Patent ID: 7837529

Claim:
A manufacturing method of an electron-emitting device comprising the steps of: preparing a substrate having a first electrode and a second electrode, and a conductive film for connecting the first electrode and the second electrode; and forming a gap on the conductive film by applying a voltage between the first electrode and the second electrode; wherein a planar shape of the conductive film has a V-shape portion between the first electrode and the second electrode, and wherein assuming that an inside apex of a bend portion of the V-shape portion is a point B, an outside apex of the bend portion is a point E, an intersecting point of a side of the conductive film including the point E and the first electrode is a point C, an intersecting point of the side of the conductive film including the point E and the second electrode is a point A, a distance between a line segment AC connecting the point A and the point C and the point B is L, and a width of the conductive film at a connection portion with one electrode of the first and second electrodes, which is at a higher potential than the other one of the electrodes in the step of forming the gap on the conductive film is W, |L/W|≦0.8 is established.