CPC C23C 16/4582 (2013.01) [C21D 6/001 (2013.01); C21D 8/021 (2013.01); C21D 8/0226 (2013.01); C21D 8/0247 (2013.01); C21D 8/0263 (2013.01); C21D 8/0278 (2013.01); C22C 33/04 (2013.01); C22C 38/08 (2013.01); C23F 1/02 (2013.01); C23F 1/28 (2013.01); H10K 71/00 (2023.02)] | 20 Claims |
1. A metal plate used for manufacturing a deposition mask, the metal plate comprising:
a first surface and a second surface positioned on the opposite side of the first surface, the metal plate being made of an invar material containing iron and nickel in an amount of 34% by mass or more; and
particles containing as a main component an element other than iron and nickel,
wherein in a sample including the first surface and the second surface of the metal plate, the following conditions (1) and (2) regarding the particles are satisfied
(1) a number of the particles having an equivalent circle diameter of 1 μm or more is 50 or more and 3000 or less per 1 mm3 in the sample, and
(2) a number of the particles having an equivalent circle diameter of 3 μm or more is 50 or less per 1 mm3 in the sample.
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