| 摘要 |
A magnetic disk medium having a magnetic layer formed on its substrate, is characterized in that in a portion of the substrate where a magnetic head runs is formed a concave groove in which a cushion material is provided, whereby the contact pressure appearing between it and the magnetic head is lowered. Preferably, the cushion material is either plastic foam selected from the group consisting of polyurethane foam, polystyrene foam, cellular polyethylene, cellular rubber, cellular polyvinyl chloride, and foamed polyester, or elastic silicone resin.
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