Abstract: There is provided a liquid discharge head including a first channel unit and a second channel unit. The first channel unit includes: a first joining surface; a tube disposed on an opposite surface opposite to the first joining surface; an outside portion; and a coupling portion. The second channel unit is joined to the first joining surface. An end of the outside portion and an end of the coupling portion in an orthogonal direction orthogonal to the first joining surface extend to an identical position in the orthogonal direction. The tube includes a circumferential portion that is exposed outside and extends in the orthogonal direction to the identical position to which the end of the outside portion and the end of the coupling portion extend.

Abstract: A liquid jetting apparatus includes: a liquid jetting head having: a plurality of kinds of individual channels, a jetting surface formed with a plurality of kinds of nozzles from which a plurality of kinds of liquids are jetted, respectively, a plurality of kinds of inflow channels, a plurality of kinds of outflow channels; valves provided at least on the plurality of kinds of inflow channels; a wiper configured to be movable relative to the liquid jetting head in a direction along the jetting surface; a first motor configured to move the liquid jetting head and the wiper relative to each other; and a controller. The controller executes a wiping by driving the first motor in a state that the valves are closed.

Abstract: A liquid ejection head includes a plurality of sets of a first row, a second row, and a flow path in communication with the first row and the second row. Each of the plurality of sets are provided for each respective one of a plurality of kinds of liquids different from one another. The first row includes a plurality of first pressure chambers. The second row includes a plurality of second pressure chambers. The second row is positioned beside the first row. The flow path is in communication with the plurality of first pressure chambers and the plurality of second pressure chambers. The flow path includes a plurality of first communication passages, a plurality of second communication passages, a plurality of third communication passages, a plurality of fourth communication passages, a first manifold, a second manifold, and a common manifold.

Abstract: A liquid jetting apparatus includes: liquid jetting heads which are arranged along a predetermined arrangement direction and each of which has a first nozzle to jet a first liquid and a second nozzle to jet a second liquid, a first tank in which the first liquid is stored, a second tank in which the second liquid is stored, first supply channels which connect the first tank and the liquid jetting heads, second supply channels which connect the second tank and the liquid jetting heads, first return channels which connect the liquid jetting heads and the first tank, and second return channels which connect the liquid jetting heads and the second tank. The first tank and the second tank are arranged to deviate from each other in the arrangement direction.

Abstract: There is provided a liquid discharge head including: a first plate formed with an individual channel which includes a pressure chamber; a second plate; a vibration plate; and a piezoelectric element. The second plate has a pair of communicating channels arranged to sandwich an accommodating space, which accommodates the piezoelectric element, therebetween. A spacing distance between mutually close parts in a pair of inner circumferential surfaces of the pair of communicating channels, respectively, is greater on a side of one ends in the stacking direction of the pair of communicating channels than on a side of the other ends in the stacking direction of the pair of communicating channels, the one ends being close to the individual channel in the stacking direction.

Abstract: Provided is a spray chamber including a sample introduction port portion into which a gas flow containing sample droplets that have been atomized by a nebulizer is introduced, a discharge port portion that discharges at least a part of the gas flow introduced into the sample introduction port portion to the outside, and a flow passage tube portion that has the sample introduction port portion on one end portion thereof and the discharge port portion on the other end portion thereof and serves as a flow passage for the introduced gas flow, wherein the flow passage tube portion includes a first tube portion having the discharge port portion on one end portion thereof and a second tube portion having the sample introduction port portion on one end portion thereof, the spray chamber includes a double tube portion.

Abstract: A liquid ejection head, including: a first head unit; a second head unit shifted with respect to the first head unit in both of a first direction in which nozzles of the head units are arranged and a second direction orthogonal to the first direction and disposed so as to overlap the first head unit in the second direction; and a first wiring member having flexibility and drawn from the second head unit in the second direction toward the first head unit, wherein the first wiring member includes a large-width portion on which a drive circuit is mounted and a small-width portion having a width in the first direction smaller than a width of the large-width portion in the first direction, and wherein the small-width portion passes through a space existing next to the first head unit in the first direction and extends in the second direction.

Abstract: A liquid discharging head includes: individual channels each including a nozzle; an inflow channel communicated with the individual channels; an outflow channel communicated with the individual channels; an inflow-side filter provided on the inflow channel and dividing the inflow channel into a lower inflow area and an upper inflow area; an outflow-side filter provided on the outflow channel and dividing the outflow channel into a lower outflow area and an upper outflow area; an inflow port which is provided on the upper inflow area and through which the liquid is supplied to the inflow channel from outside thereof; an outflow port which is provided on the upper outflow area and through which the liquid is discharged from the outflow channel to outside thereof; and a bypass channel connecting the upper inflow area and the upper outflow area.

Abstract: A liquid ejecting head includes: a plurality of liquid ejecting modules each including a plurality of head units and a first plate, a second plate, and a protrusion. The plurality of liquid ejecting modules is arrayed in a first direction. The first plate has a first surface to which the plurality of head units is fixed and a second surface opposite to the first surface. The first plate has a thickness in a second direction. The second plate is disposed at the second surface of the first plate so as to extend along the plurality of liquid ejecting modules. The protrusion protrudes from the second plate in a direction away from the first plate.

Abstract: An actuator device includes an actuator substrate having actuators, individual conductors electrically connected with the actuators respectively, and dummy conductors; and a bonding member bonded to a surface of the actuator substrate provided with the individual conductors and the dummy conductors. The individual conductors are aligned in an alignment direction to form a first row and a second row arranged in an orthogonal direction orthogonal to the alignment direction. In a first end portion of the actuator substrate on one side in the alignment direction, first individual conductors are aligned in the alignment direction without intervening second individual conductors therebetween. In a second end portion of the actuator substrate on the other side in the alignment direction, the second individual conductors are aligned in the alignment direction without intervening the first individual conductors therebetween.

Abstract: Provided is a method of analyzing metal contamination of a silicon wafer, the method including etching a surface layer region of the silicon wafer by bringing a surface of a silicon wafer to be analyzed into contact with etching gas that includes hydrogen fluoride gas and nitric acid gas; bringing an exposed surface of the silicon wafer, exposed by the etching, into contact with gas generated from a mixed acid including hydrochloric acid and nitric acid; heating the silicon wafer that has been brought into contact with the gas generated from the mixed acid; bringing the exposed surface, exposed by the etching, of the silicon wafer after the heating into contact with a recovery solution; and analyzing a metal component in the recovery solution that has been brought into contact with the exposed surface, exposed by the etching, of the silicon wafer.

Abstract: A liquid ejection head, including: a first head unit; a second head unit shifted with respect to the first head unit in both of a first direction in which nozzles of the head units are arranged and a second direction orthogonal to the first direction and disposed so as to overlap the first head unit in the second direction; and a first wiring member having flexibility and drawn from the second head unit in the second direction toward the first head unit, wherein the first wiring member includes a large-width portion on which a drive circuit is mounted and a small-width portion having a width in the first direction smaller than a width of the large-width portion in the first direction, and wherein the small-width portion passes through a space existing next to the first head unit in the first direction and extends in the second direction.

Abstract: There is provided a liquid discharge apparatus which includes a channel substrate having a nozzle, a pressure chamber which communicates with the nozzle, an actuator which covers the pressure chamber, and a contact point that is electrically connected to the actuator, and a circuit board which has wires that are to be electrically connected to contact points, and which is adhered to the channel substrate. The channel substrate includes an adhesive wall which is provided with contact points, and which has a surface to which an adhering portion of the circuit board to be adhered to the channel substrate, is adhered, and further includes a wall portion which is provided with a cavity on a side of the adhesive wall, opposite to the surface, and which demarcates the cavity on a side opposite to the surface, of the adhesive wall, and the adhering portion is facing the cavity and the wall portion.

Abstract: A liquid ejection head, including: nozzles; and a supply passage through which a liquid is supplied to the nozzles, wherein the supply passage includes (a) a first flow passage and (b) a second flow passage connected to the first flow passage and including two sections that extend in different directions from a connected position at which the first flow passage is connected to the second flow passage, the liquid being supplied to the second flow passage from the first flow passage, wherein the second flow passage has a liquid flow resistance larger in a first section than in a second section, and wherein a protrusion protruding toward the first flow passage is provided on an inner wall surface of the second flow passage facing the first flow passage, for permitting the liquid to more easily flow from the first flow passage into the first section than the second section.

Abstract: A filter unit includes: a liquid chamber forming member having a liquid inlet port, a liquid outlet port, and a liquid chamber communicating with the liquid inlet port and the liquid outlet port; and a filter disposed in the liquid chamber such that a surface direction of the filter lies along an up-down direction, the filter extending to an upper end of the liquid chamber to divide the liquid chamber into an upstream chamber communicating with the liquid inlet port and a downstream chamber communicating with the liquid outlet port. A discharge port joined to the liquid outlet port is disposed in an upper end portion of the downstream chamber at a central portion in a width direction orthogonal to the up-down direction, and the liquid chamber forming member has two first side wall surfaces sandwiching the discharge port in the width direction.

Abstract: A liquid jetting apparatus jetting a liquid onto a recording medium conveyed in a first direction includes head units arranged in a second direction orthogonal to the first direction. One head unit includes nozzle chips; one nozzle chip has a nozzle arrangement area wherein nozzles are aligned in a third direction crossing the first and second directions. The nozzle chip is arranged to be shifted relative to another nozzle chip in a direction crossing the first and second directions and different from the third direction. The head unit has a first overlapping portion wherein nozzle arrangement areas of first and second nozzle chips included in the nozzle chips partially overlap with each other in the first direction. The liquid jetting apparatus has a second overlapping portion wherein nozzle arrangement areas of third and fourth nozzle chips included in the head units partially overlap with each other in the first direction.

Abstract: A liquid jetting head includes a flow channel substrate formed with pressure chambers, an actuator covering the pressure chambers, and a temperature sensor. A dummy pressure chamber is formed in a surface, of the flow channel substrate, in which the pressure chambers are open. The actuator includes: a vibration plate which covers the pressure chambers and the dummy pressure chamber and which has a first surface facing the pressure chambers and a second surface opposite to the first surface, and a piezoelectric body arranged on the second surface of the vibration plate to face the pressure chambers. The temperature sensor is arranged on the second surface of the vibration plate at a position facing the dummy pressure chamber.

Abstract: A liquid jetting apparatus jetting a liquid onto a recording medium conveyed in a first direction includes head units arranged in a second direction orthogonal to the first direction. One head unit includes nozzle chips; one nozzle chip has a nozzle arrangement area wherein nozzles are aligned in a third direction crossing the first and second directions. The nozzle chip is arranged to be shifted relative to another nozzle chip in a direction crossing the first and second directions and different from the third direction. The head unit has a first overlapping portion wherein nozzle arrangement areas of first and second nozzle chips included in the nozzle chips partially overlap with each other in the first direction. The liquid jetting apparatus has a second overlapping portion wherein nozzle arrangement areas of third and fourth nozzle chips included in the head units partially overlap with each other in the first direction.

Abstract: A liquid discharge apparatus includes: a channel substrate; a first substrate; a piezoelectric element; a spacer, which is provided on a surface of the first substrate on which the piezoelectric element is disposed; a second substrate; and a bump electrode, wherein the spacer is provided between the bump electrode and the piezoelectric element and attached to at least one of the first and second substrates by an adhesive, and wherein both a space on a side of the piezoelectric element with respect to the spacer and a space on a side of the bump electrode with respect to the spacer are opened by at least one of a portion other than a portion of the spacer positioned between the piezoelectric element and the bump electrode and an opening provided in at least one of the first and second substrates.

Abstract: An actuator device includes an actuator substrate having actuators, individual conductors electrically connected with the actuators respectively, and dummy conductors; and a bonding member bonded to a surface of the actuator substrate provided with the individual conductors and the dummy conductors. The individual conductors are aligned in an alignment direction to form a first row and a second row arranged in an orthogonal direction orthogonal to the alignment direction. In a first end portion of the actuator substrate on one side in the alignment direction, first individual conductors are aligned in the alignment direction without intervening second individual conductors therebetween. In a second end portion of the actuator substrate on the other side in the alignment direction, the second individual conductors are aligned in the alignment direction without intervening the first individual conductors therebetween.