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1. (WO2017151628) SELF-POWERED SENSORS FOR LONG-TERM MONITORING

Pub. No.:    WO/2017/151628    International Application No.:    PCT/US2017/019967
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Wed Mar 01 00:59:59 CET 2017
IPC: H01L 33/04
Applicants: WASHINGTON UNIVERSITY
Inventors: CHAKRABARTTY, Shantanu
ZHOU, Liang
Title: SELF-POWERED SENSORS FOR LONG-TERM MONITORING
Abstract:
A sensor system for detecting events is provided. The sensor system includes a sensor and a read-out interface. The sensor includes a transducer and a memory device. The transducer detects an event and generates a sensor signal in response to the event. The memory device includes a floating-gate with a sensing interface coupled to the transducer. The sensing interface has an energy barrier that leaks electrons at a predetermined electron leakage rate through Fowler-Nordheim (F-N) tunneling. The sensor signal alters a geometry of the energy barrier to change the electron leakage rate. The read-out interface is communicatively coupled to the memory device and retrieves data stored on the memory device for analysis. The event and a timestamp of the event are identifiable from the stored data.