| 摘要 |
PURPOSE:To obtain a metallic sheet for an Fe-Ni alloy shadow mask reducing unevenness in the diameter and shape of holes and capable of giving a high quality shadow mask causing no irregularity by removing the surface layer of a material by pickling, chemical polishing or other means after final annealing. CONSTITUTION:The surface layer of an Fe-Ni alloy sheet subjected to final annealing in a gaseous H2-N2 mixture (cracked gas of NH3) is removed by pickling, chemical polishing or other means. After oxide and nitride layers formed on the surface layer are removed, cold rolling is desirably carried out to obtain a metallic sheet for an Fe-Ni alloy shadow mask having controlled shape and surface roughness. Since the oxide and nitride layers are removed, the etchability is improved and the occurrence of irregularity after etching can be prevented.
|
