欢迎访问《人工晶体学报》官方网站,今天是

人工晶体学报 ›› 2026, Vol. 55 ›› Issue (5): 772-781.DOI: 10.16553/j.cnki.issn1000-985x.2026.0007

• 研究论文 • 上一篇    下一篇

新型复合终端结构横向 β -Ga2O3场效应晶体管电学特性仿真研究

李子唯1,2(), 余建刚1,2(), 刘晋花2,3, 李腾腾1,2, 杨晓利4, 雷程1,2, 梁庭1,2   

  1. 1.中北大学半导体与物理学院,太原 030051
    2.中北大学宽禁带半导体超越照明材料与技术全国重点实验室,太原 030051
    3.太原师范学院物理系,晋中 030600
    4.重庆邮电大学数学与统计学院,重庆 400056
  • 收稿日期:2026-01-13 出版日期:2026-05-20 发布日期:2026-06-09
  • 通信作者: 余建刚,博士,副教授。E-mail:yujg@nuc.edu.cn
  • 作者简介:李子唯(2000—),女,内蒙古自治区人,硕士研究生。E-mail:lzw14710@163.com
  • 基金资助:
    山西省重点研发计划(202302030201001);山西省科技重大专项“揭榜挂帅”项目(202301030201003);中国博士后科学基金(2024MD754039);仪器科学与动态测试教育部重点实验室开放基金资助(JYBSYSKFJJ319008)

Simulation Study on Electrical Characteristics of New Composite Terminal Structure Lateral β -Ga2O3 Field-Effect Transistors

LI Ziwei1,2(), YU Jiangang1,2(), LIU Jinhua2,3, LI Tengteng1,2, YANG Xiaoli4, LEI Cheng1,2, LIANG Ting1,2   

  1. 1.School of Semiconductor and Physics,North University of China,Taiyuan 030051,China
    2.State Key Laboratory of Widegap Semiconductor Optoelectronic Materials and Technologies,North University of China,Taiyuan 030051,China
    3.Department of Physics,Taiyuan Normal University,Jinzhong 030600,China
    4.School of Mathematics and Statistics,Chongqing University of Posts and Telecommunications,Chongqing 400056,China
  • Received:2026-01-13 Online:2026-05-20 Published:2026-06-09

摘要: 氧化镓(β-Ga2O3)功率器件因具有高耐压、低损耗及低成本的优势,已成为当前研究的热点,但受限其P型有效掺杂困难,基于β-Ga2O3的同质结器件研究受阻,而异质结终端器件仍存在导通电阻大、击穿电压低等电学特性不能满足实际应用需求的问题。针对以上问题,本文创新性提出了一种由NiO组成的场限环与浮空场板组成的复合终端增强型横向NiO/β-Ga2O3异质结场效应晶体管(HJFET)。通过TCAD软件重点研究了浮空场板长度及场限环长度、厚度对器件击穿特性的影响。结果表明:场限环与浮空场板组合可以有效缓解栅极边缘电场集中效应,同时高介电常数介质HfO2可将异质结边缘电场调控至β-Ga2O3沟道内,最终器件实现了2 537 V的高击穿电压。对于具有浮空场板的器件获得了导通电阻为14.21 mΩ·cm2,击穿电压为2 358 V,PFOM达到391.285 MW·cm-2的优异性能。本研究的设计为大功率高耐压β-Ga2O3功率器件的设计和优化提供了新的思路。

关键词: β-Ga2O3功率器件; 增强型异质结场效应晶体管; HfO2; p-NiO; 场限环; 浮空场板; 边缘电场集中

Abstract: Gallium oxide (β-Ga2O3) power devices have emerged as a prominent research focus owing to their advantages of high voltage resistance, low loss, and low cost-effectiveness. However, the development of β-Ga2O3 based homojunction devices remains impeded by the persistent challenge of achieving reliable and controllable P-type doping. Meanwhile, the heterojunction termination devices still have problems that the electrical characteristics such as high on-resistance and low breakdown voltage, which fail to meet the requirements of practical applications. To address the aforementioned issues, this paper innovatively proposed a composite terminal enhanced lateral NiO/β-Ga2O3 heterojunction field effect transistor (HJFET) consisting of a field-limiting ring and a floating field plate made of NiO. The effects of the length of the floating field plate and the length and thickness of the field-limiting ring on the breakdown characteristics of the device were studied in detail using the TCAD software. The results show that the combination of the field-limiting ring and the floating field plate can effectively alleviate the edge electric field concentration effect at the gate, and the high dielectric constant dielectric HfO2 can regulate the edge electric field of the heterojunction to be within the channel of β-Ga2O3. Eventually, the device achieves a high breakdown voltage of 2 537 V. For the device with the floating field plate, a low on-resistance of 14.21 mΩ·cm2, a breakdown voltage of 2 358 V, and a PFOM of 391.285 MW·cm-2 are obtained. The design of this study provides a new idea for the design and optimization of high-power and high-voltage gallium oxide power devices.

Key words: β-Ga2O3 power device; enhanced HJFET; HfO2; p-NiO; field-limiting ring; floating field plate; edge electric field concentration

中图分类号: