Magnetic recording medium
First Claim
1. A magnetic recording medium, comprising a non-magnetic support and at least two layers, the at least two layers comprising at least one lower non-magnetic layer comprising non-magnetic particles and a binder, one of the at least one non-magnetic layers being located on the non-magnetic support, and at least one upper magnetic layer comprising ferromagnetic particles and a binder, one of the at least one upper magnetic layers being located on the lower non-magnetic layer located on the non-magnetic support, wherein the upper magnetic layer located on the lower non-magnetic layer located on the non-magnetic support has a mean total thickness d more than 0.01 μ
- m to less than 0.3 μ
m, and a standard deviation σ
of the total thickness of the upper magnetic layer located on the lower non-magnetic layer located on the non-magnetic support and the mean total thickness d satisfy the following relationship;
space="preserve" listing-type="equation">0.05<
σ
/d<
0.5.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a magnetic recording medium comprising at least two layers comprising at least one lower non-magnetic layer containing at least a non-magnetic particle and a binder on a non-magnetic support, and at least one upper magnetic layer containing at least a ferromagnetic particle and a binder on the lower non-magnetic layer, wherein a mean total thickness d of the upper magnetic layer is more than 0.01 μm to less than 0.3 μm, and a standard deviation σ of the total thickness of the upper magnetic layer and the mean total thickness d of the upper magnetic layer satisfy the relationship of 0.05≦σ/d≦0.5.
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Citations
20 Claims
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1. A magnetic recording medium, comprising a non-magnetic support and at least two layers, the at least two layers comprising at least one lower non-magnetic layer comprising non-magnetic particles and a binder, one of the at least one non-magnetic layers being located on the non-magnetic support, and at least one upper magnetic layer comprising ferromagnetic particles and a binder, one of the at least one upper magnetic layers being located on the lower non-magnetic layer located on the non-magnetic support, wherein the upper magnetic layer located on the lower non-magnetic layer located on the non-magnetic support has a mean total thickness d more than 0.01 μ
- m to less than 0.3 μ
m, and a standard deviation σ
of the total thickness of the upper magnetic layer located on the lower non-magnetic layer located on the non-magnetic support and the mean total thickness d satisfy the following relationship;
space="preserve" listing-type="equation">0.05<
σ
/d<
0.5. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
- m to less than 0.3 μ
Specification