Patent ID: 6696183
Filing Date: 2004-02-24
Classification: G11B,Y10S,Y10T

Abstract:
A metallic thin film magnetic recording medium comprising:a magnetic layer formed on one face of a nonmagnetic supporting body according to vacuum thin film formation technology, and a carbon protective layer formed on said magnetic layer to a thickness of 4 nm to 15 nm; wherein a thickness of said nonmagnetic supporting body is 5 nm or less, and wherein a thickness of said magnetic layer is 20 nm-100 nm, said metallic thin film magnetic recording medium further comprising: a lining layer having a thickness of 20 nm-200 nm formed on a another face opposite to said magnetic layer formation face, of one of metal, non-metal, alloy and oxide compound thereof according to vacuum thin film formation technology; and a back layer formed on said lining layer, said back layer being formed in a thickness of 10-200 nm and with a relative roughness factor (Ra) of an exposed surface of said back layer being 2-15 nm.