Abstract: A piezoelectric element includes a first electrode provided at a base body, a piezoelectric layer provided at the first electrode and containing a composite oxide that contains potassium, sodium, and niobium and that has a perovskite structure, and a second electrode provided at the piezoelectric layer, wherein the first electrode is a platinum layer, the first electrode is preferentially oriented to (111), and the first electrode has an average crystal grain diameter of 200 nm or more.

Abstract: A piezoelectric device (an actuator unit) includes the following: a first substrate (a pressure chamber forming substrate, a diaphragm) having a piezoelectric layer and a first wiring conductor (a top electrode layer) that is at least partially stacked on the piezoelectric layer; and a second substrate (a sealing substrate) having a second wiring conductor (a bottom wiring conductor) that faces and is separated from the first wiring conductor (a top electrode layer) and to which an electrical signal different from an electrical signal that is applied to the first wiring conductor (a top electrode layer) is applied. At least one of the first wiring conductor (a top electrode layer) and the second wiring conductor (a bottom wiring conductor) is at least partially covered with an electrically insulating protective layer.

Abstract: A liquid ejecting head includes: a flow channel forming substrate that forms an individual flow channel including a nozzle and a pressure chamber, a first common liquid chamber, and a second common liquid chamber; and a pressure generating element that causes a pressure change in a liquid in the pressure chamber, in which the first common liquid chamber is coupled to the second common liquid chamber via the individual flow channel, a compliance of the first common liquid chamber is larger than a compliance of the second common liquid chamber, and in the individual flow channel, a flow channel resistance between a first coupling portion with the first common liquid chamber and the pressure chamber is smaller than a flow channel resistance between a second coupling portion with the second common liquid chamber and the pressure chamber.

Abstract: A piezoelectric element includes a first electrode provided at a base body, a piezoelectric layer provided at the first electrode and containing a composite oxide that contains potassium, sodium, and niobium and that has a perovskite structure, and a second electrode provided at the piezoelectric layer, wherein the first electrode is a platinum layer, the first electrode is preferentially oriented to (111), and the first electrode has an average crystal grain diameter of 200 nm or more.

Abstract: A liquid in the vicinity of a nozzle is efficiently circulated. A liquid ejecting head includes: a nozzle plate provided with a first nozzle; a flow channel forming unit provided with a first pressure, a first communication channel through which the first nozzle and the first pressure chamber communicate with each other, and a circulating liquid chamber. The nozzle plate is provided with a first circulation channel through which the first communication channel and the circulating liquid chamber communicate with each other.

Abstract: In a liquid ejecting head, a reduction in mechanical strength due to a liquid chamber provided to circulate a liquid is limited. The liquid ejecting head includes: a nozzle plate provided with a nozzle; a flow channel forming unit provided with a pressure chamber to which a liquid is supplied, a communication channel through which the nozzle and the pressure chamber communicate with each other, and a circulating liquid chamber communicating with the communication channel; and a pressure generating unit that generates a pressure change in the pressure chamber. A height at a first location in the circulating liquid chamber is larger than a height at a second location on a side of the communication channel when viewed from the first location.

Abstract: A liquid container includes a liquid supply portion, a liquid container body, and a container-side electrical connection structure provided to have a contact portion that is configured to come into contact with an apparatus-side electrical connection structure provided in a liquid consuming apparatus. The container-side electrical connection structure includes a placement portion configured to place the contact portion to be located above the liquid container body in the direction of gravity in a process of connecting the liquid container with the liquid consuming apparatus.

Abstract: A liquid ejecting head including a vibration plate that forms a wall surface of a pressure chamber filled with a liquid; and a piezoelectric element that vibrates the vibration plate to eject the liquid in the pressure chamber from nozzles, in which the vibration plate includes a first layer formed of silicon oxide, a second layer formed of zirconium oxide on a side opposite to the pressure chamber when viewed from the first layer, a ratio of a film thickness of the second layer to a film thickness of the first layer is 0.16 or more, and the film thickness of the second layer is 300 nm or more.

Abstract: A liquid ejecting head includes: a flow channel forming substrate that forms an individual flow channel including a nozzle and a pressure chamber, a first common liquid chamber, and a second common liquid chamber; and a pressure generating element that causes a pressure change in a liquid in the pressure chamber, in which the first common liquid chamber is coupled to the second common liquid chamber via the individual flow channel, a compliance of the first common liquid chamber is larger than a compliance of the second common liquid chamber, and in the individual flow channel, a flow channel resistance between a first coupling portion with the first common liquid chamber and the pressure chamber is smaller than a flow channel resistance between a second coupling portion with the second common liquid chamber and the pressure chamber.

Abstract: Disclosed is a liquid ejecting head including a flow passage forming section in which a pressure chamber which communicates with a nozzle ejecting liquid and a circulation liquid chamber which communicates with the pressure chamber to circulate the liquid are formed, a driving element that generates pressure change in the pressure chamber, a circuit board for driving the driving element, and a connecting terminal that electrically connects the driving element with the circuit board, in which the connecting terminal overlaps the circulation liquid chamber in a plan view.

Abstract: A liquid container includes a liquid container body, a liquid supply port, an operation member, and a container-side electrical connection structure provided integrally with the operation member and configured to have a contact portion that is configured to come into contact with an apparatus-side electrical connection structure provided in a liquid consuming apparatus. The operation member has an opening having a receiving space to receive a user's hand.

Abstract: A liquid ejecting head including a vibration plate that forms a wall surface of a pressure chamber filled with a liquid; and a piezoelectric element that vibrates the vibration plate to eject the liquid in the pressure chamber from nozzles, in which the vibration plate includes a first layer formed of silicon oxide, a second layer formed of zirconium oxide on a side opposite to the pressure chamber when viewed from the first layer, a ratio of a film thickness of the second layer to a film thickness of the first layer is 0.16 or more, and the film thickness of the second layer is 300 nm or more.

Abstract: In a liquid ejecting head, a reduction in mechanical strength due to a liquid chamber provided to circulate a liquid is limited. The liquid ejecting head includes: a nozzle plate provided with a nozzle; a flow channel forming unit provided with a pressure chamber to which a liquid is supplied, a communication channel through which the nozzle and the pressure chamber communicate with each other, and a circulating liquid chamber communicating with the communication channel; and a pressure generating unit that generates a pressure change in the pressure chamber. A height at a first location in the circulating liquid chamber is larger than a height at a second location on a side of the communication channel when viewed from the first location.

Abstract: A liquid in the vicinity of a nozzle is efficiently circulated. A liquid ejecting head includes: a nozzle plate provided with a first nozzle; a flow channel forming unit provided with a first pressure, a first communication channel through which the first nozzle and the first pressure chamber communicate with each other, and a circulating liquid chamber. The nozzle plate is provided with a first circulation channel through which the first communication channel and the circulating liquid chamber communicate with each other.

Abstract: Disclosed is a liquid ejecting head including a flow passage forming section in which a pressure chamber which communicates with a nozzle ejecting liquid and a circulation liquid chamber which communicates with the pressure chamber to circulate the liquid are formed, a driving element that generates pressure change in the pressure chamber, a circuit board for driving the driving element, and a connecting terminal that electrically connects the driving element with the circuit board, in which the connecting terminal overlaps the circulation liquid chamber in a plan view.

Abstract: A liquid container includes a liquid supply portion, a liquid container body, and a container-side electrical connection structure provided to have a contact portion that is configured to come into contact with an apparatus-side electrical connection structure provided in a liquid consuming apparatus. The container-side electrical connection structure includes a placement portion configured to place the contact portion to be located above the liquid container body in the direction of gravity in a process of connecting the liquid container with the liquid consuming apparatus.

Abstract: A liquid container includes a liquid container body, a liquid supply port, an operation member, and a container-side electrical connection structure provided integrally with the operation member and configured to have a contact portion that is configured to come into contact with an apparatus-side electrical connection structure provided in a liquid consuming apparatus. The operation member has an opening having a receiving space to receive a user's hand.

Abstract: A piezoelectric device includes a substrate that includes a piezoelectric element formed by stacking a piezoelectric layer, a first electrode and a second electrode such that the piezoelectric layer is interposed between the first electrode and the second electrode; and a wiring substrate that includes a driving element providing a signal for driving the piezoelectric element to the substrate. The substrate has an inspection region where a piezoelectric element for inspection which is a portion of the piezoelectric element is disposed. The wiring substrate has an electrode inspection region including an electrode to be inspected that is electrically connected to the piezoelectric element for inspection and is disposed on a surface side opposite to the substrate, and a flexible substrate mounting region which is disposed on the surface side opposite to the substrate, and is connected to a flexible substrate.

Abstract: A liquid container comprises a liquid supply portion, a liquid container body, and a container-side electrical connection structure provided to have a contact portion that is configured to come into contact with an apparatus-side electrical connection structure provided in a liquid consuming apparatus. The container-side electrical connection structure includes a placement portion configured to place the contact portion to be located above the liquid container body in the direction of gravity in a process of connecting the liquid container with the liquid consuming apparatus.

Abstract: There is provided a liquid supply unit provided with a liquid container that is configured to supply a liquid to a liquid consuming apparatus. The liquid supply unit includes a unit housing located below the liquid consuming apparatus and configured to be detachably mounted to the liquid consuming apparatus; the liquid container configured to be placed inside of the unit housing and provided with a liquid supply portion that is arranged to flow out the liquid; and a liquid introduction portion configured to be connected with the liquid supply portion and to flow the liquid from the liquid supply portion to the liquid consuming apparatus, the liquid introduction portion.