| 摘要 |
PROBLEM TO BE SOLVED: To provide an etching device of a shadow mask material, capable of improving the mechanical strength of the shadow mask and to provide a shadow mask having high mechanical strength. SOLUTION: In this shadow mask, while plural feeding pipes 11 are rocked to center their center axes by a rocking mechanism 20, an etching solution is fed from a spray nozzle 12 of each of the plural feeding pipes 11 toward the large-hole side surface (lower surface) of a shadow mask material W. The feeding direction of the etching solution in feeding pipes 111, 117 on both end parts in the width direction of the shadow mask material W is always set so as to be oriented toward the outside the widthwise direction of the shadow mask material W.
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