Invention Grant
- Patent Title: Method and means for operating a complementary analogue reconfigurable memristive resistive switch and use thereof as an artificial synapse
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Application No.: US16092001Application Date: 2017-04-03
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Publication No.: US10388370B2Publication Date: 2019-08-20
- Inventor: Heidemarie Schmidt , Kefeng Li , Ilona Skorupa , Nan Du
- Applicant: Helmholtz-Zentrum Dresden—Rossendorf e.V.
- Applicant Address: DE Dresden
- Assignee: Helmholtz-Zentrum Dresden—Rossendorf e.V.
- Current Assignee: Helmholtz-Zentrum Dresden—Rossendorf e.V.
- Current Assignee Address: DE Dresden
- Agent Michael Soderman
- Priority: DE102016205860 20160407; DE102016209144 20160525
- International Application: PCT/EP2017/057886 WO 20170403
- International Announcement: WO2017/174527 WO 20171012
- Main IPC: G11C13/00
- IPC: G11C13/00 ; G06N3/04 ; G06N3/063 ; H03K19/20 ; G11C11/54 ; H01L45/00

Abstract:
An electronic memristive device that has a complementary analog reconfigurable memristive bidirectional resistive switch. The device has a memristive layer sequence having a BFTO/BFO/BFTO three-ply layer and two electrodes. Titanium traps are arranged in the BFTO interfaces. As a result of mobile acid vacancies, the potential barriers at the interfaces of the electrodes with respect to the memristive layer sequence are in flexible form. By applying voltage pulses, the acid vacancies can be shifted from the interface with respect to the first electrode to the interface with respect to the second electrode, with raising of the potential barrier at one electrode bringing about complementary lowering of the potential barrier of the other electrode. The method for operating the device proposes adapted writing processes that use the overlaying of writing pulse sequences to achieve stipulation of a state pair of complementary resistor states. In conjunction with reading pulses of adapted polarity, the device can implement fuzzy logic and be operated as an artificial synapse with the realization of all four learning curves for complementary learning. A plurality of options for the use of the device are proposed.
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