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    • 1. 发明专利
    • Manufacturing method of silicon carbide semiconductor element
    • 碳化硅半导体元件的制造方法
    • JP2007201343A
    • 2007-08-09
    • JP2006020605
    • 2006-01-30
    • Central Res Inst Of Electric Power Ind財団法人電力中央研究所
    • NAGANO MASAHIRONAKAMURA TOMONOBUTSUCHIDA SHUICHI
    • H01L21/316H01L21/336H01L29/12H01L29/78
    • PROBLEM TO BE SOLVED: To provide a manufacturing method of a silicon carbide semiconductor element capable of efficiently removing or inactivating a carbon cluster remaining on an SiO
      2 /SiC boundary even when forming an insulating film having a certain amount of thickness.
      SOLUTION: In the manufacturing method of the silicon carbide semiconductor element in the process of forming the insulating film; the thickness of a thermally oxidized film is increased on the surface of a substrate by thermally treating the substrate for which a silicon carbide epitaxial film is formed under the atmosphere of an oxidized gas containing O
      2 and/or H
      2 O, and then the process of removing the carbon cluster existing on the SiO
      2 /SiC boundary or the like by thermally treating the substrate under the atmosphere of a gas containing NO, N
      2 O or NO
      2 is repeated for two or more times.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:为了提供能够有效地除去或失活保留在SiO 2 SBB / SiC界面上的碳簇的碳化硅半导体元件的制造方法,即使在形成具有 一定的厚度。 解决方案:在形成绝缘膜的过程中的碳化硅半导体元件的制造方法中, 热氧化膜的厚度在基板的表面上通过热处理形成有碳化硅外延膜的基板在含有O 2 SBB的氧化气体和/或H 然后通过在含有NO的气体的气氛下热处理基板,除去存在于SiO 2 / SB / SiC界面等上的碳簇的工序 ,N 2 O或NO 2 重复两次或更多次。 版权所有(C)2007,JPO&INPIT
    • 5. 发明专利
    • Semiconductor device
    • 半导体器件
    • JP2011114252A
    • 2011-06-09
    • JP2009271114
    • 2009-11-30
    • Central Res Inst Of Electric Power IndToshiba Corp株式会社東芝財団法人電力中央研究所
    • HATAKEYAMA TETSUONAGANO MASAHIROSUZUKI TAKUMASHINOHE TAKASHITSUCHIDA SHUICHI
    • H01L29/78H01L21/336H01L29/12H01L29/47H01L29/872
    • PROBLEM TO BE SOLVED: To provide a semiconductor device that is prevented from being deteriorated in performance and reliability due to BPD. SOLUTION: The semiconductor device includes a silicon carbide semiconductor substrate of a first conductivity type, a first silicon carbide semiconductor layer of the first conductivity type formed on the substrate and having a lower impurity concentration than the substrate, a second silicon carbide semiconductor layer of the first conductivity type formed on the first silicon carbide semiconductor layer and having a higher impurity concentration than the first silicon carbide semiconductor layer, and a third silicon carbide semiconductor layer formed on the second silicon carbide semiconductor layer and having a lower impurity concentration than the second silicon carbide semiconductor layer. COPYRIGHT: (C)2011,JPO&INPIT
    • 要解决的问题:提供防止由于BPD而导致的性能和可靠性劣化的半导体器件。 解决方案:半导体器件包括第一导电类型的碳化硅半导体衬底,第一导电类型的第一碳化硅半导体层,其形成在衬底上并且具有比衬底更低的杂质浓度;第二碳化硅半导体 形成在第一碳化硅半导体层上并且具有比第一碳化硅半导体层更高的杂质浓度的第一导电类型的层和形成在第二碳化硅半导体层上并且具有比第一碳化硅半导体层低的杂质浓度的第三碳化硅半导体层 第二碳化硅半导体层。 版权所有(C)2011,JPO&INPIT
    • 6. 发明专利
    • Method of detecting defects of silicon carbide single crystal wafer and method of manufacturing silicon carbide semiconductor device
    • 检测碳化硅单晶的缺陷的方法及制造硅碳化硅半导体器件的方法
    • JP2009044083A
    • 2009-02-26
    • JP2007210008
    • 2007-08-10
    • Central Res Inst Of Electric Power Ind財団法人電力中央研究所
    • TSUCHIDA SHUICHIKAMATA ISAONAGANO MASAHIRO
    • H01L21/66G01N23/207
    • PROBLEM TO BE SOLVED: To specify a position and type of a specific basal-plane defect in a wafer surface nondestructively by discriminating the basal-plane defect from other dislocations and stacking faults when it is intended to manufacture a silicon carbide semiconductor device from a silicon carbide single crystal wafer, and what is more, to manufacture, based on the specified result, a silicon carbide semiconductor device having device characteristics which are free of any influence coming from the crystal defects.
      SOLUTION: The method of detecting defects of silicon carbide single crystal wafer is characterized by: making a reflection X-ray topographic measurement in a wafer surface of a silicon carbide single crystal wafer; detecting a specific basal-plane defect nondestructively by identifying a specific diffraction pattern on the basis of the X-ray diffraction data in the wafer surface obtained by the reflection X-ray topographic measurement; and acquiring positional information of the detected basal-plane defect in the wafer surface. In addition, the method of manufacturing silicon carbide semiconductor device is set up using the method of detecting defects.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:通过在制造碳化硅半导体器件时识别基底缺陷与其他位错和堆垛层错来指定晶片表面中特定基面缺陷的位置和类型 从碳化硅单晶晶片,并且更具体地,基于指定的结果制造具有不受来自晶体缺陷的任何影响的器件特性的碳化硅半导体器件。 检测碳化硅单晶晶片的缺陷的方法的特征在于:在碳化硅单晶晶片的晶片表面进行反射X射线形貌测量; 通过基于通过反射X射线形貌测量获得的晶片表面中的X射线衍射数据识别特定的衍射图案,非破坏性地检测特定的基底面缺陷; 并且获取晶片表面中检测到的基底缺陷的位置信息。 此外,使用检测缺陷的方法来建立制造碳化硅半导体器件的方法。 版权所有(C)2009,JPO&INPIT