SEMICONDUCTOR DEVICES

Effect of underlap and gate length on device performance of an AlInN/GaN underlap MOSFET

Hemant Pardeshi, Sudhansu Kumar Pati, Godwin Raj, N Mohankumar and Chandan Kumar Sarkar

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Abstract: We investigate the performance of an 18 nm gate length AlInN/GaN heterostructure underlap double gate MOSFET, using 2D Sentaurus TCAD simulation. The device uses lattice-matched wideband Al0.83In0.17N and narrowband GaN layers, along with high-k Al2O3 as the gate dielectric. The device has an ultrathin body and is designed according to the ITRS specifications. The simulation is done using the hydrodynamic model and interface traps are also considered. Due to the large two-dimensional electron gas (2DEG) density and high velocity, the maximal drain current density achieved is very high. Extensive device simulation of the major device performance metrics such as drain induced barrier lowering (DIBL), subthreshold slope (SS), delay, threshold voltage (Vt), Ion/Ioff ratio and energy delay product have been done for a wide range of gate and underlap lengths. Encouraging results for delay, Ion, DIBL and energy delay product are obtained. The results indicate that there is a need to optimize the Ioff and SS values for specific logic design. The proposed AlInN/GaN heterostructure underlap DG MOSFET shows excellent promise as one of the candidates to substitute currently used MOSFETs for future high speed applications.

Key words: MOS-HEMTunderlapheterostructureultrathin bodyinterface trapseffective mass

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    Received: 03 December 2014 Revised: 16 July 2012 Online: Published: 01 December 2012

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      Hemant Pardeshi, Sudhansu Kumar Pati, Godwin Raj, N Mohankumar, Chandan Kumar Sarkar. Effect of underlap and gate length on device performance of an AlInN/GaN underlap MOSFET[J]. Journal of Semiconductors, 2012, 33(12): 124001. doi: 10.1088/1674-4926/33/12/124001 H Pardeshi, S K Pati, G Raj, N Mohankumar, C K Sarkar. Effect of underlap and gate length on device performance of an AlInN/GaN underlap MOSFET[J]. J. Semicond., 2012, 33(12): 124001. doi:  10.1088/1674-4926/33/12/124001.Export: BibTex EndNote
      Citation:
      Hemant Pardeshi, Sudhansu Kumar Pati, Godwin Raj, N Mohankumar, Chandan Kumar Sarkar. Effect of underlap and gate length on device performance of an AlInN/GaN underlap MOSFET[J]. Journal of Semiconductors, 2012, 33(12): 124001. doi: 10.1088/1674-4926/33/12/124001

      H Pardeshi, S K Pati, G Raj, N Mohankumar, C K Sarkar. Effect of underlap and gate length on device performance of an AlInN/GaN underlap MOSFET[J]. J. Semicond., 2012, 33(12): 124001. doi:  10.1088/1674-4926/33/12/124001.
      Export: BibTex EndNote

      Effect of underlap and gate length on device performance of an AlInN/GaN underlap MOSFET

      doi: 10.1088/1674-4926/33/12/124001
      • Received Date: 2014-12-03
      • Accepted Date: 2012-06-22
      • Revised Date: 2012-07-16
      • Published Date: 2012-11-13

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