Evolution of vacancy-like defects in helium-implanted (100) silicon studied by thermal desorption spectrometry

被引:13
作者
Corni, F [1 ]
Calzolari, G [1 ]
Gambetta, F [1 ]
Nobili, C [1 ]
Tonini, R [1 ]
Zapparoli, M [1 ]
机构
[1] Univ Modena, INFM, Dipartimento Fis, I-41100 Modena, Italy
来源
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY | 2000年 / 71卷
关键词
radiation damage; vacancies; cavities; helium implantation; silicon;
D O I
10.1016/S0921-5107(99)00376-1
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Thermal desorption spectrometry (TDS) has been applied to investigate the thermal evolution of vacancy-like defects in helium-implanted (100) silicon samples with a dose of 2 x 10(16) cm(-2) at 20 keV. The measured spectra present features which can be interpreted as fingerprints of the modifications occurring in the sample. The defects that are recognized which affect the desorption are: thermally unstable helium-vacancy complexes, pressurized gas bubbles organized in planar structures (cracks) and thermally stable cavities. The attribution is supported by the results obtained by complementary techniques, such elastic recoil detection, channeling Rutherford backscattering spectrometry, cross sectional transmission electron microscopy and positron annihilation spectroscopy which have been employed on isothermally preannealed samples in the range 100-800 degrees C (C) 2000 Elsevier Science S.A. All rights reserved.
引用
收藏
页码:207 / 212
页数:6
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