Glass substrates for heat assisted magnetic recording (hamr) and methods and apparatus for use with the glass substrates
AssigneeWestern Digital Technologies, Inc.
InventorShoji Suzuki
Life of this patent
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Abstract
Aspects relate to a glass substrate. In some examples, the thickness of the glass substrate is less than 0.5 millimeters, and an activation energy for viscous flow of the glass substrate is greater than 250 kilojoules per mole. In some examples, the diameter of the glass substrate is greater than 95 millimeters. In some examples, a magnetic storage device includes a plurality of magnetic recording disks incorporating such a glass substrate. Aspects also relate to determining whether a glass substrate is suitable for use in a magnetic recording medium. In some examples, this determination is based on an activation energy of the glass substrate.
Claims22
A glass substrate for a magnetic recording medium,
- a thickness of the glass substrate being less than 0.5 millimeters;
- and
- an activation energy for viscous flow of the glass substrate being greater than 250 kilojoules per mole.
A method for determining a suitability of a glass substrate for use in a magnetic recording medium, the method comprising:
- determining an activation energy associated with a particular thickness of the glass substrate, the particular thickness being less than a thickness threshold;
- determining whether the activation energy is greater than an activation energy threshold;
- and
- determining whether the glass substrate is suitable for use in the magnetic recording medium based on the determining whether the activation energy is greater than the activation energy threshold.
Dependencies are inferred from the claim text.