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Complementary study of the internal porous silicon layers formed under high-dose implantation of helium ions

机译:在高剂量植入氦离子下形成的内部多孔硅层的互补研究

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The surface layers of Si(001) substrates subjected to plasma-immersion implantation of helium ions with an energy of 2-5 keV and a dose of 5 x 10(17) cm(-2) have been investigated using high-resolution X-ray reflectivity, Rutherford backscattering, and transmission electron microscopy. The electron density depth profile in the surface layer formed by helium ions is obtained, and its elemental and phase compositions are determined. This layer is found to have a complex structure and consist of an upper amorphous sublayer and a layer with a porosity of 30-35% beneath. It is shown that the porous layer has the sharpest boundaries at a lower energy of implantable ions.
机译:使用高分辨率X-研究了对具有2-5keV的能量为2-5keV的氦离子的溶液浸没氦离子的底物的表面层和剂量为5×10(-2)的剂量。 射线反射率,Rutherford反向散射和透射电子显微镜。 得到由氦离子形成的表面层中的电子密度深度分布,并测定其元素和相组合物。 发现该层具有复杂的结构并且由上部非晶层和孔隙率下方的层组成。 结果表明,多孔层具有在植入离子的较低能量下具有最小的边界。

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