Patent ID: 6572922
Filing Date: 2003-06-03
Classification: G11B

Abstract:
A method of manufacturing a magnetic recording medium, comprising the steps of:(a) preparing a sol solution containing solvent and gel particles; (b) treating said sol solution to remove therefrom gel particles having a size greater than a predetermined maximum size; (c) providing a non-magnetic substrate for a magnetic recording medium, said substrate including at least one surface; (d) applying a layer of the treated sol solution to said at least one surface of said substrate; (e) converting said layer of treated sol solution to a layer of sol-gel having a hardness less than that of said at least one surface of said substrate, an exposed surface of said layer of sol-gel having substantially no defects in the form of protrusions or bumps; (f) forming a pattern in said exposed surface of said layer of sol-gel; and (g) converting said layer of sol-gel to a layer having a density and hardness substantially comparable to that of said at least one surface of said substrate, while preserving said pattern formed in step (f).