Magnetic recording medium and production thereof
First Claim
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1. A magnetic recording medium comprising a substrate, a magnetic layer and a first protective layer which consists of an organic polymeric material comprising carbon atoms, hydrogen atoms and oxygen atoms, the content of the oxygen atom increasing towards the outer surface of the protective layer, the thickness of the protective layer ranging from 20 to 2,000 Å
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Abstract
A magnetic recording medium comprising a substrate, a magnetic layer and a protective layer which consists of an organic polymeric material comprising carbon atoms, hydrogen atoms and oxygen atoms, the content of the oxygen atoms increasing towards the outer surface of the protective layer, which has improved durability and corrosion resistance.
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Citations
12 Claims
- 1. A magnetic recording medium comprising a substrate, a magnetic layer and a first protective layer which consists of an organic polymeric material comprising carbon atoms, hydrogen atoms and oxygen atoms, the content of the oxygen atom increasing towards the outer surface of the protective layer, the thickness of the protective layer ranging from 20 to 2,000 Å
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4. A magnetic recording medium comprising a substrate, a magnetic layer, a first protective layer which consists of an organic polymeric material comprising carbon atoms, hydrogen atoms and oxygen atoms, the content of the oxygen atom increasing towards the outer surface of the protective layer, wherein the oxygen content within a 20 Å
- thickness at the surface of the first protective layer is from 5 to 70% by weight of the organic polymer in said thickness and a second protective layer of a lubricant formed on said first protective layer.
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