Patent ID: 6410104
Filing Date: 2002-06-25
Classification: G11B

Abstract:
A method of manufacturing a magnetic recording medium, the method comprising:electrolessly depositing an amorphous nickel-phosphorous (Niâ€”P) coating on a non-magnetic substrate employing a plating bath containing aluminum (Al) and/or copper (Cu) ions in an effective amount to achieve an as-deposited average surface roughness (Ra) less than about 10 Ã¥ and a magnetic formation temperature not less than about 320Â° C.; and cleaning the Niâ€”P coating with an acidic agent having a pH less than about 4 or an alkaline agent having a pH greater than about 12 without any substantial depletion of nickel from the surface of the Niâ€”P coating and without lowering the magnetic transformation temperature.