期刊
ADVANCED FUNCTIONAL MATERIALS
卷 29, 期 6, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.201806338
关键词
flexible electronics; flexible memory; phase change memory; physical lift-off; Schottky diode
类别
资金
- Wearable Platform Materials Technology Center (WMC) - National Research Foundation of Korea (NRF) Grant of the Korean Government (MSIP) [2016R1A5A1009926]
- Nano Material Technology Development Program through the NRF - Ministry of Science, ICT and Future Planning (MSIP) [2016M3A7B4910636]
- National Science Foundation (NSF) [DMR-1806147]
- NSF [ACI-1053575, ACI-1548562]
- Korea Evaluation Institute of Industrial Technology (KEIT) [한국세라믹기술원출연] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [2016M3A7B4910636] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Inorganic phase change memories (PCMs) have attracted substantial attention as a next-generation storage node, due to their high-level of performance, reliability, and scalability. To integrate the PCM on plastic substrates, the reset power should be minimized to avoid thermal degradation of polymers and adjacent cells. Additionally, flexible phase change random access memory remains unsolved due to the absence of the optimal transfer method and the selection device. Here, an Mo-based interfacial physical lift-off transfer method is introduced to realize a crossbar-structured flexible PCM array, which employs a Schottky diode (SD) selection device and conductive filament PCM storage node. A 32 x 32 parallel array of 1 SD-1 CFPCM, which utilizes a Ni filament as a nanoheater for low power phase transition, is physically exfoliated from the glass substrate at the face-centered cubic/body-centered cubic interface within the sacrificial Mo layer. First principles density functional theory calculations are utilized to understand the mechanism of the Mo-based exfoliation phenomena and the observed metastable Mo phase. The flexible 1 SD-1 CFPCM shows reliable operations (e.g., large resistance ratio of 17, excellent endurance over 100 cycles, and long retention over 10(4) s) with excellent flexibility. Furthermore, the random access operation is confirmed by addressing tests of characters KAIST.
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