纳米Al薄膜表面形貌与导电性的分形表征

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磁控溅射法在Si(111)基底上制备了纳米Al薄膜,用高度相关函数法对薄膜的原子力显微镜图像进行分形维计算,并用四点探针法测量了薄膜电阻.结果表明,随着溅射时间的延长,薄膜表面质量提高,分形维增大,电阻率也随着分形维的增大而增大;随着退火温度的上升,薄膜表面质量下降,分形维和电阻率也随之降低.因此认为,分形维能够较好的表征薄膜表面形貌,分形维与薄膜电阻率存在对应关系,并指出用分形维可以优化溅射工艺参数.
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