Filmes finos de WN e ALN e suas aplicações na fabricação de transitores mesfet

AUTOR(ES)
DATA DE PUBLICAÇÃO

2000

RESUMO

Tungsten Nitride (WN) and Aluminum Nitride (AlN) thin films were deposited by DC sputtering in Nitrogen ambi~nt and characterized in this work. Gallium Arsenide Schottky diodes were used in the characterization of WN films. The diodes were subject to thermal treatments to study the thermal stability of the contacts, as in the fabrication process of MESFET transistors. The diodes characterizations were based in I-V measurements to obtain the ideality factor(n) and the Schottky barrier height(?b). The thermally stable devices show n=1.3 and { ?b =O.55eV respectively. The diodes were also submitted to a plasma passivation processo The AlN thin films were characterized using MIS capacitors and the dielectric constant and effective charge density obtained were 8.7 and O.9x1011 cm-2 respectively. The AlN films were used satisfactory as a cap layer to íon implantation and annealing, which is a process step of MESFET transístors

ASSUNTO(S)

schottky nitretos transistores de efeito de campo de semicondutor de metal diodos de barreira de filmes finos

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