Computational Modeling of field emission tips / Modelamento computacional de ponteiras de emissão de campo

AUTOR(ES)

Marcelo Nogueira Tirolli

DATA DE PUBLICAÇÃO

2007

RESUMO

This work aims to study the electrical behavior of a field emission tip, shaped in the form hemisphere on a post, through computational resources (simulations). We chose the Ansys commercial software that uses the finite element methods in the analyses of the physical phenomena to obtain the electric field in the surface of the tip. After that, a computational program was also developed to perform the calculation of emission current based on Fowler-Nordheim (F-N) field emission theory. To calculate the current, the program uses the results of the electric field simulations gotten in Ansys software. We also show the results of influences that dimensions such as the hemisphere curvature radius, the height of the tip and the distance between anode and cathode exert on the behavior of the electric field, emission current and other physical quantities that involve field emission

ASSUNTO(S)

microeletronica campos eletricos simulação (computadores) electric field simulation (computers) field enhancement factor medidas eletricas electrons field emission tips eletrons - emissão vacuum microelectronics electrical characterization emission current

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