The sp

1

-hybridized nano-crystalline white carbon films were fabricated by using microwave plasma chemical vapor deposition system filling mixture gas of H

2

/CH

4

.The titanium coated glass was used to be substrate.The structure characteristics of deposited films were analyzed by X-ray diffraction

Auger electron en-ergy spectroscopy

and scanning electron microscope.The XRD spectrum exhibits the typical signature of white carbon material.The presence of the peak at 2θ=21.68°(

d

=0.4107 nm)

which corresponds to the(110) diffraction line of β modifications

is taken as one evidence for the existence of white carbon film.The lattice of white carbon material has a layered structure.Each layer is formed by short carbon chains

which result from the interconnecting sp-hybridized carbon atoms.More dangling bonds will exist in the material because of its such special crystal structure

and will lead to form new valence states

which was confirmed by using Auger electron spectroscopy.The characteristics of field electron emission of the film with area of 0.8 cm

2

were measured in a base pressure of 10

-5

Pa by using diode structure method.The deposited nano-crystalline white carbon films were used to be cathode

and ITO coated glass to be anode.The turn-on field of 2.5 V/μm and the current density of 200 μA/cm

2

at electric field of 5 V/μm were obtained.The field electron emission from the white carbon film was so easy to be detected and had low turn-on field

probably due to the existence of the dangling bond states of the films.The growth mechanism of the white carbon films are also discussed.