Patent Number: 6,254,964

Title: Magnetic recording medium

Abstract: A magnetic recording medium is disclosed, which comprises a support having thereon a substantially nonmagnetic lower layer and a magnetic layer comprising a ferromagnetic metal powder or a ferromagnetic hexagonal ferrite powder dispersed in a binder formed on the lower layer, which is a magnetic recording medium for recording signals having areal recording density of from 0.17 to 2 G bit/inch.sup.2, wherein the coercive force of the magnetic layer is 1,800 Oe or more, the average long axis length of the ferromagnetic metal powder is 0.15 .mu.m or less, and the average particle size of the ferromagnetic hexagonal ferrite powder is 0.10 .mu.m or less; or wherein the dry thickness of the magnetic layer is from 0.05 to 0.30 .mu.m, .phi.m is from 10.0.times.10.sup.-3 to 1.0.times.10.sup.-3 emu/cm.sup.2, and the coercive force of the magnetic layer is 1,800 Oe or more. The object of the present invention is to provide a magnetic recording medium which is markedly improved in electromagnetic characteristics, particularly, high density recording characteristics, and is excellent in durability: and to provide a high capacity magnetic recording medium, in particular, a disc-like magnetic recording medium, having a high recording capacity of from 0.17 to 2 Gbit/inch.sup.2.

Inventors: Saito; Shinji (Kanagawa, JP), Noguchi; Hitoshi (Kanagawa, JP), Yamazaki; Nobuo (Kanagawa, JP), Nakamikawa; Junichi (Kanagawa, JP)

Assignee: Fuji Photo Film Co., Ltd.

International Classification: G11B 5/71 (20060101); G11B 5/714 (20060101); G11B 5/70 (20060101); G11B 005/70 ()

Expiration Date: 07/03/2018