Display device

A display device comprising:

• a face substrate which forms anodes and phosphors 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 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 which forms the control electrodes and the cathode lines on an inner surface thereof and 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 that the support body surrounds the display region and holds the 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 an occupancy rate of the conductor is set equal to or more than an occupancy rate of the insulator.