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CMOS-compatible GaN-on-Si HEMTs with cut-off frequency of 210 GHz and high Johnson’s figure-of-merit of 8.8 THz V
- Source :
- Applied Physics Express. 13:026503
- Publication Year :
- 2020
- Publisher :
- IOP Publishing, 2020.
-
Abstract
- GaN-on-Si high electron mobility transistors (HEMTs) with 80 nm gate length fabricated using Si CMOS-compatible Ta/Al ohmic and Ti/Al gate contacts are reported in this work. The device with a source-drain distance (Lsd) of 750 nm exhibited a high cut-off frequency (fT) of 210 GHz. An off-state breakdown voltage (BV) of 46 V and a high Johnson's figure-of-merit (= fT × BV) of 8.8 THzV have been achieved in a device with Lsd of 1.5 μm. These results show the great potential of GaN-on-Si HEMTs to realize high performance-to-cost ratio mm-wave devices through mass production using current Si foundries.
- Subjects :
- 010302 applied physics
Materials science
business.industry
Terahertz radiation
Transistor
General Engineering
General Physics and Astronomy
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Cutoff frequency
law.invention
Johnson's figure of merit
law
0103 physical sciences
Optoelectronics
Breakdown voltage
0210 nano-technology
business
High electron
Ohmic contact
Cmos compatible
Subjects
Details
- ISSN :
- 18820786 and 18820778
- Volume :
- 13
- Database :
- OpenAIRE
- Journal :
- Applied Physics Express
- Accession number :
- edsair.doi...........e442f8072c8d32416534081d40481c12