Abstract: In order to simplify a step of forming a conductive layer for external connection and improve the reliability thereof, at least either internal individual electrodes or internal common electrodes, which comprise of a piezoelectric vibrator, are connected with each other at through holes situated spaced away from an end face of the piezoelectric vibrator and connected to either a segment electrode of a common electrode, which are formed on one surface in a longitudinal direction of the piezoelectric vibrator. According, it is not necessary to form a conductive layer on the end face or a corner portion where such a layer is hardly formed. Furthermore, even if such portions are slightly broken, the conductivity can be maintained.

Abstract: After assembling an ink jet recording head which includes a plurality of nozzle orifices forming at least one nozzle row, pressure chambers each communicated with the associated nozzle orifice, pressure generating elements each generating pressure fluctuation in ink provided in the associated pressure chamber to eject an ink droplet from the associated nozzle orifice, a natural period of the ink pressure fluctuation in the pressure chamber of the assembled recording head is measured. Then the assembled recording head is classified into a plurality of ranks, based on the measured natural period.

Abstract: An ink jet head 22 of linear form which consists of a plurality of nozzles 27 arranged as a nozzle row 28 is provided in an ink jet device for manufacture of a color filter. Filter element material 13 from the nozzles 27 which differ from the motherboard 12 is discharged four superimposed times by the plurality of nozzles 27, and is formed to a predetermined film thickness upon a single filter element 3. It is possible to prevent the occurrence of undesirable deviations in film thickness between different ones of the filter elements 3, so that it is possible to flatten and make even the optical transparency characteristic of the resulting color filter 1.

Abstract: Common internal electrodes 27 and segment internal electrodes 28 are laminated alternately with a piezoelectric material 29 between and a common external electrode 30 and a segment external electrode 31 are provided on the surface, forming a drive vibrator 24. A free end part 24a of the drive vibrator 24 is formed with an active region L and can be expanded and contracted in the length direction of the vibrator. A piezoelectric material 29 of the outermost layer in the free end part 24a can be operated based on the potential difference between the external and internal electrodes and a portion of the active region L in the external electrode is used as a trimming portion with an effective length x varied by trimming.

Abstract: A manufacturing method for an ink jet recording head has an ink passage unit (1) formed by superposing a nozzle plate (3) with a plurality of nozzles (2) and an ink passage plate (8). The ink passage plate (8) has first and a second surface (8a, 8b), and is provided with a plurality of pressure producing chambers (5) connected to the plurality of nozzles (2), and an ink reservoir (7) communicating with the pressure producing chambers (5) by means of ink inlet ports (6). A cover plate (11) is closely joined to the first surface (8a) of the ink passage plate (8). The cover plate (11) is deformed elastically by piezoelectric vibrators (10) so as to apply pressure to the ink contained in the pressure producing chambers (5). The ink passage plate (8) is a metal sheet (21) having first and second surfaces (8a, 8b) of the ink passage plate (8). A through hole (20) for the ink reservoir (7) is formed from the first surface to the second surface in the metal sheet (21).

Abstract: An ink jet head 22 of linear form which consists of a plurality of nozzles 27 arranged as a nozzle row 28 is provided in an ink jet device for manufacture of a color filter. Filter element material 13 from the nozzles 27 which differ from the motherboard 12 is discharged four superimposed times by the plurality of nozzles 27, and is formed to a predetermined film thickness upon a single filter element 3. It is possible to prevent the occurrence of undesirable deviations in film thickness between different ones of the filter elements 3, so that it is possible to flatten and make even the optical transparency characteristic of the resulting color filter 1.

Abstract: A liquid jetting head of the invention includes a flowing-path plate through which a flowing-path space is formed as a flowing-path for a liquid. A nozzle plate is provided on one side surface of the flowing-path plate, said nozzle plate having a nozzle that is communicated with the flowing-path space. A sealing plate is provided on the other side surface of the flowing-path plate for sealing the flowing-path space. A portion of the other side of the flowing-path space forms a pressure-chamber space. A portion of the other side of the flowing-path plate including at least a portion of the pressure-chamber space is formed by electrocasting. A pressure-generating unit is provided at a portion of the other side of the sealing plate corresponding to the pressure-chamber space for changing a pressure of the liquid in the pressure-chamber space.

Abstract: A liquid jetting head of the invention includes a flowing-path plate through which a flowing-path space is formed as a flowing-path for a liquid. A nozzle plate is provided on one side surface of the flowing-path plate, said nozzle plate having a nozzle that is communicated with the flowing-path space. A sealing plate is provided on the other side surface of the flowing-path plate for sealing the flowing-path space. A portion of the other side of the flowing-path space forms a pressure-chamber space. A portion of the other side of the flowing-path plate including at least a portion of the pressure-chamber space is formed by electrocasting. A pressure-generating unit is provided at a portion of the other side of the sealing plate corresponding to the pressure-chamber space for changing a pressure of the liquid in the pressure-chamber space.

Abstract: A liquid jetting head of the invention includes a flowing-path plate through which a flowing-path space is formed as a flowing-path for a liquid. A nozzle plate is provided on one side surface of the flowing-path plate, said nozzle plate having a nozzle that is communicated with the flowing-path space. A sealing plate is provided on the other side surface of the flowing-path plate for sealing the flowing-path space. A portion of the other side of the flowing-path space forms a pressure-chamber space. A portion of the other side of the flowing-path plate including at least a portion of the pressure-chamber space is formed by electrocasting. A pressure-generating unit is provided at a portion of the other side of the sealing plate corresponding to the pressure-chamber space for changing a pressure of the liquid in the pressure-chamber space.

Abstract: An ink jet recording head has an ink passage unit (1) formed by superposing a nozzle plate (3) with a plurality of nozzles (2) and an ink passage plate (8). The ink passage plate (8) has first and a second surface (8a, 8b), and is provided with a plurality of pressure producing chambers (5) connected to the plurality of nozzles (2), and an ink reservoir (7) communicating with the pressure producing chambers (5) by means of ink inlet ports (6). A cover plate (11) is closely joined to the first surface (8a) of the ink passage plate (8). The cover plate (11) is deformed elastically by piezoelectric vibrators (10) so as to apply pressure to the ink contained in the pressure producing chambers (5). The ink passage plate (8) is a metal sheet (21) having first and second surfaces (8a, 8b) of the ink passage plate (8). A through hole (20) for the ink reservoir (7) is formed from the first surface to the second surface in the metal sheet (21).

Abstract: A piezoelectric vibrating plate covered by a conductive layer at a vibrating distal end of the vibrating plate and at an obverse face. Slits cut in the conductive layer separate piezoelectric vibrators in a first area of the vibrating plate from non-vibrating dummy vibrators in a second area of the vibrating plate.

Abstract: First internal electrode layers and second internal electrode layers are alternately laminated in a substrate while sandwiching piezoelectric material layer therebetween. The first internal electrode layers are exposed to a first end face of the substrate, and the second internal electrode layers are exposed to a second end face of the substrate which is opposite to the first end face. A first external electrode layer is formed on the first end face and a third end face connecting the first end face and the second end face. A second external electrode layer is formed on the second end face and the third end face. The second external electrode layer is electrically independent from the first external electrode layer. The first external electrode layer and the first internal electrode layers are to be divided by slits extending from the first end face to form a plurality of piezoelectric elements arrayed in a first direction.

Abstract: First internal electrode layers and second internal electrode layers are alternately laminated in a substrate while sandwiching piezoelectric layers therebetween. The first internal electrode layers are exposed to at least a first end face of the substrate, and the second internal electrode layers are exposed to at least a second end face of the substrate which is opposite to the first end face. A first external electrode layer is formed on the first end face and a third end face connecting the first end face and the second end face. The first external electrode layer is electrically connected to the first internal electrode layers A second external electrode layer is formed on at least the second end face and the third end face. The second external electrode layer is electrically connected to the second internal electrode layers, and is electrically independent from the first external electrode layer.

Abstract: An ink-jet recording head has a plate-shaped member including a first layer with a partition wall formed by a first etching process and defining a pressure chamber, an ink inlet passage and a common ink storage chamber, a second layer with a land formed by a second etching process so as to correspond to the pressure chamber, and an intermediate layer sandwiched between the first and the second layers. The recording head also has a pressure producing device disposed with its extremity in contact with the land, and a nozzle plate with a nozzle hole bonded to the front surface of the plate-shaped member. An ink particle is jetted through the nozzle hole when the pressure in the pressure chamber is changed by the pressure producing device.

Abstract: A jetting head is provided with a nozzle orifice, a pressure chamber communicated with the nozzle orifice, and a piezoelectric element which is deformable to cause pressure fluctuation to liquid contained in the pressure chamber. A drive signal generator simultaneously generates a plurality of drive signals, each provided with waveform elements including at least one drive pulse in every unit jetting cycle. The drive pulse deforms the piezoelectric element to cause such pressure fluctuation as to eject a liquid droplet from the nozzle orifice. A switcher selectively supplies at least one of the waveform elements included in one of the drive signals to the piezoelectric element. A switch controller controls a selective supply operation of the switcher in accordance with amount data which indicates an amount of the liquid droplet to be ejected. A time period in which the drive pulse is generated in one of the drive signal and that in another one of the drive signals overlap at least partly.

Abstract: A nozzle plate of the invention has nozzle opening including a taper part 2 for guiding ink in a pressure generation chamber and a straight pore part 3 formed contiguous with the taper part.

Abstract: Common internal electrodes 27 and segment internal electrodes 28 are laminated alternately with a piezoelectric material 29 between and a common external electrode 30 and a segment external electrode 31 are provided on the surface, forming a drive vibrator 24. A free end part 24a of the drive vibrator 24 is formed with an active region L and can be expanded and contracted in the length direction of the vibrator. A piezoelectric material 29 of the outermost layer in the free end part 24a can be operated based on the potential difference between the external and internal electrodes and a portion of the active region L in the external electrode is used as a trimming portion with an effective length x varied by trimming.

Abstract: A manufacturing method of manufacturing a liquid jet head which has a plurality of piezoelectric vibrators, each having, at least in part, a laminate structure of electrodes and at least one layer of piezoelectric material. An ejection characteristic measurement step applies a similar drive signal to all of the piezoelectric vibrators to eject liquid from the nozzle openings. The liquid ejection characteristics are measured in a one-by-one basis of the nozzle openings. An ejection characteristic adjustment step sets a treatment condition for at least one of the piezoelectric vibrators based on a result of measurement by the ejection characteristic measurement step. At least one piezoelectric vibrator is subjected to a displacement amount adjustment based on the set treatment condition by trimming away a portion of an external electrode, thereby making the liquid ejection characteristic associated with the nozzle openings uniform.

Abstract: A pressurizing chamber 1 is formed as a recess by half etching of a silicon single-crystal substrate 2. A nozzle communicating hole 6 through which the pressurizing chamber 1 is connected to a nozzle opening 5 is formed as a through hole which is smaller in width than the pressurizing chamber 1. The pressurizing chamber 1 is connected to the nozzle opening 5 in the other face via the nozzle communicating hole 6 while reducing the volume of the pressurizing chamber 1 to a degree as small as possible. The silicon single-crystal substrate is used as a member constituting a spacer so that an ink drop of a reduced ink amount suitable for high density printing flies with high positioning accuracy.

Abstract: Common internal electrodes and segment internal electrodes are laminated alternately with a piezoelectric material between and a common external electrode and a segment external electrode are provided on the surface, forming a drive vibrator. A free end part of the drive vibrator is formed with an active region and can be expanded and contracted in the length direction of the vibrator. A piezoelectric material of the outermost layer in the free end part can be operated based on the potential difference between the external and internal electrodes and a portion of the active region in the external electrode is used as a trimming portion with an effective length varied by trimming.