Magnetic recording medium
First Claim
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1. A magnetic recording medium, comprising:
- (i) a nonmagnetic substrate,(ii) an intermediate layer, on said nonmagnetic substrate, comprising a nonmagnetic powder, and(iii) a magnetic layer, on said intermediate layer, comprising a ferromagnetic powder and a binder,wherein said magnetic layer has an indentation hardness of 0.3 GPa or more,said magnetic layer has a 10 point height parameter R2 of 100 nm or less,said magnetic layer has a difference between the maximum peak-to-valley distance PV and Rz of 4 to 10 nm, andsaid magnetic layer has a skewness Rsk of -2 to less than 0.
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Abstract
A magnetic recording medium having a nonmagnetic substrate, an intermediate layer containing at least a nonmagnetic powder, and a magnetic layer containing a ferromagnetic powder and a binder, wherein the magnetic layer has an indentation hardness of 0.3 GPa or more, and the surface profile of the magnetic layer satisfies the following conditions (a) to (c): (a) the 10 point height parameter RZ is 100 nm or less; (b) the difference between the maximum peak-to-valley distance PV and RZ (PV-RZ) is 10 nm or less; and (c) the skewness Rsk is -2 or more and less than 0, has excellent electromagnetic conversion characteristics and running durability.
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18 Claims
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1. A magnetic recording medium, comprising:
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(i) a nonmagnetic substrate, (ii) an intermediate layer, on said nonmagnetic substrate, comprising a nonmagnetic powder, and (iii) a magnetic layer, on said intermediate layer, comprising a ferromagnetic powder and a binder, wherein said magnetic layer has an indentation hardness of 0.3 GPa or more, said magnetic layer has a 10 point height parameter R2 of 100 nm or less, said magnetic layer has a difference between the maximum peak-to-valley distance PV and Rz of 4 to 10 nm, and said magnetic layer has a skewness Rsk of -2 to less than 0. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification