Phase change memory cells with dual access devices

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United States of America Patent

PATENT NO 7863655
SERIAL NO

11552487

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Abstract

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A self aligning memory device, with a memory element switchable between electrical property states by the application of energy, includes a substrate and word lines, at least the sides of the word lines covered with a dielectric material which defines gaps. An access device within a substrate has a first terminal under a second gap and second terminals under first and third gaps. First and second source lines are in the first and third gaps and are electrically connected to the second terminals. A first electrode in the second gap is electrically connected to the first terminal. A memory element in the second gap is positioned over and electrically connected to the first electrode. A second electrode is positioned over and contacts the memory element. The first contact, the first electrode, the memory element and the second electrode are self aligning. A portion of the memory element may have a sub lithographically dimensioned width.

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Patent Owner(s)

  • MACRONIX INTERNATIONAL CO., LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lung, Hsiang-Lan Elmsford, US 306 9494

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