Zobrazeno 1 - 10
of 89
pro vyhledávání: '"G. Constantinidis"'
Autor:
Maria Kayambaki, A. Kostopoulos, Matthew Zervos, Alexandros Georgakilas, N. Flytzanis, G. Constantinidis, Spiros Mikroulis
Publikováno v:
physica status solidi (a). 188:259-262
Al x Ga 1-x N/GaN,/Al y Ga 1-y N./GaN double heterojunction field effect transistors with bottom Al y Ga 1-y N barrier widths between 100 and 2000 A and Al contents of y = 0.15-0.3 were grown by radio-frequency molecular beam epitaxy on both n + and
Autor:
Pierre Blondy, G. Constantinidis, Romolo Marcelli, D. Dascalu, Dan Neculoiu, Giancarlo Bartolucci, Sergiu Iordanescu, F. Giaccomozzi, George Deligeorgis, Dan Vasilache, M. Lagadas, I. Petrini, Alexandru Muller, C. Buiculescu
Publikováno v:
Journal of Micromechanics and Microengineering. 11:301-305
This paper presents the fabrication processes for micromachined millimetre-wave devices, on two different types of semiconductor substrates. The first process uses micromachining on high-resistivity oriented silicon. A three-layer dielectric membrane
Autor:
Konstantin Vassilevski, Irina P. Nikitina, Konstantinos Zekentes, Katerina Tsagaraki, G. Constantinidis
Publikováno v:
Materials Science and Engineering: B. 80:370-373
Ohmic contacts to the top p-type layers of 4H-SiC p + –n–n + epitaxial structures having an acceptor concentration lower than 1×10 19 cm −3 were fabricated by the rapid thermal anneal of multilayer Al/Ti/Pt/Ni metal composition. The rapid ther
Publikováno v:
Materials Science and Engineering: B. 80:257-261
The planar doped barrier diodes are majority carrier devices with technologically controlled barrier height. This paper reviews the main current conducting mechanisms. The limits of the I–V characteristics are described. The design of the device is
Autor:
V.Y. Davydov, G. Constantinidis, Jan Kuzmik, M. Calamiotou, M. Androulidaki, A. Cornet, M. Pavelescu, K. Amimer, Francesca Peiró, Jordi Arbiol, Spiros Mikroulis, Katerina Tsagaraki, Alexandros Georgakilas
Publikováno v:
ResearcherID
The material properties of GaN thin films grown by radio frequency (RF) nitrogen plasma source molecular beam epitaxy (MBE) on (0001) Al2O3 substrates have been correlated to the V/III flux ratio during GaN growth and to the type and thickness of the
Autor:
M Adroulidaki, Elias Aperathitis, Katerina Tsagaraki, E Makarona, N. T. Pelekanos, Alexandros Georgakilas, Maria Kayambaki, G. Constantinidis
Publikováno v:
Materials Science in Semiconductor Processing. 3:511-515
The growth and material properties of GaN heteroepitaxial layers on vicinal (1 0 0) and exact (1 1 1)B substrates have been investigated, using molecular beam epitaxy (MBE) with N2 RF-plasma source. We examined the approach to grow GaN directly on th
Publikováno v:
Solid-State Electronics. 44:1173-1177
Low capacitance (≈1.7 pF at zero bias) 4H-SiC p + – n – n + diodes with moderately doped base region (∼10 17 cm −3 ) were fabricated. The diodes had a differential on-resistance less than 3.5 Ω at current density j >9 kA/cm 2 . The corresp
Influence of MBE Growth Temperature on the Properties of Cubic GaN Grown Directly on GaAs Substrates
Autor:
N. T. Pelekanos, K. Amimer, Katerina Tsagaraki, Maria Androulidaki, M. Calamiotou, Alexandros Georgakilas, Béla Pécz, Zs Czigany, G. Constantinidis
Publikováno v:
physica status solidi (a). 176:525-528
Publikováno v:
Materials Science and Engineering: B. :406-410
Despite its structural shortcomings (stacking faults, twins and threading dislocations), 3C-SiC heteroepitaxially grown on Si still has potential for high temperature sensor applications for which stable electrical contacts are of extreme importance.