Journal
APPLIED PHYSICS LETTERS
Volume 91, Issue 23, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2820381
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Nonalloyed Ohmic contacts on Ga-face n(+)-GaN/AlGaN/GaN high electron mobility transistor (HEMT) structures typically have significant contact resistance to the two-dimensional electron gas (2DEG) due to the AlGaN barrier. By growing the HEMT structure inverted on the N-face, electrons from the contacts were able to access the 2DEG without going through an AlGaN layer. A low contact resistance of 0.16 Omega mm and specific contact resistivity of 5.5x10(-7) Omega cm(2) were achieved without contact annealing on the inverted HEMT structure. (c) 2007 American Institute of Physics.
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