Provided is an electron-emitting device with high electron emission efficiency
and with stable electron emission characteristics over a long period. The electron-emitting
device has a substrate, first and second carbon films laid with a first gap in
between on the surface of the substrate, and first and second electrodes electrically
connected to the first carbon film and to the second carbon film, respectively.
In the electron-emitting device, a narrowest gap portion between the first carbon
film and the second carbon film in the first gap is located above a surface of
the substrate and the substrate has a depressed portion, at least, in the first gap.
