Enhancement Mode Ga2O3 Field Effect Transistor with Local Thinning Channel Layer

Autor: Lei Ge, Qiu Chen, Shuai Wang, Wenxiang Mu, Qian Xin, Zhitai Jia, Mingsheng Xu, Xutang Tao, Aimin Song
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Crystals, Vol 12, Iss 7, p 897 (2022)
Druh dokumentu: article
ISSN: 2073-4352
DOI: 10.3390/cryst12070897
Popis: β−Ga2O3 field−effect transistors (FETs) were fabricated with and without local thinning to change the threshold voltage. A 220 nm Ga2O3 layer was mechanically exfoliated from a Cr−doped gallium oxide single crystal. Approximately 45 nm Ga2O3 was etched by inductively coupled plasma to form the local thinning. The threshold voltage of the device with etched local thinning increased from −3 V to +7 V compared to the unetched device. The effect of the local thinning was analyzed by device simulation, confirming that the local thinning structure is an effective method to enable enhancement−mode Ga2O3 FETs.
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