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Title: 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:
 [1];  [1]
  1. Golden, CO
Publication Date:
Research Org.:
Midwest Research Institute, Kansas City, MO (United States)
OSTI Identifier:
866751
Patent Number(s):
US 4780372
Assignee:
United States of America as represented by United States (Washington, DC)
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 = {},
url = {https://www.osti.gov/biblio/866751}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1988},
month = {1}
}

Patent:

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