DIAMOND COATED TUNGSTEN WIRE FIELD EMITTERS: DIAMOND THICKNESS EFFECT

Viliam Malcher --- Ján Janík

   Graphitic tungsten wires were coated with diamond in a double bias-assisted hot filament CVD reactor. A comparison of the field emission characteristics before and after coating showed significant shifts of the emission current depending on the thickness of the coatings. A model of emission through the diamond layer is proposed. The influence of different growth conditions on the film quality has been investigated by micro-Raman measurements and optical microscopy.

Keywords: field emission of diamond films, micro-Raman spectra, field cold cathodes, double bias-assisted hot filament CVD method

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