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表面预处理对HfO2栅介质MOS器件漏电特性的影响
Effects of Surface Pretreatments on Leakage Properties of MOS Devices with HfO2 as Gate Dielectrics
【摘要】 采用反应磁控溅射方法,在Si衬底上制备了不同表面预处理和不同后退火处理的HfO2栅介质MOS电容。测量了器件的C-V和I-V特性,并进行了高场应力实验。器件的界面特性和栅极漏电机理分析表明,界面态和氧化物陷阱是引起大的栅极漏电流的主要因素。采用新颖的O2+CHCl3(TCE)表面预处理工艺,可以显著降低界面态和氧化物陷阱密度,从而大大减小栅极漏电流和SILC效应。
【Abstract】 Using reactive magnetron sputtering,HfO2 gate dielectric films with different pretreatments and annealing conditions were deposited on n-Si(100)substrates.Analysis of leakage current and SILC effects shows that the interface property was obviously improved by O2+CHCl3(TCE)pretreatments,thus reducing gate leakage current and SILC effects.
【关键词】 HfO2;
MOS器件;
栅极漏电流;
SILC效应;
界面态;
氧化物陷阱;
【Key words】 HfO2; MOS device; Gate leakage current; SILC effects; Interface trapped charge; Oxide charge;
【Key words】 HfO2; MOS device; Gate leakage current; SILC effects; Interface trapped charge; Oxide charge;
【基金】 国家自然科学基金资助项目(60376019);湖北省自然科学基金资助项目(2003ABA087)
- 【文献出处】 微电子学 ,Microelectronics , 编辑部邮箱 ,2006年04期
- 【分类号】TN386
- 【被引频次】3
- 【下载频次】194