Home > Publications database > Electrical and structural characterization of AlGaN/GaN field-effect transistors with recessed gate > print |
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024 | 7 | _ | |2 DOI |a 10.1016/j.vacuum.2011.07.016 |
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100 | 1 | _ | |0 P:(DE-Juel1)128613 |a Mikulics, M. |b 0 |u FZJ |
245 | _ | _ | |a Electrical and structural characterization of AlGaN/GaN field-effect transistors with recessed gate |
260 | _ | _ | |a Amsterdam [u.a.] |b Elsevier Science |c 2012 |
300 | _ | _ | |a 754 - 756 |
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440 | _ | 0 | |0 5896 |a Vacuum |v 86 |x 0042-207X |y 6 |
500 | _ | _ | |3 POF3_Assignment on 2016-02-29 |
500 | _ | _ | |a The work reported here was supported by the Slovak Scientific Grant Agency VEGA (Contract Nos. 1/0866/11 and 2/0098/09) and the Centre of Excellence CENAMOST (VVCE-0049-07). |
520 | _ | _ | |a Performance of AlGaN/GaN heterostructure field-effect transistors (HFETs) with recessed gate was investigated and compared with non-recessed counterparts. Optimal dry etch conditions by plasma assisted Ar sputtering were found for similar to 6 nm gate recess of a 20 nm thick AlGaN barrier layer. A decrease of the residual strain after the gate recessing (from -0.9 GPa to -0.68 GPa) was evaluated from the photoluminescence measurement. The saturation drain current at the gate voltage V-G = 1 V decreased from 1.05 A/mm to 0.85 A/mm after the recessing. The gate voltage for a maximal transconductance (240-250 mS/mm) has shifted from -3 V for non-recessed HFETs to -0.2 V for recessed counterparts. Similarly, the threshold voltage increased after the gate recessing. A decrease of the sheet charge density from 1 x 10(13) cm(-2) to 4 x 10(12) cm(-2) at V-G = 0 V has been evaluated from the capacitance measurements. The RF measurements yielded a slight increase of the cut-off frequencies after the gate recessing. All these indicate that the gate recessing is a useful tool to optimize the AlGaN/GaN HFET performance for high-frequency applications as well as for the preparation of normally-off devices. (C) 2011 Elsevier Ltd. All rights reserved. |
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653 | 2 | 0 | |2 Author |a Gallium nitride |
653 | 2 | 0 | |2 Author |a Plasma assisted etching |
653 | 2 | 0 | |2 Author |a Electrical properties |
653 | 2 | 0 | |2 Author |a Photoluminescence |
653 | 2 | 0 | |2 Author |a Transistor |
700 | 1 | _ | |0 P:(DE-Juel1)VDB61237 |a Fox, A. |b 1 |u FZJ |
700 | 1 | _ | |0 P:(DE-HGF)0 |a Marso, M. |b 2 |
700 | 1 | _ | |0 P:(DE-Juel1)125588 |a Grützmacher, D. |b 3 |u FZJ |
700 | 1 | _ | |0 P:(DE-HGF)0 |a Donoval, D. |b 4 |
700 | 1 | _ | |0 P:(DE-HGF)0 |a Kordos, P. |b 5 |
773 | _ | _ | |0 PERI:(DE-600)1479044-0 |a 10.1016/j.vacuum.2011.07.016 |g Vol. 86, p. 754 - 756 |n 6 |p 754 - 756 |q 86<754 - 756 |t Vacuum |v 86 |x 0042-207X |y 2012 |
856 | 7 | _ | |u http://dx.doi.org/10.1016/j.vacuum.2011.07.016 |
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