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Sokolovskij, R. (author), Zhang, Jian (author), Zheng, Hongze (author), Li, Wenmao (author), Jiang, Y. (author), Yang, Gaiying (author), Yu, H. (author), Sarro, Pasqualina M (author), Zhang, Kouchi (author)The present work reports on the hydrogen gas detection properties of Pt-AlGaN/GaN high electron mobility transistor (HEMT) sensors with recessed gate structure. Devices with gate recess depths from 5 to 15 nm were fabricated using a precision cyclic etching method, examined with AFM, STEM and EDS, and tested towards H 2 response at high...journal article 2020
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Sokolovskij, R. (author), Zhang, Jian (author), Zheng, Hongze (author), Li, Wenmao (author), Jiang, Yang (author), Yang, Gaiying (author), Yu, Hongyu (author), Sarro, Pasqualina M (author), Zhang, Kouchi (author)The present work reports on the hydrogen gas detection properties of Pt-AlGaN/GaN high electron mobility transistor (HEMT) sensors with recessed gate structure. Devices with gate recess depths from 5 to 15 nm were fabricated using a precision cyclic etching method, examined with AFM, STEM and EDS, and tested towards H2 response at high...journal article 2020
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Santagata, F. (author), Sun, J. (author), Iervolino, E. (author), Yu, H. (author), Wang, F. (author), Zhang, Kouchi (author), Sarro, Pasqualina M (author), Zhang, Guoyi (author)Purpose: The purpose of this paper is to demonstrate a novel 3D system-in-package (SiP) approach. This new packaging approach is based on stacked silicon submount technology. As demonstrators, a smart lighting module and a sensor systems were successfully developed by using the fabrication and assembly process described in this paper. Design...journal article 2018
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Sokolovskij, R. (author), Zhang, Jian (author), Iervolino, E. (author), Zhao, Changhui (author), Santagata, F. (author), Wang, F. (author), Yu, Hongyu (author), Sarro, Pasqualina M (author), Zhang, Kouchi (author)AlGaN/GaN high electron mobility transistor (HEMT)-based sensors with catalytic platinum gate were micro-fabricated on commercially available epitaxial wafers and extensively characterized for ppm level hydrogen sulfide (H<sub>2</sub>S) detection for industrial safety applications. High operating temperature above 150 °C enabled large signal...journal article 2018
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Sokolovskij, R. (author), Iervolino, E. (author), Zhao, Changhui (author), Wang, F. (author), Yu, Hongyu (author), Santagata, F. (author), Sarro, Pasqualina M (author), Zhang, Kouchi (author)This paper reports on the layout optimization of Pt-AlGaN/GaN HEMT-sensors for enhancing hydrogen sensor performance. Sensors with gate width and length ratios W<sub>g</sub>/L<sub>g</sub> from 0.25 to 10 were designed, fabricated and tested for the detection of hydrogen gas at 200 °C. Sensitivity, sensing current variation and transient...conference paper 2017