[22a-E102-1~8] FS.1 Focused Session "AI Electronics"

▲ [22a-E102-2] High Symmetry and Linearity in Weight Update with GeTe/Sb₂Te₃ Superlattice-like Structure for Artificial Synapse

〇(D)Shinyoung Kang¹, Soo-Min Jin², Tae-Hun Shim², Jea-Gun Park², Yun-Heub Song², Yuji Sutou^1,3 (1.Tohoku Univ. (Eng), 2.Hanyang Univ., 3.Tohoku Univ. (AIMR))

Keywords:Artificial synapse, Interfacial phase change memory, Neuromorphic

Artificial intelligence (AI), which allows us to act and think like humans, has been extensively studied not only in academia but also in society. Therefore, ‘neuromorphic computing’ was introduced that a new computational method that mimics the biological brain. Recently, there are device structural and material efforts for PCM for artificial synaptic applications. Due to the mechanism of PCM, problems such as high current and asymmetrical resistance change to achieve high resistance still exist. To solve this problem, an interfacial phase change memory (iPCM), in which a superlattice-like structure is created by alternately depositing a GeTe thin film and a Sb₂Te₃ thin film, has emerged. We implemented a linear and symmetrical conductance transition based on the unique properties of GeTe/Sb₂Te₃ iPCM deposited by sputtering. This will be of great help in utilizing artificial synapses that constitute neuromorphic computing requiring analog transition.