Effect of high strain on noise characteristics in InAIAs/InGaAs pseudomorphic HEMT

Abstract
We have investigated the RF noise characteristics of an InGaAs HEMT having a highly strained channel. The characteristics were compared with those of a device having a lattice-matched channel. The indium mole fraction of the strained channel was 80%. While the DC and RF performances were significantly improved with the strained channel, the RF noise characteristics showed that the device with the strained channel had higher noise and a different dependence on bias current.

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