film and then developing the photoresist film; forming a channel hole in communication with the nozzle by carrying out an etching process from a surface of the substrate on the opposite side from the photoresist film after forming the nozzle; and joining a channel member to the surface of the substrate on the opposite side from the photoresist film, the channel member including a pressure chamber in communication with the channel hole and a piezoelectric element formed as a film to correspond to the pressure chamber.

Abstract: An inkjet printer comprising a plurality of nozzles, a plurality of pressure chambers, a plurality of diaphragms, a plurality of piezoelectric elements, and a controller. Each of the plurality of diaphragms is deflected between a first state and a second state. The controller is configured to control voltage application to each of the plurality of piezoelectric elements. When a diaphragm is in the first state, the controller applies a first voltage so that the diaphragm is substantially flat; and when the diaphragm is in the second state, the controller applies a second voltage. The controller is configured to control the voltage such that a pressure chamber ejects an ink droplet from the corresponding nozzle in response to the deflection of the diaphragm reverting from the second state to the first state.

Abstract: A liquid jetting apparatus comprises a flow passage member which has a pressure chamber communicated with a nozzle and a liquid supply port communicated with the pressure chamber; a piezoelectric element with which the flow passage member is provided so that the piezoelectric element is overlapped with the pressure chamber; a protective member which is arranged on the flow passage member so that the piezoelectric element is covered therewith; and a supply member which is formed with a supply flow passage communicated with the liquid supply port of the flow passage member and which is adhered to extend over the flow passage member and the protective member; wherein a layer of a first adhesive to adhere the protective member and the supply member is thicker than a layer of a second adhesive to adhere the flow passage member and the supply member.

Abstract: An actuator device includes: an actuator including a first element contact; and a wire member including (a) a first contact connected to the first element contact and (b) a first wire configured to conduct with the first contact. A first wide portion is formed at a distal end portion of the first wire at an edge portion of the wire member. The first wide portion is disposed beyond the first element contact in a wire direction of the first wire. The first contact is disposed at a basal end portion of the first wire. The basal end portion is located further from the edge portion of the wire member than the first wide portion. The first contact is connected to the first element contact.

Abstract: An actuator device includes: an actuator including piezoelectric elements arranged in a first direction and first contacts arranged in the first direction; a protector including a first wall opposed to the piezoelectric elements and a second wall coupled to the first wall and joined to a region of the actuator at which the first contacts are disposed; first connection terminals disposed on the first; and first through electrodes formed in the second wall to bring the first contacts and the first connection terminals into conduction with each other. A distance between two of the first through electrodes which respectively correspond to two of the piezoelectric elements which are adjacent to each other in the first direction is greater than a distance in the first direction between the two of the piezoelectric elements which are adjacent to each other in the first direction.

Abstract: An actuator device includes: an actuator including first contacts arranged in a first direction; and a wire member including second contacts and joined to the actuator. The second contacts are arranged in the first direction and respectively connected to the first contacts. Each of particular contacts as the first contacts or the second contacts has a protruding and recessed portion including: at least two protrusions; and a recess between the at least two protrusions. The particular contacts include: at least one central-region contact disposed on a central region in the first direction; and at least one end-region contact disposed nearer to an end region than to the central region in the first direction. The protruding and recessed portion of each of the at least one central-region contact is different in shape from the protruding and recessed portion of each of the at least one end-region contact.

Abstract: An actuator device includes: an actuator including a first contact; and a wire member including a second contact connected to the first contact with a conductive adhesive including a conductive particle. One of the first contact and the second contact is a particular contact. The other of the first contact and the second contact is a specific contact. At least two protrusions and at least one recess are formed on and in the particular contact. The at least two protrusions are arranged in a first direction. The at least one recess is interposed between the at least two protrusions. The particular contact is joined to the specific contact with the conductive adhesive provided in the at least one recess, in a state in which each of the at least two protrusions is in contact with the specific contact.

Abstract: There is provided a liquid jet apparatus including a channel substrate having a plurality of pressure chambers and a film covering the plurality of pressure chambers, a piezoelectric layer, a plurality of individual electrodes, a common electrode, and a trace extending from one of the plurality of individual electrodes to pass through between two adjacent individual electrodes of the plurality of individual electrodes. An opening of the piezoelectric layer is provided between the two adjacent individual electrodes, and a metallic film is formed to cover the trace in such an area of the trace as to overlap with the opening positioned between the two adjacent individual electrodes.

Abstract: There is provided a liquid discharging apparatus including: a substrate formed with a first pressure chamber and two second pressure chambers; a vibration film; a first piezoelectric element; two second piezoelectric elements; a first wire connected to the first piezoelectric element; two second wires connected to the two second piezoelectric elements, respectively; and three contact sections to which the first wire and the two second wires are connected, respectively. The first wire passes between the two second piezoelectric elements and extends toward one of the three contact sections corresponding thereto; and length in the first direction of second active portions in second piezoelectric portions of the two second piezoelectric elements, is shorter than that of a first active portion in a first piezoelectric portion of the first piezoelectric element; and length in the second direction of the second active portion is longer than that of the first active portion.

Abstract: There is provided a method for manufacturing a liquid discharge apparatus including: forming a photoresist film made of a photoresist on a silicon substrate; exposing the photoresist film; forming a nozzle in the photoresist film by exposing the photoresist film and then developing the photoresist film; forming a channel hole in communication with the nozzle by carrying out an etching process from a surface of the substrate on the opposite side from the photoresist film after forming the nozzle; and joining a channel member to the surface of the substrate on the opposite side from the photoresist film, the channel member including a pressure chamber in communication with the channel hole and a piezoelectric element formed as a film to correspond to the pressure chamber.

Abstract: A liquid jetting apparatus comprises a flow passage member which has a pressure chamber communicated with a nozzle and a liquid supply port communicated with the pressure chamber; a piezoelectric element with which the flow passage member is provided so that the piezoelectric element is overlapped with the pressure chamber; a protective member which is arranged on the flow passage member so that the piezoelectric element is covered therewith; and a supply member which is formed with a supply flow passage communicated with the liquid supply port of the flow passage member and which is adhered to extend over the flow passage member and the protective member; wherein a layer of a first adhesive to adhere the protective member and the supply member is thicker than a layer of a second adhesive to adhere the flow passage member and the supply member.

Abstract: A liquid ejection apparatus, including: first piezoelectric elements arranged on an element-disposed surface in a first direction; a protective cover covering the first piezoelectric elements and including a top wall portion and two side wall portions connected thereto; first wires drawn respectively from the first piezoelectric elements to an outside of the protective cover in a second direction parallel to the element-disposed surface and orthogonal to the first direction and extending on an outer surface of the top wall portion via an outer surface of a corresponding side wall portion; first terminals disposed on the outer surface of the top wall portion and connected respectively to the first wires; and a driver electrically connected to the first terminals, wherein a distance in the first direction between any adjacent two of the first wires on an outer surface of the protective cover is larger than that on the element-disposed surface.

Abstract: A liquid jetting apparatus comprises a flow passage member which has a pressure chamber communicated with a nozzle and a liquid supply port communicated with the pressure chamber; a piezoelectric element with which the flow passage member is provided so that the piezoelectric element is overlapped with the pressure chamber; a protective member which is arranged on the flow passage member so that the piezoelectric element is covered therewith; and a supply member which is formed with a supply flow passage communicated with the liquid supply port of the flow passage member and which is adhered to extend over the flow passage member and the protective member; wherein a layer of a first adhesive to adhere the protective member and the supply member is thicker than a layer of a second adhesive to adhere the flow passage member and the supply member.

Abstract: There is provided a liquid discharging apparatus including: a substrate formed with a first pressure chamber and two second pressure chambers; a vibration film; a first piezoelectric element; two second piezoelectric elements; a first wire connected to the first piezoelectric element; two second wires connected to the two second piezoelectric elements, respectively; and three contact sections to which the first wire and the two second wires are connected, respectively. The first wire passes between the two second piezoelectric elements and extends toward one of the three contact sections corresponding thereto; and length in the first direction of second active portions in second piezoelectric portions of the two second piezoelectric elements, is shorter than that of a first active portion in a first piezoelectric portion of the first piezoelectric element; and length in the second direction of the second active portion is longer than that of the first active portion.

Abstract: There is provided a liquid jet apparatus including a channel substrate having a plurality of pressure chambers and a film covering the plurality of pressure chambers, a piezoelectric layer, a plurality of individual electrodes, a common electrode, and a trace extending from one of the plurality of individual electrodes to pass through between two adjacent individual electrodes of the plurality of individual electrodes. An opening of the piezoelectric layer is provided between the two adjacent individual electrodes, and a metallic film is formed to cover the trace in such an area of the trace as to overlap with the opening positioned between the two adjacent individual electrodes.

Abstract: A method for manufacturing a liquid jetting apparatus includes: a wire formation step of forming a wire so that a part of the wire covers a piezoelectric film; and an electrode formation step of forming a second electrode, after the wire formation step, on a surface of the piezoelectric film on a side far from a vibration film so as to be in electrical conduction with the wire. The liquid jetting apparatus includes: a flow passage formation portion; and a piezoelectric actuator having the vibration film provided on the flow passage formation portion, the piezoelectric film arranged on the vibration film, a first electrode arranged on a surface of the piezoelectric film on a side near to the vibration film, the second electrode arranged on the surface of the piezoelectric film on the side far from the vibration film, and the wire connected to the second electrode.

Abstract: A method for manufacturing a liquid jetting apparatus includes: a wire formation step of forming a wire so that a part of the wire covers a piezoelectric film; and an electrode formation step of forming a second electrode, after the wire formation step, on a surface of the piezoelectric film on a side far from a vibration film so as to be in electrical conduction with the wire. The liquid jetting apparatus includes: a flow passage formation portion; and a piezoelectric actuator having the vibration film provided on the flow passage formation portion, the piezoelectric film arranged on the vibration film, a first electrode arranged on a surface of the piezoelectric film on a side near to the vibration film, the second electrode arranged on the surface of the piezoelectric film on the side far from the vibration film, and the wire connected to the second electrode.

Abstract: There is provided a piezoelectric actuator including: a plurality of piezoelectric elements forming first and second piezoelectric element rows, and including first, second electrodes and piezoelectric portion; an electrode conductive portion; a contact section; a plurality of drive wires; and conductive wires. A part of the drive wires corresponding to the piezoelectric elements of the second piezoelectric element row are extended toward the contact section while passing between two adjacent piezoelectric elements of the first piezoelectric element row which are adjacent in the first direction. The conductive wires are arranged between two adjacent piezoelectric elements of the second piezoelectric element row, each of the conductive wires is conducted, at two locations thereof apart in the second direction, with the electrode conductive portion.

Abstract: There is provided a liquid discharging apparatus including: a substrate formed with a first pressure chamber and two second pressure chambers; a vibration film; a first piezoelectric element; two second piezoelectric elements; a first wire connected to the first piezoelectric element; two second wires connected to the two second piezoelectric elements, respectively; and three contact sections to which the first wire and the two second wires are connected, respectively. The first wire passes between the two second piezoelectric elements and extends toward one of the three contact sections corresponding thereto; and length in the first direction of second active portions in second piezoelectric portions of the two second piezoelectric elements, is shorter than that of a first active portion in a first piezoelectric portion of the first piezoelectric element; and length in the second direction of the second active portion is longer than that of the first active portion.