应用化学 ›› 2022, Vol. 39 ›› Issue (10): 1579-1585.DOI: 10.19894/j.issn.1000-0518.210562

• 研究论文 • 上一篇    下一篇

聚醚胺表面活性剂在铜阻挡层抛光中的应用

刘琳1(), 何华锋1,2()   

  1. 1.同济大学材料科学与工程学院,上海 200092
    2.安集微电子科技(上海)股份有限公司,上海 201203
  • 收稿日期:2021-12-10 接受日期:2022-04-21 出版日期:2022-10-01 发布日期:2022-10-05
  • 通讯作者: 刘琳,何华锋
  • 作者简介:第一联系人:共同第一作者

Application of Polyether Amines in Copper Barrier Chemical Mechanical Polishing Slurry

Lin LIU1(), Hua-Feng HE1,2()   

  1. 1.School of Materials Science and Engineering,Tongji University,Shanghai 200092,China
    2.Anji Microelectronics (Shanghai) Co. ,Ltd. ,Shanghai 201203,China

摘要:

表面活性剂在铜阻挡层抛光液中可用于改善表面缺陷及降低边缘过度侵蚀。本文研究了聚醚胺表面活性剂用于铜阻挡层抛光液中,对阻挡层材料Cu/Ta/TiN/SiO2/低k(low-k)材料去除速率、表面缺陷、润湿性能、分散性能和图形化晶圆表面缺陷的影响。结果表明,随聚醚胺质量分数从0%提高到0.05%low-k材料去除速率降低68%~85%,表面缺陷明显改善,low-k材料表面残留颗粒数量降低约80%,图形化晶圆边缘过度侵蚀(EOE)缺陷减少约70%,能够很好地保护low-k材料表面。

关键词: 聚醚胺, 化学机械抛光, 铜阻挡层

Abstract:

The low-k dielectric materials with their low mechanical strength and high porosity for advanced IC processes pose great challenges in barrier CMP slurries, requiring favorable advantages in high removal rate, adjustability, lower surface defects and improved edge over erosion (EOE). In this paper, the effects of polyether amines on the removal rate and defects toward low-k materials are studied. The results show that the removal rate of low-k material decreases by 68%~85%, the number of residual particles on the surface of low-k material decreases by 80%, and EOE decreases by 2/3, which meets the requirements of advanced technology for barrier CMP slurries.

Key words: Polyether amine, Chemical mechanical polishing, Copper barrier materials

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