کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1677527 1518354 2013 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Simulation of the backscattered electron intensity of multi layer structure for the explanation of secondary electron contrast
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Simulation of the backscattered electron intensity of multi layer structure for the explanation of secondary electron contrast
چکیده انگلیسی

The intensities of the secondary electrons (SE) and of the backscattered electrons (BSE) at energy 100 eV have been measured on a Ni/C/Ni/C/Ni/C/(Si substrate) multilayer structure by exciting it with primary electrons of 5, 2.5 and 1.25 keV energies. It has been found that both intensities similarly vary while thinning the specimen. The difference as small as 4 nm in the underlying layer thicknesses resulted in visible intensity change. Utilizing this intensity change, the thickness difference of neighboring regions could be revealed from the SE image. No simple phenomenological model was found to interpret the change of intensity, thus the intensity of the BSE electrons has been calculated by means of a newly developed Monte Carlo simulation. This code also considers the secondary electron generation and transport through the solid. The calculated and measured intensities agree well supporting the validity of the model.


► similarities in scanning electron microscopy and backscattered electrons were used.
► MC algorithm for sample made from metal and semiconductor layers was workout.
► electron backscattering depth dependence resembles Auger depth profiling curves.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 124, January 2013, Pages 88–95
نویسندگان
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