METAL/FERRITE LAMINATED MAGNET

摘要

PROBLEM TO BE SOLVED: To provide a metal/ferrite laminated magnet having openings which are accurately aligned with a phosphor under all operating conditions by substantially aligning the openings of a first and second ferrite sheet with those of a second metallic plate. SOLUTION: A metallic plate 105 is cut to measure and openings 125 are formed through the plate 105 by etching. Then a first green ferrite sheet 115 is fitted to one surface of the etched metallic plate 105 and openings 125 are formed through the sheet 115 by punching by using the etched holes of the metallic plate 105 as guides. Openings 125 are also formed through a second metallic plate 110 and a second green ferrite sheet 120 in the same ways. Then a sandwich-like magnet 100 is formed by bringing the surfaces of the first and second green ferrite sheets 115 and 120 into contact with each other, coupling the sheets 115 and 120 with each other so that the opening of the sheets 115 and 120 may be aligned with each other, and sintering the laminated body. A vertically arranged magnetic field is given to the magnet 100.