Coated article with ion treated underlayer and corresponding method
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United States of America Patent
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Apr 3, 2012
Grant Date -
Sep 10, 2009
app pub date -
May 18, 2009
filing date -
Jun 25, 2004
priority date (Note) -
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Abstract
A coated article is provided that may be used as a vehicle windshield, insulating glass (IG) window unit, or the like. Ion beam treatment is performed on a layer(s) of the coating. For example, a silicon nitride layer of a low-E coating may be ion beam treated. It has been found that ion beam treatment, for example, of a silicon nitride underlayer is advantageous in that sodium migration from the glass substrate toward the IR reflecting layer(s) can be reduced during heat treatment.
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