High transmittance, low emissivity coatings for substrates
US5302449A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 27, 1992 |
| Grant date | Apr 12, 1994 |
| Priority date | — |
| Expiry date | Mar 27, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The present invention provides a coating for a transparent substrate which exhibits a neutral color through a wide range of angles of incidence a light. The coating employs a base coat adjacent to the transparent substrate having a thickness of no more than about 275 Angstroms and may include two reflective metal layers having an intermediate layer of an anti-reflective metal oxide therebetween and an outer anti-reflective layer of metal oxide over the second reflective metal layer. If so desired, the coating of the invention may include an abrasive-resistant overcoat as its outer most layer. This overcoat is desirably formed of an abrasive-resistant metal oxide, such as zinc oxide, applied at a thickness which does not significantly affect the optical properties of said coated substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.