WO2009125748A1 - 共振器の支持装置 - Google Patents
共振器の支持装置 Download PDFInfo
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- WO2009125748A1 WO2009125748A1 PCT/JP2009/057068 JP2009057068W WO2009125748A1 WO 2009125748 A1 WO2009125748 A1 WO 2009125748A1 JP 2009057068 W JP2009057068 W JP 2009057068W WO 2009125748 A1 WO2009125748 A1 WO 2009125748A1
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Definitions
- the present invention relates to a resonator support device that supports a resonator that resonates by ultrasonic vibration of a vibrator.
- an ultrasonic vibration bonding apparatus that joins objects by applying ultrasonic vibration to a plurality of superimposed objects, or cutting with a cutter, etc.
- an ultrasonic cutting apparatus that cuts an object while applying ultrasonic vibration to a tool
- an ultrasonic polishing apparatus that polishes an object while applying ultrasonic vibration to a polishing tool such as a file.
- Such an apparatus using ultrasonic vibration generally includes a resonator having a vibrator, oscillates from the vibrator in accordance with the natural frequency of the resonator, and amplifies the vibration by the resonator.
- the ultrasonic vibration is efficiently applied to the object.
- the natural frequency of the resonator easily varies depending on the support member and the support method that support the resonator. Therefore, depending on the support member and the support method, the natural frequency of the resonator may be greatly shifted, and the resonator may not vibrate at a predetermined frequency.
- Another problem is that abnormal vibration is generated in a direction different from the vibration direction of the resonator, and it is difficult to efficiently apply ultrasonic vibration to the object.
- various techniques have been improved for supporting the resonator so that the resonator vibrates stably at a predetermined frequency.
- the resonator has a convex portion protruding at a position corresponding to the minimum vibration amplitude point (nodal point) on the outer periphery of the resonator on the center axis of the resonator.
- the minimum vibration amplitude point is a node of a standing wave generated in the resonator, and is a point where expansion and contraction does not occur in the central axis direction of the resonator, which is a vibration transmission direction.
- the convex portion is clamped with a support member and a clamping member, and mechanically and firmly clamped, thereby applying a predetermined ultrasonic vibration to the object to perform a joining operation.
- the resonator includes a thin plate-like rib on the outer periphery of the nodal point resonator as a fixed portion of the resonator. Then, by supporting the rib, the abnormal vibration different from the vibration direction of the resonator is absorbed by the rib, and a predetermined ultrasonic vibration is applied to the object to perform the joining operation.
- JP 11-265914 A paragraphs [0017], [0022], [0023], FIG. 3)
- the resonator fixing portion described in Patent Document 2 is a thin plate-like rib, there is a problem that the strength is weak and it is easily broken. Therefore, it is not easy to finely adjust the support position while oscillating the vibrator. There is also a problem that it is difficult to support the resonator at an arbitrary position other than the nodal point.
- the present invention provides a support device for a resonator that can support a resonator at an arbitrary position, can stably vibrate at a predetermined frequency, and can efficiently apply ultrasonic vibration to an object.
- the purpose is to do.
- a resonator support device includes a resonator that resonates by ultrasonic vibration of a vibrator, a supported portion formed on an outer peripheral surface of the resonator, and the supported device. And supporting means for supporting the resonator so that the natural frequency of the resonator does not shift by engaging with the supporting portion, and the supporting means is made of a material having a logarithmic attenuation factor larger than 0.01 and smaller than 1.
- the support member is provided at a location where the support member comes into contact with the resonator (claim 1).
- the resonator support device includes a resonator that resonates due to ultrasonic vibration of a vibrator, a supported portion formed on an outer peripheral surface of the resonator, and the engaged portion.
- the resonator support device further includes a stage for placing an object to which ultrasonic vibration is applied below the resonator, and the stage places at least the object to be placed.
- the mounting surface is provided with a vibration transmission restraining holding member made of a material having a logarithmic attenuation ratio larger than 0.01 and smaller than 1. (Claim 3).
- the resonator support device further includes a stage on which the object is placed below the resonator, and the stage has a sound velocity of at least 5900 m on a placement surface on which the object is placed.
- the vibration transmission restraining holding member made of a material larger than / s is provided (claim 4).
- the abnormal vibration of the resonator is quickly dissipated, and when the material has a sound speed of more than 5900 m / s, the abnormal vibration of the resonator can be effectively suppressed. (See FIGS. 5 and 7).
- the support means for engaging the supported portion and supporting the resonator includes the support member made of a material having a logarithmic attenuation factor larger than 0.01 and smaller than 1, so that resonance occurs.
- the vibration absorption speed is fast at the location in contact with the resonator, and the resonator can be stably vibrated with the desired vibration while the abnormal vibration different from the vibration direction of the resonator is accurately absorbed by the support member. Therefore, ultrasonic vibration can be efficiently applied to the object.
- the position where the resonator is supported is not limited to the nodal point and can be supported at any position, so that the device configuration can be changed. Furthermore, since the size of the support means can be reduced or the number of support means can be reduced, the apparatus can be reduced in size and simplified.
- the support means for engaging the supported portion and supporting the resonator includes the support member made of a material having a sound velocity of more than 5900 m / s, and therefore, the portion in contact with the resonator. Therefore, the resonator can be stably oscillated with a desired vibration while the vibration transmission speed is fast and abnormal vibration different from the vibration direction of the resonator is accurately dissipated by the support member. Therefore, ultrasonic vibration can be efficiently applied to the object. Further, the position where the resonator is supported is not limited to the nodal point and can be supported at any position, so that the device configuration can be changed. Furthermore, since the size of the support means can be reduced or the number of support means can be reduced, the apparatus can be reduced in size and simplified.
- the stage on which the object is placed is for suppressing vibration transmission made of a material having a logarithmic attenuation ratio larger than 0.01 and smaller than 1 on at least the placement surface on which the object is placed. Since the holding member is provided, the resonator can be stably vibrated with the desired vibration by the support member on the support means side, and the ultrasonic vibration transmitted from the resonator to the stage via the object is vibrated. It can be quickly absorbed by the transmission restraining holding member. Accordingly, the vibration of the stage is suppressed, and the relative vibration amplitude of the object held on the stage and the resonator, or the object held on the stage and the object held on the resonator is increased. It is possible to efficiently apply ultrasonic vibration.
- the stage on which the object is placed includes at least a vibration transmission restraining holding member made of a material having a sound speed greater than 5900 m / s on the placement surface on which the object is placed.
- the resonator can be stably vibrated with a desired vibration by the support member on the support means described above, and the ultrasonic vibration transmitted from the resonator to the stage through the object can be suppressed by the vibration suppression holding member. Can dissipate quickly. Therefore, the vibration of the stage is suppressed, and the relative vibration amplitude of the object held on the stage and the resonator or the object held on the stage and the object held on the resonator is increased. It is possible to efficiently apply ultrasonic vibration to the object.
- FIG. 1 is a schematic configuration diagram of an ultrasonic vibration bonding apparatus according to a first embodiment of the present invention. It is the schematic of the resonator in 1st Embodiment.
- FIGS. 3A and 3B are schematic views showing a state in which the resonator shown in FIG. 2 is supported by support means, where FIG. 3A is a front view and FIG. 2B is a cross-sectional view taken along line AA shown in FIG.
- It is a schematic block diagram of the experimental apparatus for measuring the vibration amplitude of a support means. It is a measurement result of the vibration amplitude in the predetermined position of a support means. It is a figure which shows the logarithmic attenuation factor of each material.
- FIG. 1 is a schematic configuration diagram of an embodiment of an ultrasonic vibration bonding apparatus incorporating a resonator support device according to the present invention
- FIG. 2 is a configuration diagram of a resonator included in the ultrasonic vibration bonding apparatus shown in FIG. .
- 3 is a configuration diagram of the resonator supported by the supporting means, where (a) is a front view, (b) is a right side view of (a), and is a view taken along line AA of the resonator.
- 4 is a schematic configuration diagram of an experimental apparatus for measuring the vibration amplitude of the support means
- FIG. 5 is a measurement result of vibration amplitude at a predetermined position of the support means
- FIG. 6 is a graph showing the logarithmic attenuation factor of each material.
- FIG. 7 is a diagram showing the sound speed of each material.
- an ultrasonic vibration bonding apparatus incorporating a resonator support apparatus according to the present invention will be described as an example.
- the chip 23 having the metal fusion bumps 23a made of lead-tin solder on the joining surface of the semiconductor that is one of the joining objects, and the substrate 24 having the metal fusion bumps 24a that are the other joining objects. Are joined by ultrasonic vibration.
- the chip 23 is held by the holding means 40 of the resonator 7 described later, and the substrate 24 is placed on the stage 10 described later.
- the ultrasonic vibration bonding apparatus includes a bonding mechanism 27, a mounting mechanism 28 having a stage 10 and a stage table 12, a position recognition unit 29, a transport unit 30, and a control device. 31.
- the joining mechanism 27 includes a vertical drive mechanism 25 and a head portion 26.
- the vertical drive mechanism 25 is vertically moved while the resonator support portion 6 is guided by the vertical guide 3 by the vertical drive motor 1 and the bolt / nut mechanism 2. It is configured to be able to move.
- the joining mechanism 27 is coupled to the frame 34, and the frame 34 is connected to the gantry 35 by the four support columns 13 disposed so as to surround the periphery of the pressure center of the head portion 26. A part of the support column 13 and the frame 34 is not shown.
- the resonator support section 6 is guided in the vertical direction by the head escape guide 5 and is connected to the bolt / nut mechanism 2 while being pulled by the own weight counter 4 for canceling the own weight.
- a head portion 26 having a resonator 7 is coupled to the resonator support portion 6.
- a pressure sensor 32 is disposed on the resonator support 6 so that the pressure applied to the object (chip 23, substrate 24, etc.) sandwiched between the resonator 7 and the stage 10 can be detected. It is configured. Therefore, by feeding back the pressure applied to the object detected by the pressure sensor 32 to the control device 31, the vertical drive mechanism 25 is controlled based on the feedback value, thereby controlling the pressure applied to the object. it can. Further, the resonator support section 6 is provided with a resonator section height detecting means 36 and can detect the height of the head section 26.
- the head unit 26 disposed on the resonator support 6 includes a resonator 7, a vibrator 8, a holding unit 40 that holds the chip 23 by suction, a base 20, a first clamping unit 21, and a second clamping unit 22.
- the support means 44 which consists of is provided.
- the resonator 7 is configured with a length of one wavelength of the resonance frequency so that the substantially center position f2 of the resonator 7 and both end positions f0 and f4 are the maximum amplitude points. Yes.
- the positions f3 and f1 that are a quarter wavelength away from the maximum amplitude point correspond to the first and second minimum amplitude points, respectively.
- the resonator 7 has a cylindrical shape with a circular cross section viewed from the position f4.
- a vibrator 8 is disposed at a position f0 of the resonator 7 so as to be coaxial with the central axis of the resonator 7, and the vibrator 8 is controlled by the control device 31 to generate ultrasonic vibrations. Thereby, the resonator 7 vibrates in the central axis direction.
- a holding means 40 for holding the chip 23 as an object is disposed on the lower surface of the outer periphery of the resonator 7 at the position f2, which is the maximum amplitude point of the resonator 7.
- the holding means 40 is made of, for example, a material such as Ni, Cu, or Ag, and is bonded to the resonator 7 with a thermosetting resin or the like. Further, it may be formed by cutting directly from the resonator 7. Furthermore, the holding means 40 may be made of a material other than metal, such as cemented carbide tungsten carbide, ceramics, diamond, or the like, and may be bonded to the resonator 7 with a metal brazing material such as Ni, Cu, or Ag.
- the holding means 40 is provided with a holding mechanism (not shown) by vacuum suction as an example in order to hold the chip 23 which is an object.
- the holding mechanism may be configured to hold an object by electrostatic adsorption, a mechanical chuck, or the like, and is not limited to this, and is configured to directly attach the object to the holding means 40 and hold it. May be.
- the outer periphery of the resonator 7 is formed in a concave shape to support the resonator 7.
- the 1st supported part 41 and the 2nd supported part 42 for doing are comprised.
- the first supported portion 41 and the second supported portion 42 have an octagonal cross-sectional shape when cut in a cross section perpendicular to the central axis of the resonator 7.
- the cross-sectional shapes of the first supported portion 41 and the second supported portion 42 are not limited to octagons, and may be circular or other polygonal shapes.
- the resonator 7 is supported by the support means 44 in the first supported portion 41 and the second supported portion 42.
- the support means 44 includes a base 20, a first clamp means 21 and a second clamp means 22, and the first clamp means 21 and the second clamp means 22 are formed by a support member.
- the first clamp means 21 includes a support member at least at a portion where the first clamp means 21 contacts the first supported portion 41 and at least a portion where the second clamp means 22 contacts the second supported portion 42.
- the entirety of the first clamp means 21 and the second clamp means 22 may be formed of the same material as the support member. The material of this support member will be described in detail later.
- the upper member 22 a and the lower member 22 b of the second clamping means 22 supported by the base 20 are fitted into the second supported portion 42, and the upper member 22 a and the lower member 22 are The member 22b is fixed and the second supported portion 42 is sandwiched.
- the upper member 21a and the lower member 21b of the first clamp means 21 supported by the base 20 are fitted into the first supported portion 41, and the upper member 21a and the lower member 21b are fixed by bolts 43.
- the first supported portion 41 is sandwiched.
- the base 20 is fixed to the resonator support 6 and is configured to apply a pressing force by the vertical drive mechanism 25 to the chip 23 and the substrate 24.
- the resonator 7 is configured to be rotatable about the central axis of the resonator 7 by loosening the bolt 43.
- the holding means 40 is replaced by loosening the bolt 43 and rotating the resonator 7 about the central axis of the resonator 7. can do.
- the method for fixing the resonator 7 to the first clamp means 21 and the second clamp means 22 is not limited to the bolt 43, and any method may be used. It may be a clamp mechanism or a clamp mechanism that can be attached with one touch.
- the position for supporting the resonator 7 is not limited to the minimum amplitude points f1 and f3, and may be an arbitrary position of the resonator 7.
- the 1st to-be-supported part 41 and the 2nd to-be-supported part 42 may be formed not only in a concave shape but in convex shape, The shape is arbitrary.
- the arrangement position of the holding means 40 is not limited to the maximum amplitude point f2, but may be another maximum amplitude point or any position other than the maximum amplitude point.
- the mounting mechanism 28 includes a stage 10 and a stage table 12.
- the stage 10 includes a holding mechanism (not shown) for holding the substrate 24.
- a holding mechanism of the stage 10 a mechanism using a holding mechanism by vacuum suction is used.
- the holding mechanism may be one that utilizes electrostatic attraction, or the substrate 24 may be simply placed on another holding mechanism or the stage 10.
- stage table 12 includes a moving shaft that can be moved in parallel and rotationally, and is configured to move so as to adjust the position of the substrate 24 relative to the chip 23.
- the position recognition unit 29 is inserted between the chip 23 and the substrate 24 arranged to face each other, and the upper and lower mark recognition means 14 for recognizing the alignment marks for position recognition of the upper and lower chips 23 and the substrate 24, the chip 23, An amplitude detector 33 for detecting the amplitude of the substrate 24 and the resonator 7 and a recognition means moving table 15 for moving the recognition means 14 and the amplitude detector 33 horizontally and / or up and down are provided.
- the transport unit 30 includes a chip supply device 16 and a chip tray 17 that transport the chips 23, and a substrate transport device 18 and a substrate transport conveyor 19 that transport the substrate 24.
- the control device 31 controls the ultrasonic vibration energy obtained from the pressure applied to the head unit 26 and the voltage value and / or current value applied to the vibrator 8. Further, the control device 31 includes an operation panel (not shown) for controlling the entire ultrasonic vibration bonding apparatus, and is based on a detection signal of the height position of the head portion 26 by the resonator height detection means 36. The vertical drive mechanism 25 can be controlled to adjust the height of the head portion 26 in the direction of arrow Z in FIG.
- FIG. 4 is a schematic configuration diagram of the experimental apparatus used in this experiment.
- the vibration amplitude was measured.
- support members 51 and 52 corresponding to the first and second clamp means 21 and 22 are installed on the upper surface of the base 50, and the first supported portion 41 of the resonator 7.
- the support members 51 and 52 were inserted into the second supported portion 42 and the resonator 7 was supported.
- the first supported portion 41 and the second supported portion are arranged at the minimum vibration amplitude point of the resonator 7 (corresponding to the positions f1 and f3 in FIG. 2) so as to absorb abnormal vibration different from the vibration direction of the resonator 7.
- the length measuring means 55 is installed so as to be movable in the vertical direction by a drive mechanism (not shown), and moved to a desired measurement position so that the vibration amplitude of the support member 51 can be measured.
- the resonator 7 is supported by using various materials as the support members 51 and 52, and the resonator 7 is resonated, as shown in FIG.
- the vibration amplitude of the support member 51 at the position E close to the part D and the base was measured.
- FIG. 5 shows, as an example of the experimental results described above, an austenitic stainless steel (SUS304), pure Ti, a Ti alloy (6Al-4V), an Al alloy (duralumin), and a Mn—Cu alloy that is a type of twin type damping alloy.
- FIG. 6 is a diagram showing the vibration amplitude when Daido Special Steel Co., Ltd. product D2052 which is a Mn—Cu—Ni—Fe alloy further added with Ni, Fe or the like is used as the supporting means 51, 52.
- the support member 51 when the support member 51 is SUS304, the support member 51 vibrates with the vibration of the resonator 7 at a position C close to the resonator 7, so that the vibration amplitude is large.
- the vibration amplitude is small at a position E close to.
- Pure Ti and Ti alloy show the same tendency as SUS304, but the vibration amplitude at the position C near the resonator 7 is smaller than that of SUS304.
- the vibration amplitude is small at the position C near the resonator 7 despite being close to the resonator 7. It can also be seen that the vibration amplitude hardly changes through the positions C, D, and E. Therefore, it can be seen that duralumin and the Mn—Cu alloy have a very large effect of suppressing the abnormal vibration of the resonator 7.
- the material shown in FIG. 5 is pure Ti due to the feeling of use such as the change in the resonance frequency of the resonator and the presence or absence of abnormal noise.
- Ti alloy, duralumin, and Mn—Cu alloy were usable materials.
- the logarithmic attenuation rate is a characteristic indicating the absorption rate of vibration. A material having a higher logarithmic attenuation rate is less likely to transmit vibration and is quickly absorbed.
- FIG. 6 shows logarithmic decay rates for various materials.
- the Mn—Cu alloy obtained with the smallest vibration amplitude in FIG. 5 corresponds to the silencer in FIG. 6 and has a logarithmic attenuation factor of 0.7 to 0.8. Therefore, it is considered that the abnormal vibration generated in the resonator 7 is quickly absorbed by the Mn—Cu alloy, so that the abnormal vibration of the resonator 7 is effectively suppressed.
- flake graphite cast iron when comparing flake graphite cast iron and spheroidal graphite cast iron, it is generally known that flake graphite cast iron is superior to spheroidal graphite cast iron as a vibration suppressing material. Further, the ferritic stainless steel shown in FIG. 6 has a vibration suppression effect 50 times that of austenitic stainless steel, and is also known to be excellent as a vibration suppression material.
- a material having a logarithmic attenuation rate larger than 0.01 and smaller than 1 is suitable as a material for the support member.
- the material is preferably 0.1 or more.
- the duralumin and Ti alloys which are Al alloys, are excellent as vibration suppression materials in the experimental results shown in FIG. The result is obtained. Therefore, next, focusing on the sound speed of each material, the selection criteria for the material of the support member of the resonator 7 will be considered.
- the speed of sound is the speed at which vibration is transmitted, and the greater the speed of sound, the faster the vibration is transmitted through the material and is dissipated.
- FIG. 7 shows the speed of sound for various materials. As shown in FIG. 7, the sound speed of duralumin obtained as a result of the small vibration amplitude in FIG. 5 is 6320 m / s, and the Ti alloy is 6500 m / s. The sound speed of austenitic stainless steel is 5790 m / s. Therefore, it is considered that the abnormal vibration of the resonator 7 is effectively suppressed since the abnormal vibration of the resonator 7 is quickly dissipated as the sound speed increases.
- pure Ti with a sound speed of 5990 m / s and iron with a 5950 m / s can be used as vibration suppression materials from the actual feeling of use, etc. Therefore, a material with a sound speed greater than 5900 m / s is used for the support member. It is considered suitable as a material. In practice, the material is preferably 6000 m / s or more.
- the first clamping means 21 and the second clamping means 22 are made of a twin-type vibration damping alloy (for example, the above-described Mn—Cu alloy) whose logarithmic attenuation rate and sound velocity both satisfy the above-described conditions.
- the resonator 7 is supported by forming the whole and inserting these into the first supported portion 41 and the second supported portion 42 of the resonator 7.
- a twin-type vibration damping alloy is a material in which twins are generated inside the material when a load is applied, and the size of the twins changes or moves according to the magnitude of the load.
- the kinetic energy is converted into thermal energy by the generation and movement of twins and the load is absorbed
- the vibration is absorbed inside the material and the vibration is transmitted. Is suppressed. Therefore, it is used in various fields as a material for suppressing vibration.
- the ultrasonic vibration bonding apparatus uses the ultrasonic vibration of the resonator, it is desired to suppress abnormal vibration or the like different from the vibration direction of the resonator 7, but the resonator 7 itself is predetermined. It is necessary to vibrate stably at a frequency of. Therefore, since it is presumed that the vibration of the resonator 7 itself is suppressed when the twin type vibration damping alloy is used as the support member of the resonator 7, the twin type vibration damping alloy has conventionally been supported by the resonator 7. It was not used as a member.
- twin type damping alloy when used as a support member for the resonator 7, the vibration of the resonator 7 itself is suppressed while suppressing the abnormal vibration of the resonator 7 and the like. It was found that it can be stabilized at a predetermined frequency. This is presumably because twin-type vibration-damping alloys generate minute twins one after another in the material following the frequency of vibration in the so-called ultrasonic frequency band. Therefore, it can be said that the twin-type damping alloy is suitable as a support member for the resonator 7 using ultrasonic waves.
- the first clamping means 21 and the second clamping means 22 are made of a Mn—Cu alloy, which is a kind of twin-type damping alloy, and a Mn—Cu—Ni—Fe alloy further added with Ni, Fe or the like. It is good to form.
- the material of the support member is not limited to the twin type damping alloy, and any material may be used as long as the material has a logarithmic attenuation ratio in the range of 0.01 to 1 or a sound speed greater than 5900 m / s. May be used. Moreover, as long as the support means 44 of the above-mentioned material is contacting the both supported parts 41 and 42 of the resonator 7, any shape and size of the support means 44 may be used.
- the chip 23 and the substrate 24, which are objects, are installed.
- the chip 23 is supplied from the chip tray 17 to the holding means 40 of the resonator 7 by the chip supply device 16 and is sucked and held.
- the substrate 24 is supplied from the substrate transfer conveyor 19 to the stage 10 by the substrate transfer device 18 and held by suction.
- the upper and lower mark recognizing means 14 is inserted between the chip 23 and the substrate 24, which are held facing each other so that the respective bonding surfaces face each other, by the recognition means moving table 15, and each of the chips 23 and the substrate 24 held facing each other.
- the position of the alignment mark for alignment is detected by the upper and lower mark recognition means 14. Thereafter, the position of the chip 23 and the substrate 24 is adjusted by moving the stage table 12 in parallel and rotating with the position of the chip 23 as a reference, thereby moving the position of the substrate 24.
- the upper / lower mark recognizing means 14 is retracted by the recognizing means moving table 15 in a state where the joining positions of the chip 23 and the substrate 24 are aligned (the positions of the metal fusion bumps 23a, 24a are aligned).
- the head unit 26 starts to descend by the vertical drive mechanism 25, and the chip 23 and the substrate 24 are brought close to each other.
- the metal melt bumps 23 a of the chip 23 and the metal melt bumps 24 a of the substrate 24 come into contact with each other, the chip 23 and the substrate 24 are sandwiched between the resonator 7 and the stage 10 based on a detection signal from the pressure sensor 32. Detected.
- the vertical drive motor 1 installed in the vertical drive mechanism 25 is controlled by the control device 31, a predetermined pressure is applied to the chip 23 and the substrate 24, and ultrasonic vibration bonding is started.
- control device 31 monitors and controls the ultrasonic vibration energy obtained from the current value and the voltage value applied to the vibrator 8, the resonance amplitude of the resonator 7, and the applied pressure, for example.
- the bonding surface of the chip 23 and the substrate 24 has small unevenness and a difference in the height of the plurality of metal fusion bumps 23a and 24a. Therefore, when the bonding area gradually increases in the process of bonding, The bonding force of the substrate 24 gradually increases, and the magnitude of the relative vibration amplitude of the chip 23 and the substrate 24 gradually decreases.
- the bonding force between the chip 23 and the substrate 24 becomes larger than the frictional force between the holding means 40 and the chip 23 holding the chip 23 or between the substrate 24 and the stage 10, and the holding means 40 and the chip 23, or between the substrate 24 and the stage 10, when a force greater than the maximum static frictional force acting between the holding means 40 and the chip 23 or between the substrate 24 and the stage 10 is applied, the holding means 40 and The frictional force acting between the chips 23 or between the substrate 24 and the stage 10 shifts from the static frictional force to the dynamic frictional force, and the holding means 40 and the chip 23 or the substrate 24 and the stage 10 are relatively vibrated. Therefore, the ultrasonic vibration transmitted from the resonator 7 (vibrator 8) is not sufficiently transmitted to the chip 23 and the substrate 24, and the bonding does not proceed.
- the relative vibration amplitude of the chip 23 and the substrate 24 decreases, so that the applied pressure is increased and the ultrasonic vibration energy is increased, and the relative relationship between the chip 23 and the substrate 24 is increased. Control is performed so that the magnitude of the vibration amplitude is maintained at a predetermined value.
- the controller 31 applies a predetermined pressure p and ultrasonic vibration energy e to advance the joining operation
- the amplitude detector 33 detects the relative vibration amplitude of the chip 23 and the substrate 24.
- the control device 31 performs control to increase the pressure and the ultrasonic vibration energy by ⁇ p and ⁇ e, respectively.
- ⁇ p and ⁇ e optimum values depending on the types of the chip 23 and the substrate 24 may be obtained in advance.
- control of the ultrasonic vibration energy includes, for example, the phase of the voltage and the current applied to the vibrator 8 being matched, and the magnitude of the vibration amplitude of the resonator 7 and the relative vibration amplitude of the chip 23 and the substrate 24.
- the current may be adjusted while holding the voltage of the vibrator 8 at a predetermined value so that the voltage is held at a predetermined value.
- the oscillation frequency of the vibrator 8 is set to 40 kHz, and the voltage applied to the vibrator 8 is set within the range of 0V to 10V. Further, although there are differences depending on the member, area, etc., as an example, the magnitude of the relative vibration amplitude between the chip 23 and the substrate 24 is about 0.1 ⁇ m to 0.5 ⁇ m.
- the joining area reaches the target value
- the joining is finished.
- the pressure, ultrasonic vibration energy and joining time necessary for joining the intended joining area are obtained in advance, and the time when the target value is reached is regarded as the end of joining.
- the adsorption of the chip 23 by the resonator 7 is released, and the return movement of the head unit 26 is performed. Thereafter, in a state where the chip 23 is mounted, the substrate 24 held on the stage 10 is discharged to the substrate transport conveyor 19 by the substrate transport device 18, and a series of joining operations is completed.
- both the first and second clamping means 21 and 22 of the supporting means 44 that engages with the first supported part 41 and the second supported part 42 to support the resonator 7.
- a support member made of a material having a logarithmic attenuation ratio larger than 0.01 and smaller than 1 at a portion in contact with the supported portions 41 and 42 the vibration absorption speed is high at a location in contact with the resonator 7, Abnormal vibration different from the vibration direction of the resonator 7 can be accurately absorbed by the support member.
- the resonator 7 can be stably vibrated with a desired vibration without shifting the natural frequency of the resonator.
- the logarithmic attenuation factor of the material of the support member is desirably 0.1 or more.
- first and second clamp means 21 and 22 of the support means 44 that engages with the first supported part 41 and the second supported part 42 to support the resonator 7 are in contact with the supported parts 41 and 42.
- the vibration transmission speed is high at a location in contact with the resonator 7 and abnormal vibration different from the vibration direction of the resonator is caused by the support member. It can be dissipated with high accuracy.
- the resonator 7 can be stably vibrated with a desired vibration without shifting the natural frequency of the resonator.
- the sound speed of the material of the support member is preferably 6000 m / s or more.
- the entire first and second clamping means 21 and 22 may be formed of the above-described materials.
- the ultrasonic vibration can be efficiently applied to the chip 23 and the substrate 24 by forming the support member with the above-described material, the position where the resonator 7 is supported is not limited to the nodal point, and any position But it becomes possible to support. Therefore, the position and shape of the support means 44 can be changed according to the size and shape of the chip 23 and the substrate 24, and the apparatus configuration can be changed. Further, since the size of the support means 44 can be reduced or the number of the support means 44 can be reduced, the apparatus can be reduced in size and simplified.
- FIG. 8 is a partial schematic configuration diagram of an ultrasonic vibration bonding apparatus according to a second embodiment of the present invention, where (a) is a front view and (b) is a partial cross-sectional view.
- FIG. 9 is a partial schematic configuration diagram of another example of the ultrasonic vibration bonding apparatus shown in FIG. 8, wherein (a) is a front view and (b) is a partial cross-sectional view.
- FIGS. 1 to 4 denote the same or corresponding elements.
- the ultrasonic vibration bonding apparatus shown in the present embodiment is different from the first embodiment in that the resonator 61 having the vibrator 60 rotates in a predetermined direction while vibrating, and the pressurization provided in the resonator 61.
- the point is that the substrates 63 and 64 as the objects are joined by the part 62.
- the head unit 26 of this embodiment includes a resonator 61 having a vibrator 60, a pressurizing unit 62, a base 65, a first clamping unit 66, and a second clamping unit 67.
- the support means 68 is provided.
- the support means 68 is the same as the support means 44 shown in 1st Embodiment, description is abbreviate
- the stage 70 is the same as the stage 10 of 1st Embodiment, description is abbreviate
- the resonator 61 has a first supported portion 71 and a second supported portion 72 formed on the outer periphery of the resonator 61, and the first and second clamping means 66 and 67 are respectively provided.
- Support members 73 and 74 are provided at portions that come into contact with the supported portions 71 and 72, and the supported portions 71 and 72 are supported by the support members 73 and 74.
- a ball bearing 78 including a spherical body 77 is provided between the inner peripheral portion 76a and the outer peripheral portion 76b. And the inner peripheral part 76a, the outer peripheral part 76b, and the spherical body 77 are configured to slide.
- a ball bearing 82 including a sphere 81 is provided between the inner peripheral portion 80a and the outer peripheral portion 80b.
- the inner peripheral portion 80a, the outer peripheral portion 80b, and the sphere 81 are configured to slide. Therefore, the resonator 61, the pressurizing part 62, the supporting members 73 and 74, and the inner peripheral parts 76a and 80a are integrally rotated freely.
- a substrate 63 that is one object is placed on the upper surface of the stage 70, and the substrate that is the other object is placed at a predetermined position on the upper surface of the substrate 63. 64 is placed.
- the pressurizing unit 62 is lowered so as to come into contact with a predetermined position on the upper surface of the substrate 64, and the substrate 63 and the substrate 64 are superposed and pressurized, and ultrasonic vibration is applied. Apply.
- the stage 70 since the stage 70 is moved in the Y direction shown in FIG. 8 by the stage table 12 (see FIG. 1) of the mounting mechanism 28, the pressurizing unit 62 that pressurizes the substrates 63 and 64, which are the objects, As the stage 70 moves, it rotates in a driven manner. Therefore, the resonator 61 integrated with the pressurizing unit 62, the support members 73 and 74, and the inner peripheral portions 76a and 80a also rotate. Therefore, the bonding portion between the substrate 63 and the substrate 64 is bonded by being pressed by the pressing portion 62 while being moved by the stage table 12.
- the ultrasonic vibration bonding apparatus shown in FIG. 9 is different from the ultrasonic vibration bonding apparatus shown in FIG. 8 in that the pressing portion 62 is provided on the outer peripheral surface of the resonator 61 outside the support means 67.
- the other configurations and operations are the same as the configurations and operations of the ultrasonic vibration bonding apparatus shown in FIG. Even if comprised in this way, the board
- the bonding operation can be performed continuously and efficiently while moving the bonding portion between the substrate 63 and the substrate 64. it can.
- the ball bearings 78 and 82 may be configured to include a drive mechanism such as a rotary motor and to rotate spontaneously by the drive mechanism instead of the above-described driven movement. Further, in this case, the stage 70 may be configured to move in a passive manner. Further, the ball bearings 78 and 82 themselves may be formed of the same material as the support members 73 and 74.
- FIG. 10 is a partial schematic configuration diagram of the head unit and the stage unit of the ultrasonic vibration bonding apparatus according to the third embodiment.
- FIG. 11 is a measurement result of the vibration amplitude of the resonator and the stage of the ultrasonic vibration bonding apparatus according to the third embodiment. It is.
- the same reference numerals as those in FIGS. 1 to 9 denote the same or corresponding elements.
- the ultrasonic vibration bonding apparatus shown in this embodiment is different from the first embodiment in that the substrate 24 is held in addition to the first clamp means 21 and the second clamp means 22 formed by support members.
- the entire stage 90 is formed by a vibration transmission restraining holding member.
- the entire stage 90 is formed by using the above-described twin-type damping alloy (for example, the above-described Mn—Cu alloy) as the vibration transmission restraining holding member.
- the laser beam is irradiated in the central axis direction of the resonator 7 by the length measuring means 95, and the vibration amplitude of the stage 90 when the stage 90 is made of iron, and the stage 90 The vibration amplitude of the stage 90 when it was formed by the vibration transmission restraining holding member was measured.
- FIG. 11 shows the measurement results. Note that the vibration amplitude of the resonator 7 was also measured, and the measurement results are also shown in FIG.
- the length measuring means 95 is installed so as to be movable in the vertical direction by a drive mechanism (not shown), and moved to a desired measurement position so that the vibration amplitude of the stage 90 and the resonator 7 can be measured. Further, in this experiment, with the resonator 7 resonated, the vibration amplitude of the stage 90 is measured at a position F where the laser beam can be applied to the stage 90 as shown in FIG. 10, and the laser beam is applied to the resonator 7. The vibration amplitude of the resonator 7 was measured at a possible position G.
- the vibration amplitude of the stage 90 when the stage 90 is made of iron was 3 ⁇ m. Further, the vibration amplitude of the resonator 7 at this time was 10 ⁇ m. Therefore, in this case, the relative vibration amplitude of the chip 23 held by the resonator 7 and the substrate 24 held by the stage 90 is 7 ⁇ m, and the chip 23 and the substrate 24 are slid with a vibration amplitude of 7 ⁇ m. Become.
- the stage 90 is formed of a vibration transmission restraining holding member, as shown in FIG. 11, when the output of the ultrasonic vibration energy applied to the resonator 7 is 100%, the vibration amplitude of the stage 90 is Was 0.2 ⁇ m. Therefore, in this case, the relative vibration amplitude between the chip 23 held by the resonator 7 and the substrate 24 held by the stage 20 is 9.8 ⁇ m, and the chip 23 and the substrate 24 slide with a vibration amplitude of 9.8 ⁇ m. Will be. Therefore, when the stage 90 is formed by the vibration transmission suppressing holding member, the ultrasonic vibration transmitted from the resonator 7 to the stage 90 via the chip 23 and the substrate 24 is suppressed by the vibration transmission suppressing holding member. In addition, the relative vibration amplitude of the chip 23 and the substrate 24 can be increased, and the chip 23 and the substrate 24 can be bonded efficiently.
- the stage 90 on which the substrate 24 is placed is formed by the vibration transmission restraining holding member, the ultrasonic wave transmitted from the resonator 7 to the stage 90 via the chip 23 and the substrate 24. Vibration can be accurately suppressed by the vibration transmission restraining holding member. Therefore, it is possible to suppress the vibration of the stage 90 and increase the relative vibration amplitude of the chip 23 and the substrate 24 and efficiently apply ultrasonic vibration to the chip 23 and the substrate 24 for bonding.
- the vibration transmission inhibiting holding member If a material having a logarithmic attenuation ratio larger than 0.01 and smaller than 1 is used as the vibration transmission inhibiting holding member, the ultrasonic vibration transmitted to the stage 90 is accurately absorbed by the vibration transmission inhibiting holding member. The vibration of the stage 90 is suppressed.
- the logarithmic attenuation factor of the material of the vibration transmission restraining holding member is desirably 0.1 or more.
- the vibration transmission suppression holding member when a material having a sound velocity greater than 5900 m / s is used as the vibration transmission suppression holding member, the ultrasonic vibration transmitted to the stage 90 is accurately dissipated by the vibration transmission suppression holding member, and the vibration of the stage 90 is Is suppressed.
- the sound speed of the material of the vibration transmission restraining holding member is preferably 6000 m / s or more.
- the material of the holding member for suppressing vibration transmission of the stage 90 is not limited to the twin-type damping alloy shown in the present embodiment, and the material having a logarithmic damping ratio in the range of 0.01 to 1 or the sound speed is 5900 m. Any material may be used as long as the material is larger than / s. Even if the entire stage 90 is not formed by the vibration transmission restraining holding member, it is sufficient that at least the mounting surface of the stage 90 has the vibration transmission restraining holding member.
- FIG. 12 is a partial schematic configuration diagram of an ultrasonic vibration bonding apparatus according to the fourth embodiment.
- FIG. 12 the same reference numerals as those in FIGS. 1 to 11 denote the same or corresponding parts.
- the ultrasonic vibration bonding apparatus shown in this embodiment is different from the first embodiment in that the resonator 7 is supported at a position other than the nodal point, and the holding means 100 is arranged with the vibrator 8 of the resonator 7. It is a point formed at the other end opposite to the one end. Since the stage 107 is the same as the stage 10 of the first embodiment, description thereof is omitted.
- the holding means 100 that holds the chip 104 that is the object is on the outer periphery near the other end (left end) opposite to one end (right side) where the vibrator 8 of the resonator 7 is disposed. It is formed in two places, upper and lower. Further, supported portions (not shown) having a concave shape are formed at two locations closer to one end and the other end of the resonator 7 than the nodal points f1 and f3 on the outer periphery of the resonator 7. . And the 1st clamp means 102 and the 2nd clamp means 103 which were each formed in the to-be-supported part by the supporting member are inserted, and the resonator 7 is supported.
- the first clamping means 102 and the second clamping means 103 are further supported by the support base 101, and the moving mechanism (not shown) disposed on the support base 101 is used to indicate the X together with the support base 101 in FIG. It moves to a direction, a Y direction, and a Z direction, and the position of the holding means 100 of the resonator 7 is moved to a predetermined position.
- a substrate 105 as one object is placed on the upper surface of the stage 107. Then, by the moving mechanism described above, the support base 101 is lowered so that the predetermined metal molten bump 104a of the chip 104 and the predetermined metal molten bump 105a of the substrate 105 come into contact with each other, and the chip 104 and the substrate 105 are superposed to each other. Joined by sonic vibration.
- the interval between the first clamp means 102 and the second clamp means 103 is formed wide, and the first clamp means 102 and the second clamp means 103 that support the resonator 7 are the nodal points f1
- the first clamp means 102 is disposed closer to both ends of the resonator 7 than f3, and is positioned closer to the holding means 100, the abnormal vibration of the resonator 7 is supported while supporting the resonator 7 with high rigidity.
- the resonator 7 can be stably vibrated with a desired vibration without deviating the natural frequency of the resonator 7. Therefore, the chip 104 and the substrate 105 can be pressurized with a higher pressing force.
- the holding means 100 is formed near the other end of the resonator 7, for example, it is possible to perform a joining operation inside the object having a box shape. Furthermore, since the holding means 100 is formed at two locations on the upper and lower sides of the outer periphery on the other end side of the resonator 7, the resonator 7 is rotated 180 degrees with respect to the axis of the resonator to replace the holding means 100. Is also possible.
- the supporting member is provided in the part which contacts the to-be-supported part of the 1st and 2nd clamping means 102 and 103, a part of 1st and 2nd clamping means 102 and 103 will be formed with the supporting member.
- the entire first and second clamping means 102 and 103 may be constituted by a support member.
- the shape of the supported portion formed on the outer periphery of the resonator is not limited to the concave shape, and may be other shapes.
- the stage 107 may be formed of a vibration transmission restraining holding member, and is configured to efficiently apply ultrasonic vibrations to the chip 104 and the substrate 105 by suppressing the vibration of the stage 107 by the vibration transmission restraining holding member. May be.
- FIGS. 13 is a schematic configuration diagram of a longitudinal vibration type ultrasonic vibration welding apparatus according to a fifth embodiment of the present invention
- FIG. 14 is a schematic configuration diagram of a conventional longitudinal vibration type ultrasonic vibration bonding apparatus for comparison
- FIG. It is a schematic block diagram of the other example of the longitudinal-vibration type ultrasonic vibration joining apparatus in 5th Embodiment of invention.
- 13 to 15 the same reference numerals as those in FIGS. 1 to 12 denote the same or corresponding components.
- the ultrasonic vibration bonding apparatus shown in the present embodiment is different from the first embodiment in that the vibration direction of ultrasonic waves applied to the target chip 110 and the substrate 111 is relative to the surfaces of the chip 110 and the substrate 111.
- This is a longitudinal vibration type ultrasonic vibration bonding apparatus in the vertical direction, and this is a point in which the resonator supporting device according to the present invention is used for this vertical vibration type ultrasonic vibration bonding apparatus.
- the longitudinal vibration type ultrasonic vibration bonding apparatus 112 includes a stage unit 113, a vertical drive unit 114, and a head unit 115.
- the stage unit 113 includes a stage 117 on which the chip 110 and the substrate 111 that are objects are placed. Since the stage 117 is the same as the stage 10 of the first embodiment, description thereof is omitted.
- the vertical drive unit 114 includes a support column 119, a support base 120, a spring 121, a load cell 122 for detecting pressure, a cylinder joint 123, an air cylinder 124, and a trigger unit 125 on the upper surface of the stand 118. Yes. Further, a guide 126 is disposed on the support base 120, and when the air cylinder 124 is pressurized or depressurized, the support base 120 moves up and down via the cylinder joint 123, the load cell 122, and the spring 121. With the vertical movement of the guide 126, the guide 126 slides up and down along the support column 119, so that the head part 115 moves up and down.
- the trigger unit 125 includes a sensor unit 127 and a dog 128.
- the sensor unit 127 is disposed at an end portion of the support base 120, has a recess, and includes a photomicrosensor inside thereof.
- the dog 128 is disposed at a position facing the sensor unit 127 so as to be able to enter and leave the concave portion of the sensor unit 127.
- the spring 121 is pressurized and contracted by the air cylinder 124, the dog 128 is inserted into the recess of the sensor unit 127, and when the dog 128 is detected by the photomicrosensor of the sensor unit 127, the head unit 115 described later.
- a voltage is applied to the vibrator 131, and the vibrator 131 vibrates to resonate the resonator 130.
- the trigger part 125 may be comprised by the other switch mechanism.
- the pressure applied by the air cylinder 124 may be detected by the load cell 122, and a voltage may be applied to the vibrator 131 when a predetermined amount of pressure is detected.
- a linear encoder 129 is disposed on the support column 119, and is configured to detect the height of the head unit 115 as the guide 126 moves up and down.
- the head unit 115 includes a resonator 130 and a vibrator 131.
- the resonator 130 is formed such that its axial length is 1 ⁇ 2 wavelength of the resonance frequency of the resonator, and both ends of the resonator 130 have a maximum vibration amplitude point and a quarter wavelength from the maximum vibration amplitude point.
- the position is the minimum vibration amplitude point (nodal point).
- the resonator 130 includes a horn 132 and an intermediate booster 133, and a vibrator 131 is disposed at one end of the intermediate booster 133 and the horn 132 is disposed at the other end.
- the junction part 134 which contact
- the resonator 130 is supported by the support means 135 and is arranged on the support stand 120.
- the support means 135 includes a first clamp means 136, a second clamp means 137, and a base 138, and the first clamp means 136 is attached to a concave supported portion (not shown) formed on the outer periphery of the intermediate booster 133.
- the second clamp means 137 is inserted into a concave supported portion (not shown) formed on the outer periphery of the vibrator 131 to support the resonator 130.
- a support member is provided at a portion of the first and second clamp means 136 and 137 that contacts the supported portion, and the resonator 130 is supported by these support members.
- the 1st, 2nd clamp means 136,137 may comprise the whole with the support member.
- the head portion 115 of the conventional longitudinal vibration type ultrasonic vibration bonding apparatus cited as a comparative example with the fifth embodiment has a convex portion 144 on the outer periphery of the intermediate booster 133 of the resonator 130.
- Two O-rings 145 made of silicon rubber are arranged on the outer periphery of the intermediate booster so as to sandwich the convex portion 144, and the O-ring 145 and the convex portion 144 are inserted into the concave portion of the support portion 146 having a concave portion. And is housed in a cylindrical portion 147 disposed on the support stand 120.
- the O-ring 145 is made of silicon rubber and is soft.
- the configuration of the support device becomes large and complicated, and the size and simplification of the device can be reduced. It is difficult to realize.
- the resonator 130 is stably supported at a position other than the nodal point, and the resonator 130 is resonated. It is possible to stably vibrate at a desired vibration without shifting the natural frequency of the vessel 130, and it is possible to bond the chip 110 and the substrate 111 with high accuracy by preventing the object from being damaged. In addition, the entire apparatus can be reduced in size and simplified.
- the resonator 150 shown in FIG. 15 is formed such that the axial length is one wavelength of the resonance frequency of the resonator, and both ends and the center of the resonator 150 are from the maximum vibration amplitude point and the maximum vibration amplitude point.
- the position of the quarter wavelength is the minimum vibration amplitude point (nodal point).
- the resonator 150 includes a horn 152 and an intermediate booster 153, and a vibrator 131 is disposed at one end of the intermediate booster 153 and the horn 152 is disposed at the other end.
- abuts to a target object and applies an ultrasonic vibration is formed in the other end opposite to the end where the intermediate
- the resonator 150 is supported by the support means 155 and is arranged on the support table 120.
- the support unit 155 includes a first clamp unit 156, a second clamp unit 157, and a base portion 158.
- the support unit 155 includes first and second concave supported portions (not shown) formed on the outer periphery of the intermediate booster 153.
- the two clamp means 156 and 157 are fitted and inserted to support the resonator 150. With this configuration, the resonator 150 can be vibrated more stably with a desired vibration without shifting the natural frequency of the resonator.
- portions of the first and second clamp means 156 and 157 contacting the supported portions are provided with support members.
- the shape of the supported portion formed on the outer periphery of the intermediate booster 153 is not limited to the concave shape, and the first and second clamping means 156 and 157 may be entirely constituted by a supporting member.
- the resonators 130 and 150 can be vibrated stably with a desired vibration without the natural frequencies of the resonators 130 and 150 being shifted. It is possible to prevent the object from being damaged and to perform the joining with high accuracy. In addition, the entire apparatus can be reduced in size and simplified.
- FIG. 16 is a schematic configuration diagram of an ultrasonic vibration cutting device according to the sixth embodiment
- FIG. 17 is a partial schematic configuration diagram of a resonator of the ultrasonic vibration cutting device shown in FIG.
- 16 and 17 the same reference numerals as those in FIGS. 1 to 15 denote the same or corresponding components.
- the sixth embodiment is different from the fifth embodiment in an ultrasonic vibration cutting device in which the support device 160 according to the present embodiment is disposed.
- the resonator 163 vibrates longitudinally.
- the substrate 165 that is the object to be cut is cut by the blade 164 that is rotated in a predetermined direction and disposed on the resonator 163.
- the head portion 161 of this embodiment includes a resonator 163 having a vibrator 162 and a blade 164, and includes a first clamp unit 166, a second clamp unit 167, and a base 168.
- the resonator 163 is supported by the means 169.
- the resonator 163 is supported by the vertical drive unit 116 by screwing a screw hole (not shown) provided in the base 168 and the ball screw 225.
- the vertical drive unit 116 includes a vertical drive motor 224 and a ball screw 225.
- the vertical drive motor 224 rotates, the base 168 screwed into the ball screw 225 moves up and down. .
- the head portion 161 moves up and down while the guide 126 provided on the base portion 168 slides on the convex portion provided on the support column 119.
- a linear encoder 129 is disposed on the support column 119, and thereby the height of the head unit 116 is detected. Since the stage unit 113 is the same as the stage unit 113 of the fifth embodiment, the description thereof is omitted.
- the resonator 163 has a first supported portion 171 and a second supported portion 172 formed on the outer periphery of the resonator 163 and is supported by first and second clamping means 166 and 167, respectively.
- first and second clamping means 166 and 167 include support members 173 and 174 at portions contacting the supported parts 171 and 172, respectively, and ball bearings 175 and 176 on the outer periphery of the support member. .
- the ball bearing 175 includes an inner peripheral portion 177a, an outer peripheral portion 177b, and a sphere 178 between the inner peripheral portion 177a and the outer peripheral portion 177b, and the inner peripheral portion 177a, the outer peripheral portion 177b, and the sphere 178 slide. It has become.
- the ball bearing 176 includes an inner peripheral portion 180a, an outer peripheral portion 180b, and a sphere 181 between the inner peripheral portion 180a and the outer peripheral portion 180, and the inner peripheral portion 180a, the outer peripheral portion 180b, and the sphere 181 are slid. It is configured to move.
- the resonator 163 includes a drive mechanism such as a rotary motor (not shown), and the resonator 163, the blade 164, the support members 173 and 174, and the inner peripheral portions 177a and 180a rotate together by the drive mechanism. It has a configuration.
- a substrate 165 as an object is placed on the upper surface of the stage 117, and the blade 164 is lowered by the vertical drive unit 116 so as to contact a predetermined position on the upper surface of the substrate 165.
- the ultrasonic vibration (longitudinal vibration) in the vertical direction is applied to the upper surface of the substrate 165 to cut the substrate 165.
- the resonator support device 160 according to the present invention can be used in an ultrasonic vibration cutting device, and the substrate 165 can be efficiently cut while stably vibrating the resonator.
- the stage 117 may be formed of a vibration transmission suppression holding member, and may be configured to efficiently apply ultrasonic vibration to the substrate 165 by suppressing the vibration of the stage 117 by the vibration transmission suppression holding member. .
- the resonator support device according to the present invention is not limited to the ultrasonic vibration bonding device and the ultrasonic vibration cutting device, and may be incorporated into various processing devices and other devices as long as the ultrasonic vibration is used.
- the ultrasonic vibration applied to the substrate or the like may be parallel or perpendicular to the surface of the substrate or the like.
- the support means is not limited to the configuration in which the resonator is cantilevered at one location, and may be configured to support at two locations or more. Moreover, as long as the support member is provided in the part which contacts the to-be-supported part of a clamp means, a part of clamp means may be formed with the support member, and the whole clamp means may be comprised with the support member. Good.
- the shape, material, size and the like of the resonator are not limited to those shown in the above-described embodiment, and may be anything.
- the shape of the supported portion formed on the outer periphery of the resonator is not limited to the concave shape, and may be other shapes.
- the size of the resonator in the central axis direction is not limited to the length of one wavelength of the resonance frequency of the resonator, and may be any length.
- the holding means 40 is directly bonded and fixed to the resonator 7 with a thermosetting adhesive.
- the bonding method is not limited to the thermosetting adhesive. After performing Ni plating or the like on the bonding surface, a brazing metal such as Ag, Cu, or Ni may be brazed as an adhesive.
- the fixing method is not limited to adhesion, and the holding means 40 may be directly attached to the resonator 7 with a bolt or the like. Further, it may be formed by cutting out from the resonator 7 and integrated with the resonator 7.
- the voltage value, current value, applied pressure, time, and the like necessary for achieving the target bonding area are determined and set in advance.
- the ultrasonic vibration energy of the vibrator 8 may be monitored, and the time when the ultrasonic vibration energy decreases may be set as the end of bonding.
- pressure and ultrasonic vibration energy are applied to the chip 23 and the substrate 24 even after the bonding is completed. It is possible to prevent the chip 23 and the substrate 24 from being broken.
- a plurality of amplitude detectors 33 may be provided, and the amplitude of the chip 23 and the substrate 24 may be measured simultaneously. After the amplitudes of the chip 23 and the substrate 24 are measured in order by the two amplitude detectors 33, the relative vibration amplitude of the chip 23 and the substrate 24 is calculated by calculating the amplitude difference in a state where the time axes are shifted and the time axes are overlapped. It can also be measured. If the chip 23 and the substrate 24 are securely held by the resonator 7 and the stage 10, it is only necessary to detect the amplitude of either the chip 10 or the substrate 24.
- any known detector such as an eddy current type, a capacitance type, a light irradiation type, or a sound wave detection type may be used. By using these means, for example, cost reduction can be achieved as compared with the case of using a laser Doppler measuring device.
- the position recognition unit 29 is configured to emit light by causing the light emitting element to function electrically when the light emitting element is joined as an object. It is good also as providing the light emission point recognition means utilized when performing position adjustment between.
- ultrasonic vibration bonding may be performed while heating the chip 23 and the substrate 24 by the heaters 9 and 11 disposed on the base 20 of the support means and the stage 10.
- the heaters 9 and 11 may be of any system such as a constant heat system or a pulse heat system.
- the heater 9 for heating the chip 23 may be disposed in the first and second clamping means 21 and 22, the holding means 40, or the resonator 7 instead of the base 20.
- the chip 23 and the substrate 24 can be bonded by the bonding energy generated efficiently.
- the control device 31 controls the heating temperature and timing as well as the pressing force and the ultrasonic vibration energy, so that the chip 23 and the substrate 24 can be moved in a short time with less pressing force and ultrasonic vibration energy.
- the devices can be formed by bonding. Therefore, it is possible to prevent the chip 23 and the substrate 24 from being damaged by applying excessive pressure or ultrasonic vibration energy to the chip 23 and the substrate 24 at the time of device creation, and to provide a highly accurate device. .
- the holding mechanism installed in the holding means 40 and the stage 10 for holding the chip 23 and the substrate 24 is not limited to the holding mechanism based on vacuum suction, but is also based on a holding mechanism using an electrostatic chuck, a mechanical chuck mechanism, or a magnetic suction mechanism.
- a well-known holding mechanism may be employed.
- the holding means 40 and the stage 10 are provided with an electrostatic chuck means to adsorb the chip 23 and the substrate 24, the chip 23 can be held in a vacuum, so the chip 23 and the substrate 24 in a vacuum. And impurities such as organic substances and oxide films are prevented from adhering to the chip 23 and the substrate 24, so that the chip 23 and the substrate 24 can be bonded satisfactorily.
- the stage 10 side is configured to have a horizontal position adjustment function and the head unit 26 side has a vertical drive mechanism.
- the horizontal position adjustment function, the vertical drive mechanism is the stage 10 side, It may be combined in any way on the head portion 26 side, and may be configured to overlap.
- the head unit 26 and the stage 10 are arranged in the vertical direction (the direction of the arrow Z shown in FIG. 1), and the chip 23 and the substrate 24 that are objects are overlapped in the vertical direction and joined.
- the arrangement direction is not limited to this, and a configuration may be employed in which they are overlapped and joined in the horizontal direction substantially orthogonal to the vertical direction. Three or more objects may be polymerized and joined.
- the method by torque control of the vertical drive motor 1 is shown as the pressurizing means, but a pressurizing means using fluid pressure by an air cylinder may be used.
- the object may be a material other than a semiconductor (a resin substrate, a film substrate, a chip obtained by dicing these substrates, or the like). Further, the object may be any object as long as it can be joined by transmitting ultrasonic vibration.
- a metal melt bump or wiring pattern is formed on a wafer or chip formed of a metal such as Si, SiO 2 , glass, lithium ionic acid, oxide single crystal (LT), or an oxide containing a ceramic system. Can be joined together.
- the material for forming the metal melt bump is not limited to lead-tin solder, but may be any other metal or other metal as long as it can be joined by applying ultrasonic vibration.
- the form of the object may be any form such as a substrate, a wafer, a chip obtained by dicing the substrate, and the wafer.
- the form of the metal melt bump may be a plurality of individual bump shapes, or a shape in which a certain region between the objects is connected in a contour so that the objects can be sealed with each other. Also good. Moreover, you may join the whole surface of one side of a target object instead of joining metal fusion bumps.
- the member that has been used for the purpose of suppressing the vibration of the vibrating body itself by attenuating or radiating the vibration of the vibrating body is used as the vibration of the resonator that is the vibrating body.
- the most characteristic feature is that it is adopted as a support member that supports without obstructing.
- This technical idea is a technical idea that is completely different from the conventional technical idea of using the above-described member to suppress the vibration of the vibrating body itself, and was first conceived by the present inventor through various experiments. This is the technical idea that was first conceived.
- the present invention can be applied to a resonator support device that resonates by ultrasonic vibration of a vibrator.
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Abstract
Description
この発明の第1実施形態について図1ないし図4を参照して説明する。図1はこの発明にかかる共振器の支持装置を組み込んだ超音波振動接合装置の一実施形態の概略構成図、図2は図1に示す超音波振動接合装置が備える共振器の構成図である。また、図3は支持手段により支持された共振器の構成図であり、(a)は正面図、(b)は(a)の右側面図であって、共振器のA-A線矢視断面図である。また、図4は支持手段の振動振幅を測定するための実験装置の概略構成図、図5は支持手段の所定位置における振動振幅の計測結果、図6は各材質の対数減衰率を示すグラフ、図7は各材質の音速を示す図である。
第1実施形態では、本発明にかかる共振器の支持装置が組み込まれた超音波振動接合装置を例として説明する。本実施形態では、一方の接合の対象物である半導体の接合面に鉛錫はんだからなる金属溶融バンプ23aを有するチップ23と、他方の接合の対象物である金属溶融バンプ24aを有する基板24とを超音波振動により接合する。なお、チップ23は後に説明する共振器7の保持手段40に保持され、基板24は後に説明するステージ10に載置される。
共振器7を支持する支持手段44の支持部材の材質について、本発明者は以下のような実験により、支持部材として適した材質の条件を見出した。
次に、チップ23を基板24に面実装するために、チップ23の金属溶融バンプ23aと基板24の金属溶融バンプ24aとを超音波振動により接合する一連の動作について説明する。
次に、本発明の第2実施形態について図8、図9を参照して説明する。図8は本発明の第2実施形態における超音波振動接合装置の部分概略構成図であって、(a)は正面図、(b)は部分断面図である。図9は図8に示す超音波振動接合装置の他の例の部分概略構成図であって、(a)は正面図、(b)は部分断面図である。以下に、第1実施形態との相違点について詳細に説明する。なお、図8、図9において、図1ないし図4と同一符号は同一もしくは相当するものを示す。
次に、本発明の第3実施形態について、図10、11を参照して説明する。図10は、第3実施形態における超音波振動接合装置のヘッド部およびステージ部の部分概略構成図、図11は第3実施形態における超音波振動接合装置の共振器およびステージの振動振幅の測定結果である。以下に、第1実施形態との相違点について詳細に説明する。なお、図10、図11において、図1ないし図9と同一符号は同一もしくは相当するものを示す。
次に、本発明の第4実施形態について、図12を参照して説明する。図12は、第4実施形態における超音波振動接合装置の部分概略構成図である。以下に、第1実施形態との相違点について詳細に説明する。なお、図12において、図1ないし図11と同一符号は同一もしくは相当するものを示す。
次に、本発明の第5実施形態について、図13ないし図15を参照して説明する。図13は本発明の第5実施形態における縦振動式超音波振動接合装置の概略構成図、図14は比較のための従来における縦振動式超音波振動接合装置の概略構成図、図15は本発明の第5実施形態における縦振動式超音波振動接合装置の他の例の概略構成図である。以下に、第1実施形態との相違点について詳細に説明する。なお、図13ないし図15において、図1ないし図12と同一符号は同一もしくは相当するものを示す。
次に、本発明の第6実施形態について、図16および図17を参照して説明する。第6実施形態では、本発明にかかる共振器の支持装置が組み込まれた超音波振動切削装置を例として説明する。図16は、第6実施形態における超音波振動切削装置の概略構成図、図17は図16に示す超音波振動切削装置の共振器の部分概略構成図である。以下に、第5実施形態との相違点について詳細に説明する。なお、図16および図17において、図1ないし図15と同一符号は同一もしくは相当するものを示す。
8、60、131、162 振動子
10、70、90、107、117 ステージ
23、104、110 チップ(対象物)
24、63、64、105、111、165 基板(対象物)
41、71、171 第1被支持部
42、72、172 第2被支持部
44、68、135、155、169 支持手段
51、52、73、74、173、174 支持部材
Claims (4)
- 振動子の超音波振動により共振する共振器と、
前記共振器の外周面に形成された被支持部と、
前記被支持部に係合して前記共振器の固有振動数がずれないように前記共振器を支持する支持手段とを備え、
前記支持手段は、対数減衰率が0.01より大きく1より小さい材質からなる支持部材を、前記共振器と接触する箇所に備えることを特徴とする共振器の支持装置。 - 振動子の超音波振動により共振する共振器と、
前記共振器の外周面に形成された被支持部と、
前記被支持部に係合して前記共振器の固有振動数がずれないように前記共振器を支持する支持手段とを備え、
前記支持手段は、音速が5900m/sより大きい材質からなる支持部材を、前記共振器と接触する箇所に備えることを特徴とする共振器の支持装置。 - 前記共振器の下方に、超音波振動を印加する対象物を載置するステージをさらに備え、
前記ステージは、少なくとも前記対象物を載置する載置面に対数減衰率が0.01より大きく1より小さい材質からなる振動伝達抑止用保持部材を備えることを特徴とする請求項1または2に記載の共振器の支持装置。 - 前記共振器の下方に前記対象物を載置するステージをさらに備え、
前記ステージは、少なくとも前記対象物を載置する載置面に音速が5900m/sより大きい材質からなる振動伝達抑止用保持部材を備えることを特徴とする請求項1または2に記載の共振器の支持装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
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US12/935,865 US8353442B2 (en) | 2008-04-07 | 2009-04-06 | Support device for resonator |
CN2009801101789A CN101978484B (zh) | 2008-04-07 | 2009-04-06 | 谐振器的支承装置 |
PL09731400T PL2267765T3 (pl) | 2008-04-07 | 2009-04-06 | Urządzenie podpierające rezonator |
EP09731400.9A EP2267765B1 (en) | 2008-04-07 | 2009-04-06 | Support device for resonator |
KR1020107024511A KR101161724B1 (ko) | 2008-04-07 | 2009-04-06 | 공진기의 지지장치 |
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JP2008-220890 | 2008-08-29 | ||
JP2008220890A JP4311582B1 (ja) | 2008-04-07 | 2008-08-29 | 共振器の支持装置 |
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PCT/JP2009/057068 WO2009125748A1 (ja) | 2008-04-07 | 2009-04-06 | 共振器の支持装置 |
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US (1) | US8353442B2 (ja) |
EP (1) | EP2267765B1 (ja) |
JP (1) | JP4311582B1 (ja) |
KR (1) | KR101161724B1 (ja) |
CN (1) | CN101978484B (ja) |
HU (1) | HUE042957T2 (ja) |
PL (1) | PL2267765T3 (ja) |
WO (1) | WO2009125748A1 (ja) |
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US20120006264A1 (en) * | 2010-07-06 | 2012-01-12 | Hitachi Displays, Ltd. | Film formation apparatus |
JP2012161767A (ja) * | 2011-02-09 | 2012-08-30 | Adwelds:Kk | 共振器の支持装置 |
WO2015045935A1 (ja) * | 2013-09-25 | 2015-04-02 | 東レエンジニアリング株式会社 | ボンディング装置 |
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Also Published As
Publication number | Publication date |
---|---|
KR101161724B1 (ko) | 2012-07-04 |
JP4311582B1 (ja) | 2009-08-12 |
US8353442B2 (en) | 2013-01-15 |
CN101978484B (zh) | 2012-07-25 |
EP2267765A4 (en) | 2016-09-14 |
EP2267765B1 (en) | 2019-01-16 |
US20110036897A1 (en) | 2011-02-17 |
PL2267765T3 (pl) | 2019-07-31 |
CN101978484A (zh) | 2011-02-16 |
EP2267765A1 (en) | 2010-12-29 |
KR20100135869A (ko) | 2010-12-27 |
JP2009272599A (ja) | 2009-11-19 |
HUE042957T2 (hu) | 2019-07-29 |
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