Silicon nitride protective coatings for silvered glass mirrors
A protective diffusion barrier for metalized mirror structures is provided by a layer or coating of silicon nitride which is a very dense, transparent, dielectric material that is impervious to water, alkali, and other impurities and corrosive substances that typically attach the metal layers of mirrors and cause degradation of the mirrors' reflectivity. The silicon nitride layer can be deposited on the substrate before metal deposition to stabilize the metal/substrate interface, and it can be deposited over the metal to encapsulate it and protect the metal from corrosion or other degradation. Mirrors coated with silicon nitride according to this invention can also be used as front surface mirrors.
- Assignee:
- Dept. of Energy, Washington, DC
- Patent Number(s):
- US 4780372
- OSTI ID:
- 6265451
- Country of Publication:
- United States
- Language:
- English
Similar Records
Silicon nitride protective coatings for silvered glass mirrors
Passivation coating for flexible substrate mirrors
Related Subjects
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
360205 -- Ceramics
Cermets
& Refractories-- Corrosion & Erosion
COATINGS
CORROSION RESISTANCE
DENSITY
DEPOSITION
DIELECTRIC MATERIALS
DIELECTRIC PROPERTIES
ELECTRICAL PROPERTIES
FABRICATION
GLASS
MATERIALS
MIRRORS
NITRIDES
NITROGEN COMPOUNDS
OPACITY
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
PNICTIDES
PROTECTIVE COATINGS
REFLECTIVITY
SILICON COMPOUNDS
SILICON NITRIDES
SILVER COMPOUNDS
SUBSTRATES
SURFACE PROPERTIES
TRANSITION ELEMENT COMPOUNDS