| 摘要 |
An apertured shadow mask is curved so that the curvature is concave on the back surface. The front surface generally follows the curvature of the back surface but has an undulating profile with ribs separated by troughs. The local thickness of the shadow mask is greatest in the ribs, and becomes gradually thinner toward the center lines of the troughs. The ribs and the center lines of the troughs have a zig-zag configuration. As a result, the front surface and neutral plane of the shadow mask have both convex and concave areas, which reduces localized doming.
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