| 摘要 |
PROBLEM TO BE SOLVED: To provide a copper foil having a blackened surface to be used for the manufacturing of an electromagnetic shield materials for a plasma display for preventing surface quality from being deteriorated. SOLUTION: The blackened surface is exposed to various chemicals to be used for the etching process, and the reflectivity change of the blackened surface after copper mesh formation by etching is set to be 2 or less. Also, a nickel layer is formed on the blackened surface with a coating weight ranging from 0.1 to 5.0 mg/dm<SP>2</SP>by nickel conversion. Then, chromate treatment may be carried out to the surface. COPYRIGHT: (C)2008,JPO&INPIT
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