Journal of Semiconductors, Volume. 42, Issue 7, 074101(2021)

The investigation of DARC etch back in DRAM capacitor oxide mask opening

Jianqiu Hou1, Zengwen Hu1, Kuowen Lai2, Yule Sun2, Bo Shao2, Chunyang Wang2, Xinran Liu2, and Karson Liu2
Author Affiliations
  • 1Advanced Micro-Fabrication Equipment Inc. China, Shanghai 201201, China
  • 2ChangXin Memory Technologies Inc., Hefei 230093, China
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    References(9)

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    [2] Y Kim, S Lee, T Jung et al. Challenges in high-aspect ratio contact (HARC) etching for DRAM capacitor formation. Proc SPIE, 9428, 942806(2015).

    [3] J M Lee, P H Choi, S K Kim et al. New method for reduction of the capacitor leakage failure rate without changing the capacitor structure or materials in DRAM mass production. IEEE Trans Electron Devices, 65, 4839(2018).

    [4] D E Kotecki. A review of high dielectric materials for DRAM capacitors. Integr Ferroelectr, 16, 1(1997).

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    [6] I Chun, A Efremov, G Y Yeom et al. A comparative study of CF4/O2/Ar and C4F8/O2/Ar plasmas for dry etching applications. Thin Solid Films, 579, 136(2015).

    [7] B E E Kastenmeier, P J Matsuo, J J Beulens et al. Chemical dry etching of silicon nitride and silicon dioxide using CF4/O2/N2 gas mixtures. J Vac Sci Technol A, 14, 2802(1996).

    [8] T E F M Standaert, C Hedlund, E A Joseph et al. Role of fluorocarbon film formation in the etching of silicon, silicon dioxide, silicon nitride, and amorphous hydrogenated silicon carbide. J Vac Sci Technol A, 22, 53(2004).

    [9] C J Mogab, A C Adams, D L Flamm. Plasma etching of Si and SiO2—The effect of oxygen additions to CF4 plasmas. J Appl Phys, 49, 3796(1978).

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    Jianqiu Hou, Zengwen Hu, Kuowen Lai, Yule Sun, Bo Shao, Chunyang Wang, Xinran Liu, Karson Liu. The investigation of DARC etch back in DRAM capacitor oxide mask opening[J]. Journal of Semiconductors, 2021, 42(7): 074101

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    Paper Information

    Category: Research Articles

    Received: Jan. 15, 2021

    Accepted: --

    Published Online: Jul. 14, 2021

    The Author Email:

    DOI:10.1088/1674-4926/42/7/074101

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