Ultraviolet laser microstructuring of silicon and the effect of laser pulse duration on the surface morphology

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• 作者：E. Skantzakis ; V. Zorba ; D.G. Papazoglou ; I. Zergioti and C. Fotakis
• 关键词：Laser materials processing ; Silicon microcones
• 刊名：Applied Surface Science
• 出版年：2006
• 出版时间：30 April 2006
• 年：2006
• 卷：252
• 期：13
• 页码：4462-4466
• 全文大小：280 K

文摘

The study of the laser pulse duration effect on the silicon micro-spikes morphology is presented. The microcones were produced by ultraviolet (248 nm) laser irradiation of doped Si wafers in SF₆ environment. The laser pulse duration was adjusted at 450 fs, 5 ps and 15 ns. We have analyzed the statistical nature of the spikes’ morphological characteristics, such as periodicity and apex angle by exploiting image processing techniques, on SEM images of the irradiated samples. The correlation of the quantitative morphological characteristics with the laser parameters (pulse duration, laser fluence and number of pulses) provides new insight on the physical mechanisms, which are involved on the formation of Si microcones.