Effect of diamond growth parameters on field emission current

The field emission characteristics of diamond films grown by hot filament chemical vapor deposition (HFCVD) with different deposition parameters are studied. Electric fields to initiate emission, measured at J=0.01 mAcm/sup -2/, are in the range of 0.1/spl sim/0.4 MV/cm depending upon growth conditions. Diamond films with low diamond/graphite peak (sp/sup 3//sp/sup 2/ ratio), wider diamond peak at 1332 cm/sup -1/ and low resistivity show emission at low fields.