Three-Dimensional Electro-Thermsl Compact Model for Reset Operation of Phase Change Memories

In this paper, we proposed a phase-change memory (PCM) structure which has a ring confined chalcogenide (RCC) for reducing reset operation current. The temperature distributions of normal bottom contact (NBC), confined chalcogenide (CC) and proposed RCC PCMs were simulated by 3 dimensional finite element method. It was very clear that a much higher temperature can be obtained for RCC than NBC cell at a certain programming current. The programming characteristics also exhibited that the operation current of RCC cell can be as low as about 45% of NBC cell while that of CC cell was about 82% of CC cell.

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Simulation-Based Comparison of Cell Design Concepts for Phase Change Random Access Memory

Journal of Nanoscience and Nanotechnology ◽

10.1166/jnn.2007.18026 ◽

2007 ◽

Vol 7 (1) ◽

pp. 298-305 ◽

Cited By ~ 2

Author(s):

Dae-Hwang Kim ◽

Florian Merget ◽

Michael Först ◽

Heinrich Kurz

Keyword(s):

Phase Change ◽

Three Dimensional ◽

Random Access ◽

Random Access Memory ◽

Access Memory ◽

Design Concepts ◽

Reset Operation ◽

Critical Issues ◽

Dimensional Simulation ◽

Lateral Cell

The RESET operation of different design concepts for phase change random access memory (PCRAM) cell is studied and compared using a three dimensional simulation model. This numerical algorithm comprises four interacting sub-models, which describe the electrical, thermal, phase change, and percolation dynamics in the PCRAM devices during the switching operation. The so-called vertical, confined, and lateral cell geometries are evaluated in terms of their current requirements for RESET operations, which is one of the most critical issues for an achievement of high integration densities. The advantages of the confined and lateral cell architecture as compared to the conventional vertical cell concept are explored, demonstrating their benefits of advanced thermal management and minimized current defined area. The simulation results agree well with experimental features of the RESET operation for the PCRAM design concepts studied.

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Ultra-high temperature graphitization of three-dimensional large-sized graphene aerogel for the encapsulation of phase change materials

Composites Part A Applied Science and Manufacturing ◽

10.1016/j.compositesa.2021.106391 ◽

2021 ◽

pp. 106391

Author(s):

Qing-Qiang Kong ◽

Hui Jia ◽

Li-Jing Xie ◽

Ze-Chao Tao ◽

Xiao Yang ◽

...

Keyword(s):

High Temperature ◽

Phase Change ◽

Phase Change Materials ◽

Three Dimensional ◽

Graphene Aerogel ◽

Ultra High Temperature

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A compact model for Phase Change Memories

2006 International Conference on Simulation of Semiconductor Processes and Devices ◽

10.1109/sispad.2006.282863 ◽

2006 ◽

Cited By ~ 12

Author(s):

P. Fantini ◽

A. Benvenuti ◽

A. Pirovano ◽

F. Pellizzer ◽

D. Ventrice ◽

...

Keyword(s):

Phase Change ◽

Compact Model

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A Robust and Efficient Compact Model for Phase-Change Memory Circuit Simulations

IEEE Transactions on Electron Devices ◽

10.1109/ted.2021.3098656 ◽

2021 ◽

pp. 1-7

Author(s):

Xuhui Chen ◽

Feilong Ding ◽

Xiaoqing Huang ◽

Xinnan Lin ◽

Runsheng Wang ◽

...

Keyword(s):

Phase Change ◽

Phase Change Memory ◽

Compact Model ◽

Memory Circuit ◽

Circuit Simulations ◽

Change Memory

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Three-dimensional computational study in a corrugated pipe inserted system filled with phase change material

International Journal of Numerical Methods for Heat &amp Fluid Flow ◽

10.1108/hff-05-2021-0336 ◽

2021 ◽

Vol ahead-of-print (ahead-of-print) ◽

Author(s):

Ömer Akbal ◽

Hakan F. Öztop ◽

Nidal H. Abu-Hamdeh

Keyword(s):

Phase Change ◽

Phase Change Material ◽

Computational Analysis ◽

Computational Study ◽

Three Dimensional ◽

Simple Algorithm ◽

Melting Time ◽

Geometrical Parameters ◽

Content Type ◽

Change Material

Purpose The purpose of this paper is to make a three-dimensional computational analysis of melting in corrugated pipe inserted system filled with phase change material (PCM). The system was heated from the inner pipe, and temperature of the outer pipe was lower than that of inner pipe. Different geometrical ratio cases and two different temperature differences were tested for their effect on melting time. Design/methodology/approach A computational analysis through a pipe with corrugated pipe filled with PCM is analyzed. Finite volume method was applied with the SIMPLE algorithm method to solve the governing equations. Findings The results indicate that the geometrical parameters can be used to control the melting time inside the heat exchanger which, in turn, affect the energy efficiency. The fastest melting time is seen in Case 4 at the same temperature difference which is the major observation of the current work. Originality/value Originality of this work is to perform a three-dimensional analysis of melting of PCM in a corrugated pipe inserted pipe.

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