Accession Number : AD1040165


Title :   Flexible GaN for High Performance, Strainable Radio Frequency Devices (Postprint)


Descriptive Note : Journal Article - Open Access


Corporate Author : Wyle Laboratories Beavercreek United States


Personal Author(s) : Glavin,Nicholas R ; Chabak,Kelson D ; Heller,Eric R ; Moore,Elizabeth A ; Prusnick,Timothy A ; Maruyama,Benji ; Walker,Dennis Jr E ; Dorsey,Donald L ; Paduano,Qing ; Snure,Michael R


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1040165.pdf


Report Date : 02 Nov 2017


Pagination or Media Count : 10


Abstract : Flexible gallium nitride (GaN) thin films can enable future strainable and conformal devices for transmission of radio-frequency (RF) signals over large distances for more efficient wireless communication. For the first time, strainable high-frequency RF GaN devices are demonstrated, whose exceptional performance is enabled by epitaxial growth on 2D boron nitride for chemical-free transfer to a soft, flexible substrate. The AlGaN/GaN heterostructures transferred to flexible substrates are uniaxially strained up to 0.85% and reveal near state-of-the-art values for electrical performance, with electron mobility exceeding 2000 sq cm V(1) s(1) and sheet carrier density above 1.07 10 expn 13 cm(2). The influence of strain on the RF performance of flexible GaN high-electron-mobility transistor (HEMT) devices is evaluated, demonstrating cutoff frequencies and maximum oscillation frequencies greater than 42 and 74 GHz, respectively, at up to 0.43% strain, representing a significant advancement toward conformal, highly integrated electronic materials for RF applications.


Descriptors :   FLEXIBLE ELECTRONICS , radio frequency devices , ceramic materials , high electron mobility transistors , frequency bands , radar , transport properties , compound semiconductors , gallium nitrides , mobility


Distribution Statement : APPROVED FOR PUBLIC RELEASE