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US 11,367,461 B2Granted
Magnetic recording medium having characterized magnetic layer, and magnetic recording and reproducing apparatus
AssigneeFUJIFILM Corporation
InventorNorihito Kasada
Life of this patent
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Abstract
The magnetic recording medium includes: a non-magnetic support; and a magnetic layer including ferromagnetic powder, in which a difference Safter−Sbefore between a spacing Safter measured on a surface of the magnetic layer by optical interferometry after methyl-ethyl-ketone cleaning and a spacing Sbefore measured on the surface of the magnetic layer by optical interferometry before methyl-ethyl-ketone cleaning is more than 0 nm and 15.0 nm or less, and the non-magnetic support is an aromatic polyamide support having a moisture absorption of 2.2% or less.
Claims14
A magnetic recording medium comprising:
- a non-magnetic support;
- and
- a magnetic layer including ferromagnetic powder,
- wherein a difference Safter−Sbefore between a spacing Safter measured on a surface of the magnetic layer by optical interferometry after methyl-ethyl-ketone cleaning and a spacing Sbefore measured on the surface of the magnetic layer by optical interferometry before methyl-ethyl-ketone cleaning is more than 0 nm and 15.0 nm or less, and
- the non-magnetic support is an aromatic polyamide support having a moisture absorption of 2.2% or less.
2 more elements
Dependencies are inferred from the claim text.