CPC G03F 7/0035 (2013.01) [B21B 1/22 (2013.01); C21D 6/001 (2013.01); C21D 8/0247 (2013.01); C22C 38/08 (2013.01); C23C 14/042 (2013.01); C23C 14/24 (2013.01); C25D 1/04 (2013.01); C25D 3/562 (2013.01); G03F 7/0015 (2013.01); G03F 7/0027 (2013.01); G03F 7/2008 (2013.01); G03F 7/2022 (2013.01); H10K 71/00 (2023.02); H10K 50/11 (2023.02); H10K 59/00 (2023.02); H10K 71/166 (2023.02)] | 20 Claims |
16. A method for manufacturing a metal plate used for manufacturing a deposition mask, the method comprising:
a production step of obtaining the metal plate by a rolling process or a plating process,
wherein the metal plate comprises a surface including a longitudinal direction of the metal plate and a width direction orthogonal to the longitudinal direction, and
wherein a surface reflectance of a reflected light observed when a light is incident on the surface of the metal plate is 8% or more and 25% or less, the surface reflectance being measured based on the reflected light on the surface at an angle of 45°±0.2° in at least one plane orthogonal to the surface.
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