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人工晶体学报 ›› 2025, Vol. 54 ›› Issue (12): 2101-2111.DOI: 10.16553/j.cnki.issn1000-985x.2025.0130

• 研究论文 • 上一篇    下一篇

磁场强度对12英寸Cz单晶硅COP缺陷均匀性的影响

王忠保1(), 张友海1, 刘天培2, 倪浩然1, 芮阳1, 马成1, 王黎光1, 曹启刚1, 杨少林2,3()   

  1. 1.宁夏中欣晶圆半导体科技有限公司,宁夏半导体级硅晶圆材料工程技术研究中心,银川 750021
    2.北方民族大学材料科学与工程学院,宁夏硅靶及硅碳负极材料工程技术研究中心,银川 750021
    3.贺兰山实验室半导体晶体与陶瓷材料研究所,银川 750021
  • 收稿日期:2025-06-17 出版日期:2025-12-20 发布日期:2026-01-04
  • 通信作者: 杨少林,博士,副教授。E-mail:slyang@nun.edu.cn
  • 作者简介:王忠保(1991—),男,宁夏回族自治区人,助理工程师。E-mail:wangzb@ftwafer.com
  • 基金资助:
    2023年银川市科技支撑项目(2023GXHZC02);2024年宁夏回族自治区重点研发计划项目(2024BEE02012)

Effect of Magnetic Field Strength on the Uniformity of COP Defects in 12 Inch Cz Monocrystalline Silicon

WANG Zhongbao1(), ZHANG Youhai1, LIU Tianpei2, NI Haoran1, RUI Yang1, MA Cheng1, WANG Liguang1, CAO Qigang1, YANG Shaolin2,3()   

  1. 1. Ningxia Research Center of Semiconductor-grade Silicon Wafer Materials Engineering Technology,Ningxia Zhongxin Wafer Semiconductor Technology Co. ,Ltd. ,Yinchuan 750021,China
    2. Ningxia Research Center of Silicon Target and Silicon-Carbon Negative Materials Engineering Technology,School of Materials Science and Engineering,North Minzu University,Yinchuan 750021,China
    3. Institute of Semiconductor Crystals and Ceramic Materials,Helanshan Laboratory,Yinchuan 750021,China
  • Received:2025-06-17 Online:2025-12-20 Published:2026-01-04

摘要: 在半导体制造中,直拉(Cz)法生长的单晶硅是微电子器件的核心基材,其晶体完整性及缺陷分布对芯片良品率和可靠性至关重要。然而,Cz法生长过程中晶体原生颗粒(COP)缺陷径向分布不均匀的问题亟待解决。本文通过数值模拟与实验研究,探讨了不同横向磁场强度(500和3 000 Gs)对12英寸(1英寸=2.54 cm)Cz单晶硅拉制过程中熔体对流、熔体温度分布及固液界面温度梯度的影响,并分析了磁场强度对COP分布均匀性的作用机制。结果表明:3 000 Gs磁场强度下的熔体流动、温度分布及固液界面温度梯度更加稳定,有利于形成低密度且均匀的COP分布;而500 Gs磁场强度下,晶棒从头到尾的COP均呈现出高密度且不均匀的分布。实验结果与数值模拟结果一致,验证了磁场强度对COP分布均匀性的显著影响。本研究为优化Cz法单晶硅生长工艺、提高晶体质量提供了理论依据和实践指导。

关键词: 单晶硅; 半导体; 磁场强度; 直拉法; COP; 均匀性

Abstract: In semiconductor manufacturing, monocrystalline silicon grown by Czochralski (Cz) method serves as the core substrate for microelectronic devices, with its crystal integrity and defect distribution being crucial for chip yield and reliability. However, the issue of non-uniform radial distribution of crystal originated particle (COP) defects during the Cz growth process urgently needs to be addressed. This paper investigates, through numerical simulations and experimental research, the effects of different transverse magnetic field strengths (500 and 3 000 Gs) on melt convection, melt temperature distribution, and the temperature gradient at the solid-liquid interface during the pulling of 12 inch (1 inch=2.54 cm) Cz monocrystalline silicon. It also analyzes the mechanism by which magnetic field strength influences the uniformity of COP distribution. The results indicate that under a 3 000 Gs magnetic field, the melt flow, temperature distribution, and the temperature gradient at the solid-liquid interface are more stable, facilitating the formation of a low-density and uniform COP distribution. In contrast, under a 500 Gs magnetic field strength, the COP distribution throughout the silicon ingot exhibits high density and non-uniformity. The experimental results are consistent with the numerical simulations, verifying the significant impact of magnetic field strength on the uniformity of COP distribution. This study provides a theoretical basis and practical guidance for optimizing the Cz monocrystalline silicon growth process and improving crystal quality.

Key words: monocrystalline silicon; semiconductor; magnetic field strength; Czochralski method; COP; uniformity

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