Diamond Deposition onto Wires and Microdrills Using VFCVD

Deposition of uniform and adherent diamond onto 3-D substrates is highly challenging particularly when using a conventional horizontal hot filament chemical vapour deposition (HFCVD). In this chapter the deposition of diamond onto wires and microdrills using a new VFCVD system has been described. In this arrangement the wire and drills were held concentrically within the core of the filament where maximum plasma intensity is prevalent. The structure and morphology studies have shown that uniform adherent diamond films have beed deposited using VFCVD. These films were tested for performance and life and the arrangements used and results obtained have been presented.