等离子增强原子层沉积低温生长AlN薄膜

采用等离子增强原子层沉积技术在单晶硅基体上成功制备了AlN晶态薄膜, 利用椭圆偏振仪、原子力显微镜、小角掠射X射线衍射仪、高分辨透射电子显微镜、 X射线光电子能谱仪对样品的生长速率、表面形貌、晶体结构、薄膜成分进行了表征和分析, 结果表明, 采用等离子增强原子层沉积制备AlN晶态薄膜的最低温度为200 ℃, 薄膜表面平整光滑, 具有六方纤锌矿结构与(100)择优取向, Al_2p与N_1S的特征峰分别为74.1 eV与397.0 eV, 薄膜中Al元素与N元素以Al-N键相结合, 且成分均匀性良好. 关键词： 氮化铝 等离子增强原子层沉积 低温生长 晶态薄膜

Low-temperature growth of AlN thin films by plasma-enhanced atomic layer deposition

The crystalline AlN thin film was fabricated on Si(100) substrates by plasma-enhanced atomic layer deposition. Its growth rate was illustrated by spectroscopic ellipsometer. And the surface morphology, crystal structure and composition were characterized by atomic force microscopy, X-ray diffraction, high-resolution transmission electron microscopy and X-ray photoelectron spectroscopy. Results show that the lowest temperature for deposition of the crystalline AlN thin film is 200 ℃, and the film coverage on the substrate surface is continuous and homogeneous. The film prepared with a homogeneous concentration distribution is polycrystalline with a hexagonal wurtzite structure. High resolution Al_2p and N_1s spectra confirm the presence of AlN with peaks located at 74.1 eV and 397.0 eV, respectively.
Keywords： AlN plasma-enhanced atomic layer deposition low-temperature growth crystalline film