Ultrahigh-Speed 0.5 V Supply Voltage In0.7 Ga0.3As Quantum-Well Transistors on Silicon Substrate |
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Authors: | Datta S Dewey G Fastenau JM Hudait MK Loubychev D Liu WK Radosavljevic M Rachmady W Chau R |
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Affiliation: | Intel Corp., Hillsboro; |
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Abstract: | The direct epitaxial growth of ultrahigh-mobility InGaAs/InAlAs quantum-well (QW) device layers onto silicon substrates using metamorphic buffer layers is demonstrated for the first time. In this letter, 80 nm physical gate length depletion-mode InGaAs QW transistors with saturated transconductance gm of 930 muS / mum and fT of 260 GHz at VDS = 0.5 V are achieved on 3.2 mum thick buffers. We expect that compound semiconductor-based advanced QW transistors could become available in the future as very high-speed and ultralow-power device technology for heterogeneous integration with the mainstream silicon CMOS. |
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