Patent ID: 7285901

Claim:
A display device comprising: a face substrate having anodes and phosphors formed on an inner surface thereof; a plurality of cathode lines which extend in one direction and are arranged in parallel in another direction which crosses the one direction; a plurality of electron sources which are arranged on the cathode lines in an electrically conductive manner; control electrodes which face the cathode lines in a display region and have electron passing apertures for allowing electrons from the electron sources to pass through the electron passing apertures to the face substrate side; a back substrate having the control electrodes and the cathode lines formed on an inner surface thereof and which faces the face substrate in an opposed manner with a given distance therebetween; a support body which is interposed between the face substrate and the back substrate in a state such that the support body surrounds a display region and holds said given distance; and a sealing material which hermetically seals end faces of the support body and the face substrate, and the back substrate respectively, wherein a connecting portion of the cathode line with the electron source has a composition which includes a conductor and an insulator, and the composition is determined such that the occupancy rate of the conductor is set to be equal to or more than the occupancy rate of the insulator.