완전 용액 공정으로 제작된 OTFT

안석근(Seok-Keun Ahn),김현우(Hyun-Woo Kim),강래욱(Rae-Wook Kang),송정근(Chung-Kun Song) 대한전자공학회 2007 대한전자공학회 학술대회 Vol.2007 No.7

The purpose of this paper is to report development of all-solution processed OTFTs using inkjet printing technique. The silver ink is used for gate, source and drain electrodes. We used poly-4 vinylphenol (PVP) for gate insulator and active layer is defined by using Bis (triisopropylsilylethynyl) pentacene (TIPS pentacene). The field effect mobility is 0.43㎠/Vs, on-off ratio is 7.1×10?.

복어 중독의 임상적 고찰

안석근,임용수,김재광,민순식,류일,양혁준,박철완,이근 大韓應急醫學會 1999 대한응급의학회지 Vol.10 No.3

Background : Puffer fish can be the source of lethal food poisoning in humans. Tetrodotoxin(TTX) poisonings are not infrequently seen in Korea, but there are few clinical reports. So we reviewed the patients of TTX poisoning and analyzed the clinical characteristics of patients. Methods : A retrospective study was performed of 40 patients who visited Chung Ang Gil Hospital from Jan. 1, 1995 to May. 31, 1998 with a diagnosis of TTX poisoning by a review of patients medical records and telephone inquiries. The diagnosis of TTX poisoning was made by causal links between consumption of puffer fish and the development of typical symptoms of tetrodotoxication. The clinical severity of the patients in this study was classified according to the classification of Fukuda. Results : Mean age of the patients was 40 years. The highest incidence was in the 4th decade in 21 patients(52.5%). The ratio of male to female was 3.44:1. Seasonal distribution excluding cases in 1998 was 12 patients in spring, 6 in summer, 5 in autumn and 12 in winter. The mean interval between consumption and symptom onset was 137 minutes. Common initial symptoms were circumoral numbness(32 patients) and paresthesia of extremities(24 patients). Various symptoms were developed after ingestion of puffer fish such as neuromuscular(39 patients), cardiovascular/pulmonary(23 patients) and gastrointestinal(16 patients) system. Mean recovery time from the onset of symptom was 22.00 hours. All were treated with symptomatic and supportive measures and recovered completely without sequelae. In 2 cases ventilatory supports were applied for 18.5 hours and 31.5 hours respectively.

성폭력 실태와 법의학적 문제에 대한 고찰

양혁준,안석근,임용수,표창해,김형수,최유덕,이근 大韓應急醫學會 1996 대한응급의학회지 Vol.7 No.4

Female sexual assault victims who received medical care at Chung Ang Gil Hospital from 1993 to 1995 were evaluated. Data were obtained from the emergency department records and gynecologic clinic ; 25 patients were evaluated. The mean age was 18.5 ; the ages ranged from 3 to 37 years old. Twenty patients(80%) were unmarried and more than half were examined within five hours of assault. The vast majority of injuries were minor, including abrasions, contusions, and minor lacerations. Fourteen patients(56%) were acquainted with the assailant. Sexual assault was violent with 64% of all cases involving the use of a knife or blunt objects as a weapon. The optimal management of the sexual assault victim involves a multidisciplinary effort on the part of all legal, medical, and support personnel who interface with the emergency department. Taking a history and conducting a general physical examination are performed methodically and the gathering of evidence proceeds simultaneously with the physical examination. Treatment entails attention to physical injuries, potential venereal diseases and pregnancy and psychiatric intervention.

Electron Emission Characteristics of MgO Thin Films Used for ac-PDPs: Part I. Secondary Electron Emission

김용석,윤상훈,안석근,홍초롱,양희선 대한금속·재료학회 2008 ELECTRONIC MATERIALS LETTERS Vol.4 No.3

In this paper, the electron emission characteristics of MgO, being used as a protection and electron emission layer for ac-PDPs, were examined in relation to glow discharge, crystal structure and defects, and the physics of Auger neutralization reaction. Emphasis has been placed on basic physics associated with secondary electron emission mechanisms from MgO subjected to glow discharge environments. Based on these analyses, we extracted major parameters that may affect the yield of the secondary electron emission and discussed possibilities for improving the yield of the emission.

박형 기판을 사용한 Package-on-Package용 상부 패키지와 하부 패키지의 Warpage 분석

박동현,신수진,안석근,오태성,Park, D.H.,Shin, S.J.,Ahn, S.G.,Oh, T.S. 한국마이크로전자및패키징학회 2015 마이크로전자 및 패키징학회지 Vol.22 No.2

박형 package-on-package의 상부 패키지와 하부 패키지에 대하여 에폭시 몰딩 컴파운드(EMC)에 따른 warpage 특성을 분석하였다. 또한 동일한 EMC로 몰딩한 패키지들의 warpage 편차를 측정하고 박형 상부 기판과 하부 기판 자체의 warpage 편차를 측정함으로서, 박형 패키지에서 warpage 편차를 유발하는 원인을 분석하였다. 박형 기판을 사용한 상부 및 하부 패키지에서는 기판 자체의 큰 warpage 편차에 기인하여 EMC의 물성이 패키지의 warpage에 미치는 영향을 규명하는 것이 어려웠다. EMC의 몰딩 면적이 $13mm{\times}13mm$로 기판($14mm{\times}14mm$)의 대부분을 차지하는 상부 패키지에서는 온도에 따른 warpage의 변화 거동이 유사하였다. 반면에 EMC의 몰딩 면적이 $8mm{\times}8mm$인 하부 패키지의 경우에는 (+) warpage와 (-) warpage가 한 시편에 모두 존재하는 복합적인 warpage 거동에 기인하여 동일한 EMC로 몰딩한 패키지들에서도 상이한 온도-warpage 거동이 측정되었다. Warpage analysis has been performed for top and bottom packages of thin package-on-packages processed with different epoxy molding compounds (EMCs). Warpage deviation was measured for packages molded with the same EMCs and also the warpage deviations of top and bottom substrates themselves were characterized in order to identify the major factor causing the package warpage. For the top and bottom packages processed with thin substrates, the warpage deviation of the substrates was large, which made it difficult to figure out the effect of EMC properties on the package warpage. Top packages, where the molding area of $13mm{\times}13mm$ covered the most of the substrate area ($14mm{\times}14mm$), exhibited similar warpage behavior with changing the temperature. On the other hand, bottom packages, where the molding area was only $8mm{\times}8mm$, exhibited the complex warpage behavior due to simultaneous occurrence of (+) and (-) warpages on the same package. Accordingly, the bottom packages showed dissimilar temperature-warpage behavior even being processed with the same EMCs.

연구논문 - 유기 / 정밀 : Gum rosin 을 이용한 유화제의 합성

김완영,이연식,안석근,변윤섭 한국공업화학회 1995 한국공업화학회 연구논문 초록집 Vol.1994 No.1

흉부둔상 환자의 폐합병증과 사망률의 예측에 관한 분석

류일,양혁준,안석근,이근,박철완 대한응급의학회 1998 대한응급의학회지 Vol.9 No.1

A retrospective review was performed of 297 patients admitted to Chung Ang Gil Hospital between June 1995 and December 1996 with a diagnosis of blunt chest trauma. Of these patients, 34% suffered either immediate or delayed complications. Immediate complications included hemothorax in 58.8%, pneumothorax in 26.5%, and pulmonary cuntusion in 20.5%. Delayed complications occurred in 9.1% of patients overall; these included pulmonary contusion in 12.7%, pneumonia in 9.8%, pulmonary embolism in 2%, peumothorax in 2%, and hemothorax in 2%. The mean age of the patients were 43 years 210 patients(70.7%) were under age 50 and 87(29.3%) were 50 years of age or older. Male to famale ratio was 1.9:1 . Mean Initial Revised Trauma Score (RTS) and the Injury Severity Score(ISS) were 7.10±0.94 and 14±8.69, respectively. There were associated injuries in 225(75.8%) patients. Overall mortality rate was 7.1% and the mortality rate was significantly greater in patients with a RTS<6, ISS 16, associated injuries, advanced age(50 years of age or older), and pulmonary complications. Pulmonary complications were significantly greater in patients with a RTS<6, ISS 16, and an associated injuries.

견갑골 골절에 대한 임상적 분석

이근,김재광,이준형,배성만,안석근,유일 대한외상학회 1997 大韓外傷學會誌 Vol.10 No.2

Background: Scapular fractures are uncommon, usually the result of major blunt trauma and frequently overlooked on initial supine chest radiography. Certainly, the emphasis in the initial workup of patients with scapular fractures is to recognize that these patients have a high degree of associated injury. Methods: Of l0898 blunt trauma patients who were treated in Chung-Ang Gil Hospital from Jan. 1995 to Dec. 1996, 96 cases with scapular fractures were analyzed retrospectively. Results: 1) The most common age group was third decade. 2) The ratio of male to female was 2.6:1. 3) Most common cause of injuries were car accidents(74%). 4) Most common part of fractures of scapula was body portion(45%) and 2nd most common part was neck portion(25%). 5) Scapular fractures had commonly associated fractures. Concomitant rib fractures were 40% and clavicular fractures were 27% of the patients. 6) Associated injuries often led to delayed recognition and treatment of the scapular fractures. Conclusion: This study demonstrates that scapular fractures are commonly associated with thoracic injury, that are clinically more significant than the scapular fractures. After blunt trauma, patients with scapular fractures should be examined cautiously and promptly about concomitant ipsilateral regional skeletal or soft-tissue injuries.

경증 두부 외상 후 발생한 저나트륨혈증 3례

이근,박철완,표창해,안석근,임용수,민순식 대한응급의학회 1998 대한응급의학회지 Vol.9 No.1

Many patients whose chief complaint is headache caused by accident such as traffic accident, falling, or assaults visit to emergency center. Majority of these patients has mild or moderate symptoms, and there is no need to treat surgically. However, the fact that head injury can cause SIADH(syndrome of inappropriate secretion of antidiuretic hormone)is likely to be overseen. Acute hyponatremia might have been associated with death or permanent brain damage. Hyponatremia is best handled by early recognition and correction of a downward trend in the serum sodium. Unfortunately, this is often difficult in the head-injured patient, where hyponatremia may occur fairly rapidly and is confused by symptoms of head injury. When moderate to severe hyponatremia occurs, it is important to determine its etiology and expeditiously initiate corrective action. There has not been any reported case of the occurrence of symptomatic SIADH after mild head injury in Korea yet. The authors report the experience of three cases of symptomatic SIADH after mild head injury with review of the literatures.

전압차 (고전압과 저전압) 에 의한 전기손상 환자의 임상양상 분석

이근,임용수,이준형,황성연,양혁준,안석근 대한외상학회 1997 大韓外傷學會誌 Vol.10 No.2

Background: There are many factors that determine the nature and severity of electrical injury, but most of them are not easy to evaluate, except voltage. Therefore, the authors analyzed clinical aspects of electrical shocks based on voltage power. Methods: The report is a retrospective clinical study of a total 127 patients who visited the Department of Emergency Medicine, Jung Ang Gil General Hospital due to electrical shock during the period from Jan. 1992 to Dec. 1996. We classified electrical shock into high-voltage($gt;1,000V) involving 27 patients and low-voltage group($lt;1,000V) with 100 patients. Results: These were the following differcnces between the two groups; 1) High-voltage group had high incidence rate in the 3rd decade(p$lt;0.01) and low-vnltage group had high incidenc= rate in 1st decade(p$lt;0.0l). 2) We observed more sites of exit(p$lt;0.001) and complications(p$lt;0.01) that were cutaneous, musculoskeletal and vascular, in the high-voltage group. 3) More patients were received skin grafts(p$lt;0.001) and amputations(p$lt;0.005) in the high-voltage group. Conclusion: We concluded that the high-voltage group had more severe tissue destruction and there were no dilferences in other clinical aspects and mortality rate between the two groups.