| CPC H01L 21/31116 (2013.01) [H01J 37/32082 (2013.01); H01J 37/32449 (2013.01); H01J 37/32568 (2013.01); H01L 21/3065 (2013.01); H01L 21/31144 (2013.01); H01J 2237/334 (2013.01)] | 18 Claims |

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1. A plasma etching method, comprising:
etching a silicon-comprising film by using plasma of a hydrofluorocarbon gas,
wherein the hydrofluorocarbon gas comprises
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