| 摘要 |
PROBLEM TO BE SOLVED: To provide a double tape type aperture grille that does not bring about a drastic lowering of tension applied on the tape even by blackening treatment. SOLUTION: In the aperture grille, which is formed by electric plating method and of which electron beam passing part is made of plural tape parts composed of a pair of metal bands and slit parts formed of tape part gaps, each metal band contains at least one layer or more of iron or iron system alloy layer that contains molybdenum, and the concentration of molybdenum in iron or iron system alloy layer is 0.01-5 mass % or less.
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