中国邮电高校学报(英文) ›› 2024, Vol. 31 ›› Issue (2): 10-16.doi: 10.19682/j.cnki.1005-8885.2024.0012

所属专题: 集成电路

• Semiconductor Devices • 上一篇    下一篇

Trench gate GaN IGBT with controlled hole injection efficiency

黄义1,李玥玥2,高升2,王琦1,韩根全3   

  1. 1. 重庆邮电大学光电工程学院
    2. 重庆邮电大学
    3. 西安电子科技大学
  • 收稿日期:2023-12-04 修回日期:2024-03-05 出版日期:2024-04-30 发布日期:2024-04-30
  • 通讯作者: 高升 E-mail:gaosheng@cqupt.edu.cn
  • 基金资助:
    重庆市自然科学基金面上项目;重庆邮电大学博士科研启动基金;重庆市科技创新与应用示范重点项目

Trench gate GaN IGBT with controlled hole injection efficiency

  • Received:2023-12-04 Revised:2024-03-05 Online:2024-04-30 Published:2024-04-30
  • Contact: Sheng Gao E-mail:gaosheng@cqupt.edu.cn
  • Supported by:
    the General Program of Natural Science Foundation of Chongqing;Doctoral Research Start-up Fund of Chongqing University of Posts and Telecommunications;the Technology Innovation and Application Demonstration key Project of Chongqing Municipality

摘要:

In this paper, a novel trench gate gallium nitride insulated gate bipolar transistor (GaN IGBT), in which the collector is divided into multiple regions to control the hole injection efficiency, is designed and theoretically studied. The incorporation of a P+/P- multi-region alternating structure in the collector region mitigates hole injection within the collector region. When the device is in forward conduction, the conductivity modulation effect results in a reduced storage of carriers in the drift region. As a result, the number of carriers requiring extraction during device turn-off is minimized, leading to faster turn-off speed. The results illustrate that the GaN IGBT with controlled hole injection efficiency (CEH GaN IGBT) exhibits markedly enhanced performance compared to conventional GaN IGBT, showing a remarkable 42.2% reduction in turn-off time and a notable 28.5% decrease in turn-off loss.

关键词:

gallium nitride insulated gate bipolar transistor (GaN IGBT), hole injection, trench gate, turn-off loss

Abstract:

In this paper, a novel trench gate gallium nitride insulated gate bipolar transistor (GaN IGBT), in which the collector is divided into multiple regions to control the hole injection efficiency, is designed and theoretically studied. The incorporation of a P+/P- multi-region alternating structure in the collector region mitigates hole injection within the collector region. When the device is in forward conduction, the conductivity modulation effect results in a reduced storage of carriers in the drift region. As a result, the number of carriers requiring extraction during device turn-off is minimized, leading to faster turn-off speed. The results illustrate that the GaN IGBT with controlled hole injection efficiency (CEH GaN IGBT) exhibits markedly enhanced performance compared to conventional GaN IGBT, showing a remarkable 42.2% reduction in turn-off time and a notable 28.5% decrease in turn-off loss.

Key words:

gallium nitride insulated gate bipolar transistor (GaN IGBT), hole injection, trench gate, turn-off loss