신소재공학과

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1. 일 시 : 2014. 3. 25 (화), 16:00 ~
2. 장 소 : 응용공학동 1층 영상강의실
3. 연 사 : 황 현 상 교수 (포항공과대학교 신소재공학과)
4. 제 목 : ReRAM: Device Technology & Potential Application for Neuromorphic Computing
5. 발표내용요약(Abstract)

  To compete with NAND FLASH technology, we need to develop stackable, cross-point ReRAM device. Although various materials have been reported, it is difficult to meet device criteria such as high speed operation, low power switching, switching uniformity, endurance, long-term retention and selection device for cross-point array. We have investigated various ReRAM devices such as interface switching type (reactive metal/perovskite oxides), filament type (various single layer binary oxides, and bilayer oxides) and PMC type (Cu-doped carbon, Ag-doped oxide). We found that the scaling of device area and film thickness improve device performance. Understanding of switching mechanisms and atomic scale film control are necessary to meet the various requirements for future high density nonvolatile memory devices. To integrate cross-point (4F2) ReRAM device array, we need to develop bi-directional selector device to suppress the sneak current path through the unselected devices. Although various selector candidates were recently reported, several problems such as insufficient current density at set/reset operations for nano-scale devices, low selectivity, and poor endurance have been raised. In this talk, I will report two types of selection devices, called the varistor-type bidirectional switch (VBS) and NbOx based threshold switching device with excellent thermal stability. A highly non-linear VBS showed superior performances including high current density (>3x107A/cm2) and high selectivity (~104). Ultrathin NbO2 exhibits excellent TS characteristics such as high temperature stability (~160oC), good switching uniformity, and extreme scalability. In addition, we also investigated the feasibility of a high speed pattern recognition system using 1k-bit cross-point synaptic ReRAM array. Learning capability of a neuromorphic system comprising ReRAM synapses and CMOS neurons has been confirmed experimentally.


List of Articles
No. Category Subject Author Date Views
Notice Regular 3/26 (화) 장재범 교수 (KAIST 신소재공학과) ADMINI 2019.03.22 2
Notice Regular 3/19 (화) 조양구 박사 (한국표준과학연구원) ADMINI 2019.03.18 7
Notice Regular 3/12 (화) 유창동 교수 (KAIST 전기및전자공학부) ADMINI 2019.03.12 11
Notice Regular 2/26 (화) 김혜영 부회장/창업연구소장 (시니어벤처협회) ADMINI 2019.02.22 42
Notice Special 1/28 (Mon) 이용진 교수 (Shanghai Tech Univ.) ADMINI 2019.01.23 59
Notice Regular 12/4 (Tue) 정두석 교수 (한양대학교 신소재공학부) ADMINI 2018.11.30 143
Notice Regular 11/27 (Tue) 정성준 교수 (숭실대학교 유기신소재 파이버공학과) ADMINI 2018.11.26 131
155 Special 6/26(금) 최재영교수 (성균관대학교) TeamLeader 2015.06.15 1746
154 Special 6/16(화) Kazuo Kondo 박사 (Osaka Prefecture University, Department of Chemical Engineering) TeamLeader 2015.06.15 1624
153 Special 6/12(금) Prof. Mark P. Stoykovich (Department of Chemical and Biological Engineering, University of Colorado) TeamLeader 2015.06.09 1618
152 Regular 6/9(화) 임상혁 교수 (경희대학교 화학공학과) TeamLeader 2015.06.09 1916
151 Special 6/3(수) Prof. Nakasato / 창원대학교 (전, Sumitomo 근무) TeamLeader 2015.05.28 1816
150 Regular 6/2(화) Prof. Christopher Bielawski (UNIST 화학과) TeamLeader 2015.05.28 1633
149 Regular 5/26(화) 박성호 원장 (POSCO 기술연구원) TeamLeader 2015.05.28 1735
148 Regular 5/19(화) 안희준 교수 (한양대학교 유기나노공학과) TeamLeader 2015.05.18 1940
147 Special 5/15(금) Prof. James J. Moon (Univ. of Michigan) file TeamLeader 2015.05.13 1672
146 Regular 5/12(화) 임태원 상무 (현대자동차 중앙연구소) TeamLeader 2015.05.08 1969
145 Regular 4/28(화) 이상윤 전무 (삼성종합기술원) TeamLeader 2015.04.24 1803
144 Special 4/20(월) Prof. Milo Shaffer (Dept. of Chemistry, Imperial College London, The London Centre for Nanotechnology) file TeamLeader 2015.04.15 1673
143 Regular 4/14(화) 문회리 교수 (UNIST, 화학과) TeamLeader 2015.04.08 1791
142 Regular 4/7(화) 이현주 교수 (KAIST 생명화학공학과) TeamLeader 2015.04.01 1899
141 Special 3/25(Wed) Chatr Panithipongwut (Chulalongkorn University) TeamLeader 2015.03.23 1658
140 Regular 3/24(화) 김성웅교수 (성균관대학교 에너지과학과) TeamLeader 2015.03.18 1751
139 Regular 3/17(화) 안성태 교수 (KAIST 기업가정신진흥원) TeamLeader 2015.03.12 1856
138 Regular 3/10(화) 김준경 분원장 (KIST 전북분원 복합소재기술연구소) TeamLeader 2015.03.06 1511
137 3/4 (수) 한봉태 박사 (University of Maryland) file ADMINI 2015.03.04 1208
136 Regular 2015 가을학기 정기세미나 일정 file TeamLeader 2015.03.04 6843
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