To reliably perform the formation of a grid and wiring connection between the grid and a wiring conductor on a base board without causing connection failure.
A grid wiring pattern 5 of a prescribed pattern shape is formed on an anode base board 2, and an insulating layer 7 having a through hole 6b is formed on the anode base board 2 so that the grid wiring pattern 5 faces to a wiring place. The through hole 6b is filled with a conductive material 28, and a frame-shaped grid connecting rib 27 is printed and formed on the insulating layer 7 so as to surround the conductive material 28 on the through hole 6b. The grid connecting rib 27 is integrally connected to a rib to form a display pattern through a simultaneously printed-formed deriving rib 16. Conductive paste is integrally printed and formed on top upper surfaces 16a and 27a of the respective ribs 16 and 27 and in a frame 27b of the grid connecting rib 27. Therefore, the formation of a grid 31 and electric connection between the grid 31 and a grid wiring conductor 29 are performed at a time.
SUZUKI TOSHINORI
KATO MASAHIRO
MUTO SHIGEO
TORIGOE YUICHI
