| 摘要 |
In a shadow mask 201, a large number of slots 2 are made in a mask body 201a in the horizontal direction X and in the vertical direction Y. Each slot 2 has a roughly rectangular backside opening 21 and a roughly rectangular front-side opening 22 that are made by an etching process, and a through-hole 11 that connects these two openings. Of the multiple slots 2 made in the mask body 201a, those slots that are situated at least in the outer end part of the horizontal axis 3 of the mask body 201a or in the outer end part of the diagonal axis 5 of the mask body 201a have rectangular through-holes 11 with protrudent parts 21a (21b), each protrudent part protruding, in the direction opposite to the vertical axis 4, from at least one of the upper and lower end parts of the long side, situated on the side part from the vertical axis 4, of the rectangle, and extended-space parts 25, each extended-space part extending, in the direction in which the vertical axis 4 extends, from at least one of the two short sides of the rectangle to make the through-hole 11, in its plane view, larger. The extended-space part 25 of each through-hole 11 gradually broadens in the vertical direction, from the starting point of extension 25a situated on the vertical axis 4 side in the mask body 201a toward the end point of extension 25b situated on the peripheral part side in the mask body 201a.
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