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Magnetic thin film medium comprising amorphous sealing layer for reduced lithium migration

  • US 6,120,890 A
  • Filed: 11/05/1998
  • Issued: 09/19/2000
  • Est. Priority Date: 12/12/1997
  • Status: Expired due to Fees
First Claim
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1. A longitudinal or perpendicular magnetic recording medium comprising:

  • a substrate comprising a glass or glass-ceramic material containing about 0.5 to about 32 wt. % lithium oxide (Li2 O);

    at least one sealing layer comprising amorphous nickel-phosphorus; and

    a magnetic layer, wherein the sealing substantially prevents the migration of Li from the substrate.

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  • 8 Assignments
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