[Research] Prof. Joohoon Kang’s research team develops Ternary operator applying area-selective chemical doping
- 신소재공학부
- Hit1511
- 2022-01-26
Prof. Joohoon Kang’s research team develops Ternary operator applying area-selective chemical doping
- State-of-the-art semiconductor system which overcomes limitations of binary logic
[Image] Dr. Dongjoon Rhee, Prof. Joohoon Kang, Master's candidate Myeongjin Jung, and Ph.D. Candidate Jihyun Kim (Clockwise from the left)
Prof. Joohoon Kang’s research team (First authors; Jihyun Kim & Myeongjin Jung) developed a cutting-edge semiconductor device that enables ternary operation.
Lately, the increasing demand for AI, self-driving, and IoT, the core technology of the 4th industrial revolution, has urged the need for large-scale information processing technologies and the development of high-performance semiconductors.
Binary-based semiconductor devices that process information with 0 and 1 have physical limits to improve the integration. Therefore, multiple-valued logic systems have been suggested as an alternative to meet conditions such as shorter information processing time, higher performance, and lower power consumption.
A conventional multiple-valued logic system was fabricated by forming two or more threshold voltages through combining semiconductor materials with heterogeneous work function values. However, there have been challenges in enlarging it due to low productivity when combining heterogeneous materials elaborately.
[figure] Schematic of the system structure
To cope with this, the research team developed multi-valued logic gates by forming large-area elemental semiconductor material film with solution processing method. Through area-selective chemical treatment, the team formulated regions with different work function on two-dimensional MoS2, the next-generation semiconductor material, and sequentially operated them to process ternary logical systems with stability. In addition, the team confirmed that various logical operations for large-scale information processing are also stably driven using the ternary device.
“I expect the system to be applied in the semiconductor industry in the near future, in that the developed structure enables fabrication of large-area multiple-valued logic devices in wafer units without major changes in the conventional process.” Prof. Kang added.
The team plans to design the optimum semiconductor material compound and apply this technology to subsequent multiple-valued logic studies to surpass the ternary logic system.
This study was supported by National Research Foundation of Korea (NRF) grants funded by the Korean Government (MSIT) (2020R1C1C1009381 and 2020R1A4A2002806) and the Korea Basic Science Institute (KBSI) National Research Facilities and Equipment Center (NFEC) grant funded by the Korean Government (Ministry of Education) (2019R1A6C1010031).
※ Paper: Area-Selective Chemical Doping on Solution-Processed MoS2 Thin-Film for Multi-Valued Logic Gates
https://www.skku.edu/skku/campus/skk_comm/news.do?mode=view&articleNo=94442&article.offset=0&articleLimit=10