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    • 96. 发明专利
    • Heat treatment method for silicon wafer, and silicon wafer treated with the method
    • 用于硅砂的热处理方法和用该方法处理的硅波
    • JP2003297840A
    • 2003-10-17
    • JP2003029617
    • 2003-02-06
    • Wacker Siltronic Agワッカー ジルトロニック アクチエンゲゼルシャフト
    • HOELZL ROBERTSEURING CHRISTOPHWAHLICH REINHOLDVON AMMON WILFRIED
    • C30B33/00H01L21/322H01L21/324
    • C30B29/06C30B33/00H01L21/3225H01L21/324Y10T117/1088
    • PROBLEM TO BE SOLVED: To provide a heat treatment method for a silicon wafer which does not have defects of a prior art, is performed economically, and further not only does not contain COPs only in an area close to its surface, but also does not contain COPs over the main portion of the thickness of the wafer, and further provides a silicon wafer obtained by the method. SOLUTION: The manufacturing method is performed such that a silicon wafer is exposed to an oxygen-containing atmosphere at least temporarily, and thereupon, heat treatment is performed at a temperature selected to satisfy an inequality expression (1) claimed in the claim 1. The silicon wafer has the density of the center of nucleus formation for separating oxygen of at least 10 7 cm -3 inside a bulk, and a zone which does not include the center of nucleus formation having at least 1 μm on a wafer surface side, and further COPs density of lower than 10,000 cm -3 down to a depth equivalent to at least 50% of the thickness of the wafer. COPYRIGHT: (C)2004,JPO
    • 要解决的问题:为了提供不具有现有技术缺陷的硅晶片的热处理方法,经济地进行,并且进一步不仅仅在靠近其表面的区域中仅含有COP,而且 也不包含在晶片厚度的主要部分上的COP,并且还提供通过该方法获得的硅晶片。 解决方案:进行制造方法,使得硅晶片至少暂时暴露于含氧气氛,然后在选择为满足权利要求书中要求保护的不等式(1)的温度下进行热处理, 硅晶片具有用于在体内分离至少10 7 cm -3 的氧核形成中心的密度,并且不包括 在晶片表面侧具有至少1μm的核形成中心,以及低于10,000cm -3 的至少相当于晶片厚度的50%的深度的COP密度 。 版权所有(C)2004,JPO
    • 100. 发明专利
    • Production device for gaas single crystal
    • GAAS单晶生产设备
    • JPS5939797A
    • 1984-03-05
    • JP14974782
    • 1982-08-27
    • Semiconductor Res Found
    • NISHIZAWA JIYUNICHI
    • C25D11/04C30B13/00C30B13/08C30B13/20C30B29/42H01L21/18
    • C30B13/20C30B13/00C30B13/08C30B29/42Y10T117/1008Y10T117/1088
    • PURPOSE:To provide a production device for a single crystal by a floating zone melting method which can form a GaAs single crystal of a large diameter having high purity, by providing an As-containing vessel controlled to a specific temp. in a vessel contg. a polycrystal of GaAs and a single crystal. CONSTITUTION:The GaAs polycrystal 6 in a quartz cylinder 1 is subjected to high-frequency induction heating to about 1,240 deg.C with a soaking coil 20 to make a melt part 5, and a seed crystal 3 is seeded therein. After necking, rotary support bars 10, 8 are moved downward to grow a single crystal 4. Then the temp. of the As 13 in an As-containing vessel 11 connected with a fine quartz tube 12 to the cylinder 1 in the above-mentioned method is controlled to the temp. at which the optimum pressure of arsenic satisfying the stoichiometric compsn. of the crystal is obtd. The above-mentioned temp. TA of the arsenic is determined as the value satisfying the equation [GGaAs is the temp. of the melt part 5; PGaAs is the vapor pressure of As in the melt part 5; PAs is the vapor pressure of As in the vessel 11 (determined clearly from the value of TAs)].
    • 目的:通过提供一种可以形成具有高纯度的大直径的GaAs单晶的浮区熔化方法,通过提供控制到特定温度的含As容器来提供单晶的生产装置。 在船只 GaAs和单晶的多晶体。 构成:将石英筒1中的GaAs多晶体6用浸渍线圈20进行约1240℃的高频感应加热,制成熔融部5,将晶种3接种于其中。 收缩后,旋转支撑杆10,8向下移动以生长单晶4.然后, 在与上述方法中的气缸1的细石英管12连接的含有As的容器11中的As 13的温度被控制为温度。 其中砷的最佳压力满足理论配比。 的水晶是有限的。 上述温度 砷的TA被确定为满足等式[GGaAs是温度]的值。 的熔体部分5; PGaAs是熔体5中的As的蒸气压; PA是容器11中As的蒸汽压(从TAs的值确定)]。