Layered resistance variable memory device and method of fabrication
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United States of America Patent
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Aug 8, 2006
Grant Date -
Sep 30, 2004
app pub date -
Apr 7, 2004
filing date -
Feb 20, 2002
priority date (Note) -
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Abstract
The invention is related to methods and apparatus for providing a resistance variable memory element with improved data retention and switching characteristics. According to one embodiment of the invention, a resistance variable memory element is provided having at least one silver-selenide layer in between two glass layers, wherein at least one of the glass layers is a chalcogenide glass, preferably having a Ge.sub.xSe.sub.100-x composition. According to another embodiment of the invention, a resistance variable memory element is provided having at least one silver-selenide layer in between chalcogenide glass layers and further having a silver layer above at least one of said chalcogenide glass layers and a conductive adhesion layer above said silver layer. According to the another embodiment of the invention, a resistance variable memory element is provided having a first chalcogenide glass layer, a silver layer over said chalcogenide glass layer, a second chalcogenide glass layer over said silver layer, a second silver layer over said second chalcogenide glass layer, and a conductive adhesion layer over said a second silver layer.
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