Toward smooth MWPECVD diamond films: Exploring the limits of the hydrogen percentage in Ar/H2/CH4 gas mixture.

Abstract

In Ar-rich Ar–H2–CH4 gas mixture the presence of H2 is found to be beneficial to the plasma stability. On the other hand, too high H2 percentages lead to materials showing a high surface roughness. In the present work, diamond films were grown on p-type Si (100) substrates screening different quantities of H2. The plasma phase and plasma–substrate interface were investigated by in-situ optical emission spectroscopy and pyrometric interferometry to determine the behavior of emitting species and the deposition rates, respectively. The obtained films were characterized by Raman micro-spectroscopy, AFM and SEM techniques. For H2 percentages between 6.3 and 10%, the structure and morphology are characteristic of nanocrystalline films, affording low roughness values when a buffer layer was grown between the diamond coating and the treated silicon surface.


Autore Pugliese

Tutti gli autori

  • G. Cicala , D. Monéger , D. Cornacchia , P. Pesce , V. MAgaletti , G. Perna , V. Capozzi , M. Tamborra

Titolo volume/Rivista

SURFACE & COATINGS TECHNOLOGY


Anno di pubblicazione

2012

ISSN

0257-8972

ISBN

Non Disponibile


Numero di citazioni Wos

Nessuna citazione

Ultimo Aggiornamento Citazioni

Non Disponibile


Numero di citazioni Scopus

7

Ultimo Aggiornamento Citazioni

Non Disponibile


Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile