Method for treatment of a glass substrate with improved edge strength

A method for treatment of a glass substrate for a magnetic medium of a magnetic recording device, comprising:

• providing a glass substrate wherein an edge of the glass substrate has filamentary damage from a filamentation process used to cut the edge of the glass substrate;
• and
• polishing directly on the filamentary damage on the edge of the glass substrate with a polishing slurry, wherein the polishing alone substantially removes a sufficient portion of the filamentary damage on the edge to obtain at least a minimum edge strength for use in the magnetic medium of the magnetic recording device;
• and
• wherein the polishing of the glass substrate comprises polishing the edge of the glass substrate to remove at least 1.5-6 μm of the filamentary damage on the edge such that the glass substrate comprises at least the minimum edge strength for use in the magnetic medium of the magnetic recording device.

A method for treatment of a glass substrate for media of a magnetic recording apparatus, comprising:

• providing a glass substrate wherein an edge of the glass substrate has filamentary damage from a filamentation process used to cut the edge of the glass substrate;
• etching the glass substrate to remove a first portion of the filamentary damage from the edge of the glass substrate;
• and
• after etching, polishing the glass substrate to remove a second portion of the filamentary damage from the edge of the glass substrate, wherein the first portion and the second portion combined is a sufficient portion of the filamentary damage on the edge such that the glass substrate comprises at least a minimum edge strength for use in the media of the magnetic recording apparatus.