HOT-FILAMENT SCALING-UP FOR CVD DIAMOND BURR MANUFACTURING

We present the scale-up of a hot filament system for manufacturing CVD diamond burr. In our system, the diamond film growth rate reached aro und 15 mu m h(-1) on 1 mm diameter molybdenum rods. The burrs were mad e of 250 mu m thick free-standing diamond him. We optimized the gas co nsumption, power supply, gas flow rate and the number of hot filament reactors for the industrialization of dentist burr. We also discuss th e production capabilities of each reactor. Scale-up and price prospect ive together with exhaustive testing show that CVD diamond burr may ha ve a favorable cost-effectiveness.