CN1759078A - 具有高导热性的受热器 - Google Patents
具有高导热性的受热器 Download PDFInfo
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- CN1759078A CN1759078A CNA200480006559XA CN200480006559A CN1759078A CN 1759078 A CN1759078 A CN 1759078A CN A200480006559X A CNA200480006559X A CN A200480006559XA CN 200480006559 A CN200480006559 A CN 200480006559A CN 1759078 A CN1759078 A CN 1759078A
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- diamond
- tamanori
- matrix material
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- 229910003460 diamond Inorganic materials 0.000 claims abstract description 54
- 239000010432 diamond Substances 0.000 claims abstract description 54
- 238000000034 method Methods 0.000 claims abstract description 30
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 16
- 239000004065 semiconductor Substances 0.000 claims abstract description 15
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 238000001764 infiltration Methods 0.000 claims abstract description 5
- 230000008595 infiltration Effects 0.000 claims abstract description 5
- 239000011159 matrix material Substances 0.000 claims description 24
- 239000002245 particle Substances 0.000 claims description 24
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 12
- 150000001875 compounds Chemical class 0.000 claims description 9
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 229910052737 gold Inorganic materials 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 7
- 239000000956 alloy Substances 0.000 claims description 7
- 229910052710 silicon Inorganic materials 0.000 claims description 7
- 239000010703 silicon Substances 0.000 claims description 7
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 238000005336 cracking Methods 0.000 claims description 6
- 229910017982 Ag—Si Inorganic materials 0.000 claims description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- ORILYTVJVMAKLC-UHFFFAOYSA-N adamantane Chemical compound C1C(C2)CC3CC1CC2C3 ORILYTVJVMAKLC-UHFFFAOYSA-N 0.000 claims description 4
- 229910001573 adamantine Inorganic materials 0.000 claims description 4
- 230000005496 eutectics Effects 0.000 claims description 4
- 150000002739 metals Chemical class 0.000 claims description 4
- 229910052759 nickel Inorganic materials 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 claims description 2
- 239000000377 silicon dioxide Substances 0.000 claims description 2
- 229910000838 Al alloy Inorganic materials 0.000 claims 4
- 229910001020 Au alloy Inorganic materials 0.000 claims 4
- 238000010438 heat treatment Methods 0.000 claims 3
- 229910001316 Ag alloy Inorganic materials 0.000 claims 2
- 229920001296 polysiloxane Polymers 0.000 claims 2
- 230000001681 protective effect Effects 0.000 claims 2
- 239000000126 substance Substances 0.000 claims 2
- 238000005470 impregnation Methods 0.000 claims 1
- 239000003973 paint Substances 0.000 claims 1
- 239000002131 composite material Substances 0.000 abstract description 8
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 abstract 2
- 239000000463 material Substances 0.000 description 14
- 239000000843 powder Substances 0.000 description 12
- 239000010949 copper Substances 0.000 description 9
- 229910052709 silver Inorganic materials 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000012856 packing Methods 0.000 description 5
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 238000005538 encapsulation Methods 0.000 description 4
- 239000002243 precursor Substances 0.000 description 4
- 238000003786 synthesis reaction Methods 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 3
- 229910052749 magnesium Inorganic materials 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910017083 AlN Inorganic materials 0.000 description 2
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical group [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910001218 Gallium arsenide Inorganic materials 0.000 description 2
- 229910052796 boron Inorganic materials 0.000 description 2
- 238000005266 casting Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000000626 liquid-phase infiltration Methods 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910015365 Au—Si Inorganic materials 0.000 description 1
- 229910017770 Cu—Ag Inorganic materials 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- XACAZEWCMFHVBX-UHFFFAOYSA-N [C].[Mo] Chemical compound [C].[Mo] XACAZEWCMFHVBX-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- SBYXRAKIOMOBFF-UHFFFAOYSA-N copper tungsten Chemical compound [Cu].[W] SBYXRAKIOMOBFF-UHFFFAOYSA-N 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000000280 densification Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229910052733 gallium Inorganic materials 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000005088 metallography Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 238000001778 solid-state sintering Methods 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
- C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
- C04B35/528—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite obtained from carbonaceous particles with or without other non-organic components
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- H01L23/34—Arrangements for cooling, heating, ventilating or temperature compensation ; Temperature sensing arrangements
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- Powder Metallurgy (AREA)
Abstract
本发明涉及一种由含有金刚石复合材料制成的受热器。除了40~90体积%的金刚石含量以外,该复合材料还包含0.005~12体积%的硅-碳化合物,7~49体积%的Ag-,Au-或Al-富集相和低于5体积%的其它相,Ag-,Au-或Al-富集相对碳化硅的体积比大于4,至少60%的金刚石表面被硅-碳化合物所覆盖。优选的制造工艺包括大气压和压力帮助的渗透技术。该部件特别适合作为半导体元件的受热器。
Description
技术领域
本发明涉及作为受热器的部件,该部件由金刚石含量为40~90体积%并且金刚石颗粒平均粒度为5~300μm的复合材料制成,还涉及制造该受热器部件的方法。
背景技术
受热器(Wrmesenke)广泛用于电子元件的生产中。除了受热器外,半导体元件和机械稳定的包封是电子组合件的必要组成。基材、散热器或支承板等项也常用于受热器。半导体元件包含,例如,单晶硅或砷化镓。它通常用焊接方法作为结合技术与受热器连接。受热器具有将半导体元件在工作时产生的热传导出去的功能。产生特别大量热的半导体元件有,例如,横向扩散的金属氧化物半导体(LDMOS)、激光二极管、中央处理单元(CPU)、微处理器单元(MPU)或高频放大装置(HFAD)。
受热器的几何结构根据应用而定,并且可有很大的变化。简单的形式是平板。但是,也使用具有凹穴和阶梯的复杂构造。受热器本身然后与机械稳定的包装或封装连接。
和其它材料相比,所使用的半导体材料的热膨胀系数是低的,根据文献的报道,硅的热膨胀系数为2.1×10-6K-1~4.1×10-6K-1,砷化镓为5.6×10-6K-1~5.8×10-6K-1。在工业上没有得到广泛应用的其它半导体材料如Ge,In,Ga,As,P或碳化硅,也具有类似低的膨胀系数。陶瓷材料复合物材料或塑料通常用作封装。陶瓷材料的例子有膨胀系数为6.5×10-6K-1的Al2O3或膨胀系数为4.5×10-6K-1的氮化铝。
如果参与元件的膨胀特性不同,则在组合物体中就会产生应力,这会导致变形,导致材料的解体或导致元件的断裂。应力可在封装(包装)物制造的过程中产生,也可在从焊接温度冷却到室温的阶段中产生。但是,温度波动也会在包装的工作期间产生,波动的范围可例如为-50℃~200℃,这会导致包装中的热机械应力。这些因素决定了对用于受热器的材料的要求。首先,它应该具有极高的导热性,以便保持半导体元件在工作时的升温尽可能地低。其次,其热膨胀系数必须尽可能地与半导体元件和封装的热膨胀系数匹配。单相金属材料不能充分符合所要求的性能,因为具有高导热性的材料也具有高热膨胀系数。
因此,为了符合所需的性能,使用复合材料或材料复合体来制造基材。
例如,在欧洲专利0100232、美国专利4950554和美国专利5493153中所叙述的常规的钨-铜和钼-铜复合材料或材料复合物在室温的导热性为170~250W/(m.K),其热膨胀系数为6.5×10-6K-1~9.0×10-6K-1,这对于许多应用来说是不充分的。
随着日益增加的对受热器导热性的要求,金刚石的和含金刚石的复合材料进入人们的视线。因此,金刚石的导热性是1000~2000W/(m.K),在晶格点中氮和硼原子的含量对于决定其品质具有特别重要的意义。
欧洲专利0521405叙述了一种受热器,它在面对半导体芯片的一侧有多晶形的金刚石层。该金刚石层缺少塑性可变形性,即使在从涂覆温度冷却的过程也可导致金刚石层的碎裂。
美国专利5273790叙述了导热性为>1700W/(m.K)的金刚石复合材料,在这种情况下用来成形的松散的金刚石颗粒通过气相金刚石沉积被转变成稳定的成形体。这样产生的金刚石复合材料用于大批生产的部件从商业角度看是太贵了。
WO 99/12866叙述了生产金刚石-碳化硅复合材料的方法。它通过用硅或硅合金渗入金刚石骨架来制造。由于硅的高熔点和由此而来的高渗透温度,金刚石被部分转化为碳,或者随即被转化为碳化硅。由于高脆裂性,该材料的机械成形是大成问题的并且是昂贵的,因此这种复合材料迄今没有用在受热器中。
美国专利4902652叙述了制造烧结的金刚石材料的方法。在该方法中,用物理涂覆方法将元素周期表4a,5a和6a族的过渡金属元素、硼和硅沉积在金刚石粉末上。所涂覆的金刚石颗粒随即通过固态烧结方法彼此结合。该方法的缺点在于,所形成的产品具有高的孔隙度,而且对于许多应用来说其热膨胀系数太低。
美国专利5045972叙述了一种复合材料,其中金刚石颗粒的粒度为1~50μm,还具有包含铝、镁、铜、银或它们的合金的金属基质。其缺点是,这种金属基质与金刚石颗粒的连接是不能令人满意的,因此,结果是,其导热性和机械整体性不够充分。
在美国专利5008737中叙述了使用更细的金刚石粉末,例如粒度<3μm的金刚石粉末,也不能改善金刚石/金属的粘合。
美国专利5783316叙述了一个方法,其中金刚石颗粒用W,Zr,Re,Cr或钛涂覆,所涂覆的颗粒随后被压实,产生的多孔体用例如Cu,Ag或Cu-Ag熔体渗透。用这种方法制造的复合材料的使用由于其高涂覆成本而受到限制。
欧洲专利0859408叙述了一种用于受热器的材料,它的基质是用金刚石颗粒和金属碳化物制造的,基质的间隙用金属填满。作为金属碳化物,可提及周期表4a-6a族的金属的碳化物。在欧洲专利0859408中特别强调了TiC,ZrC和HfC。据说Ag,Cu,Au和Al是特别好的填充剂金属。其缺点是,金属碳化物的导热性低,在TiC,ZrC,HfC,VC,NbC和 TaC的情况下,其范围在10~65W/(m.K)。还有的缺点是,周期表4a-6a族的金属在填充剂金属(例如银)中有一定的溶解性,结果,金属相的导热性大为降低。
欧洲专利0893310叙述了一种受热器,其包含金刚石颗粒和具有高导热性的金属或金属合金(金属为Cu,Ag,Au,Al,Mg,An)以及周期表4a,5a族的金属和Cr的金属碳化物,该金属碳化物覆盖至少25%的金刚石颗粒的表面。同样,周期表4a,5a族和Cr的碳化物的导热性差,以及这些元素在Cu,Ag,Au,Al,Mg,Zn中的高溶解性,和与此有关的导热性降低都是缺点。
近年来,半导体元件的加工速度和集成化程度都有很大提高,这也导致包装中热释放的增加。因此,最佳的热控制是一个更加重要的判断标准。上述材料的导热性对于许多应用不再是充分的,或者它们的生产对于广泛的使用来说太昂贵。对于进一步优化半导体元件,改进的、便宜的受热器的获得是一个前提条件。
发明内容
因此,本发明的目的是为了提供可用作受热器元件的复合材料,该材料具有高导热性、低膨胀系数,并结合能够廉价制造的加工性能。该目的通过权利要求1所主张的元件而达到。
本发明的元件在金刚石颗粒和银-(Ag-),金-(Au-),或铝-(Al-)富集相之间表现优良的粘合,这是由于在它们之间形成的硅-碳化合物的缘故。为了达到这样的结合,该硅-碳化合物的厚度在纳米范围,或覆盖度>60%已经足够。为了本发明的目的,覆盖度是被硅-碳化合物覆盖的金刚石颗粒的表面的比例。在这样的前提下,这相应于硅-碳化合物的体积含量>0.005%。
与金属碳化物相比,碳化硅具有约250W/(m.K)的极高的导热性。因为在室温下,硅(Si)在Ag,Au和Al中的溶解性极低,这些金属在纯态下的极高导热性只有轻微的降低。Ag,Au或Al与铜(Cu)或镍(Ni)的合金同样具有足够高的导热性,不会被少量溶解的Si降低到不可接受的高程度。
而且,由于极具延性的Ag,Au或Al微结构组分,可以确保充分程度的机械可成形性。廉价制造的另一个优点是,高导热性的Ag-,Au-,或Al-富集微结构组分可以减少金刚石含量。金刚石、碳化硅和金属相含量的变化有可能通过调节导热性和热膨胀,制造出符合各种要求的受热器。
而且,微结构组分只要含量不超过5体积%,就不会使性能降低到不可接受的程度。可以提及的这种类型的组分是游离硅或游离碳。虽然这些微结构组分轻微地提高了导热性,但它们通过降低热膨胀系数而对于后者具有有利的作用。此外,就生产过程而言,有时要完全避免它们却会产生相当的困难。
碳化硅和Ag-,Au-或Al-富集相的特别有利的含量分别是0.1~7体积%和7~30体积%。实验表明,金刚石粉可在很广的粒度谱(spectrum)内加工。除天然金刚石外,也可以加工更廉价的合成金刚石。使用常规涂覆的金刚石类型,已经达到优良的加工结果。这样,在各种情况下都可使用最便宜的类型。在对导热性要求极高而费用不是关的应用情况下,最好使用平均粒度范围在50~150μm的金刚石碎屑。而且,通过使用含量在20~30体积%的Ag可以达到最高的导热性值。
对用于电子元件的作为受热器的部件的使用,它们最好用Ni,Cu,Au或Ag或者这些金属的合金涂覆,随后用陶瓷构架焊接,例如Al2O3或AlN。
为了制造复合材料,可以使用多种方法。因此,可以用Ag,Au或Al在高温和压力下使SiC-涂覆的金刚石粉末密集化。这在,例如,热压机或热均衡压机中是有效的。已经发现渗透是特别有利的。在此,可制造出除金刚石粉末以外还含有黏合剂的前体或中间体。在热的作用下大部分热裂解的黏合剂是特别优选的。优选的黏合剂含量为1~20重量%。金刚石粉末和黏合剂在常规的混合器或研磨机中混合。然后使混合物成形,这可通过在压力的帮助下注入模型,例如推压或金属粉末注射成型。随后加热中间体到高温,此时黏合剂已部分热裂解。然而,黏合剂的热裂解也可在渗透过程的加热中发生。渗透过程可在大气压或压力的帮助下进行。后者通常称为挤压铸造。作为渗透材料,优选使用Si含量<50重量%的Ag-Si,Au-Si或Al-Si合金的膜。在选择组成时,要确保各个合金的液相线温度不超过1200℃,优选不超过1000℃,否则分解的金刚石的比例太高。具有低共熔组成的膜是特别适合于渗透的。除了特别优选用于在半导体元件中将热传导出去的元件的用途外,本发明的复合材料也可用作其它应用的受热器,例如在航天领域或发动机制造领域。
具体实施方式
本发明通过以下的制造实施例加以说明:
实施例1
平均粒度为40~80μm的IIA级天然金刚石粉末(Micron+SND从Element Six GmbH)与7体积%的环氧树脂基的黏合剂混合。如此制备的前体或中间体用模压在200MPa的压力压成尺寸为35mm×35mm×5mm的板。板的孔隙度约为15体积%。
该板随后用由Si含量为11原子%的易熔Ag-Si合金构成的膜覆盖,以便进行渗透,然后在炉子中在减压下加热到860℃的温度,保温时间为15分钟。在冷却到室温(期间在400℃停留约10分钟)后,用定量金相学方法测定所存在的各相的体积含量。
碳化硅的值约为2体积%,大部分碳化硅均匀包封金刚石颗粒。由于该碳化硅壳的厚度低,碳化硅相的修正或变型不能测定。除了金刚石和碳化硅以外,微结构包含包埋了Si沉淀物的Ag-富集相,这是由共晶反应形成的。Ag-富集相的体积比例约为12%,Si的体积比例约为1%。在Ag-富集相用EDX没有检测到除了Ag以外的构成物,因此在可实行的检测极限的基础上可以假定,Ag的比例大于99原子%。
为了测定导热性和热膨胀系数,用激光和侵蚀的手段来加工该板。测得在室温的导热性平均值为450W/(m.K)。测得热膨胀系数的平均值为8.5×10-6K-1。
实施例2
在进一步的实验中,加工平均粒度为40~80μm的Micron+MDA级合成金刚石粉末(从Element Six GmbH)。按照实施例1所述的方法进行加工。如此产生的复合材料的平均导热性为410W/(m.K),平均热膨胀系数为9.0×10-6K-1。
实施例3
在进一步的实验中,加工平均粒度为40~80μm的Micron+MDA级合成金刚石粉末(从Element Six GmbH)。按照实施例1所述的方法制造前体。压制的前体用易熔的Ag-Si熔体渗透是在约40MPa的气体压力在常规的挤压铸造装置中进行的,该装置的热成形钢模已经预热到150℃。Ag-Si熔体的温度约为880℃。接着进行缓慢冷却到室温,期间在400℃停留约15分钟。如此产生的复合材料的平均导热性为480W/(m.K),平均热膨胀系数为8.5×10-6K-1。
实施例4
平均粒度为40~80μm的Micron+MDA级合成金刚石粉末(从Element Six GmbH)按照实施例3所述的方法进行加工,但从渗透温度冷却到室温的过程中没有在约400℃相停留15分钟。如此产生的复合材料的平均导热性为440W/(m.K),平均热膨胀系数为8.5×10-6K-1。
Claims (17)
1.作为受热器的部件,由含40~90体积%的金刚石、金刚石颗粒的平均粒度为5~300μm的复合材料制成,其特征在于,所述的复合材料包含0.005~12体积%的硅-碳化合物,7~49体积%的Ag-,Au-或Al-富集相和低于5体积%的其它相,Ag-,Au-或Al-富集相对硅-碳化合物的体积比大于4,至少60%的金刚石颗粒表面被硅-碳化合物覆盖。
2.如权利要求1所述的部件,其特征在于,所述的硅-碳化合物是SiC。
3.如权利要求1或2所述的部件,其特征在于,所述的Ag-,Au-或Al-富集相包含至少95原子%的所述各元素。
4.如权利要求1至3任一项所述的部件,其特征在于,所述的Ag-,Au-或Al-富集相还包含Cu和/或Ni。
5.如权利要求4所述的部件,其特征在于,所述的含Cu和/或Ni的Ag-,Au-或Al-富集相还包含Si。
6.如权利要求1至5任一项所述的部件,其特征在于,所述的复合材料含有0.1~4.5体积%的游离硅。
7.如权利要求1至5任一项所述的部件,其特征在于,所述的复合材料含有0.1~4.5体积%的游离碳。
8.如权利要求1至7任一项所述的部件,其特征在于,所述的硅-碳化合物主要或完全由硅与金刚石的碳的反应形成。
9.如权利要求1至8任一项所述的部件,其特征在于,金刚石粒度为50~150μm。
10.如权利要求1至9任一项所述的部件,其特征在于,所述的复合材料包含0.01~12体积%的碳化硅和7~49体积%的Ag-,Au-或Al-富集相。
11.如权利要求1至10任一项所述的部件,其特征在于,所述的复合材料包含0.01~7体积%的碳化硅和7~49体积%的Ag。
12.如权利要求1至11任一项所述的部件,其特征在于,其上涂覆了包含Ni,Cu,Au,Ag或这些金属的合金的金属涂料的涂层。
13.如权利要求1至12任一项所述的部件,其特征在于,在它的上面焊接了陶瓷框架。
14.制造如权利要求1至13任一项所述的部件的方法,其特征在于,该方法至少包含如下工艺步骤:
a)制造一个中间体,其包含粒度为5~300μm的金刚石颗粒和基于聚合物或蜡的黏合剂,黏合剂的比例为1~20重量%,
b)将所述中间体放入模型中在大气压下或在压力的帮助下使该中间体成形,
c)通过在保护性气氛下加热所述的中间体到300~1200℃,至少部分热裂解所述的黏合剂,制造多孔金刚石体,使这个步骤能够被整合到渗透工艺中,
d)多孔金刚石体的渗透,其方法是将它和含硅的Ag,Au或Al合金,其中,其硅含量为<40重量%,一起加热到各个含硅的Ag,Au或Al合金的液相线温度以上的温度,优选在减压下加热,使至少一部分硅与热裂解的黏合剂的碳以及与金刚石反应,形成碳化硅。
15.制造如权利要求1至13任一项所述的部件的方法,其特征在于,该方法至少包含如下工艺步骤:
a)制造一个中间体,其包含粒度为5~300μm的金刚石颗粒和基于聚合物或蜡的黏合剂,黏合剂的比例为1~20重量%;
b)将所述中间体放入模型中在大气压下或在压力的帮助下使该中间体成形;
c)通过在保护性气氛下加热所述的中间体到300~1200℃,至少部分热裂解所述的黏合剂,制造多孔金刚石体,使这个步骤能够被整合到加压渗透工艺中;
d)将含硅的Ag,Au或Al合金,其中,其硅含量为<40重量%,加热到各个含硅的Ag,Au或Al合金的液相线温度以上的温度,并加压渗入所述的多孔金刚石体。
16.如权利要求14或15所述的方法,其特征在于,将低共熔Ag-Si合金用于所述渗透步骤。
17.如权利要求1至13任一项所述的部件作为半导体元件的受热器的用途。
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EP (2) | EP1601631A1 (zh) |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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US8575625B2 (en) | 2010-02-08 | 2013-11-05 | A.L.M.T. Corp. | Semiconductor element mounting member, method of producing the same, and semiconductor device |
CN112195384A (zh) * | 2020-10-26 | 2021-01-08 | 河南飞孟金刚石工业有限公司 | 一种低成本金刚石高导热材料及其制备方法 |
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JP4880447B2 (ja) | 2012-02-22 |
WO2004080913A1 (de) | 2004-09-23 |
EP1601630A1 (de) | 2005-12-07 |
JP2006519928A (ja) | 2006-08-31 |
US20060157884A1 (en) | 2006-07-20 |
JP4995565B2 (ja) | 2012-08-08 |
JP2006524173A (ja) | 2006-10-26 |
AT7382U1 (de) | 2005-02-25 |
US8575051B2 (en) | 2013-11-05 |
US20060130998A1 (en) | 2006-06-22 |
EP1601631A1 (de) | 2005-12-07 |
WO2004080914A1 (de) | 2004-09-23 |
EP1601630B1 (de) | 2017-12-27 |
CN100400467C (zh) | 2008-07-09 |
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