Patent ID: 8980451
Filing Date: 2015-03-17
Classification: B82Y,G11B

Abstract:
1. A magnetic recording medium comprising: a ferromagnetic recording part formed on a discoidal substrate, the ferromagnetic recording part comprising a ferromagnetic film, a track pattern having a pattern formed of a plurality of tracks or a bit pattern having a pattern formed of a plurality of bits being formed on the ferromagnetic film, and a ferromagnetism-deactivated part formed in a region for isolating the ferromagnetic recording part between the tracks or the bits, the ferromagnetism-deactivated part having a content of implanted B set at 15 at % or more and having a height higher than a height of the ferromagnetic film, wherein a thickness of the ferromagnetism-deactivated part is greater than a thickness of the ferromagnetic recording part, and a surface asperity of the ferromagnetism-deactivated part is greater than a surface asperity of the ferromagnetic recording part.