Patent ID: 9005699
Filing Date: 2015-04-14
Classification: G11B

Abstract:
1. A method for manufacturing a magnetic recording medium comprising the steps of: (a) forming a magnetic recording layer comprising a first magnetic layer and a second magnetic layer, the first magnetic layer being a granular layer having a granular structure while the second magnetic layer being a continuous film layer, wherein the continuous film layer is a multilayer film, (b) applying an ion beam to regions between tracks of the magnetic recording medium so as to form separation regions for magnetically separating the tracks from each other, wherein: the step (b) is performed after the step (a), the step (a) comprises the step of forming the second magnetic layer on the first magnetic layer, and a plurality of types of metal films having different compositions are laminated in the multilayer film; and in the step (b), the second magnetic layer is irradiated with the ion beam such that the plurality of types of metal films are melted by the ion beam to form an alloy of metals contained in the plurality of types of metal films to thereby form the separation regions, and the separation regions are formed only in the second magnetic layer of the magnetic recording layer of the magnetic recording medium, wherein the resulting separation regions formed in the second magnetic layer are nonmagnetic.