| 摘要 |
A method of manufacturing a stamper for an optical information recording medium includes the steps of: preparing a mother stamper having a surface layer in which a grooved pattern is formed; forming a conductive layer on the mother stamper; and forming a nickel layer on the conductive layer by electroplating the mother stamper in a plating solution consisting mainly of nickel sulfamate. In this method, during the process of forming the nickel layer, a current density is varied in at least two cycles, of which each cycle includes to increase, to maintain, and to decrease the current density sequentially in this order.
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