| 摘要 |
A screen is manufactured by carrying out a step of electroforming a base layer and a step of electroforming a protection layer. In the base layer electroforming step, a cylindrical mother die with a copper circumferential surface is immersed in an electroforming solution containing nickel ions. Then, while electric current is allowed to flow between the mother die and a nickel electrode plate, the mother die is rotated. Thus, a nickel base layer is formed on the circumferential surface of the mother die. In the protection layer electroforming step, a first masking material is provided at a certain predetermined position on the base layer. Then, while electric current is allowed again to flow, the mother die is rotated. Thus, a nickel protection layer is formed on the base layer avoiding the position on the masking material.
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