Abstract
An advanced electroless cobalt plating bath has been developed for increasing the recording density of 3.5″ hard disks, and its properties and magnetic film were analyzedBased on an investigation of many chelate agents of a plating bath, high coercivity and stability was obtained, and it was possible to obtain high S* and output by adding specific salts to the bath, while the addition of zinc resulted in low noise media having fine cristaliteThe use of a plating bath adjusted to an Hc of 1100Oe made it possible to achieve storage capacities of 40MB on 35″ disks
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