Invention Grant
US08173449B2 Method for making COP evaluation on single-crystal silicon wafer 有权
在单晶硅晶片上进行COP评估的方法

  • Patent Title: Method for making COP evaluation on single-crystal silicon wafer
  • Patent Title (中): 在单晶硅晶片上进行COP评估的方法
  • Application No.: US12308060
    Application Date: 2007-05-22
  • Publication No.: US08173449B2
    Publication Date: 2012-05-08
  • Inventor: Shuichi Inami
  • Applicant: Shuichi Inami
  • Applicant Address: JP Tokyo
  • Assignee: Sumco Corporation
  • Current Assignee: Sumco Corporation
  • Current Assignee Address: JP Tokyo
  • Agency: Clark & Brody
  • Priority: JP2006-161094 20060609
  • International Application: PCT/JP2007/060425 WO 20070522
  • International Announcement: WO2007/142024 WO 20071213
  • Main IPC: G01R31/26
  • IPC: G01R31/26 H01L21/66
Method for making COP evaluation on single-crystal silicon wafer
Abstract:
An evaluation area of an evaluation object wafer is concentrically divided in a radial direction, an upper limit value to the number of COPs is set in each divided evaluation segment, and an acceptance determination of the single-crystal silicon wafer is made using the upper limit value as a criterion. Thereby, a quantitative and objective COP evaluation can be made, and a proper determination is made based on a clear criterion. The evaluation method of the present invention can sufficiently deal with automation of the COP evaluation (inspection) and the higher-quality wafer in the near future, and the evaluation method can be widely applied to production of the single-crystal silicon wafer and production of a semiconductor device.
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