WO1999062712A1 - Tete d'ecriture a jet d'encre et procede de fabrication associe - Google Patents
Tete d'ecriture a jet d'encre et procede de fabrication associe Download PDFInfo
- Publication number
- WO1999062712A1 WO1999062712A1 PCT/JP1999/002945 JP9902945W WO9962712A1 WO 1999062712 A1 WO1999062712 A1 WO 1999062712A1 JP 9902945 W JP9902945 W JP 9902945W WO 9962712 A1 WO9962712 A1 WO 9962712A1
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- WIPO (PCT)
- Prior art keywords
- piezoelectric element
- pressure chamber
- joined
- piezoelectric
- external electrodes
- Prior art date
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- 238000004519 manufacturing process Methods 0.000 title claims description 46
- 239000000463 material Substances 0.000 claims description 39
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 238000005304 joining Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 9
- 238000005520 cutting process Methods 0.000 claims description 6
- 238000010030 laminating Methods 0.000 claims description 5
- 238000006073 displacement reaction Methods 0.000 description 21
- 239000010410 layer Substances 0.000 description 21
- 239000000919 ceramic Substances 0.000 description 7
- 230000005684 electric field Effects 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 238000007747 plating Methods 0.000 description 6
- 239000002356 single layer Substances 0.000 description 6
- 238000004544 sputter deposition Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 238000007639 printing Methods 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000001459 lithography Methods 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 238000000206 photolithography Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1623—Manufacturing processes bonding and adhesion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2/14201—Structure of print heads with piezoelectric elements
- B41J2/14274—Structure of print heads with piezoelectric elements of stacked structure type, deformed by compression/extension and disposed on a diaphragm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1607—Production of print heads with piezoelectric elements
- B41J2/1612—Production of print heads with piezoelectric elements of stacked structure type, deformed by compression/extension and disposed on a diaphragm
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1631—Manufacturing processes photolithography
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/1632—Manufacturing processes machining
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/164—Manufacturing processes thin film formation
- B41J2/1643—Manufacturing processes thin film formation thin film formation by plating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/16—Production of nozzles
- B41J2/1621—Manufacturing processes
- B41J2/164—Manufacturing processes thin film formation
- B41J2/1646—Manufacturing processes thin film formation thin film formation by sputtering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/135—Nozzles
- B41J2/14—Structure thereof only for on-demand ink jet heads
- B41J2002/14387—Front shooter
Definitions
- the present invention relates to an ink jet recording head and a method of manufacturing the same, and more particularly to an ink jet recording head used in a printer, a facsimile, a copying machine, and the like, and a method of manufacturing the same.
- an ink jet recording head of this type is disclosed in, for example, Japanese Patent Application Laid-Open No. Hei 9-174836.
- FIG. 13 is a cross-sectional view of a conventional ink jet recording head disclosed in Japanese Patent Application Laid-Open No. Hei 9-174836.
- the pressure chambers 2a, 2b, and 2c filled with the ink 1 have upper walls formed of diaphragms 3a, 3b, and 3c.
- the diaphragms 3a, 3b, 3c are joined to the piezoelectric elements 101a, 101b, 101c, respectively.
- the piezoelectric elements 101a, 101b, and 101c are joined to and integrated with the base portion 102 on the surface opposite to the surface joined to the diaphragm.
- FIG. 14 is a cross-sectional view taken along line DD of FIG.
- the pressure chamber 2a communicates with the nozzle 4a.
- the pressure chamber 2a communicates with the ink pool 6 via the ink supply port 5a.
- the piezoelectric element 101a is an inactive area 201a, 202a that indicates an area in which no distortion occurs even when a driving voltage is applied to the electrode, and is fixed to a component of the pressure chamber 2a.
- An active area 203a indicating an area where distortion occurs is connected to the diaphragm 3a. The same applies to the other pressure chambers 2b and 2c.
- the generated displacement of the piezoelectric element 101a is transmitted to the pressure chamber 2a via the diaphragm 3a and the pressure chamber 2a. Since the ink 1 in a is compressed, the ink droplet can be ejected from the nozzle.
- the generated crosstalk causes the drop speed and drop diameter of the ink droplet to be ejected to fluctuate according to the number of simultaneously driven nozzles (the number of piezoelectric elements).
- the ink droplet landing position shift and print density causes unevenness.
- crosstalk causes print quality deterioration.
- a main object of the present invention is to prevent the occurrence of crosstalk in which vibration based on the displacement of a driving piezoelectric element is transmitted to a non-driving pressure chamber, thereby improving printing quality.
- a first invention of the present invention is directed to a pressure chamber having a plurality of pressure chambers, each of which communicates a recording head with a nozzle and an ink supply port and has one vibrating wall on the surface in the same direction. And a plurality of piezoelectric elements each having two external electrodes and joined to the plurality of vibrating walls, respectively, and the piezoelectric elements are internally formed when a voltage is applied between the external electrodes.
- the active area is joined to the vibration wall of the pressure chamber, and the inactive area is pressurized. It is designed to connect only to the room.
- the plurality of piezoelectric elements are joined only to the corresponding pressure chambers in the inactive region, and there is no other means for fixing the positional relationship between the piezoelectric elements.
- the displacement of the element is prevented from being transmitted to the non-driven piezoelectric element, and the non-driven piezoelectric element is prevented from vibrating in the displacement direction.
- the piezoelectric element further includes a plurality of piezoelectric material layers and a plurality of internal electrode layers alternately stacked, and the internal electrodes are stacked layers.
- the piezoelectric elements are alternately stacked one by one in the direction perpendicular to the direction, and alternately connected to two external electrodes provided on both side surfaces of the piezoelectric element in the direction in which the internal electrodes are shifted.
- the element is joined to the vibrating wall in an active region in which all of the internal electrodes are stacked with a predetermined width and stacked, and is present near the two external electrodes and every other layer of the internal electrode is present. It is joined to the pressure chamber in an inactive region stacked and stacked. As a result of this configuration, a sufficient displacement can be given to the vibration wall even if the width in the direction orthogonal to the laminating direction is narrowed, so that the pressure chambers can be arranged with high density.
- the piezoelectric element further includes a piezoelectric material, and a direction orthogonal to a row direction of the pressure chambers of the piezoelectric material (that is, a horizontal arrangement direction of the plurality of pressure chambers).
- a non-piezoelectric material joined on both sides in the direction in which the pressure chambers are formed, and two external electrodes formed on at least two surfaces facing each other in a direction parallel to a row direction of the pressure chambers provided on a part of the piezoelectric material.
- the piezoelectric element is joined to the vibration wall by the piezoelectric material, and is joined to the pressure chamber by non-piezoelectric materials on both sides of the piezoelectric material.
- the pressure chambers can be arranged at a high density, and an inexpensive single-layer piezoelectric element is used instead of expensive multilayer piezoelectric elements, so that a low-cost ink jet recording head can be obtained.
- a seventh invention is a method for manufacturing an ink jet recording head, comprising: a length of a plurality of pressure chambers in a column direction of the pressure chambers, wherein the pressure chambers are formed continuously over the entire length in the column direction.
- the pressure joined to the pressure chamber unit A third step of cutting and separating the electric element block to form a plurality of piezoelectric elements respectively corresponding to the plurality of pressure chambers.
- FIG. 1 is a sectional view showing Embodiment 1 of an ink jet recording head according to the present invention.
- FIG. 2 is a sectional view taken along line AA of FIG.
- FIG. 3 is a sectional view showing Embodiment 2 of the ink jet recording head.
- FIG. 4 is a sectional view taken along line BB of FIG.
- FIG. 5 is an exploded perspective view showing the manufacturing method 1 of the recording head shown in FIGS.
- FIG. 6A is a perspective view showing a state where the pressure chamber unit and the piezoelectric element block are joined.
- FIG. 6B is a perspective view of a state where the piezoelectric element block joined to the pressure chamber unit is cut and separated.
- FIG. 7A is a perspective view showing a manufacturing method (manufacturing method 2) of the piezoelectric element block according to the second embodiment of FIGS. 3 and 4.
- FIG. 7B is a perspective view showing the method for manufacturing the piezoelectric element block according to the second embodiment shown in FIGS. 3 and 4.
- FIG. 7C is a perspective view showing the method for manufacturing the piezoelectric element block according to the second embodiment shown in FIGS.
- FIG. 8 is a perspective view showing Embodiment 3 of an ink jet recording head.
- FIG. 9 is a cross-sectional view taken along the line CC of FIG.
- FIG. 10A is a perspective view showing a manufacturing method (manufacturing method 3) of the piezoelectric element block according to the third embodiment of FIGS. 8 and 9.
- FIG. 10B is a perspective view showing the method for manufacturing the piezoelectric element block according to the third embodiment shown in FIGS. 8 and 9.
- FIG. 11A is a perspective view illustrating a method of manufacturing the inkjet recording head of Embodiment 3 in FIGS. 8 and 9.
- FIG. 11B is a perspective view showing a method of manufacturing the ink jet recording head according to the third embodiment in FIGS. 8 and 9.
- FIG. 12 is a perspective view showing Embodiment 4 of an ink jet recording head.
- FIG. 13 is a cross-sectional view of a conventional ink jet recording head.
- FIG. 14 is a cross-sectional view taken along line DD of FIG.
- FIG. 1 is a sectional view showing Embodiment 1 of an inkjet recording head according to the present invention.
- FIG. 2 is a sectional view taken along line AA of FIG.
- the pressure chambers 2a, 2b, and 2c filled with the ink 1 are easily deformed into a plate-like substrate member having a plurality of recesses of the same shape formed in a line at regular intervals.
- a vibrating plate 3 (a vibrating plate having convex portions 3a, 3b, and 3c) is joined and formed.
- the pressure chamber 2a communicates with a nozzle 4a that discharges ink droplets toward a print medium, and also communicates with an ink pool 6 that supplies ink 1 through an ink supply port 5a. Communicating.
- the other pressure chambers 2b and 2c also communicate with the nozzles 4b and 4c, respectively, and supply the ink 1 through the ink supply ports 5b and 5c, respectively. It is connected to the ink pool 6 which is used.
- Piezoelectric elements 7a, 7b, 7c which are completely separated from each other are joined to the diaphragm 3 corresponding to the pressure chambers 2a, 2b, 2c.
- the piezoelectric element 7 a is a piezoelectric element of so-called laminated type has, as shown in FIG. 2, two external electrodes 8 a, 9 a plurality of connected alternately each a internal electrodes a, b .
- a voltage is applied to the external electrodes 8a and 9a, an electric field is applied to the active region 12a where the internal electrodes connected to the respective external electrodes alternately overlap each other with the piezoelectric ceramic layer c interposed therebetween. Distortion occurs.
- the internal electrodes a and b overlapping the piezoelectric ceramic layer c are connected to one of the external electrodes. Therefore, the voltage is applied to the external electrodes 8a and 9a. Even when the electric field is applied, no electric field is applied to the inactive regions 10a and 11a. Therefore, the inactive regions 10a and 11a have a structure in which no distortion occurs.
- the piezoelectric element 7a is joined to a portion of the diaphragm 3 fixed to the substrate member on the lower surface of the inactive regions 10a and 11a of the piezoelectric element 7a. Further, the piezoelectric element 7a is connected to a convex portion 3a corresponding to the pressure chamber 2a of the vibration plate 3 on the lower surface of the active region 12a of the piezoelectric element 7a.
- the other piezoelectric elements 7b and 7c have the same structure as the piezoelectric element 7a.
- the piezoelectric element is displaced in the laminating direction of the internal electrodes, and the generated displacement of the piezoelectric element is transmitted to the pressure chamber via the diaphragm 3. Since the ink in the pressure chamber is compressed, the ink droplet can be discharged from the nozzle.
- the piezoelectric elements 7a, 7b, and 7c are respectively provided on two lower surfaces of the inactive regions 10a and 10b on both sides of the active region 12a.
- the vibration plate 3 is joined to a portion fixed to the substrate member. Further, each of the piezoelectric elements 7a, 7b, 7c is completely separated. For this reason, the vibration generated is directly transmitted to the non-driven piezoelectric element due to the generated displacement of the driven piezoelectric element, and the non-driven piezoelectric element applies pressure to its own pressure chamber and vibrates in the direction of displacement. Can be avoided. Further, a force is applied to the substrate member in a direction of bending due to the displacement generated by the driving piezoelectric element, and the substrate member vibrates. The vibration in the bending direction causes the pressure chamber corresponding to the non-driven piezoelectric element to vibrate. Generates almost no pressure and no crosstalk.
- the first embodiment it is possible to prevent the occurrence of the so-called crosstalk in which the vibration due to the displacement of the driving piezoelectric element is transmitted to the non-driving pressure chamber. Therefore, the droplet speed and diameter of the ejected ink droplets are not changed by the number of simultaneously driven nozzles (that is, the number of piezoelectric elements), so that stable ink droplets can be ejected and print quality can be improved. And a good ink jet recording head is obtained.
- FIG. 3 is a sectional view showing Embodiment 2 of the inkjet recording head of the present invention.
- FIG. 4 is a sectional view taken along line BB of FIG.
- the second embodiment is different from the first embodiment in that notches are provided in the inactive regions on both sides of the active regions of the piezoelectric elements 13a, 13b, and 13c, respectively. .
- the piezoelectric element 13a has cut portions 17a and 18a in the inactive regions 14a and 15a on both sides of the active region 16a.
- the surface of the cut portions 17a and 18a on the active region 16a side is located at a predetermined distance from the active region 16a. Therefore, every other stacked electrode is exposed on the inner surfaces of the cut portions 17a and 18a.
- the piezoelectric element 13a has a non-laminated portion on the side opposite to the side joined to the diaphragm 3 having a thickness of 20% or more of the thickness in the laminating direction indicating a portion where the internal electrodes a and b are not laminated. d occupies. It is preferable that the cut depths of the cut portions 17a and 18a substantially leave the thickness of the non-laminated portion d. That is, it is preferable that the cut depth of the cut portions 17a and 18a be substantially equal to the thickness of the stacked portion where the internal electrodes a and b are stacked.
- the active regions 16a and 15a are formed by the inactive regions 14a and 15a. It is useless because the displacement of a is limited.
- the laminated portions corresponding to the cut portions 17a and 18a are omitted, the cost can be reduced as compared with a piezoelectric element in which the total laminated thickness is increased by adding the laminated portions.
- it is desirable that the corners of the cut portions 17a and 18a have curved surfaces with an appropriate curvature to avoid stress concentration.
- intermediate electrodes 19a and 20a are formed by plating or sputtering on almost the entire inner surfaces of the cut portions 17a and 18a, and a plurality of intermediate electrodes in the inactive regions 14a and 15a are respectively formed.
- the internal electrodes are connected to each other.
- External electrodes 21a and 22a are formed on both end surfaces of the piezoelectric element 13a by plating or sputtering in the same manner as the intermediate electrodes 19a and 20a.
- the internal electrodes of the active region 16a of the piezoelectric element 13a are alternately connected to the intermediate electrodes 19a and 20a, and the external electrodes are further connected via the internal electrodes of the inactive regions 14a and 15a. Connected to 21a and 22a.
- the piezoelectric element 13a passes through the internal electrodes 19a and 20a of the inactive regions 15a and 16a and the intermediate electrodes 19a and 20a. Active area of 1 6a
- a voltage is applied to the internal electrode, an electric field is applied in the active region 16a.
- no electric field is applied to the inactive regions 14a and 15a.
- the piezoelectric element 13a is fixed to the diaphragm 3 at the lower surface of the inactive areas 14a and 15a separated by the active area 16a and the cutouts 17a and 18a.
- the fixed part is a part fixed to the substrate member constituting the pressure chamber.
- the active region 16a of the piezoelectric element is connected to the convex portion 3a corresponding to the pressure chamber 2a of the diaphragm.
- the structure of the other piezoelectric elements 13b and 13c is the same as that of the piezoelectric element 13a.
- the second embodiment of the present invention not only the same effect as in the first embodiment described above can be obtained, but also a cut portion is provided in an inactive region near the active region of the piezoelectric element.
- the displacement generated by the active region is hardly constrained by the inactive region, and the electromechanical conversion efficiency (that is, the efficiency of pressure transmission to the ink in the pressure chamber) is improved. That is, the piezoelectric element is different from the conventional device in which the active region and the inactive regions on both sides of the active region are integrated. Therefore, the displacement generated from the active area is not restricted by each inactive area unlike the conventional device, and the efficiency of pressure transmission to the pressure chamber ink can be improved.
- FIG. 5 is an exploded perspective view showing a method of manufacturing the ink jet recording head shown in FIGS. 1 and 2.
- a first pressure chamber plate 23 having a space serving as a pressure chamber as a space is joined to the nozzle plate 4 in which the nozzles 4a, 4b, and 4c are formed.
- the ink supply ports 5a, 5b, and 5c and the ink supply port plate 5 in which the portions to be pressure chambers are arranged in a line at regular intervals are joined.
- a second pressure chamber plate 24 having a space serving as a pressure chamber is joined to the ink supply port plate 5.
- the diaphragm 3 (diaphragm module) having the projections 3a, 3b, and 3c formed thereon is joined to the second pressure chamber plate 24, and the two diaphragm modules 3 are further placed on the diaphragm module 3. Join the piezoelectric element block 7 on which the external electrodes 8 and 9 are formed. You.
- all the internal electrodes alternately overlap the piezoelectric ceramics at a predetermined width in the central portion between a pair of side surfaces, and every other internal electrode overlaps near the side surface with two layers of piezoelectric ceramics therebetween.
- An internal electrode and a piezoelectric ceramic layer are alternately stacked on top of each other, sintered and integrated, and two external electrodes 8 and 9 extending from both end surfaces to the upper surface are formed.
- the nozzle plate 4 is formed by pressing a stainless steel plate or the like to form the nozzles 4a, 4b, and 4c, or a nickel material having the nozzles 4a, 4b, and 4c by electric power.
- the nozzle plate 4 is formed.
- first pressure chamber plate 23, the ink supply port plate 5, and the second pressure chamber plate 24 are formed by pressing a stainless steel plate or the like or by using a photosensitive dry film as a photolithography means. It is formed by lithography.
- the diaphragm 3 has a shape in which the periphery of the projections 3a, 3b, and 3c to which the respective piezoelectric elements are joined is thinner than other portions.
- Diaphragm 3 is formed by nickel electrode or by half-etching a stainless steel plate or the like.
- the respective joinings can be made by thermal diffusion joining or joining using a bonding agent, and the joining of dry films can be joined by heat fusion.
- the bonding between the piezoelectric element block 7 and the diaphragm 3 is performed using an adhesive.
- the pressure chamber unit 25 including the nozzle plate 4, the first pressure chamber plate 23, the ink supply port plate 5, the second pressure chamber plate 24, and the diaphragm module 3, and the piezoelectric element block 7 and join.
- FIG. 6A is a perspective view of a state where these are joined.
- the piezoelectric element block 7 is cut from the state shown in FIG. 6A to a depth at which the diaphragm 3 is cut to a predetermined depth beyond the joint surface with the pressure chamber unit 25.
- the cutting position is determined so that the piezoelectric element is formed by accurately positioning each pressure chamber with reference to the outer shape of the pressure chamber unit 25.
- the piezoelectric element block 7 is cut in accordance with the determined cutting position, and the piezoelectric elements 7a, 7b, and 7c are separately formed as shown in FIG. 6B.
- the cutting of the piezoelectric element block 7 is performed by dicing Alternatively, it can be performed by a wire and a software.
- each piezoelectric element is aligned with and separated from each pressure chamber, so that the positioning accuracy of each pressure chamber and each piezoelectric element is adjusted. Is good. Therefore, an ink jet recording head with little variation in characteristics for each pressure chamber can be obtained.
- the manufacturing method 2 of the present invention is different from the above-described manufacturing method 1 in that a notch is formed in the piezoelectric element block 13 and then joined to the pressure chamber unit 25, but is basically the same as the manufacturing method 1. is there.
- FIG. 7A to 7C are views for explaining a method of manufacturing the piezoelectric element block 13 and show a method 2 of the present invention.
- FIG. 7A a piezoelectric element block 13 similar to the piezoelectric element block shown in the first embodiment is prepared.
- the piezoelectric element block 13 according to the second embodiment shown in FIGS. 3 and 4 in the upper part of FIG. 7A, 20% or more of the thickness in the laminating direction is occupied by the non-laminated part d where the internal electrode is not laminated. Formed.
- the internal electrodes are overlapped with every other electrode with two layers of piezoelectric ceramics therebetween.
- An inactive region in which piezoelectric ceramic layers are alternately stacked is provided, and cutouts 17 and 18 are provided in the inactive region using a dicing saw or a wire saw (FIG. 7B).
- the cut portions 17 and 18 are provided at a predetermined distance in the width direction of the active region, and are formed at a uniform depth over the entire length of the block.
- the cut depth is formed so as to substantially leave the thickness of the non-laminated portion d, that is, substantially equal to the thickness of the laminated portion (that is, the portion where the internal electrodes are laminated).
- the intermediate electrodes 19 and 20 are formed on the inner surfaces of the cutouts 17 and 18, and the external electrodes 21 and 22 are formed on both end surfaces of the piezoelectric element block 13 by plating or sputtering, respectively ( ( Figure 7C).
- the portions where the external electrodes and internal electrodes are not formed are masked with a resist or the like, and the masking member is formed after forming the electrodes. Peel off.
- a piezoelectric element block 13 as shown in FIG. 7C is manufactured, joined to the pressure chamber unit 25, and positioned and cut off and separated from each pressure chamber as in the manufacturing method 1.
- an ink jet having a good electromechanical conversion efficiency that is, a pressure transmission efficiency to the pressure chamber ink
- the recording head can be obtained, and the positioning of each pressure chamber and each piezoelectric element can be performed easily and accurately when the ink jet recording head is manufactured.
- FIG. 8 is a perspective view of an ink jet recording head according to the third embodiment of the present invention.
- FIG. 9 is a cross-sectional view taken along line CC of FIG.
- the piezoelectric elements 26a, 26b, and 26c are arranged in the row direction of the pressure chamber (that is, in FIG. 8, the direction of the piezoelectric elements 26a ⁇ 26b ⁇ 26c (that is, 3 and 4 in that it is a single-layer piezoelectric element in which a pair of external electrodes facing each other are formed.
- the piezoelectric element 26a of the present embodiment is a single-layer piezoelectric element, and a non-piezoelectric material part 27 which does not deform even when an electric field is applied thereto is provided on both sides of the piezoelectric material part 28 as shown in FIG. Connected.
- the piezoelectric material part 28 becomes an active area
- the non-piezoelectric material part becomes an inactive area.
- the cut depths of the cut portions 17 and 18 are determined based on a balance between the limitation of the displacement of the active region by the inactive region and the reduced rigidity of the cut portion. Further, it is desirable that the corners of the cut portions 17 and 18 have a curved surface with an appropriate curvature in order to avoid stress concentration, as in the second embodiment.
- the piezoelectric element 26 a has external electrodes 29 a and 3 respectively covering a pair of surfaces facing each other in the column direction of the pressure chambers so as to cover at least the whole or a part of the piezoelectric material part 28. 0 a force formed by plating or sputtering.
- Pad portions 31a and 32a for connecting the external electrodes 29a and 30a to a drive circuit (not shown) are formed on the upper surface of the piezoelectric element 26a.
- the piezoelectric element 26a is fixed to the diaphragm 3 on the lower surface of the inactive area separated by the active area and the cutouts 17 and 18, as in the second embodiment shown in FIGS.
- the fixed portion is a portion fixed to the substrate member constituting the pressure chamber, while the active region 16 a of the piezoelectric element is a convex portion 3 a corresponding to the pressure chamber 2 a of the diaphragm. Is connected to
- the structure of the other piezoelectric elements 26b and 26c is the same as that of the piezoelectric element 26a.
- the third embodiment of the present invention since no crosstalk occurs, print quality is improved. Further, the electromechanical conversion efficiency is improved, and the cost of the inkjet recording head can be reduced because expensive multilayered piezoelectric elements are not used.
- FIGS. 10A and 10B are perspective views showing a method for manufacturing the piezoelectric element block according to the third embodiment.
- FIGS. 11A and 11B are perspective views showing a method of manufacturing an inkjet recording head according to the third embodiment.
- a piezoelectric element block 26 formed by joining a non-piezoelectric material part 27 to a pair of side surfaces of a piezoelectric material part 28 is prepared.
- Cut portions 17 and 18 are provided in the inactive region made of the material portion 27 using a dicing saw or a wire saw.
- the cuts 17 and 18 are provided at a predetermined distance from the active region, and the cuts 17 and 18 are formed at a uniform depth over the entire length of the block.
- a photosensitive resin layer 33 for forming a mask pattern when forming external electrodes is formed on the entire upper surface and side surfaces of the piezoelectric element block 26 and the entire inner surfaces of the cutouts 17 and 18. ( Figure 10B).
- the piezoelectric element block 26 having the photosensitive resin layer 33 formed thereon is joined to the pressure chamber unit 25.
- the photosensitive resin layer 33 is exposed to light by aligning it with the pressure chamber so that the pad portion 36 of the external electrode is removed, and the unexposed portion is removed (FIG. 1). 1 A).
- the manufacturing method 3 of the present invention since a single-layer piezoelectric element having a pair of counter electrodes is joined to each pressure chamber in the direction of the row of pressure chambers, it is possible to arrange the pressure chambers with high density. Will be possible. Further, not only is the electromechanical conversion efficiency improved, but also a low-cost ink jet recording head can be easily manufactured because an expensive laminated piezoelectric element is not used.
- FIG. 12 is a perspective view showing Embodiment 4 of the ink jet recording head of the present invention.
- the piezoelectric elements 34a, 34b, and 34c are formed with a pair of external electrodes facing each other in the row direction of the pressure chambers. Although it is a single-layer piezoelectric element, it differs in that it has no cutout.
- the piezoelectric element 34a of the present embodiment is a single-layer piezoelectric element as described above, similarly to the third embodiment, the non-piezoelectric material portion which does not deform even when an electric field is applied to both sides of the piezoelectric material portion Therefore, the piezoelectric material portion becomes an active region and the non-piezoelectric material portion becomes an inactive region.
- a manufacturing method 4 of the present invention which is a manufacturing method of the recording head according to the fourth embodiment shown in FIG.
- This manufacturing method 4 is similar to manufacturing method 3 in that a pair of side surfaces of the piezoelectric material A piezoelectric element block formed by joining non-piezoelectric materials is prepared.
- a photosensitive resin layer 33 for forming a pattern serving as a mask when forming an external electrode is formed on the entire upper surface and side surfaces of the piezoelectric element block having no cutout portion. . Then, the piezoelectric element block having the photosensitive resin layer 33 formed thereon is joined to the pressure chamber unit 25.
- the photosensitive resin layer 33 is exposed to light by positioning it in the pressure chamber so as to remove the portion where the pad portion of the external electrode is formed after the block is cut, and the unexposed portion is removed.
- each of the pressure chambers is positioned and cut and separated by a dicing saw or the like in the same manner as in the first, second and third manufacturing methods.
- the step of forming the cut portion in the piezoelectric element block and the step of forming the photosensitive resin layer in the cut portion are unnecessary, so that the ink jet recording head can be easily manufactured at low cost. Can be manufactured.
- the piezoelectric element has an active region in which a strain is generated internally when a voltage is applied between the external electrodes, and a strain in the piezoelectric element even when a voltage is applied between the external electrodes. It has an inactive area that does not generate, and is joined to the corresponding pressure chamber via the active area and the vibration wall, and is joined to the corresponding pressure chamber via the inactive area.
- a cut portion is provided in an inactive region between a portion joined to the vibration wall of the piezoelectric element and a portion joined to the pressure chamber.
- the displacement that occurs is not constrained by the inactive region, and therefore the pressure transmission efficiency to the ink in the pressure chamber is improved.
- each piezoelectric element is positioned and separated from each pressure chamber, so that the positioning of each pressure chamber and each piezoelectric element is performed. Accuracy is improved, and as a result, it is possible to obtain a recording head with less variation in characteristics of each pressure chamber. Further, it is possible to obtain a recording head capable of increasing the density, reducing the size, increasing the number of nozzles, increasing the speed, reducing the power consumption, and reducing the cost.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99923867A EP1083048A4 (en) | 1998-06-02 | 1999-06-02 | INK JET WRITING HEAD AND MANUFACTURING METHOD THEREOF |
AU40586/99A AU4058699A (en) | 1998-06-02 | 1999-06-02 | Ink jet recording head and manufacturing method thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10/153380 | 1998-06-02 | ||
JP15338098A JP3248486B2 (ja) | 1998-06-02 | 1998-06-02 | インクジェット記録ヘッド及びその製造方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999062712A1 true WO1999062712A1 (fr) | 1999-12-09 |
Family
ID=15561211
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/002945 WO1999062712A1 (fr) | 1998-06-02 | 1999-06-02 | Tete d'ecriture a jet d'encre et procede de fabrication associe |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1083048A4 (ja) |
JP (1) | JP3248486B2 (ja) |
AU (1) | AU4058699A (ja) |
WO (1) | WO1999062712A1 (ja) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002248765A (ja) | 2000-12-19 | 2002-09-03 | Fuji Xerox Co Ltd | インクジェット式記録ヘッドおよびインクジェット式記録装置 |
US20020196314A1 (en) * | 2001-06-25 | 2002-12-26 | Xerox Corporation | Piezoelectric transducer |
EP1275507B8 (en) * | 2001-07-09 | 2005-06-15 | Ricoh Company, Ltd. | Liquid drop jet head and ink jet recording apparatus |
JP4622362B2 (ja) * | 2004-07-26 | 2011-02-02 | ブラザー工業株式会社 | インクジェットヘッド |
JP2006096034A (ja) * | 2004-08-31 | 2006-04-13 | Brother Ind Ltd | 溝付き振動板及び圧電層を有する圧電アクチュエータ、液体移送装置及びその製造方法 |
US7731340B2 (en) | 2005-08-31 | 2010-06-08 | Brother Kogyo Kabushiki Kaisha | Liquid jetting head and method for producing the same |
KR100738102B1 (ko) | 2006-02-01 | 2007-07-12 | 삼성전자주식회사 | 압전 방식의 잉크젯 프린트헤드 |
JP5151844B2 (ja) | 2008-09-16 | 2013-02-27 | 株式会社リコー | 液滴噴射ヘッド、液滴吐出装置、画像形成装置 |
KR101063450B1 (ko) * | 2009-01-21 | 2011-09-08 | 삼성전기주식회사 | 잉크젯 헤드 제조방법 |
KR20100104730A (ko) * | 2009-03-19 | 2010-09-29 | 삼성전기주식회사 | 잉크젯 헤드 제조방법 |
KR20220137308A (ko) | 2021-04-02 | 2022-10-12 | 주식회사 이엠텍 | 미세입자 발생장치용 히터 및 그 설치구조 |
KR102498977B1 (ko) | 2020-12-01 | 2023-02-15 | 주식회사 이엠텍 | 미세입자 발생장치용 히터 및 그 설치구조 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0524189A (ja) * | 1991-07-22 | 1993-02-02 | Seiko Epson Corp | インクジエツトヘツド |
JPH07314672A (ja) * | 1994-05-25 | 1995-12-05 | Seiko Epson Corp | インクジェット記録ヘッド |
JPH08127124A (ja) * | 1994-11-02 | 1996-05-21 | Mita Ind Co Ltd | インクジェット記録ヘッド |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69427837T2 (de) * | 1993-10-14 | 2002-04-04 | Citizen Watch Co Ltd | Tintenstrahlkopf und Verfahren zu seiner Herstellung und zu seiner Steuerung |
JP2842320B2 (ja) * | 1995-08-22 | 1999-01-06 | 日本電気株式会社 | 液滴噴射装置および液滴噴射方法 |
JPH09174836A (ja) * | 1995-12-22 | 1997-07-08 | Nec Corp | インクジェット記録ヘッド及びその製造方法 |
-
1998
- 1998-06-02 JP JP15338098A patent/JP3248486B2/ja not_active Expired - Fee Related
-
1999
- 1999-06-02 AU AU40586/99A patent/AU4058699A/en not_active Abandoned
- 1999-06-02 EP EP99923867A patent/EP1083048A4/en not_active Withdrawn
- 1999-06-02 WO PCT/JP1999/002945 patent/WO1999062712A1/ja not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0524189A (ja) * | 1991-07-22 | 1993-02-02 | Seiko Epson Corp | インクジエツトヘツド |
JPH07314672A (ja) * | 1994-05-25 | 1995-12-05 | Seiko Epson Corp | インクジェット記録ヘッド |
JPH08127124A (ja) * | 1994-11-02 | 1996-05-21 | Mita Ind Co Ltd | インクジェット記録ヘッド |
Non-Patent Citations (1)
Title |
---|
See also references of EP1083048A4 * |
Also Published As
Publication number | Publication date |
---|---|
AU4058699A (en) | 1999-12-20 |
JPH11348276A (ja) | 1999-12-21 |
EP1083048A1 (en) | 2001-03-14 |
JP3248486B2 (ja) | 2002-01-21 |
EP1083048A4 (en) | 2001-09-19 |
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