WO2016047178A1 - インクジェットヘッド及びインクジェットヘッドの製造方法 - Google Patents
インクジェットヘッド及びインクジェットヘッドの製造方法 Download PDFInfo
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- WO2016047178A1 WO2016047178A1 PCT/JP2015/060020 JP2015060020W WO2016047178A1 WO 2016047178 A1 WO2016047178 A1 WO 2016047178A1 JP 2015060020 W JP2015060020 W JP 2015060020W WO 2016047178 A1 WO2016047178 A1 WO 2016047178A1
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- electrode portion
- piezoelectric element
- electrically connected
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- connection member
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Images
Classifications
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- 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
- B41J2/14233—Structure of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
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- 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
- B41J2/161—Production of print heads with piezoelectric elements of film type, deformed by bending and disposed on a diaphragm
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- 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
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- B41J2/1621—Manufacturing processes
- B41J2/1623—Manufacturing processes bonding and adhesion
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Definitions
- the present invention relates to an inkjet head and an inkjet head manufacturing method, and more particularly, by making the contact surface height uniform by a simple method in electrical connection between an electrode on a head chip and a wiring on a wiring board.
- the present invention relates to an ink jet head capable of performing reliable electrical connection and a method for manufacturing the ink jet head.
- an image formed by ejecting ink from an inkjet head has been required to have high accuracy and high quality.
- a line head formed by arranging a plurality of recording heads across the width direction of the recording medium is used to form an image by conveying the recording medium to the recording area of the line head, nozzles provided in the line head If ejection failure occurs, streaks and unevenness occur, and the image deteriorates. Therefore, in order to prevent image degradation and provide a high-accuracy and high-quality image, it is necessary to prevent ejection failure of each nozzle provided in the inkjet head.
- Various techniques are known as techniques for preventing nozzle discharge defects.
- an inkjet head that discharges ink by pressurizing ink in a pressure chamber communicating with a nozzle by driving a piezoelectric element, it is necessary to reliably supply power to each piezoelectric element in order to drive the piezoelectric element reliably.
- a first electrode portion (individual electrode) to which a driving potential is formed so as to sandwich the piezoelectric element and a second electrode portion (common electrode) to which a GND potential is input are disposed above the piezoelectric element. It is important to ensure electrical connection with each wiring of the laminated wiring board.
- the head element including the piezoelectric element and the wiring substrate including the wiring are surrounded by the piezoelectric element.
- the first electrode portion is electrically drawn from the second electrode portion formed on the piezoelectric element. It is also known that bumps are formed on the lead-out portion and are electrically connected by contacting the wiring of the wiring board (Patent Document 2).
- Patent Document 2 in order to reliably electrically connect the first electrode portion and the second electrode portion formed on the piezoelectric element to the wiring of the wiring board, the position where the first electrode portion and the wiring are in contact with each other and the second It is disclosed that by making the position where the electrode portion and the wiring contact each other at the same height, the connection state of each electrical connection portion is made uniform, and partial contact failure can be prevented.
- Patent Document 1 and Patent Document 2 have a configuration in which bumps are raised on the first electrode portion formed on the piezoelectric element, in order to ensure electrical connection when bonding the wiring boards together. If pressure is applied with a strong pressure, the pressure may be concentrated on the bumps on the surface of the first electrode portion and the piezoelectric element may be damaged. For this reason, there exists a problem that highly accurate pressure control is requested
- the bumps provided on the first electrode part and the bumps provided on the second electrode part are different in size and height, so that the amount of deformation during crimping may differ. There is. However, it is difficult to control the pressure in consideration of the amount of deformation and make the height of each contact surface uniform.
- An object is to provide an inkjet head and a method of manufacturing the inkjet head.
- a pressure chamber that accommodates ink ejected from the nozzles, a piezoelectric element that is provided corresponding to the pressure chamber, the first electrode portion is formed on the upper surface, and the second electrode portion is formed on the lower surface;
- a head chip having a lead-out portion electrically drawn out of the piezoelectric element from the second electrode portion;
- a first connection member comprising a stud bump disposed above the head chip and electrically connected to the first electrode part of the head chip; and electrically connected to the second electrode part via the lead-out part
- a wiring board having a second connection member made of stud bumps to be connected;
- the lead portion is provided with an adjustment member that has an upper surface disposed at a height substantially equal to the height of the first electrode portion and at least the upper surface is electrically connected to the lead portion,
- the first connection member of the wiring board is electrically connected to the first electrode part by contacting an upper surface of the first electrode part, and the second connection member is formed of the adjustment member.
- the piezoelectric element used for the adjustment member has a hole penetrating in the height direction or a groove cut out in the height direction, 5.
- the inkjet head according to 4 wherein the hole or the groove is filled with a conductive material, whereby the third electrode portion and the lead-out portion are electrically connected via the conductive material.
- a plurality of the second connection members are provided, and some of the second connection members of the plurality of second connection members are in contact with only the conductive material filled in the holes or the grooves. 5.
- a plurality of the pressure chambers are provided, and each of the second electrode portions formed in the plurality of piezoelectric elements provided corresponding to the pressure chambers is common to the plurality of second electrode portions.
- a conductive material is applied to each of the first connection member and the second connection member, and is electrically connected to the upper surface of the first electrode portion and the upper surface of the adjustment member via the conductive material. 10.
- the inkjet head according to any one of 1 to 9 above.
- a pressure chamber that accommodates ink ejected from the nozzles, a piezoelectric element that is provided corresponding to the pressure chamber, the first electrode portion is formed on the upper surface, and the second electrode portion is formed on the lower surface;
- a head chip having a lead-out portion electrically drawn out of the piezoelectric element from the second electrode portion;
- a first connection member disposed above the head chip and electrically connected to the first electrode portion of the head chip; and a first connection member electrically connected to the second electrode portion via the lead-out portion.
- a wiring board having two connection members In a method for manufacturing an inkjet head comprising: Forming a piezoelectric element having the first electrode portion and the second electrode portion corresponding to the pressure chamber on the head chip; and A lead portion forming step for forming the lead portion on the head chip; An adjustment member forming step of forming an adjustment member on the lead portion, the upper face being disposed at a height substantially equal to the height of the first electrode portion, and the upper face being electrically connected to the lead portion; By bringing the first connection member into contact with the upper surface of the first electrode portion, and electrically connecting with the first electrode portion, and contacting the second connection member with the upper surface of the adjustment member, A bonding step of bonding the wiring substrate and the head chip so as to be electrically connected to the second electrode portion via the adjustment member; A method for manufacturing an ink-jet head comprising:
- the adjustment member is formed by a piezoelectric element having a third electrode portion that is electrically connected to the lead-out portion on the top surface, 12.
- the first connection member and the second connection member are formed on the wiring board so as to have a convex shape in a direction in which the head chip is disposed, and the head chip is disposed at a tip position.
- Sectional drawing which shows an example of the inkjet head which concerns on this invention
- Plan view of head chip of inkjet head Partial enlarged sectional view of an inkjet head
- (A)-(c) is sectional drawing which shows the other aspect of the connection structure of the 2nd connection member of a wiring board, and an adjustment member.
- (A)-(c) is a figure explaining the manufacturing process of the inkjet head based on this invention.
- (A)-(c) is a figure explaining the manufacturing process of the inkjet head based on this invention.
- (A) And (b) is a figure explaining the manufacturing method of the inkjet head based on this invention.
- the figure explaining the manufacturing method of the inkjet head which concerns on this invention Partial plan view showing another aspect of the adjustment member
- FIG. 1 is a cross-sectional view showing an example of an ink jet head according to the present invention
- FIG. 2 is a plan view of a head chip of the ink jet head
- FIG. 3 is a partial enlarged cross sectional view of the ink jet head.
- a head chip 10 and a wiring substrate 20 are laminated and integrated via a spacer substrate 30 therebetween.
- a box-shaped manifold 40 having an ink storage chamber 41 inside is provided on the upper surface of the wiring board 20.
- the Z direction indicated by an arrow in FIGS. 1 and 3 is set to “down” with reference to the state of the inkjet head 1 in FIGS.
- the opposite direction is “up”. Therefore, “upward” is a direction opposite to the Z direction in the inkjet head 1, and “downward” is a direction along the Z direction.
- the “upper surface” is a surface disposed in the direction opposite to the Z direction in the inkjet head 1, and the “lower surface” is a surface disposed in the Z direction.
- the head chip 10 includes a nozzle plate 11, an intermediate plate 12, a pressure chamber plate 13, and a diaphragm layer 14 that are stacked in order from the bottom in FIG. 3.
- the pressure chamber plate 13 is formed of, for example, a Si (silicon) substrate.
- the pressure chamber plate 13 is formed with a pressure chamber 131 that accommodates ink ejected from the nozzles 111 formed on the nozzle plate 11.
- the number of pressure chambers 131 is not particularly limited, and at least one pressure chamber 131 is sufficient.
- the inkjet head 1 having a plurality of pressure chambers 131 is illustrated.
- the plurality of pressure chambers 131 are arranged in the XY direction (see FIG. 2) of the head chip 10 when the head chip 10 is viewed in plan.
- the pressure chamber 131 is formed so as to penetrate the pressure chamber plate 13. Therefore, the upper wall of the pressure chamber 131 is formed by the diaphragm layer 14, and the lower wall is formed by the intermediate plate 12.
- the diaphragm layer 14 is formed of, for example, a SiO 2 film (silicon oxide film).
- the diaphragm layer 14 is provided with an ink inlet 132 that opens to the upper surface of the head chip 10, corresponding to the pressure chamber 131.
- the intermediate plate 12 is formed of, for example, a glass substrate.
- a plurality of communication passages 121 communicating with the inside of the pressure chamber 131 are formed in the intermediate plate 12 corresponding to the pressure chamber 131.
- the nozzle plate 11 is formed of, for example, a Si substrate.
- a plurality of nozzles 111 are formed so as to open to the lower surface of the nozzle plate 11 corresponding to the communication paths 121 of the intermediate plate 12. Therefore, the inkjet head 1 shown in this embodiment discharges ink downward from the nozzle 111.
- a piezoelectric element 15 is provided on the upper surface of the head chip 10.
- the piezoelectric element 15 is disposed on the upper surface of the diaphragm layer 14 constituting the upper wall of the pressure chamber 131 corresponding to each pressure chamber 131.
- the piezoelectric element 15 shown in this embodiment is formed with a predetermined thickness by a thin film PZT. Since the thin film PZT can be etched using photolithography technology, a plurality of piezoelectric elements 15 arranged in a predetermined pattern can be easily formed.
- the piezoelectric element 15 is formed with a first electrode portion 151 and a second electrode portion 152, respectively.
- the first electrode portion 151 is an individual electrode provided for each piezoelectric element 15 and is formed on the upper surface of the piezoelectric element 15.
- the second electrode portion 152 is a GND common electrode provided in common to the plurality of piezoelectric elements 15, and is formed on the lower surface of the piezoelectric element 15.
- the second electrode portion 152 is formed on the upper surface of the diaphragm layer 14, and the piezoelectric element 15 is placed on the upper surface of the second electrode portion 152.
- the upper surface of the first electrode portion 151 is arranged at a predetermined height H1 (see FIG. 3).
- the height H1 at which the upper surface of the first electrode portion 151 is disposed is a height from the upper surface to the upper surface of the first electrode portion 151 on the basis of the upper surface of the diaphragm layer 14 directly below the piezoelectric element 15. And define. Bumps are not provided on the upper surface of the first electrode portion 151.
- the second electrode portion 152 is formed so as to largely protrude outside the formation region of the piezoelectric element 15. Specifically, the second electrode portion 152 is formed with the piezoelectric element 15 formation region toward an end portion arranged in the Y direction of the head chip 10 shown in FIG. 2 and an end portion arranged in the opposite direction. It is formed so as to protrude outside. As a result, an extraction portion 153 made of the same electrode film as the second electrode portion 152 is formed on the upper surface of the diaphragm layer 14 (see FIG. 3). That is, the second electrode portion 152 is electrically drawn out of the formation region of the piezoelectric element 15 by the lead-out portion 153 on the upper surface of the diaphragm layer 14.
- the second electrode portion 152 is electrically drawn out to a drawing portion 153 common to the plurality of piezoelectric elements 15.
- the adjustment member 16 is provided on the upper surface of the drawer portion 153.
- the adjustment member 16 is a member that adjusts the height of an electrical connection portion for achieving electrical connection between the lead portion 153 and a connection member of the wiring board 20 described later.
- the adjusting member 16 shown in the present embodiment is formed on the upper surface of the drawing portion 153 drawn near both ends of the head chip 10 so as to extend along the X direction shown in FIG.
- the adjustment member 16 may be formed by a single member on the upper surface of the drawer portion 153, or may be formed by laminating a plurality of layers on the upper surface of the drawer portion 153. .
- Each adjustment member 16 near both ends of the head chip 10 is divided into two in the X direction. Thereby, the deformation
- the adjusting member 16 is preferably formed using a material having a Poisson's ratio of 0.4 or less.
- the Poisson's ratio of the piezoelectric element 15 is generally about 0.3, and the Poisson's ratio of a gold bump generally used as a first connection member 25 and a second connection member 26 of the wiring board 20 described later is about 0.44. Therefore, the first connecting member 25 and the second connecting member 26 that are electrically connected to the piezoelectric element 15 and the adjusting member 16 can be easily crushed. Thereby, the reliability of electrical connection can be improved and the load on the piezoelectric element 15 can be reduced.
- the Poisson's ratio of the material used for the adjustment member 16 is more preferably defined in relation to the piezoelectric element 15. That is, the adjustment member 16 is more preferably made of a material having a Poisson's ratio comparable to that of the piezoelectric element 15.
- the adjustment member 16 is more preferably made of a material having a Poisson's ratio comparable to that of the piezoelectric element 15.
- the adjustment member 16 shown in the present embodiment exemplifies a preferable aspect formed using a piezoelectric element made of the same material as the piezoelectric element 15 provided for each pressure chamber 131, that is, a thin film PZT.
- a piezoelectric element made of the same material as the piezoelectric element 15 provided for each pressure chamber 131, that is, a thin film PZT.
- the adjusting member 16 shown in the present embodiment is formed by providing the third electrode portion 161 on the upper surface of the piezoelectric element.
- the third electrode portion 161 can be formed in the same process when the first electrode portion 151 is formed on the upper surface of the piezoelectric element 15.
- the piezoelectric element 15 and the adjustment member 16 are patterned in the same process including the first electrode portion 151 and the third electrode portion 161.
- the first electrode portion 151 is provided on the upper surface of the piezoelectric element 15, and the adjustment member 16 also has the third electrode portion 161 on the upper surface. These electrode portions 151 and 161 are connected to the piezoelectric element below the first electrode portion 151. Since it is formed in a thin film shape that is sufficiently thin as compared with the above, the piezoelectric when the first connection member 25 and the second connection member 26 of the wiring board 20 are electrically connected to the first electrode portion 151 and the third electrode portion 161. In the hardness (Poisson's ratio) of the element 15 and the adjustment member 16, the presence of these electrode portions 151 and 161 can be ignored.
- the upper surface of the adjusting member 16 is arranged to be substantially equal to the height H1 of the upper surface of the first electrode portion 151. If both patterns are formed in the same process, it is easy to form them so that the heights of the upper surfaces of the both are arranged at substantially the same height. Therefore, the height of the upper surface of the first electrode portion 151 and the upper surface of the third electrode portion 161 on the head chip 10 electrically connected to the wiring of the wiring board 20 can be made uniform by a simple method.
- the height of the upper surface of the adjustment member 16 is based on the height of the upper surface of the diaphragm layer 14 directly below the piezoelectric element 15 from the height of the upper surface of the third electrode portion 161 of the adjustment member 16. It is defined as the height to the top surface. Bumps are not provided on the upper surface of the third electrode portion 161.
- the height of the upper surface of the adjustment member 16 is “substantially equal” to the height H1 of the upper surface of the first electrode portion 151, meaning that there is a variation in height between them so that the problem of the present invention can be solved. I say that you may have.
- a value obtained by subtracting the value of the height of the upper surface of the adjustment member 16 from the value of the height H1 of the upper surface of the first electrode portion 151 is a value ⁇ 3 of the height H1 of the upper surface of the first electrode portion 151. %.
- the height of the upper surface of the adjustment member 16 is preferably equal to the height H1 of the upper surface of the first electrode portion 151.
- the heights of the upper surfaces of the first electrode portion 151 and the adjustment member 16 are average values.
- the upper surface of the adjustment member 16 has a sufficiently large area.
- the third electrode portion 161 on the upper surface of the adjustment member 16 has an area equal to or larger than the area of the first electrode portion 151 on the upper surface of one piezoelectric element 15. This facilitates positioning in the X and Y directions when electrical connection with a connection member of the wiring board 20 described later is performed, and the joining work of the wiring board 20 can be performed easily.
- the adjustment member 16 is formed with a through-hole 162 that vertically penetrates the adjustment member 16. Thereby, the drawer
- FIG. The through hole 162 is filled with a sufficient amount of the conductive material 163.
- the conductive material 163 is preferably a conductive material that is in a paste state when filled and is cured by heating after filling, and more preferably a conductive adhesive.
- the third electrode portion 161 and the lead portion 153 are electrically connected via the conductive material 163. Since the lead portion 153 is electrically connected to the second electrode portion 152 on the lower surface of the piezoelectric element 15, the third electrode portion 161 is electrically connected to the second electrode portion 152 via the lead portion 153.
- the conductive material 163 filled in the through hole 162 is cured after the wiring substrate 20 is joined.
- the wiring substrate 20 has a substrate body 21 made of, for example, a Si substrate, and first wiring for individually electrically connecting to the first electrode portions 151 of the plurality of piezoelectric elements 15 on the lower surface of the substrate body 21. 22 and a second wiring 23 for commonly connecting to the second electrode portions 152 of the plurality of piezoelectric elements 15.
- the first wiring 22 is drawn out to the upper surface of the substrate body 21 through the through wiring portion 221 that penetrates the substrate body 21 and is electrically connected to the first upper wiring portion 222.
- the second wiring 23 is drawn out to the upper surface of the substrate body 21 through the through wiring portion 231 that penetrates the substrate body 21 and is electrically connected to the second upper wiring portion 232.
- the first upper wiring part 222 and the second upper wiring part 232 are electrically connected to the FPC 50 shown in FIG.
- reference numeral 24 is provided on the upper surface and the lower surface of the substrate body 21, and protects the first wiring 22, the second wiring 23, the first upper wiring portion 222, and the second upper wiring portion 232.
- it is a protective layer made of SiO 2 or polyimide.
- the first connection member 25 and the second connection member 26 are provided on the lower surface of the wiring board 20.
- the first connection member 25 is an electrical connection member connected to the first electrode portion 151 on the head chip 10, and the second connection member 26 connects the third electrode portion 161 and the extraction portion 153 on the head chip 10. It is an electrical connection member that is connected to the second electrode portion 152 via the first electrode portion 152.
- the protective film 24 where the first connection member 25 and the second connection member 26 are provided is removed, and the first wiring 22 and the second wiring 23 are exposed on the lower surface of the wiring board 20.
- the first connecting member 25 is electrically connected to the first wiring 22, and the second connecting member 26 is electrically connected to the second wiring 23.
- the first connection member 25 and the second connection member 26 are formed in a convex shape in the Z direction, which is the direction in which the head chip 10 is disposed, from the lower surface of the wiring board 20. Further, the position of the tip of the first connection member 25 and the position of the tip of the second connection member 26 have a height H2 (see FIG. 3) substantially equal to the Z direction, which is the direction in which the head chip 10 is disposed. Has been placed. For this reason, electrical connection with the 1st electrode part 151 and the 3rd electrode part 161 on head chip 10 can be performed more easily.
- the height of the position of the tip of each of the first connection member 25 and the second connection member 26 is determined from the contact surface with respect to the contact surface between the first connection member 25 and the lower surface of the first wiring 22. It is defined as the height to the position of the tip of each of the first connecting member 25 and the second connecting member 26.
- the position of the tip end of the first connecting member 25 and the position of the tip end of the second connecting member 26 are “substantially equal”, and there is a variation in height between them so that the problem of the present invention can be solved. I say that you may have.
- the value obtained by subtracting the height of the tip position of the second connection member 26 from the height of the tip position of the first connection member 25 is ⁇ the height of the position of the tip end of the first connection member 25. It means within 10%.
- tip of the 1st connection member 25 and the 2nd connection member 26 is equal.
- the heights of the positions of the tips of the first connection member 25 and the second connection member 26 are average values of the respective values.
- the first connection member 25 and the second connection member 26 are formed of a conductive member.
- the conductive member is preferably a bump, more preferably a stud bump.
- the stud bump is formed by, for example, joining a metal ball formed by discharging and melting the tip of a fine metal wire such as Au to the surface of the first wiring 22 and the second wiring 23 by heat and ultrasonic waves, and the fine metal wire is torn off from the metal ball. As a result, a predetermined protruding height is formed. Accordingly, the stud bump has a plate-like or hump-like shoulder portion derived from a metal ball located at the base, and has a step-like conical shape on the side surface.
- the front end portion side of the stud bump has a protruding portion formed by a part of a thin metal wire protruding from the shoulder portion. Since the protruding portion can be easily plastically deformed, there is no possibility that the piezoelectric element is damaged. Stud bumps can be easily formed with various shoulder heights by changing the size of the metal ball. However, depending on the size of the stud bumps, the size of the tips and shoulders can be reduced. Since they are different, the degree of plastic deformation is different. Therefore, the size of the first connection member and that of the second connection member are the same from the viewpoint of making the electrical connection more reliably by making the plastic deformation of the first connection member and the second connection member at the same level when making the electrical connection. It is preferable to set the degree. Note that the position of the tip of the stud bump is the position of the tip of the protrusion formed by a thin metal wire torn from the metal ball.
- conductive materials 251 and 261 are preferably applied to the first connecting member 25 and the second connecting portion 26, respectively. Thereby, even if there is a slight error in the height between the first connection member 25 and the second connection part 26, the error can be absorbed, and the first connection member 25, the first electrode part 151, and the second connection can be absorbed. The electrical connection between the portion 26 and the third electrode portion 161 can be further ensured. Moreover, it is not necessary to apply an excessive pressure during the electrical connection.
- the conductive materials 251 and 261 are preferably conductive materials that are pasty when applied and are cured by heating after application, and more preferably conductive adhesives.
- the conductive adhesive By using the conductive adhesive, the first connection member 25 and the first electrode portion 151 and the second connection portion 26 and the third electrode portion 161 can be bonded simultaneously. For this reason, the manufacturing process of the inkjet head 1 including the connection of the head chip 10 and the wiring board 20 can be simplified.
- reference numeral 27 denotes an ink flow path for supplying ink in the ink storage chamber 41 (see FIG. 1) to the pressure chambers 131 of the head chip 10 through the wiring board 20.
- the spacer substrate 30 maintains a predetermined distance between the head chip 10 and the wiring substrate 20, and a connection region between the piezoelectric element 15, the first connection member 25, the adjustment member 16, and the second connection member 26 is provided therebetween. Secure. In order to secure this connection region, the spacer substrate 30 includes an opening 31 formed according to the position of the piezoelectric element 15 on the head chip 10 and an opening formed according to the position of the adjustment member 16. Part 32.
- the openings 31 and 32 penetrate the spacer substrate 30 as shown in FIG.
- the piezoelectric element 15 of the head chip 10 and the first connection member 25 of the wiring board 20 are accommodated in the opening 31, and the adjustment member 16 of the head chip 10 and the second connection member 26 of the wiring board 20 are accommodated in the opening 32. Has been.
- each piezoelectric element 15 arranged in the X direction is arranged in four rows in the Y direction.
- One opening 31 is formed in a size including eight piezoelectric elements 15 arranged in the X direction. Accordingly, four openings 31 are arranged in the Y direction.
- the openings 32 are each formed in a size that includes two adjustment members 16 near each end of the head chip 10.
- the spacer substrate 30 is formed with a through-hole 33 that communicates the ink inlet 132 that opens to the upper surface of the head chip 10 and the ink flow path 27 formed in the wiring substrate 20.
- the material of the spacer substrate 30 is not particularly limited. Here, an alloy made of 42 alloy (42Ni) is used.
- the spacer substrate 30 is subjected to an appropriate surface treatment such as an insulation treatment or a rust prevention treatment.
- reference numeral 34 denotes an air escape groove for letting the air in the openings 31 and 32 escape to the outside when the head chip 10 and the wiring board 20 are joined with the spacer member 30 interposed therebetween.
- Reference numeral 35 denotes an adsorption groove for adsorbing the spacer substrate 30 when it is moved by a moving device (not shown).
- the air escape groove 34 and the suction groove 35 are formed from the upper surface of the spacer substrate 30 to a depth that does not penetrate the spacer substrate 30.
- the head chip 10 and the wiring substrate 20 are joined with the spacer substrate 30 interposed therebetween.
- the first connection member 25 of the wiring board 20 contacts and is electrically connected to the first electrode part 151 of the piezoelectric element 15 and at the same time, the wiring board is also formed on the third electrode part 161 of the adjustment member 16.
- Twenty second connecting members 26 come into contact with each other and are electrically connected.
- the heights of the contact surfaces of both are substantially uniform. It is. Further, bumps are not provided on the upper surfaces of the first electrode portion 151 and the third electrode portion 161. Therefore, when the head chip 10 and the wiring substrate 20 are pressure-bonded, nonuniform pressure is not applied to the first electrode portion 151 and the third electrode portion 161. Thereby, it is not necessary to perform highly accurate pressure control in order to prevent damage to the piezoelectric element 15 and the like, and reliable electrical connection can be easily performed.
- the position of the tip of the first connecting member 25 and the position of the tip of the second connecting member 26 are also arranged at substantially the same height H2, reliable electrical connection can be more easily performed.
- the current density can be lowered. Moreover, it can avoid that the pressure at the time of the crimping
- some of the second connection members 26 among the plurality of second connection members 26 come into electrical contact with only the conductive material 163 filled in the through holes 162 as shown in FIG. It is also preferable to arrange them so as to be connected to each other. By bringing some second connection members 26 into contact with the conductive material 163 before curing, the second connection portion 26 and the third electrode are simultaneously connected with the second connection portion 26 and the third electrode portion 161. Reliable fixation with the part 161 can be performed.
- the second wiring 23 of the wiring board 20 is made of a conductive material on the adjustment member 16. 163 may be directly contacted to be electrically connected. In this case, the removal portion 241 of the protective layer 24 covering the second wiring 23 is formed, and the second wiring 23 in a portion corresponding to the conductive material 163 is exposed. In addition, the conductive material 163 is formed to have a sufficient height that can come into contact with the second wiring 23 exposed in the removal portion 241 when the second connection portion 26 and the third electrode portion 161 are electrically connected. Is done.
- a wiring board 20 having a first wiring 22 and a second wiring 23 formed on the substrate body 21 by a conventionally known method is prepared (FIG. 5A).
- the first connection portion 25 and the second connection portion 26 are formed by stud bumps on each of the first wiring 22 and the second wiring 23 exposed on the lower surface of the wiring board 20 (FIG. 5B).
- the head chip 10 has a convex shape in the direction in which the head chip 10 is arranged, and the position of the tip of the first connecting part 25 and the position of the tip of the second connecting part 26 are arranged in the head chip 10.
- the first connecting member 25 and the second connecting member 26 are formed so as to be arranged at a height H2 that is substantially equal to the Z direction, which is the direction to be formed (connecting member forming step).
- conductive materials 251 and 261 are applied to the first connection member 25 and the second connection member 26, respectively, as shown in FIG.
- Application of the conductive materials 251 and 261 can be performed, for example, as follows. First, a conductive material film is formed on a glass substrate with a predetermined thickness. Then, the wiring substrate 20 is overlaid on the glass substrate, and the tips of the first connection member 25 and the second connection member 26 are brought into contact with the film of the conductive material. Thereafter, the conductive material on the glass substrate is transferred to the tips of the first connecting member 25 and the second connecting member 26 by separating the wiring substrate 20 and the glass substrate. According to this, the conductive material can be collectively applied to the tips of the plurality of first connection members 25 and the plurality of second connection members 26.
- the head chip 10 in which the nozzle plate 11, the intermediate plate 12, the pressure chamber plate 13, and the diaphragm layer 14 are laminated by a conventionally known method is prepared (FIG. 6A).
- the second electrode portion 152 is laminated on the upper surface of the diaphragm layer 14 of the head chip 10.
- the second electrode portion 152 can be formed to have a predetermined pattern by, for example, a sputtering method.
- a lead portion 153 that is electrically drawn from the second electrode portion 152 to the outside of the formation region of the piezoelectric element 15 is simultaneously formed.
- the piezoelectric element 15 and the adjustment member 16 are stacked on the upper surface of the second electrode portion 152 and the upper surface of the lead portion 153, respectively.
- a thin film PZT is laminated on the upper surface of the second electrode portion 152 with a predetermined thickness
- an electrode film that becomes the first electrode portion 151 is laminated on the entire upper surface of the thin film PZT with a predetermined thickness.
- the thin film PZT and the electrode film are simultaneously laminated on the upper surface of the lead portion 153.
- the first electrode portion 151 and the third electrode portion 161 are formed into a pattern by etching the electrode film so that the arrangement and shape of the piezoelectric element 15 and the adjustment member 16 shown in FIG. 2 are obtained. Then, the thin film PZT is etched using the first electrode portion 151 and the third electrode portion 161 as a mask, thereby forming the piezoelectric element 15 on the pressure chamber 131 and the adjusting member 16 on the extraction portion 153 (piezoelectric element formation). Process, adjustment member formation process; FIG.6 (c)).
- the piezoelectric element 15 and the first electrode portion 151 on the second electrode portion 152 and the adjustment member 16 on the lead portion 153 are simultaneously formed in the same process corresponding to the pressure chamber 131. It is formed. For this reason, the manufacturing process can be simplified, and the piezoelectric element 15 and the adjustment member 16 in which the upper surface of the first electrode portion 151 and the upper surface of the third electrode portion 161 are substantially equal in height H1 are easily formed. can do.
- the spacer substrate 30 is bonded to the upper surface of the head chip 10 (FIG. 7A). Openings 31 and 32 and a through hole 33 are formed in the spacer substrate 30 in advance.
- the piezoelectric element 15 and the adjustment member 16 of the head chip 10 are accommodated in the openings 33 and 32, and the through hole 33 communicates with the ink inflow hole 132.
- the conductive material 162 is filled into the through-hole 162 of the adjustment member 16 using, for example, the needle 60 (FIG. 7B).
- the conductive material 162 can overflow from the upper end of the through hole 162 and can be spread on the third electrode portion 161 around the through hole 162.
- the third electrode part 161 and the lead part 153 can be easily conducted through the conductive material 163. Further, since the adjustment member 16 is disposed in the opening 32, the periphery of the adjustment member 16 is surrounded by the spacer member 30. Thereby, even if the conductive material 162 overflows from the upper surface of the adjustment member 16, it can remain in the opening 32 and there is no possibility of causing a short circuit.
- the wiring substrate 20 is bonded to the laminate of the head chip 10 and the spacer substrate 30 from above (bonding step; FIG. 8).
- the first connection member 25 of the wiring board 20 is in contact with the first electrode portion 151 on the piezoelectric element 15, and the second connection member 26 is in contact with the third electrode portion 161 of the adjustment member 16. Connected.
- the upper surface of the first electrode portion 151 on the piezoelectric element 15 and the upper surface of the third electrode portion 161 of the adjustment member 16 are substantially equal in height
- the wiring board 20 has the first connection member 25 of the first connection member 25. Since the position of the tip and the position of the tip of the second connection member 26 are substantially equal in height, the heights of these contact surfaces are substantially uniform. Therefore, when the head chip 10 and the wiring board 20 are pressure-bonded, nonuniform pressure is not applied to each electrical connection portion. Thereby, it is not necessary to perform highly accurate pressure control in order to prevent damage to the piezoelectric element 15 and the like, and reliable electrical connection can be more easily performed.
- the manifold 40 shown in FIG. 1 is joined to the upper surface of the wiring substrate 20 so that all the ink supply holes 27 opened to the upper surface of the wiring substrate 20 face the ink storage chamber 41 in the manifold 40.
- the ink jet head 1 is completed in which ink is supplied from the ink storage chamber 41 to all the pressure chambers 131 in common.
- the adjustment member 16 described above has the through hole 162
- the adjustment member 16 is formed so as to be concave inward from the side surface of the adjustment member 16 as shown in FIG. 9 instead of the through hole 162. You may form the groove
- the conductive material 163 is filled in the groove 164 so as to electrically connect the lead portion 153 and the third electrode portion 161.
- the piezoelectric element 15 may be a bulk piezoelectric element formed in advance with a predetermined size and thickness.
- the bulk piezoelectric elements are individually attached at positions corresponding to the pressure chambers 131 on the diaphragm layer 14.
- the piezoelectric element used for the adjustment member 16 is also a bulk piezoelectric element formed in advance with the same thickness as the piezoelectric element 15, and the adjustment member 16 is formed by sticking to the upper surface of the extraction portion 153. It is preferable to do so. Thereby, the height of the upper surface of the first electrode portion 151 of the piezoelectric element 15 and the height of the upper surface of the adjustment member 16 can be easily matched to substantially the same height.
- the adjustment member 16 when the adjustment member 16 is a single member, the whole can be formed of metal.
- the adjustment member 16 itself can be electrically connected to the drawer portion 153 by laminating a metal material formed with a predetermined thickness and shape using a metal such as Ni, Cu, or Al on the drawer portion 153. .
- polishing is performed so that the height is substantially equal to the upper surface of the piezoelectric element 15, whereby the height of the upper surface of the adjustment member 16 is set to the height of the first electrode portion 151 of the piezoelectric element 15. It can be adjusted to be approximately equal to the height of the upper surface.
- Inkjet head 10 Head chip 11: Nozzle plate 111: Nozzle 12: Intermediate plate 121: Communication path 13: Pressure chamber plate 131: Pressure chamber 132: Ink inflow hole 14: Vibration plate layer 15: Piezoelectric element 151: First Electrode part 152: Second electrode part 153: Leading part 16: Adjustment member 161: Third electrode part 162: Through hole 163: Conductive material 164: Groove 20: Wiring board 21: Substrate body 22: First wiring 221: Through Wiring part 222: First upper wiring part 23: Second wiring 231: Through wiring part 232: Second upper wiring part 24: Protective layer 241: Removal part 25: First connecting member 251: Conductive material 26: First 2 connection member 261: conductive material 27: ink supply hole 30: spacer substrate 31, 32: opening 3: through hole 34: air escape groove 35: suction groove 40: manifold 41: the ink storage chamber 50: FPC 60: Needle
Abstract
Description
前記ヘッドチップの上方に配置され、前記ヘッドチップの前記第1電極部と電気的に接続されるスタッドバンプからなる第1接続部材と、前記引出部を介して前記第2電極部と電気的に接続されるスタッドバンプからなる第2接続部材とを有する配線基板と、
を備えるインクジェットヘッドにおいて、
前記引出部に、前記第1電極部の高さと略等しい高さに配置された上面を備えると共に少なくとも該上面が前記引出部と導通している調整部材が設けられ、
前記配線基板の前記第1接続部材は、前記第1電極部の上面に接触することにより、該第1電極部と電気的に接続されると共に、前記第2接続部材は、前記調整部材の前記上面に接触することにより、該調整部材及び前記引出部を介して前記第2電極部と電気的に接続されるインクジェットヘッド。
前記孔又は前記溝に導電性材料が充填されることにより、該導電性材料を介して前記第3電極部と前記引出部とが電気的に接続されている前記4記載のインクジェットヘッド。
前記ヘッドチップの上方に配置され、前記ヘッドチップの前記第1電極部と電気的に接続される第1接続部材と、前記引出部を介して前記第2電極部と電気的に接続される第2接続部材とを有する配線基板と、
を備えるインクジェットヘッドの製造方法において、
前記ヘッドチップに、前記圧力室に対応して、前記第1電極部と前記第2電極部を備えた前記圧電素子を形成する圧電素子形成工程と、
前記ヘッドチップに、前記引出部を形成する引出部形成工程と、
前記引出部に、前記第1電極部の高さと略等しい高さに配置された上面を備えると共に該上面が前記引出部と導通する調整部材を形成する調整部材形成工程と、
前記第1接続部材を前記第1電極部の上面に接触させることにより、前記第1電極部と電気的に接続させると共に、前記第2接続部材を前記調整部材の前記上面に接触させることにより、前記調整部材を介して前記第2電極部と電気的に接続させるように前記配線基板と前記ヘッドチップとを接合する接合工程と、
を有するインクジェットヘッドの製造方法。
前記調整部材形成工程において、前記調整部材に用いられる前記圧電素子を、前記圧電素子形成工程によって前記圧力室に対応する前記圧電素子を形成する際に同時に形成する前記11記載のインクジェットヘッドの製造方法。
図1は、本発明に係るインクジェットヘッドの一例を示す断面図、図2はインクジェットヘッドのヘッドチップの平面図、図3はインクジェットヘッドの部分拡大断面図である。
次に、インクジェットヘッドの製造方法の一例について、図5~図8を用いて説明する。
以上説明した調整部材16は、貫通孔162を形成したが、貫通孔162に代えて、図9に示すように、調整部材16の側面から内方に向けて凹となるように、調整部材16の高さ方向に亘って切欠された溝164を形成してもよい。この場合、導電性材料163は、引出部153と第3電極部161とを電気的に接続するように、溝164内に充填される。
10:ヘッドチップ
11:ノズルプレート
111:ノズル
12:中間プレート
121:連通路
13:圧力室プレート
131:圧力室
132:インク流入孔
14:振動板層
15:圧電素子
151:第1電極部
152:第2電極部
153:引出部
16:調整部材
161:第3電極部
162:貫通孔
163:導電性材料
164:溝
20:配線基板
21:基板本体
22:第1配線
221:貫通配線部
222:第1の上部配線部
23:第2配線
231:貫通配線部
232:第2の上部配線部
24:保護層
241:除去部
25:第1接続部材
251:導電性材料
26:第2接続部材
261:導電性材料
27:インク供給孔
30:スペーサー基板
31、32:開口部
33:貫通孔
34:空気逃がし溝
35:吸着溝
40:マニホールド
41:インク貯留室
50:FPC
60:ニードル
Claims (14)
- ノズルから吐出されるインクが収容される圧力室と、前記圧力室に対応して設けられ、上面に第1電極部が形成されると共に、下面に第2電極部が形成された圧電素子と、前記第2電極部から前記圧電素子の外側に電気的に引き出された引出部とを有するヘッドチップと、
前記ヘッドチップの上方に配置され、前記ヘッドチップの前記第1電極部と電気的に接続されるスタッドバンプからなる第1接続部材と、前記引出部を介して前記第2電極部と電気的に接続されるスタッドバンプからなる第2接続部材とを有する配線基板と、
を備えるインクジェットヘッドにおいて、
前記引出部に、前記第1電極部の高さと略等しい高さに配置された上面を備えると共に少なくとも該上面が前記引出部と導通している調整部材が設けられ、
前記配線基板の前記第1接続部材は、前記第1電極部の上面に接触することにより、該第1電極部と電気的に接続されると共に、前記第2接続部材は、前記調整部材の前記上面に接触することにより、該調整部材及び前記引出部を介して前記第2電極部と電気的に接続されるインクジェットヘッド。 - 前記調整部材は、ポアソン比0.4以下の材料を用いて形成されている請求項1記載のインクジェットヘッド。
- 前記調整部材の前記上面は、前記圧力室に対応して設けられる前記圧電素子の上面の前記第1電極部の面積と同等以上の面積を有している請求項1又は2記載のインクジェットヘッド。
- 前記調整部材は、前記引出部と導通する第3電極部が上面に設けられた圧電素子によって形成されている請求項1、2又は3記載のインクジェットヘッド。
- 前記調整部材に用いられる前記圧電素子は、高さ方向に貫通した孔又は高さ方向に亘って切欠された溝を有し、
前記孔又は前記溝に導電性材料が充填されることにより、該導電性材料を介して前記第3電極部と前記引出部とが電気的に接続されている請求項4記載のインクジェットヘッド。 - 前記第2接続部材は複数設けられ、前記複数の第2接続部材のうちの一部の前記第2接続部材は、前記孔又は前記溝に充填された前記導電性材料のみと接触している請求項5記載のインクジェットヘッド。
- 前記第2接続部材は複数設けられ、前記複数の第2接続部材に対して共通の前記調整部材の前記上面に電気的に接続されている請求項1~5の何れかに記載のインクジェットヘッド。
- 前記圧力室は複数設けられ、該圧力室に対応して設けられる複数の前記圧電素子に形成されたそれぞれの前記第2電極部は、前記複数の第2電極部に対して共通の前記引出部に電気的に引き出されている請求項1~7の何れかに記載のインクジェットヘッド。
- 前記第1接続部材及び前記第2接続部材の先端の位置は、前記ヘッドチップが配置される方向に略等しい高さに配置されている請求項1~8の何れかに記載のインクジェットヘッド。
- 前記第1接続部材及び前記第2接続部材には、それぞれ導電性材料が塗布され、該導電性材料を介して、前記第1電極部の前記上面及び前記調整部材の前記上面と電気的に接続されている請求項1~9の何れかに記載のインクジェットヘッド。
- ノズルから吐出されるインクが収容される圧力室と、前記圧力室に対応して設けられ、上面に第1電極部が形成されると共に、下面に第2電極部が形成された圧電素子と、前記第2電極部から前記圧電素子の外側に電気的に引き出された引出部とを有するヘッドチップと、
前記ヘッドチップの上方に配置され、前記ヘッドチップの前記第1電極部と電気的に接続される第1接続部材と、前記引出部を介して前記第2電極部と電気的に接続される第2接続部材とを有する配線基板と、
を備えるインクジェットヘッドの製造方法において、
前記ヘッドチップに、前記圧力室に対応して、前記第1電極部と前記第2電極部を備えた前記圧電素子を形成する圧電素子形成工程と、
前記ヘッドチップに、前記引出部を形成する引出部形成工程と、
前記引出部に、前記第1電極部の高さと略等しい高さに配置された上面を備えると共に該上面が前記引出部と導通する調整部材を形成する調整部材形成工程と、
前記第1接続部材を前記第1電極部の上面に接触させることにより、前記第1電極部と電気的に接続させると共に、前記第2接続部材を前記調整部材の前記上面に接触させることにより、前記調整部材を介して前記第2電極部と電気的に接続させるように前記配線基板と前記ヘッドチップとを接合する接合工程と、
を有するインクジェットヘッドの製造方法。 - 前記調整部材は、前記引出部と導通する第3電極部を上面に設けた圧電素子によって形成され、
前記調整部材形成工程において、前記調整部材に用いられる前記圧電素子を、前記圧電素子形成工程によって前記圧力室に対応する前記圧電素子を形成する際に同時に形成する請求項11記載のインクジェットヘッドの製造方法。 - 前記圧電素子は薄膜PZTであり、該薄膜PZTをエッチングすることによって、前記圧力室に対応する前記圧電素子と、前記調整部材に用いられる前記圧電素子とを同時にパターン形成する請求項12記載のインクジェットヘッドの製造方法。
- 前記配線基板に、前記第1接続部材及び前記第2接続部材を、前記ヘッドチップが配置される方向に凸の形状となるように形成すると共に、先端の位置が、前記ヘッドチップが配置される方向に略等しい高さに配置されるように形成する接続部材形成工程を有する請求項11、12又は13記載のインクジェットヘッドの製造方法。
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003072068A (ja) * | 2001-08-31 | 2003-03-12 | Fuji Xerox Co Ltd | インクジェット記録ヘッド及びインクジェット記録装置 |
JP2004304025A (ja) * | 2003-03-31 | 2004-10-28 | Kyocera Corp | 圧電アクチュエータ、インクジェット記録ヘッドおよびこれらの製造方法 |
WO2012176875A1 (ja) * | 2011-06-22 | 2012-12-27 | コニカミノルタホールディングス株式会社 | インクジェットヘッド及びインクジェット描画装置 |
JP2013035193A (ja) * | 2011-08-05 | 2013-02-21 | Konica Minolta Holdings Inc | 電子回路基板の接合方法及びインクジェットヘッドの製造方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2002057187A (ja) * | 2000-08-09 | 2002-02-22 | Fujitsu Ten Ltd | 電子部品実装構造及び電子部品実装方法 |
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 |
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US8220905B2 (en) * | 2006-08-23 | 2012-07-17 | Brother Kogyo Kabushiki Kaisha | Liquid transporting apparatus and method of producing liquid transporting apparatus |
WO2011005699A2 (en) * | 2009-07-10 | 2011-01-13 | Fujifilm Dimatix, Inc. | Mems jetting structure for dense packing |
JP5476901B2 (ja) * | 2009-09-30 | 2014-04-23 | ブラザー工業株式会社 | 圧電アクチュエータの製造方法及び圧電アクチュエータ |
JP6044258B2 (ja) * | 2012-10-19 | 2016-12-14 | コニカミノルタ株式会社 | インクジェットヘッド |
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003072068A (ja) * | 2001-08-31 | 2003-03-12 | Fuji Xerox Co Ltd | インクジェット記録ヘッド及びインクジェット記録装置 |
JP2004304025A (ja) * | 2003-03-31 | 2004-10-28 | Kyocera Corp | 圧電アクチュエータ、インクジェット記録ヘッドおよびこれらの製造方法 |
WO2012176875A1 (ja) * | 2011-06-22 | 2012-12-27 | コニカミノルタホールディングス株式会社 | インクジェットヘッド及びインクジェット描画装置 |
JP2013035193A (ja) * | 2011-08-05 | 2013-02-21 | Konica Minolta Holdings Inc | 電子回路基板の接合方法及びインクジェットヘッドの製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019048412A (ja) * | 2017-09-08 | 2019-03-28 | コニカミノルタ株式会社 | インクジェットヘッド及びインクジェット記録装置 |
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