采用自行研制的磁过滤等离子体装置在单晶Si基底上制备了优质类金刚石(DLC)薄膜.运用红外光谱(IR)、扫描电镜(SEM),原子力显微镜(AFM)和纳米压痕仪对样品进行了表征和分析,着重研究了衬底偏压类型对制备薄膜的影响.结果表明:在无偏压或周期性负偏压下制备的DLC薄膜的sp3含量比连续负偏压下制备的薄膜的sp3含量要高;同时在周期性偏压下制备的薄膜表面较光滑,其表面粗糙度仅为0.1 nm,sp3含量达到66.8%,相应的纳米硬度也较高(达到80GPa).同时对相应的成膜机理进行了讨论.
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