| 摘要 |
PURPOSE:To reduce a stage for working and to improve a finish surface by forming an Ni-P film on a doughnut disk, subjecting the same to texture working and finishing the surface by polishing with free abrasive grains. CONSTITUTION:The Ni-P plating is formed on the circular aluminum alloy substrate. A disk 3 is rotated by using a texture machine and a lapping film 2 is pressed to the substrate under a prescribed pressure through a rubber contact roll 1 by which the substrate is polished. Such substrate is polished by a polishing device and is subjected to cleaning and drying, by which the underlying substrate for a magnetic disk is formed. The underlying substrate having the texture is subjected to Co-Ni-P magnetic plating and further chromium carbon is formed by sputtering thereon, by which the magnetic recording medium is finished. |
