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    • 2. 发明专利
    • Manufacturing method of silicon semiconductor wafer
    • 硅半导体波形的制造方法
    • JP2005033217A
    • 2005-02-03
    • JP2004237738
    • 2004-08-17
    • Siltronic Agジルトロニック アクチエンゲゼルシャフトSiltronic AG
    • GRAEF DIETERVON AMMON WILFRIEDWAHLICH REINHOLDKROTTENTHALER PETERLAMBERT ULRICH
    • C30B29/06C30B13/00C30B15/00C30B33/02H01L21/322H01L21/324
    • C30B15/00C30B13/00C30B29/06Y10S117/916
    • PROBLEM TO BE SOLVED: To provide an optimized manufacturing method of a silicon wafer which can obtain the silicon wafer in which oxygen doping concentration having low defect density is at least 4 × 10
      17 /cm
      3 in especially near front surface region.
      SOLUTION: In the manufacturing method, (a) a silicon single crystal is processed which has an oxygen doping concentration of at least 4 × 10
      17 /cm
      3 and a nitrogen doping concentration of at least 1 × 10
      14 /cm
      3 , (b) the silicon wafer is formed by processing the silicon single crystal obtained by (a), and (c) the silicon wafer obtained by (b) is annealed at least at the temperature of 1000°C and for at least 1 hour. The distribution of defect size is shifted toward that of much smaller one by the nitrogen doping. When the silicon single crystal is manufactured in such a way that it is pulled up by Czochralski method in (a), the silicon single crystal under raising is forcibly cooled in such a manner that it stays at 1100°C to 850°C for under 80 minutes.
      COPYRIGHT: (C)2005,JPO&NCIPI
    • 要解决的问题:为了提供可以获得其中具有低缺陷密度的氧掺杂浓度的硅晶片的硅晶片的优化制造方法为至少4×10 14 SP / SP> 3 特别在前表面区域附近。 < P>解决方案:在制造方法中,(a)处理具有至少4×10 17 / cm 3 / SP>的氧掺杂浓度的硅单晶, 至少1×10 14 N / SP 3 / cm 3 SP 3的氮掺杂浓度,(b)通过处理由(a)获得的硅单晶和 (c)通过(b)获得的硅晶片至少在1000℃的温度下进行至少1小时的退火。 通过氮掺杂,缺陷尺寸的分布向小得多的分布。 当以(a)中通过Czochralski法拉制硅单晶时,将提高的单晶硅强制冷却至1100℃至850℃以下, 80分钟 版权所有(C)2005,JPO&NCIPI