Paper Title:
Measuring and Machining of Ripples on Silicon Surface with Femtosecond Pulse Laser
  Abstract

Experiments are carried out on a femtosecond laser micromachining system with the wavelength 775nm. The ablated patterns on Si (100) and Si (111) surfaces affected by femtosecond pulse laser parameters are presented. The periodic structure termed ripples on silicon surface is investigated. Two kinds of ripples on the ablated surface are observed by SEM. The whole ablation region indicates the ablated field of all amount of laser energy. The ablation region forms two circular areas. The cross section image of the ablated region is showed which is cut by FIB in the orthogonal direction of the line of the center ripples. The depth of ripples is measured. Adjusted the laser fluence as about 0.3~0.33J/cm2 and the pulse number as changeable from 1 to 50, the forming process of the ripples is observed and studied by AFM. Another experiment is done that the wave-plates are inserted into the space between the objective and sample, the result of the direction of ripples changed with the wave-plates of 1/2 or 1/4 is reviewed.

  Info
Periodical
Key Engineering Materials (Volumes 381-382)
Edited by
Wei Gao, Yasuhiro Takaya, Yongsheng Gao and Michael Krystek
Pages
101-104
DOI
10.4028/www.scientific.net/KEM.381-382.101
Citation
X. Fu, L. Li, Y. Wu, N. Geng, "Measuring and Machining of Ripples on Silicon Surface with Femtosecond Pulse Laser", Key Engineering Materials, Vols. 381-382, pp. 101-104, 2008
Online since
June 2008
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$32.00
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