Magnetic recording medium and method for manufacturing the same
The invention is a magnetic recording medium which contains magnetic regions and non-magnetic regions. There are two or more of the magnetic regions with each of the regions containing a ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type, and a matrix agent, and each of the magnetic regions is formed as a physically separate shape. The invention also includes a manufacturing method for manufacturing the magnetic recording medium which comprises forming magnetic regions using a mask which uses a photopolymer to form the magnetic regions containing the ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type, and the matrix agent.
1 . A magnetic recording medium with a magnetic layer on a support containing magnetic regions and non-magnetic regions comprising:
two or more of the magnetic regions, wherein each of the regions contains a ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type, and a matrix agent, and where each of the magnetic regions is formed as a physically separate shape.
2 . The magnetic recording medium of claim 1 wherein:
the magnetic regions are formed in depressions formed on the support.
3 . The magnetic recording medium of claim 1 wherein:
the ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type, is in the form of magnetic particles which are orderly arranged.
4 . The magnetic recording medium of claim 2 wherein:
the ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type, is in the form of magnetic particles which are orderly arranged.
5 . The magnetic recording medium of claim 1 wherein:
the matrix agent is at least one nonmagnetic metal oxide compound selected from the group consisting of silica, titania or polysiloxane.
6 . The magnetic recording medium of claim 2 wherein:
the matrix agent is at least one nonmagnetic metal oxide compound selected from the group consisting of silica, titania or polysiloxane.
7 . The magnetic recording medium of claim 4 wherein:
the matrix agent is at least one nonmagnetic metal oxide compound selected from the group consisting of silica, titania or polysiloxane.
8 . A manufacturing method of the magnetic recording medium of claim 1 comprising:
forming magnetic regions using a mask which uses a photopolymer to form the magnetic regions which contain the ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type, and the matrix agent.
9 . A manufacturing method of the magnetic recording medium of claim 2 comprising:
forming magnetic regions using a mask which uses a photopolymer to form the magnetic regions which contain the ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type, and the matrix agent.
10 . A manufacturing method of the magnetic recording medium of claim 3 comprising:
forming magnetic regions using a mask which uses a photopolymer to form the magnetic regions which contain the ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type, and the matrix agent.
11 . A manufacturing method of the magnetic recording medium of claim 4 comprising:
forming magnetic regions using a mask which uses a photopolymer to form the magnetic regions which contain the ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type, and the matrix agent.
12 . A manufacturing method of the magnetic recording medium of claim 7 comprising:
forming magnetic regions using a mask which uses a photopolymer to form the magnetic regions which contain the ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type, and the matrix agent.
13 . The magnetic recording medium manufacturing method of claim 8 wherein:
the photopolymer is at least one polymer selected from the group consisting of polyterafluoroethylene, a copolymer of tetrafluoroethylene and perfluoroalkoxy vinyl ether, and a copolymer of ethylene and terafluoroethylene).
14 . The magnetic recording medium manufacturing method of claim 9 wherein:
the photopolymer is at least one polymer selected from the group consisting of polyterafluoroethylene, a copolymer of tetrafluoroethylene and perfluoroalkoxy vinyl ether, and a copolymers of ethylene and terafluoroethylene).
15 . The magnetic recording medium manufacturing method of claim 10 wherein:
the photopolymer is at least one polymer selected from the group consisting of polyterafluoroethylene, a copolymer of tetrafluoroethylene and perfluoroalkoxy vinyl ether, and a copolymer of ethylene and terafluoroethylene).
16 . The magnetic recording medium manufacturing method of claim 11 wherein:
the photopolymer is at least one polymer selected from the group consisting of polyterafluoroethylene, a copolymer of tetrafluoroethylene and perfluoroalkoxy vinyl ether, and a copolymer of ethylene and terafluoroethylene).
17 . The magnetic recording medium manufacturing method of claim 12 wherein:
the photopolymer is at least one polymer selected from the group consisting of polyterafluoroethylene, a copolymer of tetrafluoroethylene and perfluoroalkoxy vinyl ether, and a copolymer of ethylene and terafluoroethylene).
18 . The magnetic recording medium of claim 1 wherein:
the particle diameter of the ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type, is from about 5 to about 10 nm and the coefficient of variation of the particle diameter is about 10% or less.
19 . The method for manufacturing the magnetic recording medium of claim 1 wherein:
the ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type is synthesized by a liquid phase method.
20 . The method for manufacturing the magnetic recording medium of claim 1 wherein:
the ferromagnetic ordered alloy, of either a CuAu-type or Cu 3 Au-type is coated on a support.