Compact electrical switching devices with nanotube elements, and methods of making same
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United States of America Patent
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Jul 17, 2012
Grant Date -
Jun 30, 2011
app pub date -
Dec 31, 2009
filing date -
Dec 31, 2009
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Abstract
An electrical device includes a substrate; first and second active areas; first and second word lines disposed in a first plane; first and second bit lines in a second plane and in electrical communication with first and second active areas; and a reference line disposed in a third plane. A nanotube element disposed in a fourth plane is in electrical communication with first and second active areas and the reference line via electrical connections at a first surface of the nanotube element. The nanotube element includes first and second regions having resistance states that are independently adjustable in response to electrical stimuli, wherein the first and second regions nonvolatilely retain the resistance states. Arrays of such electrical devices can be formed as nonvolatile memory devices. Methods for fabricating such devices are also disclosed.
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