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- W4285305004 abstract "In this article, we report on the electrical performance of AlGaN/GaN high-electron mobility transistors (HEMTs) fabricated using gold (Au)-free process, after being transferred onto flexible Kapton tape. The transfer process followed in this work can be easily scaled-up to wafer level and involves a relatively simple process of epoxy bonding of the thin device layer onto the Kapton substrate. Electrical characteristics of the flexible HEMT indicate 5%–10% higher ON-current when bent with a radius of curvature of 2.1 cm (at low drain bias voltages), while the OFF-state performance remains unaffected. Initially, 2-DEG properties such as field-effect mobility and carrier concentration have been extracted. While FATFET measurements indicate negligible change in field-effect mobility, <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${C}$ </tex-math></inline-formula> – <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>${V}$ </tex-math></inline-formula> measurements indicate <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$sim 10$ </tex-math></inline-formula> % reduction in 2-DEG concentration after transfer. The comparison of the electrical characteristics of Au-free HEMTs indicates <inline-formula xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex-math notation=LaTeX>$sim 50$ </tex-math></inline-formula> % reduction in the ON-current of the transferred devices. This is attributed to heating of the transistor channel caused due to low thermal conductivity of the polymer Kapton tape. Electrical characteristics of the flexible HEMT carried out under drain pulsing further support the above observation. This work is among one of the few reports on Au-free AlGaN/GaN HEMT operation on flexible Kapton tape." @default.
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- W4285305004 date "2022-08-01" @default.
- W4285305004 modified "2023-09-27" @default.
- W4285305004 title "Au-Free AlGaN/GaN HEMT on Flexible Kapton Substrate" @default.
- W4285305004 doi "https://doi.org/10.1109/ted.2022.3186267" @default.
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