Abstract: A liquid discharging apparatus includes: liquid discharging modules which are arranged in a first direction along a predetermined plane; and a wiring member commonly joined to the liquid discharging modules. The wiring member includes: first parts joined to the liquid discharging modules, respectively, in a state that the first parts are arranged side by side in the first direction along the predetermined plane; second parts; and a sixth part. The second parts include: third parts extending from the first parts, respectively, in a second direction orthogonal to the first direction and along the predetermined plane, fourth parts extending in a third direction away from the predetermined plane, and fifth parts connected to the third parts and the fourth parts, respectively. Width in the first direction of each of the second parts is smaller than width in the first direction of the sixth part.

Abstract: A liquid jetting apparatus includes: first pressure chambers aligned in a first direction; second pressure chambers aligned in the first direction and arranged at a distance from the first pressure chambers in a second direction orthogonal to the first direction; a first common channel extending in the first direction and communicating with the first pressure chambers; a second common channel extending in the first direction and communicating with the second pressure chambers; a third common channel extending in the first direction and communicating with the first and second pressure chambers; a substrate having a surface formed with the first and second pressure chambers and a space constituting at least part of the third common channel, vibration plates defining upper surfaces of the first and second pressure chambers, piezoelectric elements overlapping with the vibration plates, and a damper film defining an upper surface of the space.

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: A piezoelectric actuator a common electrode, an individual electrode, a first conductive pattern, a second conductive pattern, and a third conductive pattern. The first conductive pattern electrically connects to the common electrode. The second conductive pattern does not electrically connect to either the common electrode or the individual electrode. The third conductive pattern electrically connects to the individual electrode. The first conductive pattern and the third conductive pattern are opposite to each other relative to the second conductive pattern.

Abstract: An electrode connecting method includes: producing (i) a first circuit board including first electrodes spaced at a first distance and (ii) a second circuit board having a thermal expansion rate less than that of the first circuit board and including second electrodes spaced at a second distance, such that a difference in dimension between the first distance and the second distance falls within a particular permissible range; dehydrating the first circuit board so as to reduce the first distance; causing the first electrodes and the second electrodes to be respectively opposed to each other, with a thermosetting adhesive interposed between the first circuit board and the second circuit board; heating the thermosetting adhesive and at least the first circuit board of the first circuit board and the second circuit board; and bringing the first circuit board and the second circuit board into pressing contact with each other.

Abstract: There is provided a liquid discharge head including: a channel substrate including a pressure chamber; a support substrate having a through hole; a piezoelectric element disposed between the channel substrate and the support substrate in a thickness direction of the channel substrate; a drive section disposed on a surface of the support substrate on a side opposite to the piezoelectric element; a trace passing through the through hole of the support substrate, extending on the support substrate toward the drive section, and connected to the piezoelectric element and the drive section; and a reservoir member including a channel communicating with the pressure chamber, and joined to the surface of the support substrate with adhesive. A protrusion or a recess is provided on the surface of the support substrate on the side opposite to the piezoelectric element at a position between the trace and the channel.

Abstract: A liquid ejection head includes: nozzles; a channel member including a plurality of pressure chambers each in communication with a corresponding one of the nozzles; and a plurality of piezoelectric elements corresponding to the pressure chambers. Each piezoelectric element includes: a vibrating film covering the corresponding pressure chamber; a piezoelectric film positioned opposite to the pressure chamber with respect to the vibrating film; a first electrode interposed between the vibrating film and the piezoelectric film; and a second electrode having compressive stress and positioned opposite to the vibrating film with respect to the piezoelectric film. The piezoelectric film has a ratio of (001) orientation to (100) orientation that is equal to or greater than 50%. The vibrating film and the piezoelectric film are deflected convexly toward the corresponding pressure chamber while no potential difference is produced between the first electrode and the second electrode.

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 piezoelectric actuator, including: a vibration plate; a first piezoelectric body; a second piezoelectric body; a first electrode disposed on a first surface of the first piezoelectric body; a second electrode disposed on a second surface of the second piezoelectric body; an intermediate electrode disposed on an intermediate surface of the first piezoelectric body and overlapping with the first and second electrodes; an intermediate trace connected to the intermediate electrode on the intermediate surface and drawn out to one side in a first direction beyond the first piezoelectric body and the second piezoelectric body; a first trace overlapping with the intermediate trace in the thickness direction and being conducted with the intermediate trace; and a second trace overlapping with the intermediate trace in the thickness direction and being conducted with the intermediate trace.

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 discharging apparatus includes: liquid discharging modules which are arranged in a first direction along a predetermined plane; and a wiring member commonly joined to the liquid discharging modules. The wiring member includes: first parts joined to the liquid discharging modules, respectively, in a state that the first parts are arranged side by side in the first direction along the predetermined plane; second parts; and a sixth part. The second parts include: third parts extending from the first parts, respectively, in a second direction orthogonal to the first direction and along the predetermined plane, fourth parts extending in a third direction away from the predetermined plane, and fifth parts connected to the third parts and the fourth parts, respectively. Width in the first direction of each of the second parts is smaller than width in the first direction of the sixth part.

Abstract: A liquid discharge head includes: a first channel member including a liquid channel. The liquid channel includes: pressure chambers connected respectively to nozzles and arranged in a first direction; throttle channels connected to the pressure chambers and extending from connection portions with the pressure chambers toward a first side in a second direction orthogonal to the first direction; and coupling channels arranged in the first direction, each of the coupling channels being connected to two or more of the throttle channels that are adjacent to each other in the first direction, extending in a third direction orthogonal to the first direction and the second direction, having openings in a surface in the third direction of the first channel member.

Abstract: A liquid discharging head includes a channel member having a nozzle surface formed with first nozzles, second nozzles, third nozzles and fourth nozzles. The channel member is formed with: a first distributing channel communicating with a first storage chamber and extending in a first direction, a second distributing channel communicating with a second storage chamber, extending in the first direction, and arranged side by side to the first distributing channel in a second direction, a first common channel communicating with the first nozzles, a second common channel communicating with the second nozzles, a third common channel communicating with the third nozzles, and a fourth common channel communicating with the fourth nozzles. The first to fourth common channels each extend in a third direction crossing the first and second directions, and partially overlaps with the first and second distributing channels in a fourth direction orthogonal to the nozzle surface.

Abstract: A liquid ejection head includes: nozzles; a channel member including a plurality of pressure chambers each in communication with a corresponding one of the nozzles; and a plurality of piezoelectric elements corresponding to the pressure chambers. Each piezoelectric element includes: a vibrating film covering the corresponding pressure chamber; a piezoelectric film positioned opposite to the pressure chamber with respect to the vibrating film; a first electrode interposed between the vibrating film and the piezoelectric film; and a second electrode having compressive stress and positioned opposite to the vibrating film with respect to the piezoelectric film. The piezoelectric film has a ratio of (001) orientation to (100) orientation that is equal to or greater than 50%. The vibrating film and the piezoelectric film are deflected convexly toward the corresponding pressure chamber while no potential difference is produced between the first electrode and the second electrode.

Abstract: A liquid ejecting head includes: a substrate; a first electrode; a piezoelectric layer covering the first electrode; a second electrode positioned on the piezoelectric layer; a plurality of pressure chambers arrayed in a first direction; and a rigid layer. Each pressure chamber has one end portion and another end portion in a second direction. The rigid layer has an edge providing a plurality of convex parts and a plurality of concave parts. Each convex part and each concave part are alternately arrayed with each other in the first direction. Each convex part is positioned outside each pressure chamber and protrudes in the second direction toward the another end portion. Each concave part is positioned at each pressure chamber and is concaved in the second direction away from the another end 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 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 includes: first pressure chambers aligned in a first direction; second pressure chambers aligned in the first direction and arranged at a distance from the first pressure chambers in a second direction orthogonal to the first direction; a first common channel extending in the first direction and communicating with the first pressure chambers; a second common channel extending in the first direction and communicating with the second pressure chambers; a third common channel extending in the first direction and communicating with the first and second pressure chambers; a substrate having a surface formed with the first and second pressure chambers and a space constituting at least part of the third common channel, vibration plates defining upper surfaces of the first and second pressure chambers, piezoelectric elements overlapping with the vibration plates, and a damper film defining an upper surface of the space.

Abstract: There is provided a method of manufacturing a liquid discharge head, including: forming a stacked body having a structure and a protective member stacked on the structure, providing a first mask on an upper surface of the protective member to cover a through hole; forming a protective film by an atomic layer deposition on a surface defining a liquid flow channel of the stacked body provided with the first mask; and removing the first mask after forming the protective film.

Abstract: A liquid ejection head manufacturing method comprising a step of forming a laminate, a step of connecting and a step of forming a protection film. The laminate includes electrodes and flow paths of liquid. The step of connecting is connecting terminals of a wiring substrate to terminals of the electrodes. The protection film is formed using atomic layer deposition, on a surface of the laminate defining the flow paths after connecting the terminals.