scholarly journals Fowler-Nordheim Tunneling Characterization on Poly1-Poly2 Capacitors for the Implementation of Analog Memories in CMOS 0.5 μmTechnology

2014 ◽  
Vol 2014 ◽  
pp. 1-7
Author(s):  
Enrique J. Tinajero-Perez ◽  
Jesus Ezequiel Molinar-Solis ◽  
Rodolfo Z. Garcia-Lozano ◽  
Pedro Rosales-Quintero ◽  
Jose M. Rocha-Perez ◽  
...  
Keyword(s):  
Nonvolatile Memory ◽  
Memory Cell ◽  
Current Mode ◽  
Experimental Results ◽  
Cell Architecture ◽  
Nordheim Tunneling

The experimental results of the Fowler-Nordheim characterization using poly1-poly2 capacitors on CMOS ON Semi 0.5 μm technology are presented. This characterization allows the development, design, and characterization of a new current-mode analog nonvolatile memory. Experimental results of the memory cell architecture are presented and demonstrate the usefulness of the proposed architecture.

Compact model development for a new nonvolatile memory cell architecture

2003 ◽  
Vol 16 (2) ◽  
pp. 215-219
Author(s):  
M. O'Shea ◽  
R. Duane ◽  
D. McCarthy ◽  
K.G. McCarthy ◽  
A. Concannon ◽  
...  
Keyword(s):  
Nonvolatile Memory ◽  
Model Development ◽  
Memory Cell ◽  
Compact Model ◽  
Cell Architecture

scholarly journals Investigation of PVT-Aware STT-MRAM Sensing Circuits for Low-VDD Scenario

Micromachines ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 551
Author(s):  
Zhongjian Bian ◽  
Xiaofeng Hong ◽  
Yanan Guo ◽  
Lirida Naviner ◽  
Wei Ge ◽  
...  
Keyword(s):  
Nonvolatile Memory ◽  
High Speed ◽  
Low Voltage ◽  
Supply Voltage ◽  
Random Access ◽  
Magnetic Tunnel Junction ◽  
Complementary Metal Oxide Semiconductor ◽  
Current Mode ◽  
Cmos Technology ◽  
Oxide Semiconductor

Spintronic based embedded magnetic random access memory (eMRAM) is becoming a foundry validated solution for the next-generation nonvolatile memory applications. The hybrid complementary metal-oxide-semiconductor (CMOS)/magnetic tunnel junction (MTJ) integration has been selected as a proper candidate for energy harvesting, area-constraint and energy-efficiency Internet of Things (IoT) systems-on-chips. Multi-VDD (low supply voltage) techniques were adopted to minimize energy dissipation in MRAM, at the cost of reduced writing/sensing speed and margin. Meanwhile, yield can be severely affected due to variations in process parameters. In this work, we conduct a thorough analysis of MRAM sensing margin and yield. We propose a current-mode sensing amplifier (CSA) named 1D high-sensing 1D margin, high 1D speed and 1D stability (HMSS-SA) with reconfigured reference path and pre-charge transistor. Process-voltage-temperature (PVT) aware analysis is performed based on an MTJ compact model and an industrial 28 nm CMOS technology, explicitly considering low-voltage (0.7 V), low tunneling magnetoresistance (TMR) (50%) and high temperature (85 °C) scenario as the worst sensing case. A case study takes a brief look at sensing circuits, which is applied to in-memory bit-wise computing. Simulation results indicate that the proposed high-sensing margin, high speed and stability sensing-sensing amplifier (HMSS-SA) achieves remarkable performance up to 2.5 GHz sensing frequency. At 0.65 V supply voltage, it can achieve 1 GHz operation frequency with only 0.3% failure rate.

scholarly journals Characterization of Moisture Diffusion in Cured Concrete Slabs at Early Ages

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Xiao Zhang ◽  
Hongduo Zhao
Keyword(s):  
Process Model ◽  
Model Simulation ◽  
Moisture Diffusion ◽  
Experimental Results ◽  
Concrete Slabs ◽  
Model Parameters ◽  
Early Age ◽  
Water Curing ◽  
Early Age Concrete

The objective of this paper is to investigate the characterization of moisture diffusion inside early-age concrete slabs subjected to curing. Time-dependent relative humidity (RH) distributions of three mixture proportions subjected to three different curing methods (i.e., air curing, water curing, and membrane-forming compounds curing) and sealed condition were measured for 28 days. A one-dimensional nonlinear moisture diffusion partial differential equation (PDE) based on Fick’s second law, which incorporates the effect of curing in the Dirichlet boundary condition using a concept of curing factor, is developed to simulate the diffusion process. Model parameters are calibrated by a genetic algorithm (GA). Experimental results show that the RH reducing rate inside concrete under air curing is greater than the rates under membrane-forming compound curing and water curing. It is shown that the effect of water-to-cement (w/c) ratio on self-desiccation is significant. Lower w/c ratio tends to result in larger RH reduction. RH reduction considering both effect of diffusion and self-desiccation in early-age concrete is not sensitive to w/c ratio, but to curing method. Comparison between model simulation and experimental results indicates that the improved model is able to reflect the effect of curing on moisture diffusion in early-age concrete slabs.

Charge storage and data retention characteristics of forming gas-annealed Gd2O3-nanocrystal nonvolatile memory cell

2012 ◽  
Vol 52 (8) ◽  
pp. 1627-1631 ◽  
Author(s):  
Jer-Chyi Wang ◽  
Chih-Ting Lin ◽  
Chi-Hsien Huang ◽  
Chao-Sung Lai ◽  
Chin-Hsiang Liao
Keyword(s):  
Nonvolatile Memory ◽  
Memory Cell ◽  
Charge Storage ◽  
Data Retention ◽  
Retention Characteristics

Experimental Study of Ductile Fracture for Non-Aligned Multiple Flaws in a Plate

2009 ◽  
Author(s):  
Katsumasa Miyazaki ◽  
Kunio Hasegawa ◽  
Koichi Saito ◽  
Bostjan Bezensek
Keyword(s):  
Experimental Study ◽  
Ductile Fracture ◽  
Estimation Procedure ◽  
Maximum Load ◽  
Experimental Results ◽  
Collapse Load ◽  
Plate Specimen ◽  
Fracture Tests ◽  
Almost All

The fitness-for-service code requires the characterization of non-aligned multiple flaws for the flaw evaluation, which is performed using a flaw proximity rule. Worldwide almost all codes provide own proximity rule, often with unclear technical bases of the application of proximity rule to ductile fracture. To clarify the appropriate proximity rule for non-aligned multiple flaws in fully plastic fracture, fracture tests on flat plate specimen with non-aligned multiple through wall flaws were conducted at ambient temperature. The emphasis of this study was put on the flaw alignment rule, which determines whether non-aligned flaws are treated as independent or aligned onto the same plane for the purpose of flaw evaluations. The effects of the flaw separation and flaw size on the maximum load were investigated. The experimental results were compared with the estimations of the collapse load using the alignment rules in the ASME Section XI, BS7910 and API 579-1 codes. A new estimation procedure specific to the fully plastic fracture was proposed and compared with the comparison with the experimental results.

Spatial and Temporal Characterization of Programming Charge in SONOS Memory Cell: Effects of Localized Electron Trapping

2004 ◽  
Vol 43 (No. 12B) ◽  
pp. L1581-L1583 ◽  
Author(s):  
Bomsoo Kim ◽  
Chang-Ki Baek ◽  
Wookhyun Kwon ◽  
Jawoong Lee ◽  
Yoon-Ha Jeong ◽  
...  
Keyword(s):  
Memory Cell ◽  
Electron Trapping

Fabrication and characterization of a magnetoelectric memory cell of 50Ba(Zr0.2Ti0.8)O3–50Ba0.7Ca0.3TiO3/Fe70Ga30

2016 ◽  
Vol 170 ◽  
pp. 192-195 ◽  
Author(s):  
Yemei Han ◽  
Zhichao Zhang ◽  
Fang Wang ◽  
Wei Mi ◽  
Kailiang Zhang
Keyword(s):  
Memory Cell ◽  
Fabrication And Characterization
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