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Title Investigation on Phase-change Synapse Devices for More Gradual Switching
Authors Minkyu Shin(Minkyu Shin) ; Kyunghwan Min(Kyunghwan Min) ; Hayeon Shim(Hayeon Shim) ; Yongwoo Kwon(Yongwoo Kwon)
DOI https://doi.org/10.5573/JSTS.2019.19.1.008
Page pp.8-17
ISSN 1598-1657
Keywords Neuromorphic computing ; phasechange ; synapse device ; device simulation ; thermal analysis
Abstract The architecture of phase-change synapses that can have more intermediate states was studied by means of TCAD simulation. After thorough investigation on the cell geometry effects, it was found that the line-and-space type architecture yields more intermediate states but consumes more power than the confined architecture does. In fact, phase-change memory has evolved from the former to the latter to achieve better power efficiency and more abrupt transition. This trade-off between the cell architectures must be overcome to make a synapse with both less power and gradual transition.