Patent ID: 6696172
Filing Date: 2004-02-24
Classification: G11B,Y10T

Abstract:
A magnetic recording medium comprising:a non-magnetic substrate; a non-magnetic underlayer on said non-magnetic substrate; a non-magnetic intermediate layer on said non-magnetic underlayer; a magnetic layer on said non-magnetic intermediate layer; a protective layer on said magnetic layer; a liquid lubricant layer on said protective layer; said magnetic layer includes ferromagnetic grains and nonmagnetic grain boundaries, formed of at least one of a metallic oxide and a carbide, surrounding said ferromagnetic grains; and wherein said non-magnetic intermediate layer comprises at least two laminated layers having identical or different compositions, and wherein said at least two laminated layers both comprise grains of non-magnetic substance, and non-magnetic grain boundaries formed of at least one of a metallic oxide and a carbide, surrounding said grains of non-magnetic substance.