MAGNETIC RECORDING MEDIUM
First Claim
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1. A magnetic recording medium comprising:
- a base substance having flexibility;
a crystal control layer provided on the base substance; and
a magnetic layer provided on the crystal control layer, whereinthe magnetic recording medium has a recording surface having an average surface roughness SRa of 3.0 μ
m or less,the number of projections having a height of 7.5 nm or more included in a unit region (where the unit region is a square region with each side having a length of 30 μ
m) of the recording surface is 256 or more, andthe number of projections having a height of 15 nm or more included in the unit region of the recording surface is 0 or more and 104 or less.
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Abstract
A magnetic recording medium has a recording surface having an average surface roughness SRa of 3.0 μm or less, the number of projections having a height of 7.5 nm or more included in a unit region (where the unit region is a square region with each side having a length of 30 μm) of the recording surface is 256 or more, and the number of projections having a height of 15 nm or more included in the unit region of the recording surface is 0 or more and 104 or less.
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Citations
20 Claims
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1. A magnetic recording medium comprising:
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a base substance having flexibility; a crystal control layer provided on the base substance; and a magnetic layer provided on the crystal control layer, wherein the magnetic recording medium has a recording surface having an average surface roughness SRa of 3.0 μ
m or less,the number of projections having a height of 7.5 nm or more included in a unit region (where the unit region is a square region with each side having a length of 30 μ
m) of the recording surface is 256 or more, andthe number of projections having a height of 15 nm or more included in the unit region of the recording surface is 0 or more and 104 or less. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification