Abstract: A write head for a fluorescent printer which is capable of being prevented from being adversely affected by charging of electrons and opposite control electrodes and capable of forming an electrode pattern with high precision. Anodes 7 are arranged on a glass substrate 1 in a main scanning direction to constitute anode arrays in juxtaposition to each other, so that the anode arrays are arranged in two rows extending in a sub-scanning direction. The two anode arrays are so provided that the anodes 7 corresponding to each other in both anode arrays are arranged in a zigzag arrangement. Each pair of adjacent anodes 7 which correspond to each other in both anode arrays and are arranged so as to alternate in the zigzag arrangement include anode conductors 2 connected to each other through a wiring conductor 3a. The respective anode arrays are surrounded by groups of control electrodes 4a and 4b electrically independent from each other, respectively.

Abstract: A key board switch capable of permitting all key switches to exhibit an N-key rollover function at a low cost while preventing an increase in thickness of the key board switch. For this purpose, a thin film diode is used for a contact of the key switch. The thin film diode may form at least one of the contacts of each of the key switches. Alternatively, the thin film diode may be connected in series to at least one of the contacts of each of the key switches. Alternatively, the thin film diode may be connected in series to at least one of the contacts of each of the key switches.