http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
전정식(J. S. Jeon),문종(J. Moon),이상인(S. I. Lee),심태언(T. E. Shim),황정남(J. N. Hwang) 한국진공학회(ASCT) 1996 Applied Science and Convergence Technology Vol.5 No.3
기판온도 약 500℃, 진공도 ~10^(-5) Torr에서 이온화된 cluster 빔 증착(ICBD)법으로 Y₂O₃ 박막을 Si(100) 위에 제조하였다. Si의 산화를 억제하기 위해서 얇은 층의 Yttrium막을 형성한후 산소와 Yttrium 원소를 반응증착시켰다. 증착한 상태의 X-선 회절분석에서 b.c. c 및 h.c. p 구조의 Y₂O₃가 관찰되었다. 제한시야 (selected area diffractin:SAD) pattern 분석에서 spot과 ring pattern들이 관찰되었는데 증착중에 결정형성 및 결정성장이 일어났음을 알 수 있었다. 고분해 투과전자현미경(hgih resolution transmition electron microscopy : HRTEM) image에서 Y₂O₃/mixed layer/SiO₂=170Å/50Å/10Å의 구조가 관찰되었으며 비정질상인 SiO₂의 형성에 대해 검토하였다. 증착된 Y₂O₃의 전기적 특성은 Pt/Y₂O₃/Si 구조에서 누설전류 밀도는 10^(-6) A/㎠ 이하로 나타났으며, breakdown 강도는 7㎹/㎝로 나타났다. Y₂O₃ thin film on Si(100) was successfully grown by ionized cluster beam (ICBD) technique at substrate temperature of around 500℃ and pressure of ~10^(-5) Torr. To prevent the oxygen and yttrium source. In as-deposited state, b. c. c and h. c. p structures of Y₂O₃ were observed from X-ray analysis. from the observation of spots and ring pattems in selected area diffractin(SAD) patterns, crystallane formation and growth could be proceeded during the deposition. Y₂O₃/mixed layer/SiO₂=170Å/50Å/10Å structure were verified by high resolution transmition electron imcroscopy (HRTEM) image, and the formation of amorphous layer of SiO₂ was discussed. Electrical charateristics of the film were also investigated. In as-deposited Pt/Y₂O₃/Si structure, leakage current was less than 10^(-6) A/㎠ at 7 ㎹/㎝ strength.
이상익(S.I Lee),유재근(J.G Yoo),전정채(J.C Jeon),전현재(H.J Jeon),허혜성(H.S Heo),최규하(G.H Choe) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
Recently the harmonic generation has deteriorated the quality of electricity and affected the performance on the electrical installation including personal computer, fax, community devices and so on. Some studies of harmonic affects in diagnosis and the cause of accident has not done by the experimental data of harmonic source but merely by presumption according to qualitative analysis. So, in order to research the harmonic affect on the electrical installation according to quantitative analysis and gather reliable data over and over again, it is necessary to develop an Harmonic power source which is capable of generating some harmonics. In this paper, we described about realization of Harmonic power source control module which can produce and added harmonics for the analysis due to harmonic effects.
이상익(S.I Lee),유재근(J.G Yoo),전정채(J.C Jeon),전현재(H.J Jeon),허혜성(H.S Heo),최규하(G.H Choe) 전력전자학회 2007 전력전자학술대회 논문집 Vol.- No.-
This paper presented a actual conditions on a false-tripping of ELB(Earth Leakage Breakers) and an assessment of the harmonics due to non-linear electronic equipment such as personal computers, rectifier, electric furnace and test equipments in plant installations. Actual conditions on a failure of ELB were surveyed and analyzed by making up a question to safety managers of plant installations. Also, power quality measurements such as harmonic currents, voltage and current waveform and current imbalance were made at various plant installations where nuisance tripping of ELB is often occurred. The results of this study can be used in making decisions regarding cause of ELB trip and operating and tripping characteristics test of ELB when subjected to distorted current waveform.
박용외판재의 두께에 따른 용접부의 잔류응력에 관한 고찰
장석기,전정일,김상진,한민수 木浦海洋大學校 2002 論文集 Vol.10 No.1
The present shows residual stress distribution curves on weldment of various thickness of steel plates for vessel using X-ray diffraction powder Fe method. This research is reported that different thickness of specimens and welding conditions had effect on residual stress distribution of weldment on surface and cross section of specimens