J. Semicond. > 2009, Volume 30 > Issue 5 > 054001

SEMICONDUCTOR DEVICES

Annealing before gate metal deposition related noise performance in AlGaN/GaN HEMTs

Pang Lei, Pu Yan, Liu Xinyu, Wang Liang, Li Chengzhan, Liu Jian, Zheng Yingkui and Wei Ke

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DOI: 10.1088/1674-4926/30/5/054001

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Abstract: For a further improvement of the noise performance in AlGaN/GaN HEMTs, reducing the relatively high gate leakage current is a key issue. In this paper, an experiment was carried out to demonstrate that one method during the device fabrication process can lower the noise. Two samples were treated differently after gate recess etching: one sample was annealed before metal deposition and the other sample was left as it is. From a comparison of their Ig–Vg characteristics, a conclusion could be drawn that the annealing can effectively reduce the gate leakage current. The etching plasma-induced damage removal or reduction after annealing is considered to be the main factor responsible for it. Evidence is given to prove that annealing can increase the Schottky barrier height. A noise model was used to verify that the annealing of the gate recess before the metal deposition is really effective to improve the noise performance of AlGaN/GaN HEMTs.

Key words: GaN HEMT annealing before metal deposition gate leakage current noise performance

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    Received: 18 August 2015 Revised: 08 January 2009 Online: Published: 01 May 2009

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      Pang Lei, Pu Yan, Liu Xinyu, Wang Liang, Li Chengzhan, Liu Jian, Zheng Yingkui, Wei Ke. Annealing before gate metal deposition related noise performance in AlGaN/GaN HEMTs[J]. Journal of Semiconductors, 2009, 30(5): 054001. doi: 10.1088/1674-4926/30/5/054001 ****Pang L, Pu Y, Liu X Y, Wang L, Li C Z, Liu J, Zheng Y K, Wei K. Annealing before gate metal deposition related noise performance in AlGaN/GaN HEMTs[J]. J. Semicond., 2009, 30(5): 054001. doi:  10.1088/1674-4926/30/5/054001.
      Citation:
      Pang Lei, Pu Yan, Liu Xinyu, Wang Liang, Li Chengzhan, Liu Jian, Zheng Yingkui, Wei Ke. Annealing before gate metal deposition related noise performance in AlGaN/GaN HEMTs[J]. Journal of Semiconductors, 2009, 30(5): 054001. doi: 10.1088/1674-4926/30/5/054001 ****
      Pang L, Pu Y, Liu X Y, Wang L, Li C Z, Liu J, Zheng Y K, Wei K. Annealing before gate metal deposition related noise performance in AlGaN/GaN HEMTs[J]. J. Semicond., 2009, 30(5): 054001. doi:  10.1088/1674-4926/30/5/054001.

      Annealing before gate metal deposition related noise performance in AlGaN/GaN HEMTs

      DOI: 10.1088/1674-4926/30/5/054001
      • Received Date: 2015-08-18
      • Accepted Date: 2008-11-23
      • Revised Date: 2009-01-08
      • Published Date: 2009-04-20

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