NEGATIVE HYDROGENATED SILICON ION CLUSTERS AS PARTICLE PRECURSORS IN RF SILANE PLASMA DEPOSITION EXPERIMENTS

被引:106
作者
HOWLING, AA
SANSONNENS, L
DORIER, JL
HOLLENSTEIN, C
机构
[1] Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, Lausanne, CH-1007
关键词
D O I
10.1088/0022-3727/26/6/019
中图分类号
O59 [应用物理学];
学科分类号
摘要
Stable negative ions containing up to sixteen silicon atoms have been measured by mass spectrometry in RF power-modulated silane plasmas for amorphous silicon deposition. These hydrogenated silicon cluster ions reach much higher masses than the positive ions, which have no more than six silicon atoms. This supports the view that negative ions are the precursors to particulate formation in silane plasmas. The time-dependent fluxes of positive and negative ions from the plasma are shown with a 5 mus time resolution. Possible cluster reaction sequences are discussed and the effect of visible light on the negative ion signal is commented upon.
引用
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页码:1003 / 1006
页数:4
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