| 摘要 |
A process for improving the quality of a main magnetic film formed on a thick conductive substrate wherein a thin, fine grain, magnetic smoothing film of nickel-phosphorus is first deposited on the substrate and then the main magnetic film is formed on the smoothing film. The product formed comprises at least one main magnetic film formed on a thin fine grain, magnetic nickel-phosphorus smoothing layer. The main magnetic film is at least three times as thick as the smoothing layer. The smoothing layer contains from 0.5 to 8 percent phosphorus with the balance nickel.
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