In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes a substrate and fluid actuators, the fluid actuators being disposed on the substrate. The fluidic die also includes a bond pad region defined on the substrate. The bond pad region includes a high aspect ratio power delivery bond pad with multiple bonding sites and a high aspect ratio power return bond pad with multiple bonding sites.

A liquid discharging apparatus may include a first head unit and a second head unit. The first head unit includes first and second parts. A position of the second part in a first direction is different from that of the first part, and a width is shorter than a width of the first part in a second direction. The second head unit includes a fourth part and a fifth part. A position of the fifth part in the first direction is different from that of the fourth part, and a width is shorter than a width of the fourth part in the second direction. The first head unit and the second head unit are disposed side by side in the second direction. At least a part of the second part and at least a part of the fifth part do not overlap with each other in the first direction.

An inkjet printing apparatus includes a printing unit having ejection parts, each configured to eject ink by using a piezoelectric element to be displaced in response to a change in electric potential. The inkjet printing apparatus also includes a circulation unit, a determination unit, and a control unit. The circulation unit executes ink circulation in a circulation path inclusive of the printing unit. The determination unit ejects the ink from each ejection part, detects residual vibration generated at an ejection part due to ink ejection, and determines an ejection state of ink ejection at the ejection part based on the detected residual vibration. The inkjet printing apparatus determines a printing state of ink ejection in the printing unit based on the ejection state. The control unit causes the determination unit not to make the ejection state determination in parallel with causing the circulation unit to execute the ink circulation.

A head chip, a liquid jet head, a liquid jet recording device, and a method of manufacturing a head chip each capable of ensuring the tolerance of the displacement between nozzle holes and communication holes while ensuring the bonding area between an actuator plate and an intermediate plate are provided. The head chip according to an aspect of the present disclosure includes an actuator plate, a nozzle plate disposed so as to be opposed to the actuator plate, and an intermediate plate disposed between the actuator plate and the nozzle plate. The communication holes each include a groove part having a lower-side opening part opening toward the nozzle hole, and a penetrating part having an upper-side opening part opening toward an ejection channel. A dimension in the X direction in the upper-side opening part is larger than a dimension in the X direction in the upper-side opening part, and a dimension in the X direction in the upper-side opening part is no larger than a dimension in the X direction of the channel opening part opening on a channel opening surface of the ejection channel.

A white ink jet ink composition according to the present disclosure includes hollow resin particles, resin particles, and water. The hollow resin particles have a glass transition temperature of 120° C. or more, the resin particles are composed of an acrylic resin or a urethane resin, and the content of the resin particles is 5% by mass or more relative to the total mass of the ink composition.

A substrate having a recessed portion, a diaphragm, and a piezoelectric actuator are provided, the diaphragm includes a first layer containing silicon as a constituent element, and a third layer disposed between the first layer and the piezoelectric actuator and containing zirconium as a constituent element, and a laminated side surface of the first layer and the third layer is covered with a moisture-resistant protective film containing at least one selected from the group made of oxide, nitride, metal, and diamond-like carbon.

A liquid ejecting head includes a flow passage, an energy producing element, and a nozzle. A direction in which a portion which is a part of the flow passage and with which the nozzle is in communication extends is defined as a first direction. A direction in which the liquid is ejected from the nozzle and which is orthogonal to the first direction is defined as a second direction. A direction which is orthogonal to both the first direction and the second direction is defined as a third direction. Given this definition, the nozzle includes a first portion and a second portion, the second portion being located closer to the flow passage along the second direction than the first portion is. The cross-sectional area size of the first portion when viewed in the second direction is smaller than the cross-sectional area size of the second portion when viewed in the second direction. The width, in the third direction, of an overlapping portion that is a part of the second portion and is included in a first region is greater than the width, in the third direction, of a non-overlapping portion that is a part of the second portion and is included in a second region. The first region is a region where the second portion overlaps with the first portion in the first direction. The second region is a region where the second portion does not overlap with the first portion in the first direction.

A liquid discharge head includes a nozzle plate, an individual liquid chamber, and an actuator. The nozzle plate has a nozzle on a liquid discharge face and a through hole communicating with the nozzle and penetrating the nozzle plate. The nozzle plate includes a substrate including a first silicon layer on a side of the liquid discharge face, a second silicon layer, a first silicon oxide film layer, and a second silicon oxide layer on a surface of the second silicon layer different from a surface of the second silicon layer in contact with the first silicon oxide film layer. A thickness of the first silicon layer is smaller than a thickness of the second silicon layer. A portion of the through hole penetrating the first silicon layer has a smaller diameter than a portion of the through hole penetrating the second silicon layer.

The first nozzle channel includes a first portion including an end of the first nozzle channel and a second portion including another end of the first nozzle channel, and a width of the second portion in the second direction is larger than a width of the first portion in the second direction.

A liquid discharging head is provided with: individual channels; a first common channel; and a second common channel. The individual channels include: first individual channels which have first pressure chambers and which are aligned in a second direction to form a first individual channel array, and second individual channels which have second pressure chambers and which are aligned in the second direction to form a second individual channel array; the first individual channel array and the second individual channel array are arranged in a third direction. The first common channel communicates with both of the first individual channels and the second individual channels; and the first pressure chambers and the second pressure chambers do not overlap with the second common channel in a first direction, and do not overlap with each other in the second direction.