대한전자공학회논문지SD (Journal of the Institute of Electronics Engineers of Korea SD)

대한전자공학회 (The Institute of Electronics and Information Engineers)
권호 표지

단 채널 GaAs MESFET의 속도 포화영역에서 2차원 전위 도출을 위한 해석적 모델

An analytical model for deriving the 2-D potential in the velocity saturation region of a short channel GaAs MESFET

  • 오영해 (홍익대학교 전자전기공학부) ;
  • 장은성 (홍익대학교 전자전기공학부) ;
  • 양진석 (홍익대학교 전자전기공학부) ;
  • 최수홍 (홍익대학교 전자전기공학부) ;
  • 갈진하 (홍익대학교 전자전기공학부) ;
  • 한원진 (홍익대학교 전자전기공학부) ;
  • 홍순석 (홍익대학교 전자전기공학과 전자공학)
  • Oh, Young-Hae (School of Electronic & Electrical Eng., Hongik Univ.) ;
  • Jang, Eun-Sung (School of Electronic & Electrical Eng., Hongik Univ.) ;
  • Yang, Jin-Seok (School of Electronic & Electrical Eng., Hongik Univ.) ;
  • Choi, Soo-Hong (School of Electronic & Electrical Eng., Hongik Univ.) ;
  • Kal, Jin-Ha (School of Electronic & Electrical Eng., Hongik Univ.) ;
  • Han, Won-Jin (School of Electronic & Electrical Eng., Hongik Univ.) ;
  • Hong, Sun-Suck (Dep. of Electronic & Electrical Eng., Hongik Univ.)
  • 발행 : 2008.11.25
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초록

본 논문에서는 단 채널 GaAs MESFET의 포화영역에서의 I-V 특성을 도출하기 위한 해석적 모델을 제안하였다. 기존의 단 채널 GaAs MESFET에 대한 해석이 채널 pinch-off의 개념이 도입되는 모델이었던 반면, 본 논문에서는 저자의 소도 포화 영역이 유한한 채널 폭을 갖으면서 전류 연속 조건을 만족하도록 공핍영역의 2차원 전위 분포 식을 도출하였다. 또한 소도 포화영역의 길이를 채널 전체 길이, 채널 도핑 농도, 게이트 전압 및 드레인 전압의 함수로 도출하여 포화영역에서의 Early 효과를 보다 합리적으로 설명할 수 있음을 보이고 있다.

In this paper, we suggest an analytical model that can derive the I-V characteristics in the saturation region of a short channel GaAs MESFET. Instead of the pinch-off concept that has been used in the conventional models we can derive the two-dimensional potential in the depletion region in order that the velocity saturation region cannot be pinched-off and the current continuity condition can be satisfied. Obtained expression for the velocity saturation length is expressed in terms of the total channel length, channel doping density, gate voltage, and drain voltage. Compared with the conventional channel length shortening models, the present model seems to be considerably accurate and more reasonable in explaining the Early effect.

키워드

참고문헌

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