Post on 17-Mar-2018
https://sunypoly.edu/research/nanobio/
Nathaniel C. Cady, PhD
Colleges of Nanoscale Science & Engineering
SUNY Polytechnic Institute
Sumit Kumar Jha, PhD
University of Central Florida
Memristors (RRAM) for Novel, High-density
Memory and Logic
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Memristors / ReRAM / RRAM
Metal-Insulator-Metal device
structure
Memristor = ReRAM = resistive
memory
Memory function based on high
resistance and low resistance states
Resistance states are controlled by
current/voltage history
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Development Mask Layout
Multi Project Wafer (MPW) format:
Die 1
Block A: 1R (0.1 – 10 um), 12 x 12 X-bars
Block B (2x): XOR AES Module, CMOL, 1T1R
…
Die 2
128x128 (16Kbit) X-bar
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Development Images of integrated CMOS-ReRAM
Section 1
Drain
Source
BE (M2)
TE (M1)
TiN/HfOx (OP)
Body
S/D (CA)
Section 2 500 nm
Gate
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Sneak Paths in ReRAM Crossbars
Schematic of a ReRAM Crossbar Array
White: High Resistance, Black-Low Resistance
(4,1) has a sneak path that traverses the resistors (1,1), (1,3)
and (4,3) indicating (4,1) as Low resistance while this is
actually High
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Adder Demonstration
0 0.1 0.2-0.5
0
0.5
1
1.5
2
2.5
3x 10
-4
Voltage( Volts)
Curr
ent
(Am
ps)
A B Cin = 101Sum = 0
Cout = 1
Sum
Cout
1
1
0
Cout = 1 (current)
Sum = 0 (no current)
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Summary & Acknowledgements
Have fabricated 12 x 12 and 128 x 128 x-bar memristor arrays
Have designed a 1-bit adder and verified functionality in x-bar
array
Have designed 2-bit adders & multipliers
Currently testing these designs electrically
Acknowledgements
NSF XPS program
US Air Force Research Labs (6.2 Funding)
US Army (SBIR)
See our poster for more information!!!