Stoichiometry for chalcogenide glasses useful for memory devices and method of formation
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United States of America Patent
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May 3, 2005
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app pub date -
Jun 26, 2003
filing date -
Aug 30, 2001
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Abstract
A method of forming resistance changing elements with improved operational characteristics for use in memory devices and the resulting structures are disclosed. A chalcogenide glass having the formula (Gex1Se1-x1)1-y1Agy1, wherein 18≦x1≦28, or the formula (Gex2Se1-x2)1-y2Agy2, wherein 39≦x2≦42, and wherein in both the silver is in a concentration which maintains the germanium selenide glass in the glass forming region is used in a memory cell. The glass may also have a glass transition temperature (Tg) near or higher than typical temperatures used for fabricating and packaging memory devices containing the memory cell.
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