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- 저자 : Keiichiro Hosobuchi (검색결과 1 건)
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Zhigang Jia,So Ito,Keiichiro Hosobuchi,Shigeaki Goto,Yuki Shimizu,Gaofa He,Wei Gao 한국정밀공학회 2013 International Journal of Precision Engineering and Vol. No.
This paper presents the electrostatic force characterization of a prototype scanning electrostatic force microscope (SEFM) system developed for surface profile measurement in noncontact condition. In the SEFM system, with applying a dual height method, the distance between the probe tip and the sample surface can be accurately obtained by removing the influence of the electric field distribution on the sample surface. Since the electrostatic force is greatly influenced by the capacitance between the probe tip and the sample surface, a new approach for modeling and characterization of the distribution of capacitance between the probe tip with an arbitrary shape and the sample surface with a random topography by using the finite difference method (FDM) is proposed. The electrostatic forces calculated by the FDM method and the conventional sphere-plane model are compared to verify the validity of the FDM method. The frequency shift values measured by the experiment are also compared with the simulation results calculated by the FDM method. It has been demonstrated that the electrostatic force between arbitrary shapes of the probe tip and the sample surface can be well calculated by the FDM.
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