- 专利标题: Method of predicting thermal donor formation behavior in silicon wafer, method of evaluating silicon wafer, and method of producing silicon wafer
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申请号: US16621219申请日: 2018-06-12
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公开(公告)号: US11121003B2公开(公告)日: 2021-09-14
- 发明人: Kazuhisa Torigoe , Shigeru Umeno , Toshiaki Ono
- 申请人: SUMCO Corporation
- 申请人地址: JP Tokyo
- 专利权人: SUMCO Corporation
- 当前专利权人: SUMCO Corporation
- 当前专利权人地址: JP Tokyo
- 代理机构: Christensen O'Connor Johnson Kindness
- 优先权: JPJP2017-123626 20170623
- 国际申请: PCT/JP2018/022454 WO 20180612
- 国际公布: WO2018/235678 WO 20181227
- 主分类号: C30B33/02
- IPC分类号: C30B33/02 ; H01L21/322 ; C30B29/06
摘要:
Provided is a method of accurately predicting the thermal donor formation behavior in a silicon wafer, a method of evaluating a silicon wafer using the prediction method, and a method of producing a silicon wafer using the evaluation method. The method of predicting the formation behavior of thermal donors, includes: a first step of setting an initial oxygen concentration condition before performing heat treatment on the silicon wafer for reaction rate equations based on both a bond-dissociation model of oxygen clusters associated with the diffusion of interstitial oxygen and a bonding model of oxygen clusters associated with the diffusion of oxygen dimers; a second step of calculating the formation rate of oxygen clusters formed through the heat treatment using the reaction rate equations; and a third step of calculating the formation rate of thermal donors formed through the heat treatment based on the formation rate of the oxygen clusters.
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