Low voltage electron beam display apparatus having brightness increased by reducing an oxide inevitably formed on a surface of an oxisulfide phosphor on manufacture

A method of manufacturing a low voltage electron beam excitation phosphor display apparatus (10) comprising a vacuum chamber (1, 2, and 3), an anode (6) having a principal surface and enclosed in said vacuum chamber, a phosphor film (7) formed on said principal surface, and a cathode (9) enclosed in said vacuum chamber opposite to said phosphor film for emitting a low voltage electron beam towards said anode to excite said phosphor film to emit light, said method including an anode-forming step of forming said anode on an insulating substrate (1) constituting said vacuum chamber, wherein said method comprises:

• a preparing step of preparing a phosphor which consists essentially of an oxisulfide and an oxide inevitably formed on a surface of said phosphor on preparing said phosphor, said oxisulfide being represented by Ln.sub.2 O.sub.2 S:R, where Ln is at least one selected from a group consisting of Gd, La, Y, and Lu and where R is a rare-earth element;
• a removing step of removing said oxide from said phosphor to produce an oxide-removed phosphor;
• a coating step of coating, on the principal surface of said anode, a paste comprising a mixture of said oxide-removed phosphor, a conductive material, and an autolytic type binder;
• a binder-heating step of heating the binder of said paste in a nonoxidizing atmosphere to form, on the principal surface of said anode, said phosphor film comprising said oxide-removed phosphor and said conductive material;
• and
• an enclosing step of enclosing said anode and said cathode in said vacuum chamber to obtain a manufactured low voltage electron beam excitation phosphor display apparatus.