Magnesium oxide-containing barrier layer for thick dielectric electroluminescent displays
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United States of America Patent
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Mar 29, 2011
Grant Date -
Nov 9, 2006
app pub date -
Apr 13, 2006
filing date -
Apr 15, 2005
priority date (Note) -
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Abstract
A novel laminate is provided to improve the operating stability of thioaluminate based phosphors used in ac thick film dielectric electroluminescent displays. The novel structure comprises a rare earth activated alkaline earth thioaluminate phosphor thin film layer and a magnesium oxide or magnesium oxide containing layer provided directly adjacent and in contact with the bottom of the phosphor thin film layer. The invention is particularly applicable to phosphors used in electroluminescent displays that employ thick dielectric layers subject to high processing temperatures to form and activate the phosphor films.
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