Vacuum insulating glass unit including infrared meltable glass frit, and/or method of making the same
AssigneeGuardian Industries Corp.
InventorYei-Ping (Mimi) H. Wang
Life of this patent
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Abstract
A method of making a vacuum insulating glass (VIG) unit. The method includes providing first and second substantially parallel spaced-apart glass substrates, a glass frit being provided at least partially between the first and second glass substrates for sealing said one or more edge portions to be sealed; and irradiating infrared energy towards the one or more edge portions to be sealed in forming an edge seal. The glass frit has a glass redox (FeO/Fe2O3) that is higher than a glass redox (FeO/Fe2O3) of the first and second substrates.
Claims14
A method of making a vacuum insulating glass (VIG) unit, the method comprising:
- providing first and second substantially parallel spaced-apart glass substrates, the first and second substrates each including one or more edge portions to be sealed, a glass frit being provided at least partially between the first and second glass substrates for sealing said one or more edge portions to be sealed;
- and
- irradiating infrared energy from one or more infrared energy sources towards the one or more edge portions to be sealed in forming an edge seal of the VIG unit,
- wherein the glass frit has a glass redox (FeO/Fe2O3) that is higher than a glass redox (FeO/Fe2O3) of the first and second substrates.
A method of making a vacuum insulating glass (VIG) unit, the method comprising:
- having first and second substantially parallel spaced-apart heat treated (HT) glass substrates, the first and second substrates each including one or more edge portions to be sealed;
- providing a glass frit at least partially between the first and second glass substrates for sealing said one or more edge portions to be sealed;
- and
- irradiating infrared energy at 0.9-1.2 microns from one or more infrared energy sources towards the one or more edge portions to be sealed in forming an edge seal of the VIG unit,
- wherein the glass frit includes an increased amount of ferrous oxide compared to the glass substrates such that the irradiating of the infrared energy causes the first and/or second substrate to reach a first elevated temperature and the glass frit to reach a second elevated temperature, the second elevated temperature being higher than the first elevated temperature and the first elevated temperature being sufficiently low to reduce the likelihood of the first and/or second substrate melting and losing HT strength, and
- causing a gap between the first and second substrates to be at a pressure less than atmospheric.
Dependencies are inferred from the claim text.