Abstract: A mesh grid for a fluorescent display tube capable of effectively preventing a deformed mesh from being in contact with fluorescent substance without disturbing indications on an anode display unit. The mesh grid is mounted over an anode substrate with adhesive. A mesh of the mesh grid is disposed over the anode display unit including a plurality of anode segments. The mesh is formed in a hexagonal pattern. On the mesh, protruding portions directed to the anode display unit are formed. The protruding portions are disposed at positions opposing the anode display unit but not opposing each of the anode segments. The protruding portions are formed by pressing the mesh toward the anode display unit with each intersection of fine wires in a hexagonal pattern.

Abstract: A fluorescent display device which is capable of eliminating a soldering failure such as a tunnel solder phenomenon is disclosed. The fluorescent display device includes electrode wires each having an external lead portion which has a convex polygonal shape in section to allow a chromium oxide layer to be readily removed by a mechanical method, to thereby effectively carry out the mounting a fluorescent display device on a substrate by soldering.