Published March 26, 2025 | Version v1
Journal article

ScAlN/GaN-on-Si (111) HEMTs for RF applications

Description

Abstract ScAlN is a promising barrier material for next generation RF high electron mobility transistors, outperforming AlGaN thanks a higher 2-dimensional electron gas (2DEG) density and a thinner barrier with a lower lattice mismatch with GaN. A sub-10 nm barrier ScAlN/GaN heterostructure, grown by ammonia-source molecular beam epitaxy on Si(111), is processed into transistors. The 2DEG density is 1.6x10 13 cm -2 with a mobility μ ∼ 621 cm 2 /V.s. A 75-nm gate length transistor exhibits a drain current density of 1.35 A/mm, a transconductance of ~284 mS/mm, a current gain cutoff frequency of 82 GHz and a maximum oscillation frequency of 112 GHz.

Abstract

International audience

Additional details

Identifiers

URL
https://hal.science/hal-05008937
URN
urn:oai:HAL:hal-05008937v1

Origin repository

Origin repository
UNICA