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    • 6. 发明专利
    • Heat treatment method for silicon wafer, and silicon wafer processed using the same
    • 用于硅砂的热处理方法和使用其的硅加工方法
    • JP2008135773A
    • 2008-06-12
    • JP2008005928
    • 2008-01-15
    • Siltronic Agジルトロニック アクチエンゲゼルシャフトSiltronic AG
    • HOELZL ROBERTSEURING CHRISTOPHWAHLICH REINHOLDVON AMMON WILFRIED
    • H01L21/322C30B33/00H01L21/26H01L21/324
    • C30B29/06C30B33/00H01L21/3225H01L21/324Y10T117/1088
    • PROBLEM TO BE SOLVED: To provide a heat treatment method for a silicon wafer which is carried out economically, in which the silicon wafer will not further contain COPs, only in a region near the surface, but will not contain COPs through the main portions of wafer thickness, and to provide the silicon wafer obtained by the method. SOLUTION: In this manufacturing method, the silicon wafer is at least temporarily exposed to an oxygen-containing atmosphere, during which the heat treatment is carried out, at a temperature which is selected so that the Inequality (1) is satisfied, where [Oi] is the concentration of oxygen in the silicon wafer, [Oi] eq (T) is the limit solubility of oxygen in silicon at a temperature T, σ SiO2 is the surface energy of silicon dioxide, Ω is the volume of precipitated oxygen atom, r is the mean COP radius and k is the Boltzmann's constant. The silicon wafer has a density of nucleation centers for the oxygen precipitation of at least 10 7 cm -3 in its bulk, and has a zone that does not contain nucleation centers, having a thickness of at least 1 μm on the wafer front surface, and COPs density that is smaller than 10,000 cm -3 , down to a depth corresponding to at least 50% of the wafer thickness. COPYRIGHT: (C)2008,JPO&INPIT
    • 要解决的问题:为了提供经济地进行的硅晶片的热处理方法,其中硅晶片不再进一步包含COP,仅在靠近表面的区域中,而不会含有COP 晶片厚度的主要部分,并提供通过该方法获得的硅晶片。 解决方案:在该制造方法中,硅晶片至少暂时暴露于在选择为满足不等式(1)的温度下进行热处理的含氧气氛中, 其中[Oi]是硅晶片中氧的浓度,其中,在温度T下,氧在硅中的极限溶解度,σ 是二氧化硅的表面能,Ω是沉淀氧原子的体积,r是平均COP半径,k是玻尔兹曼常数。 硅晶片的体积中的氧沉淀的成核中心的密度为至少10个/秒,具有不含成核中心的区域, 在晶片前表面上具有至少1μm的厚度,以及小于10,000cm -3 的COP密度,至少相当于晶片厚度的50%的深度。 版权所有(C)2008,JPO&INPIT
    • 7. 发明专利
    • Method for producing high quality silicon single crystal and silicon single crystal wafer made by using the same
    • 生产高品质硅单晶和硅单晶水晶的方法
    • JP2007182373A
    • 2007-07-19
    • JP2006346581
    • 2006-12-22
    • Siltron Incシルトロン インク
    • CHO HYON-JONG
    • C30B29/06C30B15/20
    • C30B29/06C30B15/14C30B15/203Y10T117/1068Y10T117/1072Y10T117/1088
    • PROBLEM TO BE SOLVED: To provide a method for producing a high quality silicon single crystal which can be suitably used for producing a non-defect and high quality single crystal ingot by a high growth rate, and to provide a silicon single crystal wafer produced using the same. SOLUTION: In the method for producing a high quality single crystal by a Czochralski method, a lower portion of a solid-liquid interface of single crystal growth is divided into a central part and a circumferential part, and the temperature gradient of the central part and the temperature gradient of the circumferential part are separately controlled. Thereby, when the silicon melt located at a lower portion of the solid-liquid interface is divided into a central part and a circumferential part, the temperature gradient of the central part is directly controlled by controlling the temperature distribution of the melt and the temperature gradient of the circumferential part is indirectly controlled by controlling the temperature gradient of the single crystal, and thereby the temperature distribution of the melt can be effectively controlled. COPYRIGHT: (C)2007,JPO&INPIT
    • 待解决的问题:提供一种高品质硅单晶的制造方法,其可以适用于以高生长速度生产非缺陷和高质量的单晶锭,并提供硅单晶 使用其制造的晶片。 解决方案:在通过切克劳斯基法生产高质量单晶的方法中,单晶生长的固液界面的下部被分成中心部分和周边部分,并且温度梯度 中心部分和周向部分的温度梯度被单独控制。 因此,当位于固液界面下部的硅熔体被分成中心部分和周边部分时,通过控制熔体的温度分布和温度梯度来直接控制中心部分的温度梯度 通过控制单晶的温度梯度间接地控制圆周部分,从而可以有效地控制熔体的温度分布。 版权所有(C)2007,JPO&INPIT
    • 8. 发明专利
    • Apparatus for growing high quality silicon single crystal ingot and growing method using the apparatus
    • 用于生产高质量硅单晶的装置和使用装置的生长方法
    • JP2007084417A
    • 2007-04-05
    • JP2006025025
    • 2006-02-01
    • Siltron Incシルトロン インク
    • CHO HYON-JONG
    • C30B29/06C30B15/14
    • C30B29/06C30B15/14C30B35/00Y10S117/917Y10T117/1068Y10T117/1072Y10T117/1076Y10T117/1088
    • PROBLEM TO BE SOLVED: To provide an apparatus for growing a high quality silicon single crystal ingot where the high quality silicon single crystal ingot in which growing defects are extremely controlled to such a degree that defects are not caused in actual device manufacturing can be manufactured with high productivity while so controlling as for ingot to have various oxygen concentrations, to provide a growing method using the apparatus and to provide a silicon single crystal ingot and a wafer produced by the method. SOLUTION: A silicon single crystal is grown by a Czochralski method using an apparatus for growing the silicon single crystal, which comprises a chamber, a crucible provided in the chamber to receive a silicon molten liquid, a heater being provided beside the crucible for heating the silicon molten liquid and having a maximum exothermic section existing at a specified position in the crucible and a pulling mechanism to pull the growing silicon single crystal from the silicon molten liquid. COPYRIGHT: (C)2007,JPO&INPIT
    • 要解决的问题:为了提供一种用于生长高品质硅单晶锭的装置,其中生长缺陷被极度地控制到在实际器件制造中不引起缺陷的程度的高质量硅单晶锭 以高生产率制造,同时控制锭具有各种氧浓度,以提供使用该装置的生长方法,并提供通过该方法制造的硅单晶锭和晶片。 解决方案:使用用于生长硅单晶的装置,通过切克劳斯基法(Czochralski method)生长硅单晶,其包括室,设置在室中的坩埚以接收硅熔融液体,在坩埚旁边设置加热器 用于加热硅熔融液体并且具有存在于坩埚中的特定位置处的最大放热部分以及从硅熔融液体拉出生长的硅单晶的拉动机构。 版权所有(C)2007,JPO&INPIT