Silicon nitride protective coatings for silvered glass mirrors
Abstract
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 attack 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.
- Inventors:
-
- Golden, CO
- Issue Date:
- Research Org.:
- Midwest Research Institute, Kansas City, MO (United States)
- OSTI Identifier:
- 866751
- Patent Number(s):
- 4780372
- Assignee:
- United States of America as represented by United States (Washington, DC)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C03 - GLASS C03C - CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS
G - PHYSICS G02 - OPTICS G02B - OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
- DOE Contract Number:
- AC02-83CH10093
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- silicon; nitride; protective; coatings; silvered; glass; mirrors; diffusion; barrier; metalized; mirror; structures; provided; layer; coating; dense; transparent; dielectric; material; impervious; water; alkali; impurities; corrosive; substances; typically; attack; metal; layers; degradation; reflectivity; deposited; substrate; deposition; stabilize; interface; encapsulate; protect; corrosion; coated; according; front; surface; protective coatings; protective coating; diffusion barrier; metal layers; metal layer; silicon nitride; front surface; dielectric material; metal deposition; protective diffusion; substrate interface; silvered glass; typically attack; nitride layer; mirror structures; metal deposit; metalized mirror; mirror structure; glass mirrors; corrosive substances; surface mirrors; /428/359/427/
Citation Formats
Tracy, C Edwin, and Benson, David K. Silicon nitride protective coatings for silvered glass mirrors. United States: N. p., 1988.
Web.
Tracy, C Edwin, & Benson, David K. Silicon nitride protective coatings for silvered glass mirrors. United States.
Tracy, C Edwin, and Benson, David K. Fri .
"Silicon nitride protective coatings for silvered glass mirrors". United States. https://www.osti.gov/servlets/purl/866751.
@article{osti_866751,
title = {Silicon nitride protective coatings for silvered glass mirrors},
author = {Tracy, C Edwin and Benson, David K},
abstractNote = {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 attack 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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}
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