WO2004030079A1 - 接合方法および装置 - Google Patents
接合方法および装置 Download PDFInfo
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- WO2004030079A1 WO2004030079A1 PCT/JP2003/012206 JP0312206W WO2004030079A1 WO 2004030079 A1 WO2004030079 A1 WO 2004030079A1 JP 0312206 W JP0312206 W JP 0312206W WO 2004030079 A1 WO2004030079 A1 WO 2004030079A1
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- H01L24/00—Arrangements for connecting or disconnecting semiconductor or solid-state bodies; Methods or apparatus related thereto
- H01L24/74—Apparatus for manufacturing arrangements for connecting or disconnecting semiconductor or solid-state bodies
- H01L24/75—Apparatus for connecting with bump connectors or layer connectors
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- H01L24/81—Methods for connecting semiconductor or other solid state bodies using means for bonding being attached to, or being formed on, the surface to be connected using a bump connector
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- H01L2224/01—Means for bonding being attached to, or being formed on, the surface to be connected, e.g. chip-to-package, die-attach, "first-level" interconnects; Manufacturing methods related thereto
- H01L2224/10—Bump connectors; Manufacturing methods related thereto
- H01L2224/15—Structure, shape, material or disposition of the bump connectors after the connecting process
- H01L2224/16—Structure, shape, material or disposition of the bump connectors after the connecting process of an individual bump connector
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- H01L2224/79—Apparatus for Tape Automated Bonding [TAB]
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Definitions
- the present invention relates to a joining method and an apparatus for joining objects having a metal joint on the surface of a base material such as chips, wafers, and various circuit boards.
- Japanese Patent No. 2791429 discloses a method of joining silicon wafers together in a vacuum at room temperature prior to joining.
- a method for bonding silicon wafers is disclosed in which an inert gas ion beam or an inert gas fast atom beam is irradiated and sputter-etched.
- oxides and organic substances on the bonding surface of the silicon wafer are blown off by the above beam to form a surface with activated atoms, and the surfaces are bonded together by a high bonding force between the atoms . Therefore, this method basically eliminates the need for heating for bonding, and enables bonding at room temperature or a lower temperature by simply bringing the activated surfaces into contact with each other.
- the bonding surfaces of the metal bonding portions whose surfaces have been activated by the etching by the energy wave as described above are bonded together. Not only high positioning accuracy is required, but also multiple sets of metal joints to be joined must be evenly abutted. For example, if at least one of the objects has a metal joint formed on the bump, and if there is a variation in the height of each bump, the bumps of the other object will be bonded to the corresponding metal joints of the other object. Occasionally, the bonding surfaces cannot be brought into good contact, resulting in bumps and the inconvenience that it is difficult to bond all the bumps to achieve a desired electrical connection state.
- an object of the present invention is to provide a method for joining objects to be joined which have been cleaned by an energy wave at the joint surface of the metal joint, even when the metal joint has a variation in height. It is an object of the present invention to provide a joining method and an apparatus capable of effectively and easily joining all metal joints even when the degree of parallelism between joints does not match.
- a joining method provides a method for joining objects having a metal joint on a surface of a base material, by using an energy wave on the surface of the metal joint of both objects.
- the bonding of the objects to be bonded can be performed in the air, can be performed under reduced pressure (in a vacuum), and can be performed in an inert gas. Further, the cleaning and bonding by the energy wave can be performed at different positions, or can be performed at the same position, for example, in the same chamber. In the latter case, it is also possible to carry the object to be bonded in the atmosphere, clean it with an energy wave in the champer, and then join it in the same chamber.
- the bonding method according to the present invention it is possible to bond the metal joints after cleaning at room temperature or at a low temperature close thereto, but the joint can be more easily performed when heating is used in combination. .
- a plasma for the cleaning by the energy wave, it is preferable to use a plasma from the viewpoint of easiness of handling and control, and it is particularly preferable to use an Ar plasma generated in an Ar gas atmosphere.
- the entire surface to be joined of the metal joint is etched to a depth of 1 nm or more. Irradiation single-wave irradiation that can be etched to such a depth or more can provide the surface properties necessary for joining metal joints even in the air.
- the joining according to the present invention is particularly suitable for joining metal joints whose surfaces are made of gold, copper, A1, In, or Sn.
- gold, copper, Al, In, Sn Some of the same metals can be used, or any two different metals can be used, or one can be gold and the other can be copper, Al, In, or Sn.
- bonding can be performed reliably even at room temperature.
- bonding of gold / copper, gold Z aluminum, etc. bonding can be performed at room temperature or a low temperature close thereto.
- the entire electrode or the like forming the metal joint can be made of gold, but only the surface is made of gold. You can also.
- the form for forming the surface with gold is not particularly limited, and a form of gold plating or a form in which a gold thin film is formed by sputtering or vapor deposition may be employed.
- the thickness of the base material of the article to be pressurized through the elastic material is 100 m or less.
- the pressure is applied through the elastic material.
- the base material itself and, consequently, the object itself can be deformed by the applied pressure, and the deformation allowance can be absorbed by the elastic material. That is, when a joining force is applied to join the objects to be joined, among a plurality of sets of metal joints, a certain set of metal joints comes into contact first due to a variation in height of the metal joints. At this stage, the remaining sets of metal joints are still in a separated state, but they are separated from each other because at least one base material of the object is pressed through the elastic material.
- the workpiece can be displaced in a direction that automatically absorbs the above-mentioned irregularity in parallelism due to the deformation of the elastic material itself.
- the metal joints can be satisfactorily adhered to each other. All metal joints Good adhesion enables bonding at or near room temperature.
- the thickness of the base material of the article to be pressed through the elastic material is not particularly limited.
- Ultrasonic bonding can also be used for low-temperature gold-gold bonding, but if an elastic body is interposed, ultrasonic waves will not be transmitted and bonding will not be possible, making it unsuitable for applications where such parallelism varies. .
- the joining pressure is not particularly limited, as described above, by setting the thickness of the base material of the article to be joined to be as thin as 100 / m or less, the elastic material can be formed at a low pressure of 300 MPa or less. It is possible to achieve the desired metal-to-metal contact via the via. For example, when a Si wafer thinned to a thickness of 50 m is pressed at 300 MPa through an elastic material, the bump height variation of 2 m of soil is easily tolerated and the bonding is reduced. did it. In addition, even when the base material of the workpiece is not required to be deformed, the load on the apparatus can be reduced by setting such a low pressure.
- At the time of joining metal joints at least one of the metal joints has a surface hardness of 120 or less in Pickers hardness Hv, more preferably by annealing so that the surfaces can be in good contact with each other.
- the hardness is preferably reduced to 100 or less.
- the surface hardness ⁇ is in the range of 30 to 70 (for example, the average ⁇ is 50).
- the joining method according to the present invention it is also possible to perform the final predetermined joining in one step by joining while allowing the deformation of the base material and the displacement of the article to be joined via the elastic material.
- Temporary joining and final joining can be performed by the same device, and both joining can be pressure joining via elastic material.
- Temporary joining and final joining can be done by different devices, and either temporary joining or final joining can be performed.
- a joining apparatus is an apparatus for joining objects to be joined having a metal joint on a surface of a base material, wherein the washing means cleans the surface of the metal joint with an energy wave;
- the cleaning means may be configured as a means for irradiating the surface of the metal joint with an energy wave under atmospheric pressure, or an energy wave may be applied to the surface of the metal joint under reduced pressure. Irradiation means may be used.
- the joining means may be constituted by means for joining metal joints in the air, or may be constituted by means for joining metal joints under reduced pressure. It can also be constituted by means for joining metal joints inside.
- the joining means may have a heating means for heating to 180 ° C. or less, preferably less than 150 ° C. in order to promote the joining between the metals in the solid phase together with the pressure means. preferable.
- a plasma irradiation means is preferable, and among them, an Ar plasma irradiation means is preferable.
- the above-mentioned cleaning means has a depth of 1 nm or more on the entire surface to be joined of the metal joint in order to perform necessary surface etching even when joining the metal joints in the air. It is preferable to comprise means for irradiating one energy or more with one or more energy capable of etching.
- the combination of the surface metal types of the two metal joints to be joined is the same metal of any one of gold, copper, Al, In, and Sn, or any two different metals. It is possible to combine them with each other, or to combine one with gold and the other with copper, Al, In, or Sn. Above all, when gold is combined, bonding becomes the easiest.
- the base material of the article to be joined pressed through the elastic material has a height of the metal joint, It is preferable that the thickness of the base material is 100 m or less in order to easily and appropriately deform to absorb the dust.
- the joining pressure by the pressurizing means can be controlled to a low pressure of 300 MPa or less.
- the object to be joined is applied via an elastic material.
- the workpieces can be displaced in a direction in which the parallelism between the workpieces is automatically corrected by the deformation of the elastic material itself, and substantially all the metal joints are brought into good contact with each other. It becomes possible.
- the base material of the object to be bonded is not required to be deformed, the thickness of the base material of the object to be pressed through the elastic material is not particularly limited.
- the joining pressure by the pressurizing means may be any pressure that can automatically correct the parallelism between the two workpieces by the deformation of the elastic material itself, but is preferably low from the viewpoint of the load on the device.
- the surface hardness of at least one of the metal joints is 120 or less, preferably 100 or less, in Vickers hardness Hv so that the metal joints are more closely joined.
- the joining means may have a function of temporarily joining the objects to be joined and a function of finally joining after the temporary joining.
- the present invention also provides a joined body produced by the joining method as described above. That is, the joined body according to the present invention is a joined body of objects to be joined having a metal joint on the surface of the base material, and the surfaces of the metal joints of both the objects are cleaned by an energy wave.
- At least one of the joined objects can be made of a semiconductor.
- the surface of the metal bonding portion of the workpiece is irradiated with an energy wave under reduced pressure or atmospheric pressure, and the surface is cleaned and activated by etching.
- Parts are pressurized by the joining device (In some cases, combined with heating).
- the joining device In some cases, combined with heating.
- the workpiece is pressurized through the elastic material, the base material of the workpiece is automatically and appropriately deformed so that all the metal joints come into contact with each other, and at the same time, the deformation allowance is reduced. Absorbed by elastic material.
- predetermined heating can be performed more easily by using heating at an appropriate temperature.
- the joining method and apparatus when joining objects to be joined each other after cleaning the joint surface of the metal joint by the energy wave, when there is a variation in the height of the metal joint, Even if there is, or even when the parallelism between the two objects is not the same, all metal joints can be reliably brought into contact with each other, and good and easy joining can be achieved.
- FIG. 1 is a schematic configuration diagram of a joining device according to an embodiment of the present invention.
- FIG. 2 is an enlarged schematic partial front view of a joint in the apparatus of FIG.
- FIG. 3 is a schematic front view of the apparatus in FIG. 2 during a joining operation.
- FIG. 4 is a schematic partial front view of the joining device when the elastic material is interposed on both sides.
- FIG. 5 is a schematic partial front view of a joining device according to another embodiment of the present invention.
- FIG. 6 is a schematic front view of the apparatus shown in FIG. 5 during a joining operation. [Explanation of symbols]
- FIG. 1 shows a joining apparatus 1 according to one embodiment of the present invention.
- the workpieces 4 or 5 having the metal joints 2 or 3 on the surface of the base material are bonded to the metal joints 2 and 3 by the plasma 9 radiated from the plasma irradiating means 8 as a means for cleaning with energy waves.
- the joining surfaces of the metal joints 2 and 3 are cleaned by etching in the chamber 7, which is decompressed by the vacuum pump 6 to a predetermined degree of vacuum, by plasma 9 (cleaning). Process).
- the Ar gas can be supplied into the chamber 7 by the pump 10, so that plasma irradiation can be performed in an Ar gas atmosphere.
- the cleaned workpieces 4 and 5 are taken out of the cleaning chamber 7, and the metal bonding sections 2 and 3 are bonded to each other in, for example, the atmosphere in a bonding process (a bonding apparatus section 11).
- this joint 11 is, for example, entirely or locally surrounded by a chamber (not shown), and the inside is depressurized (or vacuum), or a depressurized state of inert gas (or atmospheric pressure).
- the bonding can be performed under the special atmosphere.
- the article 4 is made of, for example, a chip
- the article 5 is made of, for example, a substrate.
- the chip refers to all forms of the side to be bonded to the substrate, regardless of the type and size, such as an IC chip, a semiconductor chip, an optical element, a surface mount component, and a wafer.
- bumps are formed on the article 4 as the metal joints 2.
- substrate refers to, for example, a resin substrate, a glass substrate, a film substrate, a chip, a wafer, or any other form that is to be bonded to a chip irrespective of its type and size.
- the positions of the chip and the substrate may be interchanged.
- a typical embodiment of the present invention is an embodiment in which at least one of the objects to be joined is made of a semiconductor.
- the above-mentioned washed workpieces 4 and 5 are transported and placed in a predetermined standby section 12 after being transported.
- the workpiece 4 is held on the head 14 of the reversing mechanism 13 by suction or the like so as not to touch the cleaning surface, and is turned upside down.
- the metal bonding part 2 is held by a bonding tool 16 provided below the binding head 15 by suction or the like in a form in which the metal bonding part 2 faces downward.
- the article 5 is transferred from the standby section 12 and held by, for example, suction on a bonding stage 17 with the metal joint 3 directed upward.
- the bonding tool 16 has a built-in heater 18 as a heating means, so that it is possible to perform both bonding at room temperature and bonding under heating in a special atmosphere or air. I'm in love.
- the bonding head 15 can be pressed downward by a pressurizing means 19 through the bonding tool 16 through the bonding tool 16. It can apply and control the joining pressure. In this embodiment, the bonding head 15 can be moved and positioned in the vertical direction (Z direction).
- the bonding stage 17 holding the article 5 is provided with a horizontal position control in the X and Y directions by a position adjustment table 20 provided at the lower part.
- a position adjustment table 20 provided at the lower part.
- the relative alignment and the parallelism adjustment are performed by the recognition means inserted between the workpieces 4 and 5 so as to be able to move forward and backward, for example, the two-view recognition means 21 (for example, a two-view camera), Alternatively, the recognition is performed by reading recognition marks (not shown) attached to the holding means, and performing necessary corrections of the position and the angle based on the read information.
- the two-field-of-view recognition means 21 can adjust the position in the X and Y directions, and in some cases, the Z direction.
- the relative positioning and the parallelism adjustment are mainly performed on the bonding stage 17 side, but it is also possible to perform the bonding on the bonding head 15 or the bonding tool 16 side. It is also possible to do it on both sides.
- means 19 for pressing at least one of the workpieces 4 (chips) for bonding is used.
- An elastic material 22 that allows deformation of the base material 4a of the workpiece 4 is interposed in a portion of the bonding tool 16 directly below the bonding tool 16 provided below the workpiece 19.
- a plurality of metal joints 2 are formed on the surface of the substrate 4a of the article 4 and on the lower surface of the substrate 4a in the holding posture shown in FIG. Below the object 4, the object 5 (substrate) is held on the bonding stage 17 in a state where the object 5 (substrate) faces the object 4.
- a plurality of metal joints 3 corresponding to the metal joints 2 of the article 4 are provided on the surface of a.
- the metal joints corresponding to each other are brought into contact with each other by pressurization by the pressurizing means 19, and are pressurized and joined.
- the metal joints 2, 3 formed on the workpieces 4, 5 have more or less variations in height.
- the joining method according to the present invention using the above-described joining apparatus is performed as follows. First, in a chamber 7 having a predetermined degree of vacuum, a metal bonding portion 2 (for example, a bump) of a chip 4 as a workpiece 4 and a metal bonding portion 3 (for example, a bump) of a substrate 5 as a workpiece 5
- the electrodes are cleaned by Ar plasma and the surface is activated. In plasma cleaning, the plasma irradiation intensity and time are set so that the entire surface of the metal joint can be etched by 1 nm or more in order to remove the surface foreign material layer and sufficiently activate the surface for subsequent bonding. Is preferably set.
- the chip 4 and the substrate 5 whose surfaces have been cleaned are temporarily placed on the standby unit 12, and the chip 4 is turned upside down to the bonding tool 16, and the substrate 5 is not turned upside down to the bonding stage 1 ⁇ ⁇ ⁇ ⁇ . Will be retained.
- the chip 4 and the substrate 5 held opposite to each other are aligned so as to be within a predetermined accuracy based on information read by the two-field recognition means 21 and the parallelism is adjusted so as to be within the predetermined accuracy. Is done.
- the bonding tool 16 is lowered, a predetermined bonding pressure is applied by the pressurizing means 19, and the bonding tool 16 is heated by the heater 18 if necessary, so that the metal bonding part 2 (bump) of the chip 4 and the substrate
- the metal joint 3 of 5 is joined, for example, in the atmosphere.
- the metal joints 2 and 3 formed on the workpieces 4 and 5 have more or less variation in height. Requires very high pressure to bring the corresponding all-metal joints into contact.
- the article 4 is pressed through the elastic member 22, as shown in FIG.
- the elastic material 22 itself also elastically deforms, so eventually the height variations of the metal joints 2 and 3 are automatically absorbed, and the corresponding all metal joints can be easily applied with a small pressing force. And will surely abut.
- the joining surface of each metal joint is cleaned in advance with a single energy wave and the surface is activated, so that the joining is performed well with a high bonding force. Then, since the all-metal joints are in contact with each other, reliable and good joining is performed with respect to the all-metal joints with such a small pressing force.
- bumps are formed on the chip 4 at a pitch of 100 as the metal joints 2, the bump heights vary by 4 ⁇ m, and the thickness of the Si substrate 4 a of the chip 4 is 5
- the above pressure bonding was performed for the case of 0, all the bumps were successfully bonded at a bonding pressure of 300 MPa or less. .
- this joining can be performed immediately by applying pressure via the elastic material 22 as described above, or at least after temporarily joining the workpieces 4 and 5 to each other at least once.
- One of the objects to be joined can also be fully joined by pressing it through the elastic member 22 as described above.
- the elastic material is used only on the upper side, but it is also possible to use the elastic material only on the stage side.
- the elastic member can be interposed on both the joints.
- an elastic material 22 is interposed on the lower surface side of the bonding tool 16 on the workpiece 4 side, and an elastic material 22 is provided on the upper surface side of the bonding stage 17 on the workpiece 5 side.
- 23 can be interposed. If the elastic material 22 and the elastic material 23 are interposed on both sides in this way, both the base material 4a of the bonded object 4 and the base material 5a of the bonded object 5 can be deformed.
- the joints are more securely abutted, and good joints are made with less pressure. It becomes possible.
- FIG. 5 shows a state immediately before the bonding after the energy wave cleaning in the bonding apparatus according to another embodiment of the present invention.
- a workpiece 3 2 for example, a chip
- An article 36 for example, a ceramic package
- FIG. 5 exaggerates the state in which the parallelism between the two workpieces 32 and 36 is not just before the welding. If pressure joining is performed as it is in such a state where the parallelism does not match, it is difficult to bring all metal joints 31 and 35 into good contact with each other, or an extremely large pressing force is required.
- one of the workpieces 32 is pressurized via the elastic material 34, and therefore, when pressurized, as shown in FIG.
- the workpiece 3 2 is displaced in the direction in which the all metal joints 31 and 35 come into close contact with each other, and the parallelism between the workpieces 32 and 36 is automatically corrected.
- the substantially all metal joints 31 and 35 are brought into good contact with each other with a relatively low pressure, and the joint in a desired form can be achieved.
- the metal joints 31 and 35 have been subjected to energy wave cleaning in advance, good adhesion between the metal joints 31 and 35 enables bonding at room temperature or a low temperature close thereto.
- the joining apparatus and method according to the present invention can be applied to all kinds of joining between objects to be joined having a metal joint, and are particularly suitable for joining when at least one of the objects to be joined is a semiconductor.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Wire Bonding (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003266601A AU2003266601A1 (en) | 2002-09-26 | 2003-09-25 | Connection method and connection device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2002-281112 | 2002-09-26 | ||
JP2002281112A JP2006080100A (ja) | 2002-09-26 | 2002-09-26 | 接合方法および装置 |
Publications (1)
Publication Number | Publication Date |
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WO2004030079A1 true WO2004030079A1 (ja) | 2004-04-08 |
Family
ID=32040503
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2003/012206 WO2004030079A1 (ja) | 2002-09-26 | 2003-09-25 | 接合方法および装置 |
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JP (1) | JP2006080100A (ja) |
AU (1) | AU2003266601A1 (ja) |
WO (1) | WO2004030079A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4318567A4 (en) * | 2021-03-30 | 2024-10-09 | Mitsui Mining & Smelting Co Ltd | MANUFACTURING METHOD FOR MULTILAYER SUBSTRATE AND WIRING SUBSTRATE |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5078424B2 (ja) * | 2007-05-09 | 2012-11-21 | 芝浦メカトロニクス株式会社 | 電子部品の実装装置 |
JP5316483B2 (ja) * | 2010-06-18 | 2013-10-16 | セイコーエプソン株式会社 | 光学デバイス、光学デバイスの製造方法、波長可変フィルタ、波長可変フィルタモジュール、および光スペクトラムアナライザ |
JP5543525B2 (ja) * | 2012-05-15 | 2014-07-09 | 国立大学法人東北大学 | 光学デバイスおよびその製造方法 |
JP5660740B2 (ja) * | 2013-03-14 | 2015-01-28 | アルファーデザイン株式会社 | 電子部品の接合方法 |
JP6656836B2 (ja) * | 2015-07-24 | 2020-03-04 | 新光電気工業株式会社 | 実装構造体及びその製造方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5090609A (en) * | 1989-04-28 | 1992-02-25 | Hitachi, Ltd. | Method of bonding metals, and method and apparatus for producing semiconductor integrated circuit device using said method of bonding metals |
JPH09321097A (ja) * | 1996-06-03 | 1997-12-12 | Matsushita Electric Ind Co Ltd | バンプ付きワークの押圧装置 |
JPH10173007A (ja) * | 1996-12-11 | 1998-06-26 | Mitsubishi Electric Corp | ベアチップ搭載装置 |
JPH1174230A (ja) * | 1997-08-29 | 1999-03-16 | Nippon Telegr & Teleph Corp <Ntt> | 薄膜半導体装置の製造方法 |
JP2001060602A (ja) * | 1999-08-23 | 2001-03-06 | Fuji Electric Co Ltd | フリップチップ実装構造及びその製造方法 |
WO2002017378A1 (fr) * | 2000-08-18 | 2002-02-28 | Toray Engineering Co., Ltd. | Procédé et dispositif de montage |
-
2002
- 2002-09-26 JP JP2002281112A patent/JP2006080100A/ja active Pending
-
2003
- 2003-09-25 AU AU2003266601A patent/AU2003266601A1/en not_active Abandoned
- 2003-09-25 WO PCT/JP2003/012206 patent/WO2004030079A1/ja not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5090609A (en) * | 1989-04-28 | 1992-02-25 | Hitachi, Ltd. | Method of bonding metals, and method and apparatus for producing semiconductor integrated circuit device using said method of bonding metals |
JPH09321097A (ja) * | 1996-06-03 | 1997-12-12 | Matsushita Electric Ind Co Ltd | バンプ付きワークの押圧装置 |
JPH10173007A (ja) * | 1996-12-11 | 1998-06-26 | Mitsubishi Electric Corp | ベアチップ搭載装置 |
JPH1174230A (ja) * | 1997-08-29 | 1999-03-16 | Nippon Telegr & Teleph Corp <Ntt> | 薄膜半導体装置の製造方法 |
JP2001060602A (ja) * | 1999-08-23 | 2001-03-06 | Fuji Electric Co Ltd | フリップチップ実装構造及びその製造方法 |
WO2002017378A1 (fr) * | 2000-08-18 | 2002-02-28 | Toray Engineering Co., Ltd. | Procédé et dispositif de montage |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4318567A4 (en) * | 2021-03-30 | 2024-10-09 | Mitsui Mining & Smelting Co Ltd | MANUFACTURING METHOD FOR MULTILAYER SUBSTRATE AND WIRING SUBSTRATE |
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AU2003266601A1 (en) | 2004-04-19 |
JP2006080100A (ja) | 2006-03-23 |
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