کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9817468 | 1518765 | 2005 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ion backscattering study of ultra-thin oxides: Al2O3 and AlHfOx films on Si
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کلمات کلیدی
Rutherford backscattering spectroscopy (RBS)85.30.Tv82.80.Yc78.30.Am61.85.+p - + 61.85. + pAluminum oxide - اکسید آلومینیوم Hafnium oxide - اکسید هافنیومSemiconductor devices - دستگاه نیمه هادیAtomic layer deposition (ALD) - رسوب لایه اتمی (ALD)High-k materials - مواد با کیفیت بالاChanneling - کانال کردن
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Ultra-thin films of aluminum oxide and hafnium oxide are currently being explored as high-k gate dielectrics for next generation CMOS and related devices. Among the many methods to produce such films, atomic layer deposition (ALD) appears very promising as it enables deposition of ultra-thin layers on Si and other substrates with monolayer control. For device applications, it is critical to be able to measure and control the total oxide film thickness, as well as that of the SiO2 which often forms at the high-k/Si interface. In this work we show how Hf, O, Al and Si from ultra-thin oxides can be detected and separated from the Si substrate scattering spectrum. In order to separate the Si substrate signal from the amorphous ultra-thin oxide O, Al and Si signals, ion channeling is applied. While the separation of Al and Si signals from thin oxide layers in typical 2 MeV He RBS is difficult due to the small mass difference, we demonstrate that separating these signals is possible using higher energy scattering, 2.7 MeV. The effects of non-Rutherford scattering cross-sections, including the O(α, α)O resonance at 3030 keV, will be discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 241, Issues 1â4, December 2005, Pages 377-381
Journal: Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms - Volume 241, Issues 1â4, December 2005, Pages 377-381
نویسندگان
Leszek S. Wielunski, Yves Chabal, Margareta Paunescu, M.-T. Ho, Rhett Brewer, Johan E. Reyes,