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首页> 外文期刊>Japanese journal of applied physics >Highly Selective Etching of SiO_2 over Si_3N_4 and Si in Capacitively Coupled Plasma Employing C_5HF_7 Gas
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Highly Selective Etching of SiO_2 over Si_3N_4 and Si in Capacitively Coupled Plasma Employing C_5HF_7 Gas

机译:使用C_5HF_7气体的电容耦合等离子体中Si_3N_4和Si上SiO_2的选择性刻蚀

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摘要

In a dual-frequency-excited parallel plate capacitively coupled plasma employing a heptafluoro-cyclo-pentene (C5HF7) gas with addition of O_2 and dilution in Ar gas, highly selective etching of SiO_2 at selectivities of 40 against Si_3N_4 and 57 against polycrystalline Si was realized. Gas phase fluorocarbon species containing H atoms such as C_xHF_y (x > 2) played key roles in the selective deposition of thick hydrofluorocarbon films that covered the Si_3N_4 and polycrystalline silicon (poly-Si) surfaces and in the selective etching of SiO_2 over the photoresist, SiN, and Si.
机译:在使用七氟环戊烯(C5HF7)气体并添加O_2并在Ar气体中稀释的双频激励平行板电容耦合等离子体中,SiO 2的高选择性刻蚀对Si_3N_4的选择性为40,对多晶硅的选择性为57。实现。含有H原子的气相碳氟化合物(例如C_xHF_y(x> 2))在覆盖Si_3N_4和多晶硅表面的厚氢氟碳膜的选择性沉积以及光致抗蚀剂上的SiO_2的选择性蚀刻中起着关键作用, SiN和Si。

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  • 来源
    《Japanese journal of applied physics》 |2013年第1issue1期|016201.1-016201.9|共9页
  • 作者单位

    Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan;

    Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan;

    Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan;

    Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan;

    Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan;

    Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan;

    Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan;

    Research & Development Center, ZEON Corporation, Kawasaki 210-9507, Japan;

    Research & Development Center, ZEON Corporation, Kawasaki 210-9507, Japan;

    Research & Development Center, ZEON Corporation, Kawasaki 210-9507, Japan;

    Graduate School of Engineering, Nagoya University, Nagoya 464-8603, Japan;

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