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DC and RF Performance of AlGaN/GaN/SiC MOSHEMTs With Deep Sub-Micron T-Gates and Atomic Layer Epitaxy MgCaO as Gate Dielectric

机译:深亚微米T型栅和原子层外延MgCaO作为栅介质的AlGaN / GaN / SiC MOSHEMT的DC和RF性能

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摘要

In this letter, we report on the dc and RF performance of AlGaN/GaN metal-oxide-semiconductor high-electron mobility transistors (MOSHEMTs) with various gate lengths (L) from 90 to 500 nm using atomic-layer-epitaxy single crystalline MgCaO as gate dielectric. The 90-nm T-gate MOSHEMT simultaneously demonstrates a f/f of 113/160 GHz with high on/off ratio of 5 × 10. The on/off ratio increases to 2 × 10 at L = 350 nm by reducing short channel effects. The gate leakage current is around 10 A/mm at off-state and 10 A/mm at on-state. A 160 nm L MOSHEMT also exhibits an output power density of 4.18 W/mm at f = 35 GHz and V = 20 V. MgCaO demonstrates to be a promising dielectric for GaN MOS technology in serving as the surface passivation layer and reducing the gate leakage current while maintaining high RF performances for high-power applications.
机译:在这封信中,我们报告了使用原子层外延单晶MgCaO的栅极长度(L)为90至500 nm的AlGaN / GaN金属氧化物半导体高电子迁移率晶体管(MOSHEMT)的直流和RF性能作为栅极电介质。 90 nm T栅极MOSHEMT同时显示f / f为113/160 GHz,具有5×10的高开/关比。通过减少短沟道效应,在L = 350 nm时,开/关比增加到2×10。截止状态下,栅极泄漏电流约为10 A / mm,导通状态下约为10 A / mm。 160 nm L MOSHEMT在f = 35 GHz和V = 20 V时也表现出4.18 W / mm的输出功率密度。MgCaO在用作表面钝化层并减少栅极泄漏方面证明是GaN MOS技术的有希望的电介质电流,同时保持高功率应用的高射频性能。

著录项

  • 来源
    《IEEE Electron Device Letters》 |2017年第10期|1409-1412|共4页
  • 作者单位

    School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA;

    Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA;

    Air Force Research Laboratory, Sensors Directorate, Wright-Patterson Air Force Base, Dayton, OH, USA;

    Air Force Research Laboratory, Sensors Directorate, Wright-Patterson Air Force Base, Dayton, OH, USA;

    Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA;

    Air Force Research Laboratory, Sensors Directorate, Wright-Patterson Air Force Base, Dayton, OH, USA;

    Department of Chemistry and Chemical Biology, Harvard University, Cambridge, MA, USA;

    School of Electrical and Computer Engineering and Birck Nanotechnology Center, Purdue University, West Lafayette, IN, USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Gallium nitride; Logic gates; Aluminum gallium nitride; Wide band gap semiconductors; Epitaxial growth; HEMTs; MODFETs;

    机译:氮化镓;逻辑门;氮化铝镓;宽带隙半导体;外延生长;HEMT;MODFET;

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