采用固源分子束外延(SSMBE)技术,在α-Al2O3(0001)衬底上直接制备出了SiC薄膜.利用反射式高能电子衍射(RHEED)、Raman光谱、X射线扫描、傅里叶变换红外光谱(FT-IR)、X射线衍射(XRD)等实验技术,对生长的样品的结构和结晶质量进行了表征.结果表明:在蓝宝石衬底上生长出了结晶性能良好的6H-SiC薄膜,且薄膜中存在较小的压应力,这种压应力是由薄膜与衬底之间热膨胀系数的差异所致.
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