Back to results
US 4,544,574 AGranted
Method of manufacturing a magnetic recording medium
AssigneeFuji Xerox Co., Ltd.
InventorsTeruhiko Itami, Toshifumi Kimoto, Akira Yamasawa, Koichi Saitoh
Life of this patent
Estimating the term…
Abstract
A method for manufacturing a magnetic recording medium wherein a first magnetic layer having a repetitive magnetization pattern is formed on a base layer, an intermediate layer of non-magnetic material is formed over the first magnetic layer, and a second magnetic layer in which magnetic particles are orientated in a predetermined direction is formed on the intermediate layer.
Claims7
A method for manufacturing a magnetic recording medium comprising the steps of:
- forming a first magnetic layer on a non-magnetic base member;
- forming a second magnetic layer over said first magnetic layer, wherein the magnetic force and the residual magnetization of said first magnetic layer is greater than said second magnetic layer;
- drying said first and second magnetic layers;
- orienting the magnetic particles in said first magnetic layer and said second magnetic layer in a common direction;
- forming a repetitive magnetization pattern in said first magnetic layer and said second magnetic layer;
- and
- erasing said repetitive magnetization pattern in said second magnetic layer by orienting the magnetic particles in said second magnetic layer in a common direction.
4 more elements
Dependencies are inferred from the claim text.