Substrate for magnetic recording media, manufacturing method for the same, and magnetic recording media

A manufacturing method for a substrate for a magnetic recording medium:

• mixing a polishing solution containing at least water and potassium hydroxide;
• polishing a surface of said magnetic recording medium by a total surface contact processing method wherein polishing is conducted by simultaneous contact of a processing member with an entire surface of said substrate surface.

A manufacturing method for a substrate for a magnetic recording medium, comprising:

• mixing a polishing solution containing at least water and potassium hydroxide;
• surface polishing a surface of said substrate using said polishing solution;
• said surface polishing is by a partial contact processing method wherein polishing is conducted by having a first section of a rotating substrate surface contact a second section of a processing member that is moving.

A manufacturing method for a substrate for a magnetic recording medium, comprising:

• mixing a polishing solution containing at least water and potassium hydroxide;
• surface polishing a surface of said substrate using said polishing solution;
• and then chemically strengthening said glass substrate.

A substrate for a magnetic recording medium having a surface polished using a mixture of water and at least potassium hydroxide.

A magnetic recording medium, comprising:

• a magnetic recording medium substrate having a polished surface polished using a mixture of water and at least potassium hydroxide;
• sequential layering of at least a magnetic layer on said surface;
• layering at least a protective layer on said magnetic layer.

A manufacturing method for a glass substrate for a magnetic recording medium, comprising:

• mixing a polishing solution of water and potassium hydroxide;
• and
• polishing a surface of said glass substrate with said polishing solution.