期刊
JOURNAL OF PHYSICS D-APPLIED PHYSICS
卷 38, 期 18, 页码 3395-3402出版社
IOP PUBLISHING LTD
DOI: 10.1088/0022-3727/38/18/012
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An inductively coupled SF6/O-2 plasma is used to form a columnar microstructure (CMS) on silicon samples cooled at very low temperature (similar to -100 degrees C). The formation of this CMS is studied as a function of bias voltage, temperature, RF power and gas pressure. The characteristic mean diameter and mean height of the microstructure are evaluated by image processing tools from SEM micrographs. A crystallographic effect is also observed at very low temperature, which induces a needle-shaped structure. A physical mechanism is proposed to explain the formation of this CMS.
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