11 research outputs found
์ ๊ธฐํํฉ๋ฌผ ์๋ฃ๋ฌผ์ง์ ์ด์ฉํ 6H-SiC ๋์ข ๋จ๊ฒฐ์ ๋ฐ๋ง์ฑ์ฅ์ ๋ํ ์ฐ๊ตฌ
ํ์๋
ผ๋ฌธ(์์ฌ)--์์ธ๋ํ๊ต ๋ํ์ :๋ฌด๊ธฐ์ฌ๋ฃ๊ณตํ๊ณผ,1999.Maste
Ca-Doped CuO Diffusion Barrier for High-Performance a-IGZO Transistors With Cu-Based Source/Drain Material
A thermally stable Ca-doped CuOx (CuCaOx) diffusion barrier to prevent the migration of Cu to amorphous InGaZnO (a-IGZO) was developed by reactive sputtering and subsequent annealing. Insertion of a 5-nm-thick CaCuOx between the Ca-dopedCu (CuCa) and a-IGZO channel films in the source/drain contact regions provided the resulting transistors with superior charge transport and lower trap density compared to the diffusion barrier-free CuCa/a-IGZO transistors. The fabricated a-IGZO transistors with the CuCa/CuCaOx stack contact exhibited a high mobility of 20.8 cm(2)/V.s and an Ion/off ratio of 108. Simultaneously, very stable behavior against the external positive/negate gate bias stress was observed for the a-IGZO thin-film transistors with the CuCa/CuCaOx stack contact. This was attributed to suppression of Cu-related acceptor-like traps due to the conformal formation of CuCaOx film with excellent barrier properties.This work was supported in part by the Industrial Strategic Technology Development Program funded by the Ministry of Knowledge Economy/Ministry of Energy, Industry and Trade under Grant 10048560 and in part by the National Research Foundation of Korea funded by the Korean Government under Grant NRF-2015R1A2A2A01003848
Achieving High Mobility in IGTO Thin-Film Transistors at a Low Temperature via Film Densification
The effects of chamber pressure (P-C) on the structural and chemical properties of an indium gallium tin oxide (IGTO) channel layer were examined. Smoother and denser IGTO films were obtained with decreasing P-C, which were explained based on the enhanced kinetic energy of sputtered particles due to fewer collisions with the plasma atmosphere. The resulting IGTO thin-film transistor exhibited a high mobility of 35.0 cm(2)/Vs, subthreshold gate swing of 0.17 V/decade, threshold voltage (V-TH) of -0.45 V, and I-ON/OFF ratio >10(8), even at a low annealing temperature of 150 degrees C.This work was supported in part by Samsung Display and in part by MKE/KEIT through the Industrial Strategic Technology Development Program under Grant 10079974
Asymmetric formal syntheses of (+)-Carbacyclin and (+)-Brefeldin A via Stereoselective construction of cis-Disubstituted Hydroxycyclopentane
ํ์๋
ผ๋ฌธ(๋ฐ์ฌ)--์์ธ๋ํ๊ต ๋ํ์ :์ฝํ๊ณผ ์ฝํ์ ์กฐํํ์ ๊ณต,1999.Docto
Characterization of Drosophila synaptotagmin4 gene during embryogenesis
ํ์๋
ผ๋ฌธ (์์ฌ)-- ์์ธ๋ํ๊ต ๋ํ์ : ๊ณผํ๊ต์ก๊ณผ(์๋ฌผ์ ๊ณต), 2012. 2. ์ ์ํ.์ ๊ฒฝ๊ณ์ ๋ฐ์์ ์ฌ๋ฌ ์ ์ ์ธ์๋ค์ ์ํด ์ ๊ตํ๊ฒ ๋ค๋ฌ์ด์ง๊ณ ์กฐ์ ๋๋ ๊ณผ์ ์ ๊ฑฐ์น๋ค. ์ด๊ธฐ์ ๋๋ ๊ตฌ๋ฐฐ๊ณผ์ ๋ถํฐ ๊ฐ ์ ์ ์๋ ์๋ก๋ฅผ ํ์ฑํ์ํค๊ฑฐ๋ ์ต์ ํจ์ผ๋ก์จ ์ ๊ฒฝ์ ๊ตฌ์ธํฌ์ ์ด๋ช
์ ๊ฒฐ์ ํ๊ฒ ๋๋ฉฐ, ์ฐ์์ ์ธ ๋๋ ๊ตฌ๋ฐฐ๋ก ์ธํด ์ด ์ ๊ฒฝ ์ ๊ตฌ์ธํฌ์ ์ต์ข
์ ์ธ ๋ถํ๊น์ง ์ฐ์์ ๊ณผ์ ์ผ๋ก ์ผ์ด๋๊ฒ ๋๋ค. ์ด๋ฌํ ์ ๊ฒฝ๊ณ์ ์ ์์ ์ธ ๋ฐ์๊ณผ์ ์์ ํนํ ์ ๊ฒฝ๊ณผ ์ ๊ฒฝ๊ต์ธํฌ์ ์ํธ์์ฉ์ ์ ๊ฒฝ์ธํฌ์ ์ด๋ช
์ ๊ฒฐ์ ํ๋ ์ผ๋ถํฐ ๋ถ์ด์ด๋ ์ด๋, ๋ถํ์ ์ด๋ฅด๊ธฐ๊น์ง ๋ง์ ์ํฅ์ ๋ฏธ์น๋ ๊ฒ์ผ๋ก ์๋ ค์ ธ ์๋ค. ์ ๊ฒฝ๊ต์ธํฌ๋ ์ฒ์ ์๋ ค์ง ๋ฐ์ ๋ฌ๋ฆฌ ์ ๊ฒฝ์ ๋ณด์กฐํ๋ ์ญํ ๋ฟ๋ง ์๋๋ผ ์ ๊ฒฝ์ ์์กด ๋ฐ ๊ธฐ๋ฅ์ ์ค๋ํ ์ญํ ์ ์ํํ๋ฉฐ, ๋ฐ์ ์ด๊ธฐ๋ฟ๋ง ์๋๋ผ ํ๊ธฐ๊น์ง๋ ์ ๊ฒฝ๊ณผ ์ํธ์์ฉํ๋ ๊ฒ์ผ๋ก ๋ฐํ์ก๋ค. ์ด ๋์ ์ํธ์์ฉ์ ์ํฅ์ ๋ฏธ์น ๊ฒ์ผ๋ก ์์๋๋ syt4 ์ ์ ์๊ฐ ์ดํ๋ฆฌ์ ๋ฐฐ์ ์๊ธฐ ์ ๊ฒฝ ๋ฐ์์ ์ด๋ค ์ํฅ์ ๋ฏธ์น๋ ์ง ์์๋ณด๊ณ ์ ๋ณธ ์ฐ๊ตฌ๋ฅผ ์คํํ์๋ค. ์ด ์ ์ ์๋ synaptotagmin family์ ์ผ์์ผ๋ก ๋๊ฐ์ C2 domain๊ณผ transmembrane domain์ ๊ฐ์ง๋ ๋จ๋ฐฑ์ง ๊ตฌ์กฐ์ post synapse์์ ๋ถ๋น๊ณผ์ ์ ๊ด์ฌํ ๊ฒ์ผ๋ก ์์๋๋ ์ ์ ์์ด๋ค. ๋ณธ ์ฐ๊ตฌ์์๋ ์ด ์ ์ ์๊ฐ ๋ฐฐ์์๊ธฐ์ ์ด๋ ํ ์ญํ ์ ํ๋์ง ์์๋ณด๊ณ ์ ํ์๋ค. ์ด ์ ์ ์๋ ์ ๊ฒฝ์์ ๋ฐํํ์ง๋ง Syt4๋จ๋ฐฑ์ง์ ๊ฒฝ์ฐ์ ์ ๊ฒฝ์ธํฌ ๋ณด๋ค๋ ์ ๊ฒฝ๊ต์ธํฌ๋ ๊ทผ์ก์ ๋ ์ธ์ ํ์ฌ ์์ฉํ๋ค๋ ๊ฒ์ ํ์ธํ์๋ค. ๋ํ ์ด ์ ์ ์๊ฐ ์์ค๋๋ ๋์ฐ๋ณ์ด์ ๊ฒฝ์ฐ ์ ๊ฒฝ์ธํฌ์ ์ถ์๋๊ธฐ๊ฐ ๋ง์ง๋ง ๋ชฉ์ ์ง๊น์ง ๋๋ฌํ์ง ๋ชปํ๋ ๊ฒฐ๊ณผ๋ฅผ ๊ด์ฐฐํ ์ ์์์ผ๋ฉฐ, ๊ณผ๋๋ฐํ๋ ๋์ฐ๋ณ์ด์์๋ ๊ณผํ๊ฒ ์๋ผ๋ ๊ฐ์ง๋ฅผ ๋ป์ด๋๊ฐ๋ ๋ชจ์ต์ ๊ด์ฐฐํ ์ ์์๋ค. ์ด๋ฌํ ๊ฒฐ๊ณผ๋ก syt4์ ์ ์๋ ์ดํ๋ฆฌ ๋ฐฐ์ ์ ๊ฒฝ๊ณ ํ๊ธฐ ๋ฐ์์ ์ ๊ฒฝ์ด ๋ง์ง๋ง ๋ชฉ์ ์ง๋ก ๋๋ฌํ๋๋ฐ ์ํฅ์ ์ฃผ๋ ๊ฒ์ผ๋ก ์๊ฐ๋๋ค.Complex networks between the presynaptic and postsynaptic cells determine synapses. A variety of molecules are required from the presynaptic and postsynaptic cells for proper synapses. synaptotagmin4(syt4) has been known as a calcium sensor and axonal growth during postembryogenesis. Syt4 is one of synaptotagmin family that has two C2 domains and one transmembrane domain. In this study, we investigated the roles of Syt4 during the process of embryonic axonal growth. We found that syt4 loss-of-function mutation caused the abnormal fasciculation in the ventral nerve cord and ISN axons didnt reach the target muscles. The ectopic expression of syt4 in the presynaptic cells overgrew beyond the target muscle and extra branches of ISN. These results indicate that syt4 function in the axonal targeting during embryogenesis.Maste
๊ณ ์จ ๊ณ ์ ์กฐ๊ฑด์์ Dimethyl-Ether์ ๋ถ๋ฌด ํน์ฑ์ ๊ดํ ์ฐ๊ตฌ
ํ์๋
ผ๋ฌธ(์์ฌ)--์์ธ๋ํ๊ต ๋ํ์ :๊ธฐ๊ณํญ๊ณต๊ณตํ๋ถ,2003.Maste
Homoepitaxial growth and in-situ doping of monocrystalline alpha-SiC thin films by MOCVD for power device applications
Thesis (doctoral)--์์ธ๋ํ๊ต ๋ํ์ :์ฌ๋ฃ๊ณตํ๋ถ,2002.Docto