WO2005091363A1 - ヒートシンク基板とその製造方法 - Google Patents
ヒートシンク基板とその製造方法 Download PDFInfo
- Publication number
- WO2005091363A1 WO2005091363A1 PCT/JP2005/004861 JP2005004861W WO2005091363A1 WO 2005091363 A1 WO2005091363 A1 WO 2005091363A1 JP 2005004861 W JP2005004861 W JP 2005004861W WO 2005091363 A1 WO2005091363 A1 WO 2005091363A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat sink
- heat
- substrate
- coupling
- linear expansion
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
- H01L23/36—Selection of materials, or shaping, to facilitate cooling or heating, e.g. heatsinks
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2224/00—Indexing scheme for arrangements for connecting or disconnecting semiconductor or solid-state bodies and methods related thereto as covered by H01L24/00
- 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
- H01L2224/26—Layer connectors, e.g. plate connectors, solder or adhesive layers; Manufacturing methods related thereto
- H01L2224/31—Structure, shape, material or disposition of the layer connectors after the connecting process
- H01L2224/32—Structure, shape, material or disposition of the layer connectors after the connecting process of an individual layer connector
- H01L2224/321—Disposition
- H01L2224/32151—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive
- H01L2224/32221—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked
- H01L2224/32225—Disposition the layer connector connecting between a semiconductor or solid-state body and an item not being a semiconductor or solid-state body, e.g. chip-to-substrate, chip-to-passive the body and the item being stacked the item being non-metallic, e.g. insulating substrate with or without metallisation
Definitions
- the present invention relates to a heat sink substrate and a method of manufacturing the same, and more particularly to a heat sink substrate suitable for mounting an electronic component generating a large amount of heat and, in particular, for an electric vehicle or a power module for mounting a semiconductor component, and a method of manufacturing the same.
- a heat sink substrate on which a semiconductor component, which is an electronic component generating a large amount of heat, is mounted is basically made of copper (Cu), and is generally formed of a single plate.
- Cu copper
- This type was inexpensive because only one heat sink substrate was required, and the heat dissipation was good because of the copper material when viewed from the material side.
- Cu copper material
- ppmZ 16.6
- a copper-molybdenum (Cu-Mo) composite material with a small linear expansion coefficient of 9.2 (ppm / ° C) and relatively good heat dissipation is used instead of copper material. It is also known to form a heat sink substrate.
- Patent Document 1 Japanese Unexamined Patent Application Publication No. Hei 8-186204 discloses a mounting portion made of a material similar to the coefficient of thermal expansion of a semiconductor element and excellent heat conduction and heat dissipation characteristics. It discloses that a heat sink substrate provided with a heat dissipating member made of a different material, and in which the mounting member and the heat dissipating member are integrated by infiltration bonding by heating.
- Patent Document 2 Japanese Patent Application Laid-Open No. 6-777678 discloses that a hole is provided at a predetermined position in a base material formed of a nickel-iron alloy, and a heat dissipation member made of a copper-based metal is provided in the hole. It is disclosed to form an integrated heat sink substrate by embedding by screwing or press fitting.
- the heat sink substrate composed of a plurality of members described above must be in close contact with a heat source in order to efficiently release heat. Therefore, for example, when the heat source is a semiconductor, product accuracy such as flatness is required in order to mount the semiconductor by soldering.
- Patent Document 1 there is a problem that the joining method using heat, such as welding or brazing, has low joining accuracy due to thermal deformation or the like and requires machining of necessary parts such as soldering surfaces after joining. Atsuta. It was also disadvantageous in terms of energy loss due to the use of heat and material yield.
- the adhesiveness of the fastening portion between the base material and the heat dissipating member is low, and the effective screw length is small when the thickness is small such as a heat sink substrate.
- the press-fitting is applied with a deformation pressure due to the press-fitting of the heat dissipating member, which is a soft material, so that it is difficult to obtain flatness. In some cases, flat finishing is required, and there is no demerit in productivity and cost.
- An object of the present invention is to provide a heat sink substrate having high product accuracy and excellent productivity, and a method for manufacturing the same. Disclosure of the invention The present invention provides a heat sink substrate formed by joining a first heat sink with a second heat sink having a smaller linear expansion coefficient than the heat sink,
- the second heat sink is achieved by a chip member on which a semiconductor component is mounted.
- the first heat sink is achieved by forming a plastic coupling pressing groove on the coupling surface of the fitting boundary and receiving the second heat sink material.
- the first heat sink is made of a Cu-based material.
- the second heat sink is achieved by consisting of a Cu-Mo composite. According to the present invention, it is preferable that the second heat sink is formed by exposing the X-edge portion around the entire periphery by the concave indentation due to the plastic flow coupling.
- the second heat sink is achieved by fixing the semiconductor component by soldering.
- the present invention preferably achieves the following because plastic flow bonding is performed between the inner peripheral surface of the first heat sink and the outer peripheral surface of the second heat sink via a thermally conductive paste or wax. You.
- the present invention preferably achieves ⁇ Plastic flow bonding between the bottom surface of the first heat sink and the lower surface of the second heat sink via a thermally conductive paste or a plastic.
- the present invention relates to a method for manufacturing a heat sink substrate, comprising a first heat sink and a second heat sink having a smaller linear expansion coefficient than the heat sink.
- the second heat sink is fitted into a fitting hole provided in the first heat sink, and then the first heat sink is brought into contact with the second heat sink by a coupling punch descending along an outer peripheral wall of the second heat sink. This is achieved by locally plastically deforming the members around the heat sink to cause plastic flow coupling.
- the second heat sink is fitted into the first heat sink fitting hole, and the first heat sink at the fitting boundary is formed as a heat sink substrate that is plastically deformed and coupled to the second heat sink.
- the connection between the two members can be performed at room temperature, and a heat sink substrate made of a composite member with high planar accuracy can be easily and reliably provided.
- the first heat sink is fitted with the second heat sink, and then the first heat sink is brought into contact with the second heat sink by a coupling punch descending along the outer peripheral wall of the second heat sink. Since the heat sink substrate is obtained by locally plastically deforming the material around the heat sink and performing plastic flow bonding, the plastic bonding press groove (near the second heat sink (chip) formed at the time of bonding) is obtained. Indentations can be prevented from occurring when mounting semiconductors without using special jigs, and a highly productive heat sink for mounting heat-generating components can be provided.
- FIG. 1 is a perspective view of a heat sink substrate showing one embodiment of the present invention.
- FIG. 2 is a partial longitudinal sectional view of FIG.
- FIG. 3 is a longitudinal sectional view of one embodiment of a power module structure according to the present invention.
- FIG. 4 is a perspective view of a first heat sink constituting the present invention.
- FIG. 5 is a perspective view of a second heat sink constituting the present invention.
- FIG. 6 is a longitudinal sectional view showing a fitted state of members before a heat sink is connected according to the manufacturing method of the present invention.
- FIG. 7 is a vertical cross-sectional view of a heat sink according to the manufacturing method of the present invention just before coupling.
- FIG. 8 is a longitudinal sectional view of the heat sink according to the manufacturing method of the present invention at the time of completion of the press-fitting.
- FIG. 9 is a perspective view of a heat sink substrate according to a second embodiment of the present invention.
- FIG. 10 is a vertical cross-sectional view of a heat sink according to a third embodiment of the present invention at the time of completion of the pressure connection.
- FIG. 11 is a vertical cross-sectional view of a heat sink according to a fourth embodiment of the present invention at the time of completion of press-fitting.
- the present invention is not limited to the present embodiment, but is widely applied to a heat sink substrate on which a heat-generating component is mounted.
- FIG. 1 is a perspective view of an embodiment of a heat sink structure according to the present invention
- FIG. 2 is an enlarged longitudinal sectional view of a main part of FIG. 1
- FIG. 3 is a longitudinal sectional view of a power module having a semiconductor mounted on a heat sink. It is.
- the heat sink substrate 1 shown in FIGS. 1 and 2 has a smaller linear expansion coefficient than the plate-like first heat sink 2 made of a copper (Cu) material and Cu such as a Cu—Mo composite material. It comprises a second heat sink 3 made of a material.
- Cu copper
- Mo copper
- the first heat sink 2 has a plurality of through holes 3 according to the mounted components.
- the second heat sink 3 which is a disc-shaped tip member, is fitted into the hole 3 and is plastically deformed and integrated. As shown in FIG. 2, the second heat sink 3 is fitted to the first heat sink 2 so that the mounting surface 5 of the electronic component is flush with the first heat sink 2, and the first heat sink near the fitting boundary The entire circumference of the member 3 is pressed to plastically couple the two members.
- FIG. 3 shows a mounting state in which semiconductor components are mounted on the second heat sink of the heat sink substrate 1.
- a semiconductor is mounted on the heat sink substrate 1 as shown in FIG. 3, and heat generated by the semiconductor is mainly radiated from the heat sink substrate 1.
- a Cu plate 10 is joined to the end face 5 of the second heat sink 4 by solder 11, and a key nitride plate 13 is joined to it by Ag solder 12. Further, a Cu plate 15 is joined via an Ag solder 14, and a semiconductor chip 17 is mounted thereon by solder 16.
- the semiconductor chip 17 is actually provided with electric wiring such as an aluminum wire to constitute a semiconductor device.
- a heat sink made of a material having a smaller linear expansion coefficient than Cu such as a Cu—Mo composite material
- the semiconductor components are joined thereon by soldering.
- cracks do not occur in the solder 11 due to the difference in linear expansion coefficient at high temperatures, and the use of expensive Cu-Mo composite materials is minimal, realizing resource saving and extremely reasonable.
- Device made of a material having a smaller linear expansion coefficient than Cu, such as a Cu—Mo composite material
- solder 11 flows into the end face 5 of the second heat sink 3 to solder the Cu plate 10 constituting the semiconductor, but the second heat sink 3 is applied to the first heat sink 2 by the pressing force of the mold.
- An annular pressing mark (recess) 6 generated at the time of plastic deformation coupling prevents the solder from flowing out to the outer periphery.
- the corners of the second heat sink 3 are formed by the pressing marks (recesses) 6.
- 3 Exposed 1 and apparently second heat sink 3 protrudes from first heat sink 2, so when molten solder flows, solder does not flow out from end face 5 of second heat sink 3 due to surface tension Therefore, it can be easily soldered.
- the heat sink 3 of FIG. 6 is placed on the lower mold 7 in a state of being fitted in the fitting hole 4 of the first heat sink 2 as shown in FIG. Cu is soft and easy to plastically deform, and (: !! ⁇ is a combination that is suitable for plastic flow coupling because it is too hard.
- the fitting hole 4 of the first heat sink 2 The hardness difference between the two can be ensured even when the fitting hole 4 is work-hardened by pressing, and there is no practical problem.
- the outer periphery of the second heat sink 3 that is, the entire periphery near the inner periphery of the fitting hole 4 of the first heat sink 2 is locally pressurized by an annular punch 8, as shown in FIG.
- the material of the first heat sink 2 is caused to plastically flow, and the heat sinks 2 and 3 are sealed with a ⁇ ⁇ -shaped deformation pressure and tightly joined by a tension force.
- the punch 8 is removed, the heat sink substrate 1 is completed.
- the heat sink substrate 1 thus formed is attached to the side of the second heat sink 3 with a slight punch force when the first heat sink 3 is joined to the first heat sink 2. Since the material can be plastically flowed, it does not affect the parallelism of the heat sink substrate, and a heat sink substrate with extremely high product accuracy can be obtained.
- the second heat sink 3 is desirably disc-shaped, as shown in FIG. It may be rectangular as shown or elliptical.
- the hole 6 of the first heat sink 2 may be a blind hole that does not penetrate.
- FIG. 10 shows that the second heat sink 31 is placed in the through hole of the first heat sink 21 via a heat conductive paste or wax 20 (a silicon paste is generally used). It is a plastic flow connection between the two. In general, plastic flow bonding of metal simply involves local pressing of the periphery of the connected part by a punch as shown in Figs. 7 and 8, and the intensively pressed member is caused to flow vertically. Therefore, the material far from the tip of the punch has almost no plastic change.
- annular groove is provided in a substantially central portion of the first heat sink 21 or the second heat sink 31 where a plastic deformation pressure is not applied, and a heat conductive paste or wax 2 is provided there.
- punches are added from both sides, and the heat conduction function with the second heat sink 31 is further increased, thereby making the heat sink substrate highly practical.
- the annular pressing marks (recesses) 61 and 62 formed by the punch are formed on both sides.
- the punch generally presses the boundary between the two members, but an arbitrary position is selected depending on the thickness of the plate or the arrangement of the heat conductive paste or wax 20 as shown in the figure.
- FIG. 11 is based on the problem of the fourth embodiment, and is shown in FIG. —Applied to Tosink 22 and filling the bottom of the blind hole or the bottom of the second heat sink 3 with a heat conductive base or wax 23 beforehand, A second heat sink 3 with a small diameter or an equivalent diameter is placed, and then the boundary between the two members is pressed with a punch, and the member immediately below the punch is vertically plastically deformed in the direction of the second heat sink 32. The heat conductive paste 23 is compressed and the confidentiality is improved.
- the second heat sink 3 is plastically flow-coupled to the first heat sink 2 to form the heat sink substrate 1, and then the electronic components are mounted in the state of the heat sink substrate 1.
- plastic flow coupling which enables high-precision bonding at room temperature
- the electronic components are first mounted on the second heat sink 3, and then the second heat sink 3 is plastically coupled to the first heat sink 2. You may. Industrial applicability
- the present invention is a heat sink substrate particularly suitable for mounting an electronic component generating a large amount of heat, particularly for an inverter for an electric vehicle mounting a semiconductor component, or a power module.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP05721048A EP1729342A4 (en) | 2004-03-18 | 2005-03-11 | THERMOCONDUCTIVE TABLE AND ITS MANUFACTURING METHOD |
JP2006511230A JP4415988B2 (ja) | 2004-03-18 | 2005-03-11 | パワーモジュール、ヒートシンク及びヒートシンクの製造方法 |
US10/587,480 US7468554B2 (en) | 2005-03-11 | 2005-03-11 | Heat sink board and manufacturing method thereof |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004077371 | 2004-03-18 | ||
JP2004-77371 | 2004-03-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005091363A1 true WO2005091363A1 (ja) | 2005-09-29 |
Family
ID=34993973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2005/004861 WO2005091363A1 (ja) | 2004-03-18 | 2005-03-11 | ヒートシンク基板とその製造方法 |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1729342A4 (ja) |
JP (1) | JP4415988B2 (ja) |
WO (1) | WO2005091363A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7910952B2 (en) * | 2006-09-28 | 2011-03-22 | Infineon Technologies Ag | Power semiconductor arrangement |
JP2015198245A (ja) * | 2014-04-01 | 2015-11-09 | 崇賢 ▲黄▼ | 放熱装置及びその製造方法 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8233281B2 (en) * | 2007-12-17 | 2012-07-31 | Telefonaktiebolaget L M Ericsson (Publ) | Device for reducing thermal stress on connection points |
DE102011081687A1 (de) * | 2011-08-26 | 2013-02-28 | Robert Bosch Gmbh | Halbleiterbauelement mit einem Kühlkörper |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08186204A (ja) * | 1994-11-02 | 1996-07-16 | Nippon Tungsten Co Ltd | ヒートシンク及びその製造方法 |
JPH09225562A (ja) * | 1996-02-17 | 1997-09-02 | Arai:Kk | 金属片へのピン取付構造及び方法 |
JPH11317478A (ja) * | 1998-02-25 | 1999-11-16 | Suzuki Co Ltd | 半導体装置用ヒ―トスプレッダと半導体装置用パッケ―ジ |
JP2000077582A (ja) * | 1998-08-31 | 2000-03-14 | Kawai Musical Instr Mfg Co Ltd | 放熱材 |
JP2000151163A (ja) * | 1998-11-18 | 2000-05-30 | Showa Alum Corp | ヒートシンクの製造法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3611548B2 (ja) * | 2002-02-20 | 2005-01-19 | Tdk株式会社 | スイッチング電源とその製造方法 |
-
2005
- 2005-03-11 EP EP05721048A patent/EP1729342A4/en not_active Withdrawn
- 2005-03-11 WO PCT/JP2005/004861 patent/WO2005091363A1/ja not_active Application Discontinuation
- 2005-03-11 JP JP2006511230A patent/JP4415988B2/ja not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH08186204A (ja) * | 1994-11-02 | 1996-07-16 | Nippon Tungsten Co Ltd | ヒートシンク及びその製造方法 |
JPH09225562A (ja) * | 1996-02-17 | 1997-09-02 | Arai:Kk | 金属片へのピン取付構造及び方法 |
JPH11317478A (ja) * | 1998-02-25 | 1999-11-16 | Suzuki Co Ltd | 半導体装置用ヒ―トスプレッダと半導体装置用パッケ―ジ |
JP2000077582A (ja) * | 1998-08-31 | 2000-03-14 | Kawai Musical Instr Mfg Co Ltd | 放熱材 |
JP2000151163A (ja) * | 1998-11-18 | 2000-05-30 | Showa Alum Corp | ヒートシンクの製造法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1729342A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7910952B2 (en) * | 2006-09-28 | 2011-03-22 | Infineon Technologies Ag | Power semiconductor arrangement |
JP2015198245A (ja) * | 2014-04-01 | 2015-11-09 | 崇賢 ▲黄▼ | 放熱装置及びその製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP1729342A4 (en) | 2009-11-11 |
JPWO2005091363A1 (ja) | 2008-02-07 |
JP4415988B2 (ja) | 2010-02-17 |
EP1729342A1 (en) | 2006-12-06 |
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