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    • 91. 发明专利
    • Apparatus and method for producing silicon carbide single crystal
    • 用于生产碳化硅单晶的装置和方法
    • JP2009051701A
    • 2009-03-12
    • JP2007221128
    • 2007-08-28
    • Denso Corp株式会社デンソー
    • KONDO HIROYUKIONDA SHOICHIMATSUI MASAKI
    • C30B29/36C30B23/06
    • PROBLEM TO BE SOLVED: To obtain a long high-quality SiC single crystal.
      SOLUTION: A graphite crucible 1 is arranged such that a central axis R2 of the graphite crucible 1 is shifted by a certain distance L relative to a central axis R1 of a rotating device 5 or a heating device 6, and a region 4b in which screw dislocation can occur in a SiC single crystal substrate 3 is in agreement with the central axis R1 of the rotating device 5 and the heating device 6. Thereby, when growing up a SiC single crystal 4 on the SiC single crystal substrate 3, it is possible to prevent that the region 4b in which screw dislocation can occur in the SiC single crystal 4 have a higher temperature than the region surrounding the above region. Thus, the growth of a long SiC single crystal 4 becomes possible, and it also becomes possible to obtain many high-quality crystals having a large diameter.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:获得长质量的SiC单晶。 解决方案:石墨坩埚1被布置成使得石墨坩埚1的中心轴线R2相对于旋转装置5或加热装置6的中心轴线R1偏移一定距离L,并且区域4b 其中在SiC单晶衬底3中发生螺旋位错与旋转装置5和加热装置6的中心轴R1一致。因此,当在SiC单晶衬底3上生长SiC单晶4时, 可以防止在SiC单晶4中发生螺旋位错的区域4b的温度比围绕上述区域的区域高。 因此,长的SiC单晶4的生长成为可能,并且也可以获得许多具有大直径的高品质晶体。 版权所有(C)2009,JPO&INPIT
    • 92. 发明专利
    • Method and apparatus for producing silicon carbide monocrystal
    • 用于生产碳化硅单晶的方法和装置
    • JP2009018957A
    • 2009-01-29
    • JP2007181964
    • 2007-07-11
    • Denso Corp株式会社デンソー
    • YAMADA MASANORIURAGAMI YASUSHI
    • C30B29/36C30B23/06
    • PROBLEM TO BE SOLVED: To provide an apparatus and a method, in an embedded growth process, capable of preventing the loss of the uniformity of the temperature in the growth space region by thermal radiation, to thereby prevent a crack of silicon carbide monocrystal.
      SOLUTION: In a cylinder covering member 23c arranged in the hollow section of a cylinder 23b, the shape of inner wall surfaces 23e vertical to the central axis of a crucible is polygonal. Thereby, the thermal energy emitted from the inner wall surfaces 23e of the cylinder covering member 23c in the diameter direction of the crucible is reflected at the angle of reflection according to the angle of incidence entering each side of the polygonal, respectively.
      COPYRIGHT: (C)2009,JPO&INPIT
    • 要解决的问题:提供一种在嵌入式生长工艺中能够通过热辐射防止生长空间区域中的温度均匀性丧失的装置和方法,从而防止碳化硅裂纹 单晶体。 解决方案:在布置在圆筒23b的中空部分中的圆筒覆盖部件23c中,与坩埚的中心轴垂直的内壁面23e的形状为多边形。 因此,从坩埚的直径方向的气缸盖部件23c的内壁面23e发射的热能分别根据入射到多边形的每一侧的入射角以反射角反射。 版权所有(C)2009,JPO&INPIT
    • 96. 发明专利
    • Method for producing silicon carbide single crystal
    • 生产碳化硅单晶的方法
    • JP2008169111A
    • 2008-07-24
    • JP2008015928
    • 2008-01-28
    • Showa Denko Kk昭和電工株式会社
    • YAMAMOTO ISAMUKOMAKI KUNIOYANO KOTAROKOYANAGI NAOKINISHINO SHIGEHIRO
    • C30B29/36C30B23/06
    • PROBLEM TO BE SOLVED: To provide a method for producing a silicon carbide single crystal which is reduced in the content of inclusions, impurity elements and crystal defects, by using a sublimation-recrystallization method of silicon carbide.
      SOLUTION: The method for producing the silicon carbide single crystal 5 on a silicon carbide substrate 2 uses a graphite crucible 1 having an inner surface covered with tantalum carbide as a crucible 1 for storing a raw material 3 for silicon carbide in order to eliminate the deviation and a variation factor of a sublimed composition of the raw material 3, and the influence on the single crystal 5 caused by the factors. On inner surface of the graphite crucible 1 having the inner surface covered with tantalum carbide, tantalum is deposited in layers utilizing an electron beam heating vapor depositing method, and then a carbide inner surface layer is formed by a carbonization method.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种通过使用碳化硅的升华 - 再结晶法来降低夹杂物含量,杂质元素和晶体缺陷的碳化硅单晶的制造方法。 解决方案:在碳化硅基板2上制造碳化硅单晶5的方法使用具有覆盖有碳化钽的内表面的石墨坩埚1作为用于储存碳化硅原料3的坩埚1,以便 消除原料3的升华组合物的偏差和变化因子,以及因素对单晶5的影响。 在内表面被碳化钽覆盖的石墨坩埚1的内表面上,利用电子束加热气相沉积法层叠钽,然后通过碳化法形成碳化物内表面层。 版权所有(C)2008,JPO&INPIT
    • 99. 发明专利
    • Method of fixing seed crystal and method of manufacturing single crystal using the same
    • 固定晶种的方法及使用其制造单晶的方法
    • JP2008019166A
    • 2008-01-31
    • JP2007215726
    • 2007-08-22
    • Matsushita Electric Ind Co Ltd松下電器産業株式会社
    • NORIKANE TETSUYAHOSHIKAWA KOSUKE
    • C30B29/36C30B23/06
    • PROBLEM TO BE SOLVED: To provide a method of fixing a seed crystal used for growing a silicon carbide single crystal in which development of microscopic defects extending in a grown single crystal are inhibited, and to provide a method of manufacturing the single crystal using the same.
      SOLUTION: The method of fixing the seed crystal used for growing the silicon carbide single crystal from the seed crystal 3 fixed to a graphite base 1 comprises: forming a laminated product 25 obtained by placing a metal material 2 composed of titanium on the graphite base 1, disposing the seed crystal 3 on the metal material 2, and further placing a pressing member 4 for imposing a load on the seed crystal 3 thereon; then heat-treating the layered product 25 within the temperature range of 1,700-2,000°C to fix the graphite base 1, the metal material 2, and the seed crystal 3 to each other to form one body; cooling the layered product 25; and removing the pressing member 4 from the layered product 25.
      COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:提供一种固定用于生长在生长的单晶中延伸的微观缺陷的显影的碳化硅单晶的晶种的方法,并且提供制造单晶的方法 使用相同 解决方案:将固定在石墨基体1上的晶种3固定用于生长碳化硅单晶的晶种的方法包括:将形成钛的金属材料2 石墨基底1,将晶种3设置在金属材料2上,并且在其上进一步放置用于施加负载的加压构件4; 然后在1700〜2000℃的温度范围内对层叠体25进行热处理,将石墨基体1,金属材料2和晶种3彼此固定,形成一体; 冷却层叠体25; 并从层叠体25中取出按压部件4.(C)2008,JPO&INPIT