Patent ID: 6991861
Filing Date: 2006-01-31
Classification: G11B

Abstract:
1. A magnetic recording medium comprising: a multilayer-coating-type magnetic recording medium having a non-magnetic layer mainly composed of a non-magnetic powder and binder, and a magnetic layer mainly composed of a ferromagnetic powder and a binder, which are stacked in this order on a non-magnetic substrate, wherein dispersion σL/L of long-axis length of all ferromagnetic powder particles contained in said magnetic layer falls in a range of σL/L≦±10%, where L is an average long-axis length and σL is a standard deviation thereof, dispersion σW/W of short-axis length of all ferromagnetic powders contained in said magnetic layer falls in a range of σW/W≦±15%, where W is an average short-axis length and σW is a standard deviation thereof, and a thickness of said magnetic layer is 0.2 μm or less.