HEATER, ELECTRON GUN AND DISPLAY DEVICE, AS WELL AS THEIR MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To realize a further characteristics improvement of a heater. SOLUTION: As a constitution of a heater 14 having a metal wire forming a heater coil part 16 wherein a surface of a metal wire 15 including a heater coil part 16 is coated with an insulation film 17, the insulation film 17 to coat the surface of the metal wire 15 is constituted by alumina with content of zirconia less than a predetermined value.