Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Decrease of Interface Trap Density of Deposited Tunneling Layer Using CO2 Gas and Characteristics of Non-volatile Memory for Low Power Consumption

CO2가스를 이용하여 증착된 터널층의 계면포획밀도의 감소와 이를 적용한 저전력비휘발성 메모리 특성

  • Lee, Sojin (Department of Electronic Electrical Computer Engineering, Sungkyunkwan University) ;
  • Jang, Kyungsoo (Department of Electronic Electrical Computer Engineering, Sungkyunkwan University) ;
  • Nguyen, Cam Phu Thi (Department of Electronic Electrical Computer Engineering, Sungkyunkwan University) ;
  • Kim, Taeyong (Department of Electronic Electrical Computer Engineering, Sungkyunkwan University) ;
  • Yi, Junsin (Department of Electronic Electrical Computer Engineering, Sungkyunkwan University)
  • 이소진 (성균관대학교 전자전기컴퓨터공학과) ;
  • 장경수 (성균관대학교 전자전기컴퓨터공학과) ;
  • ;
  • 김태용 (성균관대학교 전자전기컴퓨터공학과) ;
  • 이준신 (성균관대학교 전자전기컴퓨터공학과)
  • Received : 2016.04.04
  • Accepted : 2016.06.21
  • Published : 2016.07.01
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Abstract

The silicon dioxide ($SiO_2$) was deposited using various gas as oxygen and nitrous oxide ($N_2O$) in nowadays. In order to improve electrical characteristics and the interface state density ($D_{it}$) in low temperature, It was deposited with carbon dioxide ($CO_2$) and silane ($SiH_4$) gas by inductively coupled plasma chemical vapor deposition (ICP-CVD). Each $D_{it}$ of $SiO_2$ using $CO_2$ and $N_2O$ gas was $1.30{\times}10^{10}cm^{-2}{\cdot}eV^{-1}$ and $3.31{\times}10^{10}cm^{-2}{\cdot}eV^{-1}$. It showed $SiO_2$ using $CO_2$ gas was about 2.55 times better than $N_2O$ gas. After 10 years when the thin film was applied to metal/insulator/semiconductor(MIS)-nonvolatile memory(NVM), MIS NVM using $SiO_2$($CO_2$) on tunneling layer had window memory of 2.16 V with 60% retention at bias voltage from +16 V to -19 V. However, MIS NVM applied $SiO_2$($N_2O$) to tunneling layer had 2.48 V with 61% retention at bias voltage from +20 V to -24 V. The results show $SiO_2$ using $CO_2$ decrease the $D_{it}$ and it improves the operating voltage.

Keywords

References

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