采用射频等离子体化学气相沉积(RF-PECVD)方法制备了沉积时间系列的微晶硅薄膜.采用椭圆偏振光谱仪(SE)和原子力显微镜(AFM)表征薄膜表面粗糙度,分析了表面粗糙度随沉积时间的演化行为.讨论了这两种测量手段在分析薄膜表面粗糙度时的差异.结果表明,采用SE拟合得到的表面粗糙度数值要大于采用AFM直接测量得到的结果.产生差异的原因,一是由于两种测量手段的测量机制不同;二是由于薄膜的结构不均匀导致薄膜表面形貌差异.另外,还发现这两种测量手段得到的表面粗糙度数值之间存在线性关系.
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