FEATURES OF DIAMOND DEPOSITION ON MODIFIED SILICA GLASS SUBSTRATES

The structural characteristics of diamond films grown by hot-filament CVD on silica glass plates, preliminarily modified with different surf ace treatment, have been investigated by RHEED, SEM, and Raman spectro scopy. The modifications of the silica glass surfaces were obtained in three different ways: (]) high-power sonication in diamond dust suspe nsion; (2) e-beam irradiation for production of amorphous carbon surfa ce layers, (3) exposition to glow-discharge for production of diamond- like surface layers. The analyses results are here discussed with refe rence to the structures produced at the substrate surface. (C) 1997 El sevier Science S.A.