Methods for improving the strength of glass substrates
View Patent ↗Methods for improving the strength of glass substrates are described. One such method for strengthening a glass disk substrate for a storage device includes immersing at least a portion of the glass substrate in a solution, the solution including a solvent and a coating material selected from the group consisting of NaOH, KOH, and KNO 3 , removing the glass substrate from the solution, allowing the solvent to evaporate from the glass substrate, and heating the glass substrate at a preselected temperature for a preselected duration, where the preselected temperature is sufficient to substantially melt the coating material and is less than a transition temperature of the glass substrate.
1. A method for strengthening a glass disk substrate for a storage device, the method comprising:
immersing at least a portion of the glass substrate in a solution, the solution consisting of a solvent and a coating material consisting of NaOH;
removing the glass substrate from the solution;
allowing the solvent to evaporate from the glass substrate; and
heating the coating material on the glass substrate at a preselected temperature for a preselected duration, wherein the preselected temperature is sufficient to substantially melt the coating material and is less than a transition temperature of the glass substrate.
2. The method of claim 1 , wherein the heating the coating material on the glass substrate at the preselected temperature for the preselected duration further comprises rapidly cooling the glass substrate.
3. The method of claim 2 , wherein the rapidly cooling the glass substrate comprises immersing the glass substrate in a liquid, the liquid having a preselected temperature less than a temperature of the glass substrate.
4. The method of claim 2 , wherein the rapidly cooling the glass substrate comprises applying a gas to the glass substrate for a preselected duration, the gas having a preselected temperature less than a temperature of the glass substrate.
5. The method of claim 4 , wherein the preselected duration for applying the gas is about 30 minutes.
6. The method of claim 1 , wherein the glass substrate comprises an aluminosilicate glass substrate.
7. The method of claim 1 , wherein the glass substrate comprises a borosilicate glass substrate.
8. The method of claim 1 , wherein the allowing the solvent to evaporate from the glass substrate comprises allowing the solvent to evaporate from the glass substrate, wherein the coating material forms a film on a surface of the glass substrate after the solvent has substantially evaporated.
9. The method of claim 1 , wherein the preselected temperature is in a range of about 320 degrees Celsius to about 380 degrees Celsius.
10. The method of claim 1 , wherein the preselected temperature is about 370 degrees Celsius.
11. The method of claim 1 , wherein the preselected duration is in a range of about 30 minutes to about 240 minutes.
12. The method of claim 1 , wherein the preselected duration is about 60 minutes.
13. The method of claim 1 , further comprising:
depositing at least one layer comprising magnetic material on the glass substrate, the at least one layer configured to be used for recording information.
14. The method of claim 1 , wherein the glass substrate is configured for use within the storage device.
15. A method for strengthening a glass disk substrate for a storage device, the method comprising:
immersing at least a portion of the glass substrate in a solution consisting of a solvent and a coating material consisting of NaOH;
removing the glass substrate from the solution;
allowing the solvent to evaporate from the glass substrate; and
heating the coating material on the glass substrate at a preselected temperature for a preselected duration, wherein the preselected temperature is sufficient to substantially melt the coating material and is less than a transition temperature of the glass substrate,
wherein the solvent is a material selected from the group consisting of water, methanol, and ethanol.
16. The method of claim 15 , wherein the solvent is methanol.
17. The method of claim 15 , wherein the solvent is ethanol.
18. The method of claim 15 , wherein the solvent is water.