WO2007129715A1 - アルミニウム-炭化珪素質複合体及びその加工方法 - Google Patents
アルミニウム-炭化珪素質複合体及びその加工方法 Download PDFInfo
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- WO2007129715A1 WO2007129715A1 PCT/JP2007/059530 JP2007059530W WO2007129715A1 WO 2007129715 A1 WO2007129715 A1 WO 2007129715A1 JP 2007059530 W JP2007059530 W JP 2007059530W WO 2007129715 A1 WO2007129715 A1 WO 2007129715A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
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- C22C29/065—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on carbides or carbonitrides based on carbides, but not containing other metal compounds based on SiC
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Definitions
- the present invention relates to an aluminum-silicon carbide composite suitable as a base plate for a power module and a processing method thereof.
- a copper or aluminum metal circuit is provided on the surface of a ceramic substrate such as an aluminum nitride substrate or a silicon nitride substrate having high insulation and high thermal conductivity, and a copper or aluminum metal heat sink is provided on the back surface.
- a ceramic circuit board on which is formed is used as a power module substrate.
- a typical heat dissipation structure of a conventional power module is formed by soldering a base plate to a ceramic circuit board, and copper and aluminum are generally used as the base plate.
- copper and aluminum are generally used as the base plate.
- heat dissipation is insufficient.
- problems such as malfunction or damage of the semiconductor on the circuit.
- Patent Document 1 Japanese Patent Application No. 3-509860.
- the present invention has been made in view of the above situation, and an object of the present invention is to provide an aluminum-silicon carbide composite suitable as a base plate for a power module and a processing method thereof.
- the present invention has the following gist.
- An aluminum monosilicon carbide composite obtained by impregnating a flat silicon carbide porous body with a metal mainly composed of aluminum,
- Both main surfaces have aluminum layers made of a metal mainly composed of aluminum,
- a method of processing an aluminum silicon carbide composite comprising impregnating a flat silicon carbide porous body with a metal mainly composed of aluminum,
- the side surface portion and the hole portion of the aluminum silicon carbide composite are processed by a water jet so that both main surfaces have an aluminum layer made of a metal containing aluminum as a main component and are made of a metal containing aluminum as a main component.
- the aluminum-silicon carbide based composite of the present invention has a feature that it can be mounted easily with little dimensional change due to solder adhesion during mounting by not having an aluminum layer made of an aluminum alloy on the side surface.
- by processing the aluminum-silicon carbide composite part with a water jet it is possible to suppress the generation of cracks due to the release of stress during processing without the generation of thermal stress accompanying processing, and to easily add complex shapes.
- Special feature In addition to the length, the processing time is reduced.
- FIG. 1 is a schematic plan view of an aluminum-silicon carbide composite material processed in Examples 1 to 3 and Comparative Example 1.
- FIG. 2 is a schematic plan view of the SiC preform used in Comparative Example 2.
- the method for producing the aluminum-silicon carbide composite used in the present invention there is no particular problem as long as it is an impregnation method in which a silicon carbide porous body is impregnated with an aluminum alloy, or a molten forging method, Manufacturing force by a known method such as a high pressure forging method such as a die-casting method S Possible force S From the viewpoint of productivity, the molten metal forging method is preferable.
- the method for producing a porous silicon carbide molded body (hereinafter also referred to as SiC preform) according to the present invention can be produced by a known method without any particular limitation.
- SiC preform a porous silicon carbide molded body
- SiC powder silicon carbide powder
- the SiC powder used in the present invention may be a powder produced by a known production method such as a gas phase method or an Atchison method.
- the particle size distribution is not particularly limited and may be used alone or after adjusting the particle size.
- a mixed powder in which SiC coarse powder having an average particle size of 40 ⁇ ⁇ ⁇ or more is preferably 40 to 80% by mass and preferably SiC fine powder having an average particle size of 15 ⁇ m or less is preferably 60 to 20% by mass. Is given as an example.
- the molding method for shaping the SiC powder according to the present invention into a predetermined shape there is no particular limitation on the molding method for shaping the SiC powder according to the present invention into a predetermined shape, and press molding, extrusion molding, squeeze molding, etc. can be used, and for shape retention as necessary.
- a binder can be used in combination.
- drying method it is possible to dry one sheet at a time or by using a spacer such as carbon with a shape equal to the shape of the preform between the SiC powder compacts to form a warped shape due to drying. Can prevent changes. Also, with regard to firing, it is possible to prevent changes in shape due to changes in internal structure by performing the same treatment as during drying.
- the relative density of the SiC preform after firing is preferably in the range of 5 to 75%.
- the strength of the SiC preform is preferably 3 MPa or more in bending strength, more preferably 5 MPa or more in order to prevent cracking during handling or impregnation. If the firing temperature is 800 ° C or higher, more preferably 900 ° C or higher, a preform having a bending strength of 3 MPa or higher, which is related to the atmosphere during firing, can be obtained. However, in an oxidizing atmosphere, firing at a temperature exceeding 1100 ° C promotes the oxidation of SiC, which may reduce the thermal conductivity of the aluminum-silicon carbide composite. In an acidic atmosphere, firing is preferably performed at a temperature of 1100 ° C or lower. The firing time is appropriately determined depending on conditions such as the size of the SiC preform, the amount charged into the firing furnace, and the firing atmosphere.
- the size of the SiC preform needs to be larger than the final dimension. If the preform size is smaller than the final size, the aluminum alloy layer may remain on one or more side surfaces when the impregnated aluminum-silicon carbide composite is processed with a water jet.
- SiC preforms were stacked in a predetermined form so that they would become a predetermined size when the aluminum alloy was impregnated, and were recorded as a single block.
- it since it is processed using a water jet after impregnation, it is preferable from the viewpoint of productivity that it is not necessary to use a mold during impregnation.
- it is necessary to use a formwork larger than the final dimension.
- the SiC preform-laminated block After preheating the SiC preform-laminated block at about 500 to 650 ° C, place one or more in the high-pressure vessel, and melt the aluminum alloy as quickly as possible to prevent the temperature of the block from decreasing.
- the aluminum alloy is impregnated in the voids of the SiC preform by pressurizing at a pressure of preferably 30 MPa or more, more preferably 35 MPa or more. Thereafter, the impregnated block is cut out to obtain an aluminum monosilicon carbide composite having an aluminum alloy layer on the entire surface. Annealing may be performed for the purpose of removing distortion during impregnation. For annealing, an aluminum alloy layer and a silicon carbide composite There is also an effect of strengthening the bonding.
- the aluminum alloy in the aluminum-silicon carbide composite of the present invention preferably has a melting point as low as possible in order to sufficiently penetrate into the voids of the preform when impregnated.
- Such aluminum alloy for example, silicon 7 to 25 mass 0/0, preferably 9 to: include 15 wt% containing aluminum alloy.
- magnesium when magnesium is contained, since the bond between the silicon carbide grains and the metal part becomes stronger, the preferred content is 0.5 to 0.9% by mass. 0.7 to 0 9% by mass is more preferable.
- metal components other than aluminum, silicon, and magnesium in the aluminum alloy there is no particular limitation as long as the characteristics do not change extremely. For example, copper may be included.
- the annealing treatment for the purpose of strain removal after impregnation with the aluminum alloy is preferably performed at a temperature of 400 to 550 ° C, preferably 500 to 550 ° C for 10 minutes or more, preferably 30 minutes or more. . If the annealing temperature is less than 400 ° C, the distortion inside the composite may not be sufficiently released, and the warpage may change greatly in the subsequent steps. On the other hand, if the annealing temperature exceeds 550 ° C, the aluminum alloy used for impregnation may melt. If the annealing time is less than 10 minutes, even if the annealing temperature is 400 to 550 ° C, the distortion inside the composite is not sufficiently released, and the warpage may change greatly in the subsequent steps.
- the important characteristics of the aluminum-silicon carbide composite are thermal conductivity and thermal expansion coefficient. Higher SiC content in the aluminum-silicon carbide composite is preferable because the thermal conductivity is higher and the thermal expansion coefficient is smaller, but if the content is higher, the aluminum alloy may not be sufficiently impregnated.
- the aluminum silicon carbide based composite of the present invention has an aluminum layer made of an aluminum alloy on both principal surfaces. This aluminum layer is necessary to ensure plating adhesion during the plating process.
- the average thickness of the aluminum layer is preferably 10 to 150 zm, more preferably l OO xm or less. If the average thickness is less than 10 xm, the aluminum monosilicon carbide composite is partially exposed during the subsequent surface treatment such as pre-plating treatment, and the plating is not deposited or the plating adhesion is deteriorated. Case force S is. On the other hand, when the average thickness exceeds 150 zm, the thermal expansion coefficient of the obtained base plate itself becomes too large, and the reliability of the joint may be lowered.
- the aluminum silicon carbide based composite of the present invention is characterized in that it does not have an aluminum layer made of an aluminum alloy on its side surface. In contrast to the case where the aluminum layer remains on the side surface, when there is no aluminum layer on the side surface, the solder adhering to the side surface after plating can be easily removed. It can be easily mounted on a miniaturized power module.
- the side surface of the aluminum-silicon carbide composite is preferably the case where the entire surface does not have an aluminum layer. However, in the present invention, the entire side surface does not necessarily have an aluminum layer. Even if you do not, it will have some effect. In the present invention, the case where the area of the side surface is preferably 20% or more, more preferably 30% or more without an aluminum layer is particularly suitable.
- a water jet used for processing an aluminum silicon carbide composite to a final size uses abrasive grains such as garnet as an abrasive.
- the average grain size of the abrasive is 80 to 150 / im, preferably 100 to 130 / im.
- the pressure during processing (water pressure) and the processing speed are appropriately determined according to the thickness of the aluminum-silicon carbide composite. For example, when the thickness of the ano-remineum silicon carbide composite is 3 to 5 mm, the water pressure is preferably 200 to 300 MPa, more preferably 200 to 250 MPa, and the cache speed force is 00 mm / min or less, more preferably 80 mm / min. It is common to do it below min. If the pressure is less than 200MPa or the processing speed exceeds 100mm / min, cutting failure or dimensional difference between the processed surface and the back surface may increase, resulting in processing failure.
- the diameter of the water jet processing machine can be reduced, or the nose head can be moved away from the object. It is effective to process with an inclination.
- An example of the processing conditions is that when the aluminum-silicon carbide composite is 5 mm thick, and water jet processing is performed at a water pressure of 200 MPa and a processing speed of lOOmmZmin, the dimensional difference between the two main surfaces is kept within 0.6 mm.
- force the abrasive nozzle diameter to be 1. Omm or less 3 ° to 20 ° from the perpendicular direction to the workpiece. Tilt.
- the aluminum-silicon carbide composite according to the present invention has an aluminum alloy layer on the side surface. By not doing so, it has the feature that it can be mounted easily with little dimensional change due to solder adhesion during mounting.
- SiC powder A (manufactured by Taiheiyo Random: NG—220, average particle size: 60 im) 70 g
- SiC powder B (manufactured by Yakushima Electric: GC—1000F, average particle size: 10 ⁇ ) 30 ⁇
- silica sol (Nissan Chemical Co., Ltd .: Snowtex) 10 g was weighed and mixed with a stirring mixer for 30 minutes, and then press-molded into a flat plate having dimensions of 19 Omm ⁇ 140 mm ⁇ 5.0 mm under pressure lOMPa.
- the obtained molded body was fired at 900 ° C for 2 hours in the atmosphere to obtain a SiC preform having a relative density of 65%.
- the obtained SiC preform was integrated by sandwiching both sides of a carbon-coated SUS plate and preheated to 600 ° C in an electric furnace. Next, it was placed in a pre-heated 300 mm inner diameter press die, poured with a molten aluminum alloy containing 12% by mass of silicon and 0.5% by mass of magnesium, and pressurized at a lOOMPa pressure for 20 minutes. The SiC preform was impregnated with an aluminum alloy.
- the aluminum-silicon carbide composite was processed into the shape shown in FIG. With water jet (Abrasive 'Jet Cutter NC' manufactured by Sugino Machine Co., Ltd.), pressure 250MPa, Caloe speed 50mm / min, abrasive nozzle diameter 1.2mm, nozzle head fixed Then, a garnet having a particle size of 100 ⁇ was used as an abrasive, and processing was performed so that an aluminum layer made of an aluminum alloy was removed on the side surface.
- water jet Abrasive 'Jet Cutter NC' manufactured by Sugino Machine Co., Ltd.
- An aluminum silicon carbide composite was produced in the same manner as in Example 1, and water jet processing was performed under the same conditions as in Example 1 except that the diameter of the abrasive nose was 0.8 mm.
- Example 1 A water-jet jet process was performed under the same conditions as in Example 1 except that an aluminum monosilicon carbide composite was prepared in the same manner as in Example 1, and the Nozure head was tilted 10 ° outward from the body to be calendered. Went.
- the aluminum monosilicon carbide composite of Example 1 was processed into the shape shown in FIG. 1 by machining (HX400iF, manufactured by Kitamura Machinery Co., Ltd.).
- An aluminum-silicon carbide composite was prepared in the same manner as in Example 1 except that a flat SiC preform having a dimension (unit: mm) shown in FIG. 2 and a thickness of 5. Omm was used. In the same way, the shape of Fig. 1 was processed with a water jet. There was an lmm aluminum alloy layer on the side of the aluminum-silicon carbide composite of this comparative example.
- the aluminum silicon carbide based composite of the present invention can be processed with a water jet, crack generation due to stress release during processing can be suppressed, and a complicated shape can be easily added. Since it has the effect of reducing the processing time, it can be used as a base plate for a power module for mounting a semiconductor component that requires high reliability. It should be noted that the entire contents of the Akita Book, 2006-130044 filed on May 9th, 2006, and the claims, drawings, and abstract are cited herein, and the specification of the present invention is disclosed. It is included as an indication.
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Abstract
Description
Claims
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2008514499A JP5021636B2 (ja) | 2006-05-09 | 2007-05-08 | アルミニウム−炭化珪素質複合体及びその加工方法 |
| US12/299,143 US20090075056A1 (en) | 2006-05-09 | 2007-05-08 | Aluminum-silicon carbide composite body and method for processing the same |
| EP07742965A EP2017886A4 (en) | 2006-05-09 | 2007-05-08 | ALUMINUM SILICON CARBON COMPOSITE BODY AND METHOD FOR ITS PROCESSING |
| KR1020087017539A KR101334503B1 (ko) | 2006-05-09 | 2007-05-08 | 알루미늄-탄화규소질 복합체 및 그 가공 방법 |
| CN2007800159783A CN101438401B (zh) | 2006-05-09 | 2007-05-08 | 铝-碳化硅质复合体及其加工方法 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006130044 | 2006-05-09 | ||
| JP2006-130044 | 2006-05-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2007129715A1 true WO2007129715A1 (ja) | 2007-11-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/059530 Ceased WO2007129715A1 (ja) | 2006-05-09 | 2007-05-08 | アルミニウム-炭化珪素質複合体及びその加工方法 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20090075056A1 (ja) |
| EP (1) | EP2017886A4 (ja) |
| JP (1) | JP5021636B2 (ja) |
| KR (1) | KR101334503B1 (ja) |
| CN (1) | CN101438401B (ja) |
| WO (1) | WO2007129715A1 (ja) |
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| JP2009149455A (ja) * | 2007-12-19 | 2009-07-09 | Denki Kagaku Kogyo Kk | アルミニウム−セラミックス複合体及びその製造方法 |
| JP2012171838A (ja) * | 2011-02-22 | 2012-09-10 | Denki Kagaku Kogyo Kk | アルミニウム−炭化珪素質複合体の製造方法 |
| CN103658659A (zh) * | 2013-12-05 | 2014-03-26 | 湖南航天诚远精密机械有限公司 | 双面覆铝铝碳化硅igbt基板的近净成形方法 |
| JP2016007634A (ja) * | 2014-06-25 | 2016-01-18 | デンカ株式会社 | アルミニウム−炭化珪素質複合体及びその製造方法 |
| US10919811B2 (en) | 2015-07-31 | 2021-02-16 | Denka Company Limited | Aluminum-silicon-carbide composite and method of manufacturing same |
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| CN102714054B (zh) * | 2009-11-02 | 2015-04-22 | V·V·列昂季耶夫 | 信息存储和处理装置 |
| CN102876910B (zh) * | 2012-09-29 | 2014-01-01 | 北京科技大学 | 一种高硅铝合金的制备方法 |
| JP6839981B2 (ja) * | 2014-07-24 | 2021-03-10 | デンカ株式会社 | 複合体及びその製造方法 |
| KR101737218B1 (ko) * | 2015-09-21 | 2017-05-17 | 한국과학기술원 | 탄화규소 타일/알루미늄 하이브리드 복합재 및 이의 제조방법 |
| US10058746B1 (en) * | 2017-04-26 | 2018-08-28 | Hung-Tao Peng | Manufacturing method of golf strike pad and the components of the golf strike pad made by the same manufacturing method |
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| JP7050978B1 (ja) * | 2021-02-26 | 2022-04-08 | デンカ株式会社 | 成形体及びその製造方法 |
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| CN115647046B (zh) * | 2022-11-17 | 2024-03-29 | 广东工业大学 | 一种高强和高模量的碳化硅颗粒增强铝基复合带材及其基于小吨位冷轧机的制备方法和应用 |
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- 2007-05-08 WO PCT/JP2007/059530 patent/WO2007129715A1/ja not_active Ceased
- 2007-05-08 JP JP2008514499A patent/JP5021636B2/ja active Active
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| JP2012171838A (ja) * | 2011-02-22 | 2012-09-10 | Denki Kagaku Kogyo Kk | アルミニウム−炭化珪素質複合体の製造方法 |
| CN103658659A (zh) * | 2013-12-05 | 2014-03-26 | 湖南航天诚远精密机械有限公司 | 双面覆铝铝碳化硅igbt基板的近净成形方法 |
| JP2016007634A (ja) * | 2014-06-25 | 2016-01-18 | デンカ株式会社 | アルミニウム−炭化珪素質複合体及びその製造方法 |
| US10919811B2 (en) | 2015-07-31 | 2021-02-16 | Denka Company Limited | Aluminum-silicon-carbide composite and method of manufacturing same |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20090008177A (ko) | 2009-01-21 |
| CN101438401A (zh) | 2009-05-20 |
| EP2017886A1 (en) | 2009-01-21 |
| US20090075056A1 (en) | 2009-03-19 |
| JPWO2007129715A1 (ja) | 2009-09-17 |
| EP2017886A4 (en) | 2012-10-17 |
| KR101334503B1 (ko) | 2013-11-29 |
| CN101438401B (zh) | 2013-08-28 |
| JP5021636B2 (ja) | 2012-09-12 |
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