MOS结构电容高频C-V特性的应用  

Application of High Frequency Capacitance-Voltage Characterization of MOS Struture

作　　者：熊海[1,2] 孔学东[2] 章晓文[2] 

机构地区：[1]广东工业大学材料学院,广州510006 [2]工业和信息化部电子第五研究所,广州510610

出　　处：《半导体技术》2010年第1期94-98,共5页Semiconductor Technology

摘　　要：CMOS工艺的发展要求栅介质层厚度不断减薄,随着栅极漏电流的不断增大使用准静态的方法测量器件特性不稳定。根据这一情况,提出用高频电容电压(C-V)来评价深亚微米和超深亚微米器件工艺。通过高频C-V法结合MOS相关理论可以得到介质层的厚度、最大耗尽层宽度、阈值电压、平带电压等参数以及栅介质层中各种电荷密度的分布,用以评价栅介质层和衬底的界面特性。文章提出通过电导对测量结果进行修正,使其能够适用更小尺寸器件的要求,使高频C-V法能够在不同的工艺下得到广泛的应用。The thickness of gate oxide have been scaled down aggressively with the development of the CMOS technologies. However, the leakage current has increased drastically which made the measurement of quasi-static is instability. The processes of deep-submieron and uhra-deep-submicron devices were controlled and evaluated by high frequency capacitor-voltage （C-V） method. By this way, according the MOS theory we can extract the parameters of the MOS devices including the thickness of the dielectric, the maximal width of the depletion layer, threshold voltage, flat voltage, and the distribution of the charges in dielectric, which is used to evaluate the characterization of the interface state between substrate and dielectric. A method can correct the measurement result by conductance has been proposed in this paper to made the mehod of high frequency C-V can used in smaller dimension devices. This can enable the high frequency C-V meathod to use in more widely.

关 键 词：MOS电容 电荷密度 界面态 高频C-V 

分 类 号：TN32[电子电信—物理电子学]