SEMICONDUCTOR DEVICES

AlGaN/GaN HEMTs with 0.2 μm V-gate recesses for X-band application

Wang Chong, He Yunlong, Zheng Xuefeng, Hao Yue, Ma Xiaohua and Zhang Jincheng

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Abstract: AlGaN/GaN HEMTs with 0.2 μm V-gate recesses were developed. The 0.2 μm recess lengths were shrunk from the 0.6 μm designed gate footprint length after isotropic SiN deposition and anisotropic recessed gate dry etching. The AlGaN/GaN HEMTs with 0.2 μm V-gate recesses on sapphire substrates exhibited a current gain cutoff frequency ft of 35 GHz and a maximum frequency of oscillation fmax of 60 GHz. At 10 GHz frequency and 20 V drain bias, the V-gate recess devices exhibited an output power density of 4.44 W/mm with the associated power added efficiency as high as 49%.

Key words: high electron mobility transistors

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    Received: 20 August 2015 Revised: 30 September 2011 Online: Published: 01 March 2012

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      Wang Chong, He Yunlong, Zheng Xuefeng, Hao Yue, Ma Xiaohua, Zhang Jincheng. AlGaN/GaN HEMTs with 0.2 μm V-gate recesses for X-band application[J]. Journal of Semiconductors, 2012, 33(3): 034003. doi: 10.1088/1674-4926/33/3/034003 Wang C, He Y L, Zheng X F, Hao Y, Ma X H, Zhang J C. AlGaN/GaN HEMTs with 0.2 μm V-gate recesses for X-band application[J]. J. Semicond., 2012, 33(3): 034003. doi: 10.1088/1674-4926/33/3/034003.Export: BibTex EndNote
      Citation:
      Wang Chong, He Yunlong, Zheng Xuefeng, Hao Yue, Ma Xiaohua, Zhang Jincheng. AlGaN/GaN HEMTs with 0.2 μm V-gate recesses for X-band application[J]. Journal of Semiconductors, 2012, 33(3): 034003. doi: 10.1088/1674-4926/33/3/034003

      Wang C, He Y L, Zheng X F, Hao Y, Ma X H, Zhang J C. AlGaN/GaN HEMTs with 0.2 μm V-gate recesses for X-band application[J]. J. Semicond., 2012, 33(3): 034003. doi: 10.1088/1674-4926/33/3/034003.
      Export: BibTex EndNote

      AlGaN/GaN HEMTs with 0.2 μm V-gate recesses for X-band application

      doi: 10.1088/1674-4926/33/3/034003
      Funds:

      The National Natural Science Foundation of China (General Program, Key Program, Major Research Plan)

      • Received Date: 2015-08-20
      • Accepted Date: 2011-08-19
      • Revised Date: 2011-09-30
      • Published Date: 2012-02-20

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