WO2004080720A1 - インクジェットヘッド、インクジェットヘッドモジュール及びその製造方法 - Google Patents
インクジェットヘッド、インクジェットヘッドモジュール及びその製造方法 Download PDFInfo
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- WO2004080720A1 WO2004080720A1 PCT/JP2004/003054 JP2004003054W WO2004080720A1 WO 2004080720 A1 WO2004080720 A1 WO 2004080720A1 JP 2004003054 W JP2004003054 W JP 2004003054W WO 2004080720 A1 WO2004080720 A1 WO 2004080720A1
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- WIPO (PCT)
- Prior art keywords
- ink
- electrode
- external circuit
- ink chambers
- ink chamber
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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
- B41J2/1632—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
- B41J2/1607—Production of print heads with piezoelectric elements
- B41J2/1609—Production of print heads with piezoelectric elements of finger type, chamber walls consisting integrally of piezoelectric material
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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
- B41J2002/14491—Electrical connection
-
- 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
- B41J2202/00—Embodiments of or processes related to ink-jet or thermal heads
- B41J2202/01—Embodiments of or processes related to ink-jet heads
- B41J2202/11—Embodiments of or processes related to ink-jet heads characterised by specific geometrical characteristics
Definitions
- the present invention relates to an inkjet head, an inkjet head module, and a method for manufacturing the same, and more particularly, to a structure around an external electrode and a method for manufacturing the same.
- An ink jet head that discharges ink by using a shear mode of a piezoelectric material has been conventionally proposed (for example, see Japanese Patent Application Laid-Open No. H04-2595953 (see paragraph "0118"). ”And Figure 4)).
- Such a conventional ink jet head is, for example, as shown in FIG. 13, a piezoelectric material that has been subjected to polarization processing in the thickness direction and bonded to a piezoelectric material in which the polarization directions are opposite to each other.
- An actuating member 100 having a plurality of grooves formed therein, a cover member 110 having an ink supply port 111 and a common ink chamber 112 formed therein, and a nozzle hole 121 are formed.
- An ink chamber 112 is formed by a plurality of grooves by laminating the nozzle plate 120 with the nozzle plate 120, and in each of the ink chambers 112, an electric field is applied to a partition partitioning the ink chamber.
- An electrode 101 for application is formed.
- the rear half 102 of the ink chamber 112 has an R-shaped bottom surface, and a flat portion 103 is formed as an electrode lead-out portion for connection to an external circuit.
- the ink jet head and the driving IC 130 disposed on the support substrate 140 are connected to the electrodes 104 formed on the flat portion 103 by an aluminum wire 133 by wire bonding technology. Is making electrical connection.
- the frame to which the driving IC 130 is connected is connected.
- An external electrode formed on a kibble substrate or the like can be connected by an ACF (anisotropic conductive film) connection technology.
- ACF anisotropic conductive film
- a method for extending the ink chamber electrode of a conventional ink jet head to a flat portion will be described with reference to FIGS. 14A and 14B.
- a dry film resist 150 is laminated on the main surface of the actuating member 100 and cured.
- the piezoelectric material was half-diced to form a groove that later became an ink chamber, and the dicing blade 160 was raised to correspond to the diameter of the dicing blade.
- An R-shaped portion is formed in the rear half portion 102 of the ink chamber, and then only dry film resist 150 is applied to the flat portion.
- a metal electrode material such as A1 or Cu is formed in the ink chamber by using a sputtering technique or a plating technique. Also, the metal film is formed on the R-shaped portion of the ink chamber rear half 102 and the opening of the dry film resist 150 in the flat portion in the same manner, and becomes a connection electrode with an external circuit.
- the actuator member 100 formed in this manner performs share mode driving by applying an opposite-phase potential to an electrode formed on a partition partitioning the ink chamber and facing the electrode via the partition. . That is, at the boundary where the ink chamber partitions are bonded symmetrically in the thickness direction with respect to the polarization direction, the ink chamber partitions are deformed into the shape of a "ku", thereby changing the volume of the ink chamber. Then, ink droplets are ejected from minute nozzles arranged at the tip of the ink chamber due to the change in the ink pressure in the ink chamber accompanying the change.
- a so-called active area that contributes to the ink ejection operation is located at the front end of the ink supply hole 111 and the common ink chamber 112. (First half) only, and the rear end (second half) including the ink supply holes 1 1 1 is the area for ink supply.
- the larger R portion and flat portion 103 are used as extraction electrodes for connecting the electrode 101 in the ink chamber to an external circuit.
- the flat portion 103 is a region for making an electrical connection with the electrode that is electrically connected to the driving IC 130.
- Such an ink-jet head configuration has a problem in that the portion other than the active area that originally contributes to ink ejection is very large, which increases material costs and makes it impossible to manufacture ink jet heads at low cost.
- the dullness of the applied drive waveform can be improved by increasing the applied voltage.
- the applied voltage by increasing the applied voltage, the amount of heat generated by driving the actuator is increased, and the temperature of the actuator is increased. For this reason, there is a problem that the ink viscosity changes, and stable and high-precision printing cannot be performed.
- a driving IC that can apply a high voltage increases in cost, and a high voltage is applied. There were problems such as durability due to early deterioration of piezoelectric material characteristics and difficulty in reducing power consumption.
- a structure in which the ink supply hole and the area for extending the ink chamber electrode are not required in the longitudinal direction of the piezoelectric element See, for example, Japanese Patent Application Publication No. 09-094954 (Paragraph “008”, FIG. 1).)
- an ink supply hole is provided at the rear end of the active area of the piezoelectric material, and the electrode 101 in the ink chamber 112 is extended to the ink supply side surface or the ink discharge side surface.
- an electrical connection is made with the electrode 171, which is electrically connected to the driving IC 170.
- the material cost of the piezoelectric material can be reduced, but the electrode 101 in the ink chamber 112 is placed on the side of the actuator.
- the electrode must be drawn out at a substantially right angle.
- an electrode separation step using a dicing YAG laser after resist patterning or solid electrode extraction beforehand is required, which makes the process extremely complicated and lowers productivity.
- the production yield is reduced and the production cost is increased.
- the electrode that is drawn out is a bent part that is drawn out from the ink chamber 1 12 to the side of the actuator, and is likely to be disconnected (broken) in later processes and transport, which lowers the production yield.
- FIG. 16 shows the ink jet head, FIG. 16A is a front sectional view, FIG. 16B is an XX sectional view, and FIG. 16C is a Y—Y It is sectional drawing.
- the electrodes for external connection are formed of a conductive material 105 filled in the ink chamber. Since there is no need to draw it out, almost all parts other than the activator of Actuyue 100 are not required, and material costs can be reduced.
- the driving frequency can be increased by reducing the capacitance, high-speed printing can be performed, and the driving voltage can be reduced, so that the withstanding voltage of the driving IC can be reduced. Power consumption can also be reduced.
- the present invention has been made in view of such circumstances. Even if the pitch of the ink chamber array is reduced, the ink chamber array can be stably connected to an external circuit with low connection resistance, and is excellent in environmental reliability and high-speed printing. The purpose is to provide an inexpensive ink jet head. Disclosure of the invention n
- the present invention has been made in order to solve the above-mentioned problems.
- a driving electrode provided on the partition wall and exposed to each of the plurality of ink chambers
- An external circuit connection electrode provided in each of the plurality of ink chambers for connecting the drive electrode to an external circuit
- Each of the external circuit connection electrodes is formed on each exposed surface of the conductive material, and each of the exposed surfaces has a cross-sectional area in a groove width direction in each of the plurality of ink chambers. It is set to a wider area.
- each of the external circuit connection electrodes for connection to the external circuit has a cross-sectional area larger than the cross-sectional area of the ink chamber in the groove width direction, and the conductive material filled in the groove communicating with the ink chamber. It is formed on the exposed surface at the rear end of the head.
- the capacitance of the ink jet head is reduced due to a significant decrease in portions other than the active area.
- the driving frequency can be increased, and high-speed printing can be realized.
- the drive voltage can be reduced, the withstand voltage of the drive IC can be reduced, and the drive IC cost and drive power consumption can be reduced.
- the external circuit connecting electrode of the filled conductive material has a cross-sectional area larger than the ink chamber cross-sectional area, even if it is a narrow pitch jet head, it is wide. ⁇
- Electrical connection with external circuit electrodes can be made in a small area, and stable connection can be achieved with low connection resistance. As a result, excellent environmental reliability can be ensured, and a high-frequency and stable driving waveform can be sent to the driving electrode, thereby enabling high-speed printing.
- the conductive material is filled in a deep groove formed partially deep in the rear end of the head in the ink chamber. Further, by forming a wide groove partially at the rear end of the head, the wide groove may be filled with the conductive material.
- FIG. 1 is a sectional view of an ink jet head according to an embodiment of the present invention.
- FIG. 2 is a cross-sectional view of the ink jet head module connected to the driving IC.
- FIG. 3 is an explanatory diagram of a method for manufacturing the inkjet head.
- FIG. 4 is an explanatory diagram of the same.
- FIG. 5 is an explanatory diagram of the same.
- FIG. 6 is a cross-sectional view of an ink jet head according to the different embodiment.
- FIG. 7 is a cross-sectional view of an inkjet head module according to another embodiment connected to the driving IC.
- FIG. 8 is a cross-sectional view showing an ink jet head according to another embodiment.
- FIG. 9 is a sectional view of an ink jet head module according to another embodiment connected to the driving IC.
- FIG. 10 is an explanatory diagram of a method for manufacturing an ink jet head according to another embodiment.
- FIG. 11 is an explanatory diagram of the same.
- FIG. 12 is an explanatory diagram of the same.
- FIG. 13 is a sectional view showing an example of a conventional ink jet head.
- FIG. 14 is an explanatory diagram of the same manufacturing method.
- FIG. 15 is a cross-sectional view showing a different example of the same ink jet head.
- FIG. 16 is a sectional view showing another example of the ink jet head.
- FIG. 1 is a cross-sectional view of the inkjet head.
- 1A is a front sectional view
- FIG. 1B is an XX sectional view
- FIG. 1C is a XY sectional view.
- This ink jet head is made of a conductive material containing Ag conductive filler in a groove 23 leading to the ink chamber 22 of the rear end (head rear end) 21 of the actuator 20 made of a PZT piezoelectric material. Resin 10 is filled.
- the exposed portion (exposed surface) of the conductive resin 10 on the end surface where the conductive resin 10 is cut off at the rear end 21 of the actuator 20 is a conductive resin electrode serving as an external circuit connection electrode. It is 1 1
- the groove depth of the ink chamber 22 is deep at the rear end of the actuator 20 (see FIG. 1C), and the groove depth of the deep groove portion 23 is the ink chamber depth 100.
- the rear end 21 is set to 1102 m with respect to m.
- the width of the ink chamber 22 is set to 36 m. Therefore, the exposed area of the conductive resin 10 is 3960 nm 2.
- the PZT piezoelectric materials are polarized in opposite directions to each other.
- a chevron-type piezoelectric material wafer to which a PZT substrate is bonded is used.
- the depth of the ink chambers 22 is 100 m, and the pitch of each ink chamber 22 is 84.65 m pitch (300 m). (Equivalent to DPI), and the polarization direction is reversed in the upper half (50 nm) and lower half (50 nm) of the ink chamber 22.
- an electrode for driving the actuator is provided in the ink chamber 22, that is, on the surface of the ink chamber of the ink chamber partition wall 24 that partitions the ink chamber 22 of the ink chamber 22 and the bottom of the groove of the ink chamber 22, an electrode for driving the actuator is provided.
- the drive electrode 25 is formed, and the filled conductive resin 10 and the actuator drive electrode 25 are connected in a conductive state.
- a nozzle plate 41 having fine nozzles 40 is adhered to the ink discharge surface 26 of the actuator 20 and a cover is provided above the rear end 21 of the actuator 20.
- An ink supply port 42 formed in advance on the member 43 is provided.
- each ink chamber 22 arranged in an array is partitioned by an ink chamber partition wall 24 made of a piezoelectric material, and is connected to an actuating drive electrode 25 formed on each partition wall 24.
- Conducted conductive resin 10 is connected to an external circuit electrode (the external circuit of the present invention) in a later step as an external connection electrode. Since the upper half and the lower half of the ink chamber partition wall 24 are polarized in opposite directions in the thickness direction, by applying voltage of opposite phase to the electrodes facing each other on the front and back of the ink chamber partition wall 24, By controlling the ink pressure in the ink chamber 22 by acting as the function of the partition 24 being driven in the share mode, fine ink droplets can be ejected from the nozzle 40.
- the ink jet head is composed of an outer lead 52 formed on a TAB tape 51 electrically connected to a driving IC 50 and a rear end 21 of an actuator 20.
- a ⁇ 5 Hm It can be electrically and mechanically connected via an ACF (Anisotropic Conductive Film) 53 in which conductive particles having Ni and Au plating on the surface of the stick particles are dispersed and contained.
- the exposed area of the conductive resin electrode 11 formed as an electrode for external circuit connection of the inkjet head was set to 3960 l as described above, and as shown in Table 1, it was inexpensive. Connection using an AC F such as FP16613 or FP13413 manufactured by Sony Chemical Co., Ltd. or AC-7073 manufactured by Hitachi Chemical Co., Ltd. In this case, stable electrical connection can be performed with low connection resistance at low cost, so that excellent environmental reliability can be secured. In addition, since a stable driving waveform at a high frequency can be sent to the driving electrode 25, an ink jet head capable of high-speed printing can be obtained.
- connection resistance ( ⁇ ) is a sufficiently low value.
- the connection using the inexpensive ACF containing the usual amount of dispersed conductive particles as described above uses the electrode for the external circuit connection of the inkjet head. A good connection is made because at least five or more conductive particles contained in the ACF electrically connect the exposed surface of a certain conductive resin electrode 11 to the external circuit electrode lead 52. It was found to show sex.
- the area of the conductive resin electrode 11 in order to realize a low-cost head, it is necessary to design the area of the conductive resin electrode 11 to be equal to or more than 390 x m as a condition for obtaining the connection stability with an inexpensive ACF.
- the area effective for connection in the external circuit electrode 52 is larger than the area of the conductive resin electrode 11 of the inkjet head.
- the conductive resin electrode 11 is connected to the external circuit electrode 52 by making the electrode lead width of the external circuit electrode 52 wider than the pitch direction width (groove width) of the conductive resin electrode 11.
- the electrical connection can be stably performed with low connection resistance at low cost.
- excellent environmental reliability can be secured, and a stable driving waveform can be sent at a high frequency to the driving electrodes 25, realizing an ink jet head that can perform high-speed printing. can do.
- the blade is lowered from just above the groove using the same dicing blade 60. Perform chopper grinding. At this time, when forming the ink chamber, the deep groove portion 23 can be formed simultaneously in a series of steps.
- a metal film 73 serving as an electrode material such as Au, Ni, A1, Cu is formed on the entire surface of the ink chamber by a sputtering technique.
- the liquid conductive resin 10 is dispensed in a direction perpendicular to the array of the ink chambers 22 of the piezoelectric material wafer 72 with a dispenser 61 so as to have a width of 0.5 mm. Apply and supply one character on 2 and ink chamber partition 24. At this time, by adjusting the viscosity of the conductive resin 10 to 500 to 150 cps, the ink is naturally filled to the bottom of the ink chamber 22.
- the ink chamber 22 can be naturally filled up to the bottom.
- the conductive resin 10 is cured by heating.
- a conductive resin that uses a resin that reacts at room temperature without heating and curing as a binder can be cured by leaving it at room temperature.
- the metal film 73 and the conductive resin 10 that are short-circuited on the ink chamber partition wall 24 are ground with a wrapping film or the like (not shown), so that the drive electrodes 25 and Electrical separation is performed for each of the ink chambers 22 of the filled conductive resin 10.
- the cover wafer 74 uses the same material as the piezoelectric material forming the ink chamber 22 in order to improve the matching of the thermal expansion coefficient with the actuator forming the ink chamber 22.
- a relatively close, inexpensive alumina ceramic may be used.
- the ink chamber wafer 72 on which the ink chamber 22 array is formed and the cover wafer 74 are bonded with a commercially available adhesive.
- the portion filled with the conductive resin 10 is positioned so as to come to the center of the Zaddari portion for the ink supply port 42 of the cover wafer 74, as shown in the sectional view of FIG.5B. Paste the two together.
- the conductive resin-filled portion of the ink chamber wafer 72 at the dicing portion for the ink supply port of the cover wafer 74 is individually cut by a dicing blade of a dicer (not shown). It is fragmented in the evening (inkjet head).
- the cut surface of the conductive resin 10 is exposed on one side of the actuator, and is electrically connected to the external circuit electrode that is connected to the driving IC to be connected later.
- the connection electrode that is, the external circuit connection electrode 11 is formed.
- the upper surface of the ink chamber 22 is sealed with a cover member 43 to serve as a driving part for controlling the pressure in the ink chamber. 1 is pasted to complete the above-mentioned factory (ink-jet head or ink-jet head module) shown in Fig. 1 and Fig. 2.
- the external circuit connection electrode 11 has a cross-sectional area larger than the cross-sectional area of the ink chamber 22 in the direction perpendicular to the ink chamber array, and is filled in a groove communicating with the ink chamber 22.
- conductive resin 10 Formed on the exposed surface at the rear end 21 of the gate.
- the electrodes inside the ink chamber were conventionally drawn out of the ink chamber for mounting.However, this is no longer necessary, and parts other than the active area of the actuator are almost unnecessary, so that material cost can be greatly reduced. I can do it.
- the capacitance is reduced, the driving frequency can be increased, high-speed printing is possible, and the driving voltage can be reduced, so that the withstand voltage of the driving IC can be reduced. Cost and drive power consumption can be reduced.
- the external circuit connection electrode 11 formed on the cut surface of the filled conductive resin 10 has a cross-sectional area larger than the ink chamber cross-sectional area. Electrical connection with the external circuit electrode 52 can be made in a large area, and connection can be made stably with low connection resistance. As a result, it has excellent environmental reliability and can send a high-frequency and stable driving waveform to the ink jet head, thereby enabling high-speed printing.
- the external circuit connection electrode 11 connected to the external circuit electrode 52 can secure an exposed area of the conductive resin 10 serving as the connection surface of 3960 iim 2 or more. Therefore, in the electrical connection between the inkjet head and the external circuit electrode 52, even when using an inexpensive ACF with a relatively small amount of conductive particles dispersed, a sufficient electrode area is provided, and the connection resistance is low and the connection resistance is low. Stable external circuit connection with little variation. As a result, excellent environmental reliability can be secured, and a high-frequency and stable driving waveform can be sent to the driving electrode 25, so that high-speed printing can be performed.
- the ink jet head module which is a connection between the ink jet head and the external circuit electrode 52 connected to the driving IC 50, has an anisotropic connection between the ink jet head and the external circuit electrode 52.
- the conductive material which is the electrode 11 for connecting an external circuit to the ink jet head via the conductive conductive material, is exposed.
- the surface and the external circuit electrodes 52 are electrically connected by at least five or more conductive particles of an anisotropic conductive material.
- connection resistance is low, the connection resistance variation is small, and the stable external connection is achieved.
- Circuit connection can be made, which can ensure excellent environmental reliability, and can send a stable driving waveform at high frequency to the driving electrode 25, so that high-speed printing can be performed. It is possible.
- the area of the connection portion of the external circuit electrode 52 of the ink jet head module is larger than the area of the external circuit connection electrode 11 of the ink jet head. Therefore, a large margin for connection position alignment can be secured, and the connection position accuracy is relaxed, so that the entire external circuit connection electrode of the ink jet head can be stably used for electrical connection. . Therefore, productivity is improved, connection resistance variation is low with low connection resistance, and stable external circuit connection can be performed. As a result, excellent environmental reliability can be secured, and a high-frequency and stable driving waveform can be sent to the driving electrode 25, so that high-speed printing can be performed.
- the shape and area of the external circuit connection electrode 11 of the ink jet head and the shape of the external circuit electrode 52 are the same and the area is equal. In such a case, a high precision is required for positioning the connection between the external circuit connection electrode 11 and the external circuit electrode 52 of the inkjet head, so that the production yield is reduced.
- Such an ink jet head can be manufactured by a manufacturing method including at least the following steps. That is, a step of forming ink chamber grooves at a predetermined pitch in the piezoelectric material wafer that has been subjected to the polarization process in the thickness direction, a step of forming a groove deeper than the ink chamber groove leading to the ink chamber groove, Forming a driving electrode in a groove formed in a groove formed in the cooling chamber and a groove deeper than the ink chamber. ⁇ ⁇
- the ink jet head manufactured by such a manufacturing method has an external circuit connection electrode 11 made of a filled conductive material, which has a cross-sectional area larger than the ink chamber cross-sectional area. Electrical connection with the circuit electrode 52 can be stably performed. That is, even in the case of a narrow-pitch ink jet head, electrical connection with the external circuit electrode 11 can be made with a large-area connecting electrode, so that the connection can be stably performed with a low connection resistance. As a result, excellent environmental reliability can be ensured, and a high-frequency and stable driving waveform can be sent to the ink jet head, thereby enabling high-speed printing.
- the groove 23 deeper than the ink chamber 22 is filled with the conductive resin 10, and the area of the conductive resin electrode 11 that is later exposed to the cut surface of the ink jet head is enlarged.
- the same effect can be expected by forming the groove width wider than the ink chamber 22 to form the wide groove 27.
- the depth of the ink chamber 22 shown in FIG. 6 is 100 xm
- the cross-sectional shape of the conductive resin electrode 11 is processed to a depth of 90 / m
- the width of the ink chamber is 36.
- the rear end is machined to a groove width of 45 m, and the area of the conductive resin electrode 11 is larger than that of the ink chamber 22 and is set to 3960 zm2.
- stable external circuit connection can be realized at low cost by using an inexpensive ACF 53 with the external circuit lead 52 connected to the driving IC 50. Further, since the groove width is wide, the filling property of the conductive resin 10 is good, and the production yield in the filling step of the conductive resin 10 can be improved.
- Such an ink jet head can be manufactured by a manufacturing method including at least the following steps. That is, polarization processing is performed in the thickness direction. 1 o
- the external circuit connection electrode 11 of the filled conductive material has a cross-sectional area larger than the cross-sectional area of the ink chamber 22, an external circuit electrode 5 2 Electrical connection with the device can be performed more stably.
- electrical connection with the external circuit electrode 52 can be made with a large-area connection electrode, and a stable connection can be made with a low connection resistance.
- high-speed printing is possible because of excellent environmental reliability and stable transmission of the drive waveform to the inkjet head at a high frequency.
- FIG. 8 is a cross-sectional view of the inkjet head.
- a conductive resin 10 containing an Ag conductive filler is filled at a rear end of an actuator 28 made of a PZT piezoelectric material, and a rear end of the actuator 28 is formed.
- the portion where the conductive resin 10 is exposed on the upper surface of the portion filled with the conductive resin 10 is defined as an external circuit connection electrode 12.
- the ink chamber 22 has a shallow groove depth at the rear end side of the actuator 28, but is unnecessary because the electrode area sandwiching the ink chamber partition is smaller than the deep and uniform ink chamber shape.
- the capacitance can be reduced. As a result, drive power consumption can be reduced and drive waveform dulling can be more effectively prevented.
- the flow of the ink can be made smooth.
- the groove depth is set to 50 urn and the ink chamber width is set to 36 xm at the rear end where the conductive resin 10 is filled with respect to the depth of the ink chamber 22 of 100 m.
- the dimensions of the exposed surface of the conductive resin 10 in the upper portion 29 of the conductive resin 10 are 36 m in width and 600 ⁇ in length. In the connection, if the length is 1 10 or more, a connection area of 3 960 2 1 T 12 or more can be secured, and as described in Embodiment 1, low-cost and stable electric connection can be performed. it can.
- two actuator driving electrodes 30, 30 are formed to face each other in the ink chamber 22, and through the filled conductive resin 10, In one ink chamber 22, two electrodes are in a conductive state.
- a nozzle plate 41 having fine nozzles 40 is adhered to the ink ejection surface of the actuator 28, and a cover member 45 is provided above the rear end of the actuator 28.
- a preformed ink supply port 44 is provided.
- the ink chambers 22 arranged in an array are partitioned by an ink chamber partition made of a piezoelectric material, and the upper half of each partition (50 / m depth near the rear end of the actuator). Electrodes are formed on the entire surface of the partition wall up to the bottom of the groove because of the shallow groove).
- the upper surface of the rear end of the actuator unit where the conductive resin 10 is integrated as one external connection electrode 9 A voltage is applied to the conductive resin electrode 12 exposed to the outside, and an opposite-phase voltage is applied to the electrodes facing each other on the front and back of the ink chamber partition 32, so that the partition 32 forms the ink chamber electrode at the boundary. Drive in share mode to bend.
- the ink-jet head of the present embodiment has a card lead 52 formed on a TAB tape 51 electrically connected to a driving IC 50 and a rear end of a box 28.
- the conductive resin electrode 12 on the upper surface can be electrically and mechanically connected via an ACF 53 or the like to form an inkjet head module.
- a groove having a width of 36 m is formed on a piezoelectric material wafer 75 by using a dicing blade 60 of a dicer.
- the portion to be filled with the conductive resin 10 later is made shallower than the portion of the ink chamber 22 so that the filling of the conductive resin 10 becomes good, Since a margin in the resin 10 filling step can be increased, production management is facilitated, and an improvement in production yield can be realized.
- the metal which becomes the electrode material such as A1 or Cu is diagonally obliquely upward from the longitudinal direction of the ink chamber 22. Oblique deposition.
- a metal electrode 76 is formed on the surface of the ink chamber partition 32, and due to the shadowing effect of each ink chamber partition 32, The metal film 76 is formed up to about 12 in the depth direction of the ink chamber 22, and the electrode is formed to the bottom of the groove in the shallow groove region where the conductive resin 10 is filled later.
- the electrodes 30 and 31 facing each other in the ink chamber 22 are the driving electrodes.
- a liquid conductive resin is applied in a direction perpendicular to the ink chamber 22 of the piezoelectric material wafer 75 by using a dispenser 61 to have a width of 2.0 mm.
- the ink is applied and supplied on the ink chamber 22 and the ink chamber partition 32 in a single character, and then the conductive resin 10 is cured.
- a relief portion 78 was formed so as not to cover all of the conductive resin 10 which becomes the conductive resin electrode 12 after passing through the hole 77 for the ink supply port 44 and the filled upper surface 29.
- a force bar 79 made of a piezoelectric material is prepared. This force base wafer 79 later seals the upper part of the ink chamber 22 when it is fragmented into an ink jet head, and removes the conductive resin electrode 12 at the rear end of the actuator. It becomes a cover member that seals the rear end.
- the ink chamber wafer 75 having the ink chamber array and the cover wafer 79 are bonded together using a commercially available adhesive.
- a part of the upper surface 29 filled with the conductive resin 10 inside the rear end portion of the ink chamber is sealed with the cover wafer 79 (cover member 45) to seal the ink chamber 22.
- ink is supplied from the through hole 7 7 (ink supply port 4 4) of the cover member 4 5, and the ink is bonded between the cover member 4 5 and the top surface 29 filled with the conductive resin 10.
- the upper surface of the conductive resin 10 excluding the part 2 will be connected to the external circuit electrode later in the part 9 Then, avoid the conductive resin electrode 12 with the dicing line shown by the broken line in Fig. 12B.
- Dicing removes only the Zardari 78 part set at the position set right, and opens the part immediately above the electrode 12 for external circuit connection, and at the same time, the Zardari 78 part of the bar wafer 79 and the ink chamber indicated by the thick broken line part. 2 At the center of the ink chamber drive section where the top of The service one dicing da blade, shredding into individual Akuchiyue Isseki 2 8, Akuchiyue Isseki 2 8 is completed formed.
- the external circuit connection electrode of the ink jet head is formed on the exposed surface of the conductive material filling upper portion filled in the ink chamber array.
- the material cost can be reduced, the driving frequency can be increased by reducing the capacitance, and high-speed printing can be performed.
- the driving voltage can be reduced, and the withstand voltage of the driving IC can be reduced. As a result, it is possible to reduce the cost of the driving IC and the driving power consumption.
- an ink jet head is at least as follows. It can be manufactured by a manufacturing method including the following steps.
- the ink jet head manufactured by such a manufacturing method uses an exposed surface of the conductive material, which is filled with the conductive material filled in the ink chamber array, as an electrode for connecting an external circuit.
- a desired electrode area can be secured in the longitudinal direction. Therefore, even in the case of a narrow-pitch ink jet head, electrical connection to an external circuit can be made with a large-area connection electrode, and a stable and low connection resistance is obtained. Can be connected with a stake. As a result, excellent environmental reliability can be ensured, and a high-frequency and stable drive waveform can be sent to the drive electrode, thereby enabling high-speed printing.
- the ink chamber electrode was conventionally drawn out of the ink chamber to mount the ink chamber electrode.However, the necessity is eliminated, and almost all parts other than the active area of Actu Yue are eliminated. Therefore, it is possible to reduce the size of the factory and reduce material costs.
- the capacitance of the ink jet head is reduced due to a significant decrease in portions other than the active area.
- the driving frequency can be increased, and high-speed printing can be realized.
- the drive voltage can be reduced, the withstand voltage of the drive IC can be reduced, and the drive IC cost and drive power consumption can be reduced.
- the external circuit connection electrode of the filled conductive material has a larger cross-sectional area than the ink chamber cross-sectional area, even if it is a narrow pitch ink jet head, it has a large area to electrically connect to the external circuit electrode. Connections can be made and stable connections can be made with low connection resistance. As a result, excellent environmental reliability can be ensured, and a high-frequency and stable driving waveform can be sent to the driving electrode, thereby enabling high-speed printing.
- connection between the ink jet head and the external circuit is made via the anisotropic conductive material and the exposed surface of the conductive material which is the electrode for connecting the external circuit to the external circuit.
- the circuit is electrically connected with at least five or more conductive particles of an anisotropic conductive material.
- connection portion of the inkjet head module to the external circuit is larger than the area of the external circuit connection electrode of the ink jet head, a large margin for connection alignment can be ensured.
- the entire connection electrode can be stably used for electrical connection.
- productivity can be improved, and a stable external circuit connection with low connection resistance and little variation can be performed.
- excellent environmental reliability can be ensured, and a high-frequency and stable driving waveform can be sent to the driving electrodes, thereby enabling high-speed printing.
- the external circuit connection electrode for connecting to the external circuit has a cross-sectional area larger than the ink chamber cross-sectional area in the groove width direction.
- the conductive material filled in the groove leading to the ink chamber is formed on the exposed surface at the rear end of the head.Therefore, conventionally, the conductive material was drawn out of the ink chamber in order to mount the ink chamber electrode. However, there is no need to do so, and parts other than the active area of the factory are almost unnecessary, so that the factory can be made more compact and material costs can be reduced.
- the capacitance can be reduced. Since the drive frequency can be increased by reducing the capacitance, high-speed printing is possible. Further, since the driving voltage can be reduced and the withstand voltage of the driving IC can be reduced, the driving IC cost and the driving power consumption can be reduced.
- the method includes the steps of forming a deep groove formed partially deeply and filling the deep groove with a conductive material
- the external circuit connection electrode of the conductive material filled in the deep groove is Since it has a larger cross-sectional area than the ink chamber cross-sectional area, it is possible to make more stable electrical connection with external circuits to be performed later. Electrical connection can be made.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Particle Formation And Scattering Control In Inkjet Printers (AREA)
Abstract
Description
Claims
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US10/520,856 US7290868B2 (en) | 2003-03-11 | 2004-03-10 | Inkjet head with formed external circuit connecting electrodes |
| GB0501098A GB2406830B (en) | 2003-03-11 | 2004-03-10 | Inkjet head, inkjet head module, and method of producing the inkjet head |
| SE0402689A SE527852C2 (sv) | 2003-03-11 | 2004-11-05 | Bläckstrålehuvud, bläckstrålehuvudmodul och metod för tillverkning av densamma |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003065708A JP4077344B2 (ja) | 2003-03-11 | 2003-03-11 | インクジェットヘッド、インクジェットヘッドモジュール及びその製造方法 |
| JP2003-065708 | 2003-03-11 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2004080720A1 true WO2004080720A1 (ja) | 2004-09-23 |
Family
ID=32984509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2004/003054 Ceased WO2004080720A1 (ja) | 2003-03-11 | 2004-03-10 | インクジェットヘッド、インクジェットヘッドモジュール及びその製造方法 |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US7290868B2 (ja) |
| JP (1) | JP4077344B2 (ja) |
| GB (1) | GB2406830B (ja) |
| SE (1) | SE527852C2 (ja) |
| WO (1) | WO2004080720A1 (ja) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5354720B2 (ja) * | 2008-12-08 | 2013-11-27 | エスアイアイ・プリンテック株式会社 | 液体噴射ヘッドの製造方法 |
| KR101288257B1 (ko) * | 2011-09-30 | 2013-07-26 | 삼성전기주식회사 | 미세토출장치의 구동부 제작방법 |
| US9409394B2 (en) * | 2013-05-31 | 2016-08-09 | Stmicroelectronics, Inc. | Method of making inkjet print heads by filling residual slotted recesses and related devices |
| JP6371639B2 (ja) * | 2014-08-28 | 2018-08-08 | セイコーインスツル株式会社 | 液体噴射ヘッド及び液体噴射装置 |
| JP6869675B2 (ja) * | 2016-09-23 | 2021-05-12 | 東芝テック株式会社 | インクジェットヘッドおよびインクジェットヘッドの製造方法 |
| JP2018122554A (ja) * | 2017-02-03 | 2018-08-09 | エスアイアイ・プリンテック株式会社 | 部材、液体噴射ヘッドチップ、液体噴射ヘッド、液体噴射装置および切断方法 |
| US11247459B2 (en) * | 2019-07-22 | 2022-02-15 | Canon Kabushiki Kaisha | Liquid charging apparatus, liquid charging method, and manufacturing method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04307254A (ja) * | 1991-04-05 | 1992-10-29 | Seiko Epson Corp | インクジェットプリントヘッドとそれを用いたインクジェットプリント装置、及びインクジェットプリントヘッドの製造方法 |
| US20020080214A1 (en) * | 2000-12-18 | 2002-06-27 | Kaoru Higuchi | Ink jet head and fabrication method thereof |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3139511B2 (ja) * | 1990-11-09 | 2001-03-05 | セイコーエプソン株式会社 | インクジェット記録ヘッド |
| JP3087315B2 (ja) | 1991-02-13 | 2000-09-11 | セイコーエプソン株式会社 | インクジェットヘッド及びその製造方法 |
| JPH08169110A (ja) * | 1994-12-20 | 1996-07-02 | Sharp Corp | インクジェットヘッド |
| JPH0985946A (ja) * | 1995-09-25 | 1997-03-31 | Sharp Corp | インクジェットヘッド及びその製造方法 |
| JPH0994954A (ja) | 1995-09-28 | 1997-04-08 | Seikosha Co Ltd | インクジェット記録装置 |
| KR100764323B1 (ko) * | 1998-02-18 | 2007-10-05 | 소니 가부시끼 가이샤 | 압전 작동기와 그 제조 방법 및 잉크젯 프린트헤드 |
| JP2002178518A (ja) | 2000-12-18 | 2002-06-26 | Sharp Corp | インクジェットヘッドの電極接続構造及び製造方法 |
| JP3693923B2 (ja) | 2001-01-12 | 2005-09-14 | シャープ株式会社 | 液滴噴射装置 |
| JP2002210989A (ja) * | 2001-01-23 | 2002-07-31 | Sharp Corp | インクジェットヘッド及びその製造方法 |
| EP1465773A1 (en) * | 2002-01-16 | 2004-10-13 | Xaar Technology Limited | Droplet deposition apparatus |
| JP4353670B2 (ja) * | 2002-01-23 | 2009-10-28 | シャープ株式会社 | インクジェットヘッドの製造方法 |
| JP2003246058A (ja) | 2002-02-27 | 2003-09-02 | Sharp Corp | インクジェットヘッド |
| JP4223247B2 (ja) * | 2002-08-12 | 2009-02-12 | シャープ株式会社 | 有機絶縁膜の製造方法及びインクジェットヘッド |
-
2003
- 2003-03-11 JP JP2003065708A patent/JP4077344B2/ja not_active Expired - Fee Related
-
2004
- 2004-03-10 WO PCT/JP2004/003054 patent/WO2004080720A1/ja not_active Ceased
- 2004-03-10 US US10/520,856 patent/US7290868B2/en not_active Expired - Fee Related
- 2004-03-10 GB GB0501098A patent/GB2406830B/en not_active Expired - Fee Related
- 2004-11-05 SE SE0402689A patent/SE527852C2/sv not_active IP Right Cessation
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04307254A (ja) * | 1991-04-05 | 1992-10-29 | Seiko Epson Corp | インクジェットプリントヘッドとそれを用いたインクジェットプリント装置、及びインクジェットプリントヘッドの製造方法 |
| US20020080214A1 (en) * | 2000-12-18 | 2002-06-27 | Kaoru Higuchi | Ink jet head and fabrication method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| SE0402689L (sv) | 2004-11-05 |
| SE527852C2 (sv) | 2006-06-20 |
| GB0501098D0 (en) | 2005-02-23 |
| JP4077344B2 (ja) | 2008-04-16 |
| JP2004268526A (ja) | 2004-09-30 |
| US7290868B2 (en) | 2007-11-06 |
| GB2406830B (en) | 2005-12-14 |
| US20060071972A1 (en) | 2006-04-06 |
| GB2406830A (en) | 2005-04-13 |
| SE0402689D0 (sv) | 2004-11-05 |
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