Multi-layer magnetic recording medium, method and system of manufacture
First Claim
1. A multi-layer magnetic recording medium comprising a nonmagnetic substrate having provided thereon a magnetic inner layer having a squareness ratio of from 0.10 to 0.65, and a saturation magnetization from 1.0×
- 10−
4 to 1.5×
10−
3 gauss-meters, and a magnetic outer layer containing ferromagnetic particles.
6 Assignments
0 Petitions
Accused Products
Abstract
A multi-layer magnetic recording medium and a method for making a multi-layered magnetic recording media as described. The recording medium has magnetic inner layer with magnetic particles having a specific squareness ratio and saturation magnetization which results in superior high frequency output and improved overwrite characteristics. The method for making a magnetic recording medium involves controlled, partial drying of the inner layers to avoid intermixing of the respective layers while facilitating efficient fabrication.
82 Citations
24 Claims
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1. A multi-layer magnetic recording medium comprising a nonmagnetic substrate having provided thereon a magnetic inner layer having a squareness ratio of from 0.10 to 0.65, and a saturation magnetization from 1.0×
- 10−
4 to 1.5×
10−
3 gauss-meters, and a magnetic outer layer containing ferromagnetic particles. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- 10−
-
14. A multi-layer magnetic recording tape comprising a nonmagnetic substrate having provided thereon a magnetic inner layer having a thickness of 0.1 to 3.0 mm, a squareness ratio of from 0.10 to 0.65, and a saturation magnetization of from 1.0×
- 10−
4 to 1.5×
10−
3 gauss-meter, and a magnetic outer layer with a thickness of 0.05 to 1.0 μ
m containing ferromagnetic particles. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
- 10−
Specification