A liquid discharging head includes a discharge port that discharges a liquid, a pressure chamber that communicates with the discharge port, and an energy generating element that is disposed in the pressure chamber. In the liquid discharging head, the discharge port is provided with a plurality of projections that project towards a central portion of the discharge port from an inner peripheral edge of the discharge port, and an interval between the projections at a location where the projections are closest to each other is 5 m or less.

A liquid accommodating body includes a liquid accommodating chamber that accommodates liquid, a pouring port through which the liquid is poured into the liquid accommodating chamber, a visual recognition portion through which a surface of liquid accommodated in the liquid accommodating chamber is visually recognized and which is provided on a side wall forming the liquid accommodating chamber, a partition wall that partitions the liquid accommodating chamber into a pouring port side liquid accommodating chamber into which the liquid is poured through the pouring port and a visual recognition portion side liquid accommodating chamber including the visual recognition portion in a direction intersecting a gravity direction, and a liquid communication portion which is provided between the partition wall and a bottom wall forming the liquid accommodating chamber and through which the pouring port side liquid accommodating chamber and the visual recognition portion side liquid accommodating chamber communicate with each other.

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.

An example fluidic micro electromechanical system may include a substrate and a first layer supported by the substrate. The first layer forms sides of a chamber, a passage through one of the sides and a chamber and a check valve leaf. The check valve leaf is pivotable about an axis nonparallel to the substrate to open and close the passage. The system may further include a second layer over the chamber, an opening into the chamber and a resistor supported within the chamber.

In a liquid ejection head, an ejection unit of a channel member includes an ejection hole, a pressurizing chamber connected to the ejection hole, a first channel and a second channel each connecting the pressurizing chamber and a first common channel, and a third channel connecting the pressurizing chamber and a second common channel. The first common channel, in the channel direction, includes a plurality of first portions, and a plurality of second portions each located between each two of the plurality of first portions and having smaller cross-sectional areas than those of the first portions in front and back of the same. In each of the plurality of ejection units, the first channel and the second channel are individually connected to two positions in the first common channel which sandwich at least one of the second portions between them.

A liquid discharging head includes a discharge port that discharges a liquid, a pressure chamber that communicates with the discharge port, and an energy generating element that is disposed in the pressure chamber. In the liquid discharging head, the discharge port is provided with a plurality of projections that project towards a central portion of the discharge port from an inner peripheral edge of the discharge port, and an interval between the projections at a location where the projections are closest to each other is 5 m or less.

According to one embodiment, a droplet dispensing apparatus includes a droplet ejection array having a plurality of nozzles from which droplets can be ejected into a well opening of a microplate plate on a baseplate, a sensor configured to detect a liquid amount in the microplate, and a controller configured to detect that a nozzle in the plurality of nozzles is not discharging during a droplet ejection process based on an initial liquid amount in the microplate as detected by the sensor and a final liquid amount in the microplate as detected by the sensor during a droplet ejection process in which a predetermined number of droplets are to be ejected from the plurality of nozzles into the microplate.

A liquid discharge head includes a channel member and a recording element substrate. The channel member includes a discharge port configured to discharge liquid and at least one channel configured to supply the liquid to the discharge port. The recording element substrate includes a supply path and an energy generating element. The supply path connects to the at least one channel with a connection and is configured to supply the liquid to the at least one channel. The energy generating element is configured to discharge the liquid from the discharge port. The channel member further includes, at positions of the channel member facing the connection, a plurality of spaces, the spaces being formed by covering part of recesses of the channel member with a covering portion, the spaces each including an opening communicating with the at least one channel.

An inkjet printing head 1 includes an actuator substrate, having an ink flow passage that includes a pressure chamber, a movable film formation layer, including a movable film, disposed on the pressure chamber and defining a top surface portion of the pressure chamber, a piezoelectric element 9, formed on the movable film, and a protective substrate 4, bonded to the actuator substrate so as to cover the piezoelectric element 9, and the protective substrate 4 has an ink supply passage 53 in communication with the ink flow passage, and on a surface of the protective substrate 4 at an opposite side from the actuator substrate, an alignment mark 81 is formed in each of a plurality of small regions set by dividing an entire region of the surface.

A fluid discharging apparatus includes an accommodation unit that accommodates a fluid, a discharge port that communicates with the accommodation unit, a moving object that moves in a first direction toward the discharge port and in a second direction away from the discharge port in the accommodation unit, and a control unit that controls driving of the moving object. The control unit performs discharging processing and moving processing. In the discharging processing, the discharge port is opened by moving the moving object from a closed position at which the discharge port is closed, in the second direction, and then the fluid is extruded and discharged from the discharge port by moving the moving object in the first direction. In the moving processing, the moving object is moved in the second direction during a period when the fluid is discharged from the discharge port in the discharging processing.