Title:
MAGNETIC RECORDING MEDIUM AND ITS PRODUCTION
Document Type and Number:
Japanese Patent JP2607357
Kind Code:
B2
Abstract:
PURPOSE: To provide a thin-layer magnetic recording medium which has excellent electromagnetic transducing characteristics, such as output and C/N, and to obtain the thin-layer magnetic recording medium having good head contact and good preservable stability at a good yield and ensuring a production efficiency.
CONSTITUTION: The magnetic recording medium formed is obtained by providing the surface of a base with a lower non-recording layer formed by dispersing powder into a binder and providing an upper recording layer formed by dispersing ferromagnetic powder into the binder thereon. The dry thickness of the upper recording layer is ≤1.0μm and the ferromagnetic powder of the upper recording layer is ferromagnetic alloy powder essentially consisting of Fe or Ni or Co. The lower nonmagnetic layer is a non-recording layer which contains magnetic powder of iron oxide or hexagonal barium ferrite and contains ≥100 pts.wt. nonmagnetic material per 100 pts.wt. magnetic powder.
Inventors:
Hiroo Inaba
Kiyoshi Ejiri
Kiyoshi Ejiri
Application Number:
JP13871796A
Publication Date:
May 07, 1997
Filing Date:
May 31, 1996
Export Citation:
Assignee:
Fuji Photo Film Co., Ltd.
International Classes:
B22F1/00; C01B31/02; C01G49/06; G11B5/716; G11B5/73; H01F1/047; C01G49/00; (IPC1-7): G11B5/704; B22F1/00; C01B31/02; C01G49/00; C01G49/06; H01F1/047
Domestic Patent References:
| JP59142741A | ||||
| JP61204827A | ||||
| JP63317926A | ||||
| JP63187418A | ||||
| JP2257424A | ||||
| JP4238111A | ||||
| JP4283416A | ||||
| JP4321924A | ||||
| JP4325915A | ||||
| JP512650A |
Attorney, Agent or Firm:
Tadashi Hagino (3 outside)