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논문 : GaN계 수직형 발광 다이오드를 위한 N-face n-GaN의 인듐계 저저항 오믹접촉 연구
강기만 ( Ki Man Kang ),박민주 ( Min Joo Park ),곽준섭 ( Joon Seop Kwak ),김현수 ( Hyun Soo Kim ),권광우 ( Kwang Woo Kwon ),김영호 ( Young Ho Kim ) 대한금속재료학회 ( 구 대한금속학회 ) 2010 대한금속·재료학회지 Vol.48 No.5
We investigated the In-based ohmic contacts on Nitrogen-face (N-face) n-type GaN, as well as Gaface n-type GaN, for InGaN-based vertical Light Emitting Diodes (LEDs). For this purpose, we fabricated Circular Transfer Length Method (CTLM) patterns on the N-face n-GaN that were prepared by using a laserlift off method, as well as on the Ga-face n-GaN that were prepared by using a dry etching method. Then, In/transparent conducting oxide (TCO) and In/TiW schemes were deposited on the CTLM in order for low resistance ohmic contacts to form. The In/TCO scheme on the Ga-face n-GaN showed high specific contact resistance, while the minimum specific contact resistance was only 3×10(-2) Ω-cm2 after annealing at 300℃, which can be attributed to the high sheet resistance of the TCO layer. In contrast, the In/TiW scheme on the Ga-face n-GaN produced low specific contact resistance of 2.1×10(5) Ω-cm2 after annealing at 500℃ for 1 min. In addition, the In/TiW scheme on the N-face n-GaN also resulted in a low specific contact resistance of 2.2×10(-4) Ω-cm2 after annealing at 300℃. These results suggest that both the Ga-face n-GaN and N-face n-GaN.
유경 나사를 이용한 견갑골 관절와 횡골절의 관절경적 정복 밑 내고정
노규철,유정한,강기만,Noh Kyu Cheol,Yoo Jung Han,Kang Ki Man 대한정형외과스포츠의학회 2003 대한정형외과스포츠의학회지 Vol.2 No.2
저 자들은 관절와의 전위 된 횡골절에 대해 관절경 을 이 용하여 골절된 관절면을 확인하면서 골절의 정복을 유지 하고, 견관절경술식에 일 반적으로 사용되는 견봉 바로 외측에 위 치 한 외 측 삽입 구나 또는 견갑상와의 상부 삽입구 (Nevlaser porial)에서 피부를 통해 직경4 mm 타이타늄 유관 해면골 나사를 이 용하여 고정하였다. 관절경을 이 용한 골절 내고정술은 좋은 시 야를 확보할 수 있었고, 최소 침습 수술이므로 작은 연부조직 절개 , 적은 출혈량, 수술후 재활 기간의 단축 및 조기 관절 운동 힌용 등의 여러 장점 을 가지므로 이에 수술 방법과 증례를 보고하는 바이다 We describe in this report the accurate reduction of a transverse displaced glenoid fracture through arthroscopic control . We used the lateral and superior (Neviaser portal) portal of the arthroscopic surgery in the shoulder joint for the U 4.0-mm titanium cannulated cancellous screw fixation. The advantages of this treatment are excellent intra-articular visualiBation, decreased soft tissue dissection ,less blood loss, shortened postoperative recovery and early ROM exercise. There(ore, we report the method of operation and the cases .
Danis-Weber B형 족근 관절 골절에 있어 유경 나사를 이용한 비골 외 과 골절의 치료
박용욱,정영기,유정한,박홍준,유선오,강기만,Park, Yong-Wook,Chung, Yung-Khee,Yoo, Jung-Han,Park, Hong-Jun,Yu, Sun-O,Kang, Ki-Man 대한족부족관절학회 2001 대한족부족관절학회지 Vol.5 No.2
Purpose: To evaluate the radiographic results of the treatment for Danis-Weber type B lateral malleolar fracture with 2 cannulated screws. Materials and Methods: Thirty-four cases of Danis-Weber type B lateral malleolar fracture were available. Follow-up averaged 8 months (6-25 months). The medial clear space for lateral displacement of talus, talo-crural angle for lateral malleolar shortening, and malunion evidence of lateral malleolar fracture were observed. Results: Medial clear space was from 2mm to 4mm in 34 cases. Talo-crural angle was from $73^{\circ}$ to $82.5^{\circ}$ in 33 cases. One case was complicated with malunion of lateral malleolus. But, we found the same condition in the immediate post- operative radiographic film. Conclusion: We believe that the 2 cannulated screws fixation for Danis-Weber type B lateral malleolar simple fractures is an excellent treatment method.
논문 : 고효율 질화갈륨계 발광 다이오드용 전자선 증착 ITO 투명 전도 전극 연구
서재원 ( Jae Won Seo ),오화섭 ( Hwa Sub Oh ),강기만 ( Ki Man Kang ),문성민 ( Seong Min Moon ),곽준섭 ( Joon Seop Kwak ),이국회 ( Kuk Hwe Lee ),이우현 ( Woo Hyun Lee ),박영호 ( Young Ho Park ),박해성 ( Hae Sung Park ) 대한금속재료학회 ( 구 대한금속학회 ) 2008 대한금속·재료학회지 Vol.46 No.10
In order to develop transparent electrodes for high efficiency GaN-based light emitting diodes (LEDs), the electrical and optical properties of the electron beam evaporated ITO contacts have been investigated as a function of the deposition temperature and flow rate of oxygen during the deposition. As the deposition temperature increases from 140℃ to 220℃, the resistivity of the ITO films decreases slightly from 4.0×10-4 Ωcm to 3.3×10-4 Ωcm, meanwhile the transmittance of the ITO films significantly increases from 67% to 88% at the wavelength of 470 nm. When the flow rate of oxygen during the deposition increases from 2 sccm to 4 sccm, the resistivity of the ITO films increases from 3.6×10-4 Ωcm to 7.4×10-4 Ωcm, meanwhile the transmittance of the ITO films increases from 86% to 99% at 470 nm. Blue LEDs fabricated with the electron beam evaporated ITO electrode show that the ITO films deposited at 200℃ and 3 sccm of the oxygen flow rate give a low forward-bias voltage of 3.55 V at injection current of 20 mA with a highest output power.
담낭내 조영제 배출 지연으로 진단된 만성 비결석성 담낭염
김창원 ( Chang Won Kim ),이종민 ( Jong Min Lee ),오재인 ( Ja Ne Coh ),정인성 ( In Sung Jung ),강기만 ( Ki Man Kang ),정신홍 ( Shin Hong Jung ),이계성 ( Gye Sung Lee ),김안나 ( An Na Kim ),곽승수 ( Seung Soo Kwak ),이미선 ( Mi Sun 대한소화기학회 2004 대한소화기학회지 Vol.43 No.5
Chronic acalculous cholecystitis is a diagnosis of exclusion in patients complaining acalculous biliary pain. The possible causes of acalculous biliary pain are chronic gallbladder (GB) inflammation, GB dysfunction, cholesterolosis, cystic duct stenosis or microlithiasis. Recently, laparoscopic cholecystectomy is the choice of treatment for acalculous biliary pain. We experienced a 32-year-old woman whose initial symptoms were right upper quadrant pain and nausea only. The abdominal computed tomography, DISIDA scan, and upper and lower endoscopic examinations were nonspecific. Up to 48 hours after endoscopic retrograde cholangio-pancreatography, contrast emptying of GB was delayed, implying dysfunctional GB. As the patient`s right upper quadrant pain and tenderness became aggravated, the laparoscopic cholecystectomy was done and the final diagnosis of chronic acalculous cholecystitis was confirmed. (Korean J Gastroenterol 2004;43:320-323)
증례 : 만성 폐쇄성 폐질환 환자에서 Streptococcus Pyogenes에 의한 균혈증을 동반한 괴사성 폐렴 1예
정인성 ( In Sung Jung ),방도석 ( Do Seok Bang ),박열 ( Yol Park ),김재수 ( Jae Su Kim ),이성훈 ( Sung Hoon Lee ),윤영걸 ( Young Gul Yoon ),박범철 ( Beom Cheol Bag ),강기만 ( Ki Man Kang ),나동집 ( Dong Jib Na ) 대한결핵 및 호흡기학회 2004 Tuberculosis and Respiratory Diseases Vol.56 No.5