Abstract: A system for irradiating a microplate may include a light engine with a plurality of light sources, such as light-emitting diodes, included in one or more linear arrays. The plurality of light sources are configured to emit germicidal irradiation, which is directed to the microplate by optical components, such as optical lenses positioned on top of each well of the microplate. The linear array is linearly movable so that as the linear array scans across the microplate, the optical components direct the germicidal irradiation to a plurality of surfaces of each well.

Abstract: The present invention discloses a stress sensor structure and a manufacturing method thereof, wherein the stress sensor structure comprises: a substrate; a blind-hole, provided on a first surface of the substrate; a first piezoresistive layer and a second piezoresistive layer, formed by material with piezoresistive effect, provided on a lateral wall of the blind-hole and interconnected at bottom portions of the layers; a second insulating layer, provided between the first piezoresistive layer and the second piezoresistive layer; a first electrode, provided on the first surface of the substrate and connected to the first piezoresistive layer; a second electrode, provided on the first surface of the substrate and connected to the second piezoresistive layer.

Abstract: The electronic card with printed circuit comprises at least one diffraction structure (DS) having a cavity (15) and a diffraction plate (17). In accordance with the invention, the diffraction structure is incorporated in the thickness of the electronic card with printed circuit, the cavity being formed, by removal of material, in the thickness of the electronic card with printed circuit and the diffraction plate being formed in a plate which is arranged on the electronic card with printed circuit and closes the cavity.

Abstract: A motherboard and a manufacturing method thereof, a cover plate and a manufacturing method thereof, and a display device are provided. The manufacturing method of the motherboard includes: forming an ink pattern layer on a base substrate, the ink pattern layer including a plurality of hollow regions; applying a curable liquid onto the base substrate to cover the ink pattern layer; and curing the curable liquid to form a cured layer covering the ink pattern layer.

Abstract: A three-dimensional (“3D”) structure for handling fluids, a fluid handling device containing the 3D structure, and a method of making the 3D structure. The method includes providing a composite photoresist material that includes: (a) a first layer devoid of a hydrophobicity agent and (b) at least a second layer comprising the hydrophobicity agent. The composite photoresist material is devoid of an adhesion promotion layer between layers of the composite photoresist material.

Abstract: A liquid detecting apparatus includes an ultrasonic sensor that transmits and receives an ultrasonic wave, and includes a piezoelectric layer which is formed of a thin film and an ultrasonic element which is provided with a first electrode and a second electrode to interpose the piezoelectric layer between the first electrode and the second electrode, on a diaphragm which is disposed on a substrate having a cavity, and a flow path that forms the same liquid level as a liquid level of a liquid which is stored in a container, in which an acoustic matching layer and a detection surface of a surface of a lens, which are disposed on a side of the ultrasonic sensor that transmits and receives the ultrasonic wave, are disposed to be in contact with the liquid within the flow path.

Abstract: The present invention contains a printing apparatus and a method, e.g., for ejecting inks (i.e., pure liquids, mixtures, colloids, etc.) for a very broad range of physical properties (such as viscosity). Acoustic forces 3a may be generated by an emitter 1 and a reflector 2 to detach droplets 10 from a nozzle 6. The ink may be advanced through the nozzle 6 by a standard back pressure system 5. A reflectorless chamber 7 may enhance acoustic forces 8a and the droplets 10 may be ejected at a bottom 9 of said chamber 7, so that droplets 10 may be deposited on any substrate 11.

Abstract: A vibration generating unit includes an element unit, and the element unit includes a piezoelectric element generating an ultrasonic vibration by being supplied with electric power. A proximal-side fixing member abuts on the element unit from a proximal direction side and a distal-side fixing member abuts on the element unit from a distal direction side such that the element unit is sandwiched between the proximal-side fixing member and the distal-side fixing member in a longitudinal direction. The distal-side fixing member has a greater acoustic impedance than the proximal-side fixing member.

Abstract: Focused acoustic radiation, referred to as tonebursts, are applied to a volume of liquid to generate a set of droplets. The droplets generated are substantially smaller in scale than the focal spot size of the acoustic beam (e.g., the frequency at which the acoustic transducer operates). Further, the droplets have trajectories that are substantially in the direction of the acoustic beam propagation direction. In one embodiment, a first toneburst is applied to temporarily raise a protuberance on a free surface of the fluid. After the protuberance has reached a certain state, a second toneburst is applied to the protuberance to break it into very small droplets. In one embodiment, the state of the protuberance at which the second toneburst is supplied is the time period shortly after the protuberance reaches its maximum height but before the protuberance recedes back into the volume of fluid.

Abstract: In accordance with one embodiment, an inkjet head comprises a plurality of groove-shaped pressure chambers formed on piezoelectric members of which the polarization directions are opposite, and a nozzle plate arranged at the lateral side of the pressure chambers across a lid section with high rigidity. A plurality of through holes connected to a plurality of nozzles formed on the nozzle plate is formed in the lid section. The inkjet head is set in a range of 10-25% before and after a center, that is, a length ratio where the relation between ejection voltage of ink ejected from the nozzles and a length ratio between the length of the through hole of the lid section in the longitudinal direction of the pressure chamber and the length of the pressure chamber in the longitudinal direction of the pressure chamber is minimized.

Abstract: A first flushing pulse is a drive waveform for ejecting ink by displacing a meniscus onto a pressure chamber side and an ejecting side while interposing a standby position from the standby position, a second flushing pulse is a drive waveform for ejecting the ink by pushing out the meniscus onto the ejecting side, without substantially displacing the meniscus onto the pressure chamber side from the standby position, and in a flushing processing, after a first flushing processing is performed by ejecting the ink one or more times in accordance with the first flushing pulse, a second flushing processing is performed by ejecting the ink a plurality of times in accordance with the second flushing pulse.

Abstract: A liquid ejection head, including: a plurality of ejection ports from which a liquid is ejected; a plurality of pressure chambers which communicate with the plurality of ejection ports and are constituted by piezoelectric portions that eject a liquid from the ejection ports by shrink-deforming; and a control unit configured to drive the piezoelectric portions so that the pressure chambers shrink-deform, wherein the control unit controls driving timing of the piezoelectric portions such that, after any of the plurality of pressure chambers is made to shrink-deform, a pressure chamber disposed not to adjoin the shrink-deformed pressure chamber is made to shrink-deform.

Abstract: A data processing apparatus, a data processing method and an inkjet printing apparatus are offered that are capable of reducing, in any kind of image, the occurrence of color unevenness while achieving a high speed output via a bi-directional printing. In order to achieve this, forward scan print ratio and backward scan print ratio with respect to a predetermined area comprising a plurality of pixels is set based on multi-value image data of the predetermined area. Next, binary print data for the forward scans and binary print data for the backward scans at the predetermined area is generated based on the multi-value image data and the set print ratios. According to such a configuration it is possible to increase the ratio of bi-directional printing with respect to areas at which color unevenness appears with difficulty, and increase the ratio of one-directional printing at areas where color unevenness appears with ease.

Abstract: A printing device, which prints an image on a recording medium using a printing head which has a nozzle row, where a plurality of nozzles are aligned in a first direction, for each color of ink, including: a printing control section which executes a plurality of cycles of a dot forming action, where dots are formed on the recording medium along a second direction which intersects with the first direction by discharging ink from the nozzles while the printing head is moved in the second direction, and a transport action, where the recording medium is relatively transported in the first direction with regard to the printing head after completion of the dot forming action.

Abstract: Disclosed is a transfer member including a permeable layer, a pigment layer formed on the permeable layer by an ink jet method, and an adhesive layer having adhesivity formed on the pigment layer, wherein a dispersion medium of an ink containing a pigment to form the pigment layer permeates into the permeable layer.

Abstract: The invention provides a device and a method for flow cytometric fractionation of particles contained in a fluid stream, wherein sections of the fluid stream, especially droplets if the fluid stream is a droplet stream, are irradiated with a laser. The laser disposed for the irradiation of the sections of the fluid stream can have a wavelength which is absorbed by the fluid and can have a sufficient radiation duration and radiation intensity to deflect sections of the fluid stream.

Abstract: An apparatus for dispensing one or more cells or particles confined in a free flying droplet has a droplet generating device configured to eject out of an orifice a free flying droplet of a suspension of cells or particles. The droplet generating device has a branch-less one-way channel having the orifice at one end thereof. A device for detecting information on cells or particles located in an observation volume of the suspension within the branch-less one-way channel is provided. An ejected droplet is directed to a first position or a second position depending on the detected information.

Abstract: The invention provides apparatuses and methods for acoustically ejecting the fluid from a reservoir contained in or disposed on a substrate. The reservoir has a portion adapted to contain a fluid, and an acoustic radiation generator is positioned in acoustic coupling relationship to the reservoir. Acoustic radiation generated by the acoustic radiation generator is transmitted through at least the portion of the reservoir to an analyzer. The analyzer is capable of determining the energy level of the transmitted acoustic radiation and raising the energy level of subsequent pulses to a level sufficient to eject fluid droplets from the reservoir. The invention is particularly suited for delivering fluid from a plurality of reservoirs in an accurate and efficient manner.

Abstract: Fluid ejection nozzles having a tapered section leading to a straight walled bore are described. Both the tapered section of the nozzle and the straight walled bore are formed from a single side of semiconductor layer so that the tapered section and the bore are aligned with one another, even when an array of nozzles are formed across a die and multiple dies are formed on a semiconductor substrate.

Abstract: A print head configured for ejecting droplets of ink comprises a nozzle surface having arranged thereon at least one nozzle and a pattern of wetting sections and anti-wetting sections, arranged around the nozzle. The wetting sections interchange on a circular line, concentric with the nozzle, with anti-wetting sections. The pattern of wetting sections and anti-wetting sections is configured such that it provides a driving force for droplets to move away from the nozzle. The invention further relates to a printing apparatus, comprising said nozzle.

Abstract: An inkjet printer includes an ejector, a wave guide, an electromagnetic wave supplier, and a reflector. The ejector is configured to eject ink toward a medium. Through the wave guide, the medium with the ink ejected by the ejector is inserted. The electromagnetic wave supplier is disposed at a start end of the wave guide to supply electromagnetic waves to the wave guide. The reflector is disposed at a terminal end of the wave guide to reflect the electromagnetic waves supplied by the electromagnetic wave supplier.

Abstract: Fluid ejection nozzles having a tapered section leading to a straight walled bore are described. Both the tapered section of the nozzle and the straight walled bore are formed from a single side of semiconductor layer so that the tapered section and the bore are aligned with one another, even when an array of nozzles are formed across a die and multiple dies are formed on a semiconductor substrate.

Abstract: Invention methods employ the use of acoustic waves to transfer small amounts of fluid in a non-contact manner. In invention methods, acoustic waves are propagated through a separated pool of a source fluid in such a manner that causes the ejection of a single micro-droplet from the surface of the pool. The droplet is ejected towards a target with sufficient force to provide for contact of the droplet with the target. Because the fluid is not contacted by any fluid transfer device such as a pipette, the opportunities for contamination are minimized. Invention methods may be employed to transfer fluids from an array of source sites to an array of target sites, thereby enabling the precision automation of a wide variety of procedures including screening, and synthesis procedures commonly used in biotechnology.

Abstract: An ink jet printing apparatus and an ink jet printing method which use a print head having a plurality of ejection port rows to enable high-quality printing without causing uneven density in a conveying direction by varying the printing distribution ratio of the ejection port rows in the print head depending on gray level.

Abstract: A printhead has a plurality of nozzle arrangements. Each nozzle arrangement includes a wafer substrate defining a nozzle chamber, said chamber having a roof wall with an ink ejection port defined therein and an ink supply channel defined through the substrate for supplying the chamber with ink; a magnetic coil arrangement positioned around the inlet of the nozzle chamber; bridge members spanning over the magnetic coil arrangement, the bridge members being supported on support posts protruding from the magnetic coil arrangement and having a resilient characteristic; and a magnetic paddle supported from the bridge members over the inlet, the magnetic paddle for ejecting ink from the chamber via the ejection port.

Abstract: To ejecting a droplet from a reservoir, the reservoir holding a fluid is moved with respect to an acoustic ejector. As the reservoir and ejector move closer together, the acoustic ejector sends one or more interrogation pulses towards the reservoir. Based on the interrogation pulses, the system determines when the movement of the reservoir has placed a free surface of the fluid in a position where a droplet can be ejected.

Abstract: The apparatus and method use an optical feedback system to align a transducer with a stent strut. Once alignment is achieved, the transducer causes a coating to be ejected onto the stent strut and the transducer is moved along the stent strut to coat the stent strut.

Abstract: A nozzle plate for a micro-fluid ejection head, a method of making a hydrophobic nozzle plate, and a method for improving the resiliency of a nozzle plate. The nozzle has a photoimageable hydrophobic polycyclic polyolefin layer derived from an epoxy functionalized polynorbornene.

Abstract: An inkjet printhead includes an ink flow path including a nozzle through which ink is ejected and is formed of a conductive epoxy resin, the conductive epoxy resin is a hardening result of a conductive cross-linked polymer resist composition formed by actinic radiation, and the conductive cross-linked polymer resist composition includes (a) at least one epoxy precursor polymer selected from a phenol novolak precursor polymer and an alicyclic precursor polymer including glycidyl ether group, (b) a metal alkoxide compound represented by the following formula R?M(OR)n, where R? refers to a functional group including an oxirane group or an oxetanyl group, R refers to a C1-10alkyl group, and M is a metal selected from the group consisting of Al, Ti, and Zr, (c) a cationic photoinitiator, and (d) a solvent. The inkjet printhead includes an ink flow path formed of a conductive epoxy resin and a trench formed around a heater of the inkjet printhead to dissipate residual heat generated by the heater.

Abstract: The invention provides an inkjet printer that gives an excellent print quality by accelerating the traveling speed of an ink droplet ejected from a nozzle of the inkjet head. The inkjet printer includes the inkjet head having a surface forming a nozzle and adapted to eject droplets from the nozzle, an ultrasound radiator mounted on both sides of the surface and adapted to radiate ultrasound in the direction of the ink droplets that have been ejected and imparting a pressure, in flight, to the ink droplets that have been ejected, and a recording medium conveying unit for moving a recording medium relative to the inkjet head.

Abstract: The present invention relates to arrays of peptidic molecules and the preparation of peptide arrays using focused acoustic energy. The arrays are prepared by acoustically ejecting peptide-containing fluid droplets from individual reservoirs towards designated sites on a substrate for attachment thereto.

Abstract: The mist ejection head comprises: a nozzle ejecting a liquid in a form of a mist; a liquid chamber connected to the nozzle; an ultrasonic wave generating element which is disposed on a side wall of the liquid chamber and which generates an ultrasonic wave in such a manner that the ultrasonic wave is applied to the liquid inside the liquid chamber; and a reflector having a reflecting surface which reflects the ultrasonic wave generated by the ultrasonic wave generating element in such a manner that the ultrasonic wave is directed toward a center of the liquid chamber and concentrated at a focal point situated in a vicinity of the nozzle inside the liquid chamber.

Abstract: An inkjet recording system includes an inkjet recording head in which a part of wall face of a pressure chamber in which a nozzle is provided is formed of a piezoelectric element. Centerline average roughness Ra of the piezoelectric element is 0.05 to 2 ?m, viscosity of the ink is 2.0 to 10.0 mPa·s, and the following expression (1) is satisfied; r ? ? ? ? ? cos ? ? ? 2 ? ? ? ? 0.07 ( 1 ) wherein r represents centerline average roughness (?m) of surface of piezoelectric element forming wall face of the pressure chamber, ? represents surface tension (mN/m) of ink, ? represents viscosity of ink (mPa·s), and ? represents contact angle (degree) of ink with respect to piezoelectric element.

Abstract: An apparatus and method for coating abluminal surface of a stent is described. The apparatus includes a stent support, a coating device, and an imaging system. The coating device includes a solution reservoir and transducer assembly. The transducer assembly includes a plurality of transducers and a controller. Each transducer is used to generate focused acoustic waves in the coating substance in the reservoir. A controller is communicated to an image system to enable the transducers to generate droplets on demand and at the predetermined ejection points on the surface of the coating substance to coat the stent. A method for coating a stent includes stent mounting, stent movement, and droplet excitation.

Abstract: The mist spraying apparatus includes: a liquid chamber filled with liquid; a mesh member which is disposed on a liquid ejection side of the liquid chamber, has a net shape, and retains a free surface of the liquid filled in the liquid chamber, the mesh member including an intersection point to form the net shape; and an ultrasonic wave generating device which is disposed at a position opposing the intersection point of the mesh member and emits an ultrasonic wave into the liquid.

Abstract: The invention provides apparatuses and methods for acoustically ejecting the fluid from a reservoir contained in or disposed on a substrate. The reservoir has a portion adapted to contain a fluid, and an acoustic radiation generator is positioned in acoustic coupling relationship to the reservoir. Acoustic radiation generated by the acoustic radiation generator is transmitted through at least the portion of the reservoir to an analyzer. The analyzer is capable of determining the energy level of the transmitted acoustic radiation and raising the energy level of subsequent pulses to a level sufficient to eject fluid droplets from the reservoir. The invention is particularly suited for delivering fluid from a plurality of reservoirs in an accurate and efficient manner.

Abstract: Features described herein relate to ejecting drops from a thin layer of fluid. Piezoelectric elements can generate a uniform high acoustic field, which is transferred through a segmented metal support structure and an acoustic horn. The sound waves generate capillary waves on a thin layer of fluid on a top surface of the acoustic horn. At sufficiently high amplitudes, the capillary waves begin to break apart, resulting in the ejection of drops from the thin layer of fluid.

Abstract: The invention provides apparatuses and methods for acoustically ejecting the fluid from a reservoir contained in or disposed on a substrate. The reservoir has a portion adapted to contain a fluid, and an acoustic radiation generator is positioned in acoustic coupling relationship to the reservoir. Acoustic radiation generated by the acoustic radiation generator is transmitted through at least the portion of the reservoir to an analyzer. The analyzer is capable of determining the energy level of the transmitted acoustic radiation and raising the energy level of subsequent pulses to a level sufficient to eject fluid droplets from the reservoir. The invention is particularly suited for delivering fluid from a plurality of reservoirs in an accurate and efficient manner.

Abstract: The mist ejection head has: a nozzle plate in which a nozzle hole for ejecting liquid is formed; a liquid chamber connected to the nozzle hole; an ultrasonic wave generating device which applies an ultrasonic wave to the liquid in the liquid chamber; and a reflective wall which reflects the ultrasonic wave applied to the liquid, wherein: the reflective wall is disposed so as to oppose the nozzle plate and has an axially symmetrical shape comprising a portion of a parabolic surface, the portion including an apex of the parabolic surface and being on an apex side with respect to a focal point of the parabolic surface; an axis of the parabolic surface passes through the nozzle hole; and the focal point of the parabolic surface is positioned in a vicinity of the nozzle hole.

Abstract: A highly-efficient ultrasonic wave ink-jet head includes a piezoelectric transducer and a Fresnel lens provided on a supporting layer. A chamber structure is fabricated on the supporting layer by lithography etching, and further bonded with an ink-storing groove to form an ink-jet head. The design provides a total reflection of ultrasonic waves generated on the opposite side of the piezoelectric transducer through the deviation of acoustic impedance of ultrasonic waves at different media. The sound energy of the ultrasonic wave can be effectively reused. Moreover, the phase of the reflected ultrasonic wave is consistent with that of the direct ultrasonic wave generated by the piezoelectric transducer. This forms a highly-efficient ultrasonic wave ink-jet head.

Abstract: An inkjet recording apparatus includes: a head unit including: an ultrasonic wave generation unit that generates ultrasonic waves; an ultrasonic wave focus unit that focuses the ultrasonic waves to an ultrasonic wave focus position; an ultrasonic wave transmission unit that propagates the ultrasonic waves from the ultrasonic wave focus unit; and a wall plate that covers the ultrasonic wave generation unit, the ultrasonic wave focus unit and the ultrasonic wave transmission unit; an annular film that rotates while sliding along an exterior of the head unit; a film drive mechanism that rotates the film; and an ink application unit that applies ink over the film to form an ink layer, wherein the ultrasonic wave focus position of the head unit is directing to a position of the ink layer so as to eject an ink from the ink layer.

Abstract: Described herein are methods, devices and reagents for direct thermal imaging and, more particularly, for multicolor direct thermal imaging, wherein a direct thermal imaging member comprising different image-forming compositions is imaged at different speeds by a source of heat to form a multicolored image.

Abstract: A method for producing a nozzle plate comprises a liquid-repellant coat removal step for conducting a plasma treatment to each chip from a same side as a liquid droplet ejecting surface under an atmospheric pressure, while supplying a gaseous mask material for protection of the liquid-repellant coat through nozzle holes from an opposite side of the liquid droplet ejecting surface in such a manner that the gaseous mask material is leaked out over the liquid droplet ejecting surface around the nozzle holes, to thereby remove the liquid-repellant coat exposed outside the mask material; and a bonding step for bonding each chip to the nozzle plate body at the area from which the liquid-repellant coat is removed by the liquid-repellant coat removal step.

Abstract: A printing system includes a liquid drop ejector, a fluid passage, and a fluid flow source. The liquid drop ejector is operable to form liquid drops having a plurality of volumes moving along a first path. The fluid passage includes a wall. A source of acoustic energy is associated with the wall. A fluid flow source is associated with the passage and is configured to provide a fluid flow through the passage. Interaction of the fluid flow and the liquid drops causes liquids drops having one of the plurality of volumes to begin moving along a second path.

Abstract: The liquid ejection head has: a surface acoustic wave propagation body in which a surface acoustic wave propagates; a nozzle orifice formed in the surface acoustic wave propagation body; a surface acoustic wave generation device which is provided on the surface acoustic wave propagation body around the nozzle orifice and excites the surface acoustic wave propagation body so that a surface acoustic wave is generated in the surface acoustic wave propagation body; a liquid supply device which supplies liquid to the nozzle orifice; and a guide member which is provided in a center of the nozzle orifice and has a tapered conical surface shape section that projects from an ejection surface of the nozzle orifice in an ejection direction, the liquid forming a curved liquid surface in the nozzle orifice in accordance with the tapered conical surface shape section due to surface tension, wherein the surface acoustic wave generates a capillary wave which propagates through the curved liquid surface in the nozzle orifice

Abstract: Devices and methods for depositing fluids on substrates in patterns of spots, lines, or other features use a nozzle, which is preferably configured similarly to a micropipette, having a piezoelectric crystal or other ultrasonic actuator coupled to one of its sides. The nozzle may be charged via capillary action by dipping it into a well containing the fluid to be deposited, and may then be positioned over a desired area of a substrate, at which point activation of the ultrasonic actuator at ultrasonic frequencies will eject the fluid onto the substrate. The needle may subsequently be dipped into a well of rinsing fluid for cleaning. Spots or lines on the order of 5 micrometers width may be generated, making the invention particularly suitable for use in biological applications such as microarray production and in microelectronics applications such as the printing of organic circuitry.

Abstract: A highly-efficient ultrasonic wave ink-jet head includes a piezoelectric transducer and a Fresnel lens provided on a supporting layer. A chamber structure is fabricated on the supporting layer by lithography etching, and further bonded with an ink-storing groove to form an ink-jet head. The design provides a total reflection of ultrasonic waves generated on the opposite side of the piezoelectric transducer through the deviation of acoustic impedance of ultrasonic waves at different media. The sound energy of the ultrasonic wave can be effectively reused. Moreover, the phase of the reflected ultrasonic wave is consistent with that of the direct ultrasonic wave generated by the piezoelectric transducer. This forms a highly-efficient ultrasonic wave ink-jet head.

Abstract: A method for fabricating a cliché including: providing a transparent glass substrate; depositing a metal layer on the substrate; patterning the metal layer and thereby forming a first metal pattern; etching the glass substrate by using the first metal pattern as a mask and thereby forming a first convex pattern; patterning the first metal pattern and thereby forming a second metal pattern; and etching the first convex pattern by using the second metal pattern as a mask and thereby forming a second convex pattern.

Abstract: Methods are provided for analyzing characteristics of fluids in the context of an acoustic ejection system. Such a system has a controller, an acoustic radiation generator, and a coupling medium coupling the radiation to a reservoir holding fluid. The methods can use acoustic radiation to both perturb a surface of the fluid in the reservoir and analyze the effect of the perturbation. The methods may use information about prior fluids. The methods of the invention can determine physical characteristics such as speed of sound and viscosity. The methods also include ways to determine a level of acoustic energy suitable to eject a droplet. Preferably the methods are executed automatically under control of programming of a controller of an acoustic ejection system.

Abstract: There is provided a printing device configured to eject a dispersed body containing a solid particle and a liquid. The printing device includes a film and an acoustic head. The film has a first major surface and a second major surface on an opposite side of the first major surface. The first major surface is provided with a first recess accommodating the liquid and a second recess provided on a bottom face of the first recess and accommodating the solid particle. The acoustic head focuses an acoustic wave from a side of the second major surface toward the first recess and the second recess. Thus, even in the case of discharging a dispersed body containing solid particles, it is possible to uniformize the amount of solid particles contained in ejected droplets and it is possible to uniformly make a print.