| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method, by which an aperture grill, having high accuracy and fineness, which will not produce halation at the end part of an image surface, can be manufactured by plating method, with high yield and at a low cost. SOLUTION: A slit-shaped resist pattern group is formed by arranging a light source of linear scattered light, directly above the center of a conductor plate surface, in parallel with the direction of slits, and adjusting the distance between the light source of linear scattered light and the conductive plate surface, and exposing the scattered light on a resist layer. For the aperture grill formed by plating method, using the slit-shaped resist pattern group, the shape of cross section of a tape part 1a, in a direction perpendicular to the direction of the slits, is almost rectangular at the center part, and almost shaped in a parallelogram with an acute angle part slanted toward the center at both end parts, and the angel of the acute angle part gets smaller as it is headed to both end parts, and angelθof the acute angel part at both endmost part becomes 70 deg.-50 deg..
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