发明名称 |
Silicon wafer, SOI substrate, method for growing silicon single crystal, method for manufacturing silicon wafer, and method for manufacturing SOI substrate |
摘要 |
When growing a silicon single crystal free of grown-in defects based on the CZ method, the crystal is pulled out at a critical pulling rate at which a ring-shaped OSF occurrence region vanishes in a center portion of the crystal by using a hot zone structure in which a temperature gradient Gc in a center portion of the crystal is equal to or greater than a temperature gradient Ge in a peripheral portion of the crystal, while supplying an inert gas including hydrogen to an interior of a pulling furnace. The critical pulling rate at which the ring-shaped OSF occurrence region vanishes in the center portion of the crystal is increased, and single crystals free of grown-in defects in which dislocation clusters and COPs can be grown by pulling at a pulling rate higher than that of the prior art.
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申请公布号 |
US7704318(B2) |
申请公布日期 |
2010.04.27 |
申请号 |
US20050546600 |
申请日期 |
2005.08.23 |
申请人 |
SUMCO CORPORATION |
发明人 |
HOURAI MASATAKA;SUGIMURA WATARU;ONO TOSHIAKI;TANAKA TADAMI |
分类号 |
C30B29/06;C30B15/00;C30B15/20 |
主分类号 |
C30B29/06 |
代理机构 |
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