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采用固相外延的方法在Si(100)衬底上生长了C组分为0.5at.%的Si1-yCy合金,并对合金的质量及特性进行了测试分析.采用多重离子注入的方法,并利用SiO2做缓冲层,能够获得满意的C离子分布.小束流、长时间的注入方法能避免β-SiC相的出现,最大限度地抑制动态退火效应.对Si衬底进行非晶化预处理能显著提高代位C原子的比例.两步退火过程能有效地减少注入前沿的点缺陷,实现较好的外延生长
The solid phase epitaxy method is used to grow a C component of 0.5 at. On a Si (100) substrate. % Si1-yCy alloy, and the quality and characteristics of the alloy were tested and analyzed. Using multiple ion implantation methods, and the use of SiO2 as a buffer layer, can be satisfied with the C ion distribution. The small beam current and long time injection method can avoid the appearance of β-SiC phase and minimize the dynamic annealing effect. Amorphous pretreatment of Si substrate can significantly increase the proportion of substitutional C atoms. The two-step annealing process can effectively reduce the point defects in the forefront of implantation and achieve better epitaxial growth