Chin. Phys. Lett.  2009, Vol. 26 Issue (11): 118101    DOI: 10.1088/0256-307X/26/11/118101
CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
Simulation of SET Operation in Phase-Change Random Access Memories with Heater Addition and Ring-Type Contactor for Low-Power Consumption by Finite Element Modeling
GONG Yue-Feng1,2, SONG Zhi-Tang1, LING Yun1, LIU Yan, FENG Song-Lin1
1State Key Laboratory of Functional Materials for Informatics, Laboratory of Nanotechnology, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 2000502Graduate School of the Chinese Academic of Sciences, Beijing 100049
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GONG Yue-Feng, SONG Zhi-Tang, LING Yun et al  2009 Chin. Phys. Lett. 26 118101
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Abstract A three-dimensional finite element model for phase change random access memory (PCRAM) is established for comprehensive electrical and thermal analysis during SET operation. The SET behaviours of the heater addition structure (HS) and the ring-type contact in bottom electrode (RIB) structure are compared with each other. There are two ways to reduce the RESET current, applying a high resistivity interfacial layer and building a new device structure. The simulation results indicate that the variation of SET current with different power reduction ways is little. This study takes the RESET and SET operation current into consideration, showing that the RIB structure PCRAM cell is suitable for future devices with high heat efficiency and high-density, due to its high heat efficiency in RESET operation.
Keywords: 81.05.Gc      83.10.Tv      44.10.+i     
Received: 06 April 2009      Published: 30 October 2009
PACS:  81.05.Gc (Amorphous semiconductors)  
  83.10.Tv (Structural and phase changes)  
  44.10.+i (Heat conduction)  
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https://cpl.iphy.ac.cn/10.1088/0256-307X/26/11/118101       OR      https://cpl.iphy.ac.cn/Y2009/V26/I11/118101
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GONG Yue-Feng
SONG Zhi-Tang
LING Yun
LIU Yan
FENG Song-Lin
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