Confined defect profiling within resistive random memory access cells

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United States of America Patent

PATENT NO 9269896
SERIAL NO

14519376

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Abstract

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Provided are resistive random access memory (ReRAM) cells and methods of fabricating thereof. A stack including a defect source layer, a defect blocking layer, and a defect acceptor layer disposed between the defect source layer and the defect blocking layer may be subjected to annealing. During the annealing, defects are transferred in a controllable manner from the defect source layer to the defect acceptor layer. At the same time, the defects are not transferred into the defect blocking layer thereby creating a lowest concentration zone within the defect acceptor layer. This zone is responsible for resistive switching. The precise control over the size of the zone and the defect concentration within the zone allows substantially improvement of resistive switching characteristics of the ReRAM cell. In some embodiments, the defect source layer includes aluminum oxynitride, the defect blocking layer includes titanium nitride, and the defect acceptor layer includes aluminum oxide.

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Patent Owner(s)

  • INTERMOLECULAR, INC.;SANDISK TECHNOLOGIES LLC;KABUSHIKI KAISHA TOSHIBA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gopal, Vidyut Sunnyvale, US 47 1325
Hsueh, Chien-Lan Campbell, US 27 562
Wang, Yun San Jose, US 444 6554

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