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오프 상태 스트레스에 의한 에이징된 P형 Poly-Si TFT에서의 GIDL 전류의 특성
신동기,장경수,박희준,김정수,박중현,이준신,Shin, Donggi,Jang, Kyungsoo,Phu, Nguyen Thi Cam,Park, Heejun,Kim, Jeongsoo,Park, Joonghyun,Yi, Junsin 한국전기전자재료학회 2018 전기전자재료학회논문지 Vol.31 No.6
The effects of off-state bias stress on the characteristics of p-type poly-Si TFT were investigated. To reduce the gate-induced drain leakage (GIDL) current, the off-state bias stress was changed by varying Vgs and Vds. After application of the off-state bias stress, the Vgs causing GIDL current was dramatically increased from 1 to 10 V, and thus, the Vgs margin to turn off the TFT was improved. The on-current and subthreshold swing in the aged TFT was maintained. We performed a technology computer-aided design (TCAD) simulation to describe the aged characteristics. The aged-transfer characteristics were well described by the local charge trapping. The activation energy of the GIDL current was measured for the pristine and aged characteristics. The reduced GIDL current was mainly a thermionic field-emission current.
<i>Drosophila</i> GPCR Han Is a Receptor for the Circadian Clock Neuropeptide PDF
Hyun, Seogang,Lee, Youngseok,Hong, Sung-Tae,Bang, Sunhoe,Paik, Donggi,Kang, Jongkyun,Shin, Jinwhan,Lee, Jaejung,Jeon, Keunhye,Hwang, Seungyoon,Bae, Eunkyung,Kim, Jaeseob Elsevier 2005 Neuron Vol.48 No.2
<P><B>Summary</B></P><P>The pigment-dispersing factor (PDF) is a neuropeptide controlling circadian behavioral rhythms in <I>Drosophila</I>, but its receptor is not yet known. From a large-scale temperature preference behavior screen in <I>Drosophila</I>, we isolated a P insertion mutant that preferred different temperatures during the day and night. This mutation, which we named <I>han</I>, reduced the transcript level of <I>CG13758</I>. We found that Han was expressed specifically in 13 pairs of circadian clock neurons in the adult brain. <I>han</I> null flies showed arrhythmic circadian behavior in constant darkness. The behavioral characteristics of <I>han</I> null mutants were similar to those of <I>pdf</I> null mutants. We also found that PDF binds specifically to S2 cells expressing Han, which results in the elevation of cAMP synthesis. Therefore, we herein propose that Han is a PDF receptor regulating circadian behavioral rhythm through coordination of activities of clock neurons.</P>