基于HfO2/SiO2的高分解和低泄漏的4H-SiC MOS电容器在沟结构中堆叠的门介电
Qimin Huang1,2,3, Yunduo Guo1,2,3, Anfeng Wang1,2,3
1Institute of Wide Bandgap Semiconductors and Future Lighting, Academy for Engineering & Technology, Fudan University, Shanghai 200433, China.
这项研究通过研究HfO2和SiO2/HfO2门介电物优化了碳化 (SiC) 沟沟MOSFET. SiO2 / HfO2堆显著改善了分解场和减少了泄漏电流,以提高设备性能.
科学领域:
- 材料科学 材料科学 材料科学
- 电气工程 电气工程
- 半导体物理 半导体物理
背景情况:
- 碳化 (SiC) MOSFET正在从平面结构向沟结构发展.
- 在沟结构中优化门氧化物层对于SiC MOSFET的性能至关重要.
- 像HfO2这样的高k介电材料正在探索用于先进的半导体设备.
研究的目的:
- 在SiC沟结构上研究HfO2和SiO2/HfO2门介电物的接口特性.
- 评估SiO2中间层对介电性质和设备性能的影响.
- 分析泄漏电流机制和故障行为.
主要方法:
- 原子层沉积 (ALD) 用于介电增长.
- 扫描电子显微镜 (SEM) 用于沟形态.
- 原子力显微镜 (AFM) 用于表面粗度.
- 对薄膜厚度进行光谱圆测量 (SE).
- 用于电子结构分析的X射线光电子光谱 (XPS).
- 电气特性 (故障场,泄漏电流).
主要成果:
- 无论是HfO2还是SiO2/HfO2薄膜都表现出低粗度 (<1nm) 和可比厚度.
- XPS证实SiO2中间层对HfO2电子结构的影响最小.
- HfO2薄膜的分解场为4.1 MV/cm,泄漏电流为1.1 × 10^-3 A/cm^2.
- SiO2/HfO2叠叠膜表现出卓越的性能:6.5 MV/cm的分解场和3.7 × 10^-4 A/cm^2的泄漏电流.
- 分析表明SiO2介层减轻了带隙补偿问题.
结论:
- 堆叠的SiO2/HfO2介电器显著提高了SiC沟MOSFET的性能.
- 引入薄的SiO2接口层有效地减少了泄漏电流.
- 优化门介电材料对于下一代SiC电源设备至关重要.
更多相关视频
08:17Autonomous and Rechargeable Microneurostimulator Endoscopically Implantable into the Submucosa
Published on: September 27, 2018
08:59Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance
Published on: November 30, 2022
相关概念视频
MOS Capacitor
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
Capacitor With A Dielectric
Dielectrics are non-conducting materials with no free or loosely bound electrons. When a dielectric is...
Dielectric Polarization in a Capacitor
Characteristics of MOSFET
Various vital parameters influence their functionality, which is crucial for theory and electronics applications. First, channel dimensions, precisely length, and width, are pivotal. The size of these channels affects the transistor's ability to carry current and switching speeds; shorter channels typically enable...
Spherical and Cylindrical Capacitor
Conventionally, considering the symmetry, the electric field between the concentric shells of a spherical capacitor is directed radially outward. The magnitude of the field,...
MOSFET: Enhancement Mode
In their basic form, enhancement-mode MOSFETs are typically non-conductive when the gate-source voltage (Vgs) is zero. This default 'off' state means no...
