07/11/03 19:17:55 4iNQB1Ah
SUMMARY OF THE INVENTION
[0013] It is, therefore, the object of the present invention to provide an electron-emitting device that performs well for electron emission
by selecting optimal conditions for the carbon film in terms of its distribution,
its properties and the conditions under which it is treated before producing the device as a finished product.
[0014] According to the invention, the above object is achieved by providing an electron-emitting device comprising a carbon film which is made of graphite
and formed inside the gap of the electron-emitting region as shown in FIGS.
1A and 1B of the accompanying drawings.
While the device of FIGS. 1A and 1B does not practically carry any carbon film outside the gap, a carbon film may also be formed outside the gap.
Although graphite is a crystalline substance containing only carbon atoms, its crystallinity may be accompanied, to certain extent, by "distortions" of various types.
For the purpose of the invention, however, a carbon film of highly crystalline graphite is formed in the inside of the gap of the electron-emitting region.