节点文献
脉冲激光沉积制备的HfO2薄膜的结构与电学性能
Structure and electric properties of HfO2 films prepared by pulsed laser deposition
【作者】 王毅; 王浩; 张志鹏; 莫琦; 冯洁; 朱建华; 杨辅军; 汪汉斌;
【Author】 WANG Yi~2 WANG Hao~1 ZHANG Zhi-peng~1 MO Qi~1 FENG Jie~1 ZHU Jian-hua~1 YANG Fu-jun~1 WANG Han-bin~1 (1.Faculty of Physics and Electronic Technology,Hubei University,Wuhan 430062,China;2.Faculty of Materials Science and Engineering,Hubei University,Wuhan 430062,China)
【机构】 湖北大学材料科学与工程学院; 湖北大学物理学与电子技术学院;
【摘要】 采用脉冲激光沉积(PLD)方法在 Si(100) 基底上制备了有效氧化层厚度为8.6nm,介电常数为 29.3的 HfO2薄膜.借助 X 射线衍射(XRD)、原子力显微镜(AFM)、高分辨透射电镜(HRTEM)分析了样品的微观结构,对电容的 C-V 与 I-V 电学特性进行了测试.实验结果表明,该方法制得的 HfO2薄膜表面光滑,N2 500℃下退火30min 后样品表面粗糙度由0.203nm 变为 0.498nm,薄膜由非晶转变为简单正交结构,界面层得到有效控制,该栅介质电容具有良好的 C-V 特性,较低的漏电流密度(4-3×10-7A/cm2,@-1V),是 SiO2栅介质的理想替代物.
【Abstract】 High-K gate dielectric hafnium dioxide films were grown on Si(100)substrate by pulsed laser deposition at room temperature.Their micro-structure and electrical properties were characterized by X-ray diffraction,atomic force microscopy,high-resolution transmission electron microscopy and capacitance-voltage and current-voltage measurements using Pt electrodes.The result indicates that as-deposited HfO2 films are amorphous and a transition to orthorhombic after annealing in N2.The electrical properties were characterized by capacitance-voltage and current-voltage measurements using Pt electrodes.High quality HfO2 gate dielectric thin films with smooth surface which root mean square roughness of 0.498nm,equivalent oxide thickness(EOT)of 8.6nm,high dielectric constant(29.3),and low leakage current density of 4.2×10-7A/cm2 at bias voltage 1.5V has been obtained.
【Key words】 pulsed laser deposition; hafnium dioxide films; electrical properties;
- 【会议录名称】 第六届中国功能材料及其应用学术会议论文集(2)
- 【会议名称】第六届中国功能材料及其应用学术会议
- 【会议时间】2007-11
- 【会议地点】中国湖北武汉
- 【分类号】TB383.2
- 【主办单位】重庆仪器材料研究所、中国仪器仪表学会仪表材料分会、国家仪表功能材料工程技术研究中心