$\gamma$-plane 사파이어 기판 위에 성장한 무분극 ${alpha}$-plane GaN 층의 전기적 비등방성 연구

김재범,김동호,황성민,김태근,Kim, Jae-Bum,Kim, Dong-Ho,Hwang, Sung-Min,Kim, Tae-Geun 대한전자공학회 2010 電子工學會論文誌-SD (Semiconductor and devices) Vol.47 No.8

본 논문에서는 무분극 GaN층에서 관찰되는 성장축의 방향성에 따른 전기적 비등방성에 대한 연구를 수행하였다. 본 연구를 위해 $\gamma$-plane 사파이어 기판 상에 유기화학기상증착법 (Metal-organic chemical vapor deposition)을 이용하여 600 nm 두께의 ${\alpha}$-plane n-type GaN층을 성장시킨 후, Ti/Al/Ni/Au (20 nm/ 150 nm/ 30 nm/ 100 nm) 오믹 전극을 증착하여 transfer length method (TLM)로 접촉저항을 측정하였다. 그 결과, ${\alpha}$-plane GaN층이 갖는 축의 방향성에 의한 접촉저항이 차이는 없는 것을 확인하였고, 면저항 측정 시에는 m-축 방향에 비해 c-축 방향에서 발생하는 면저항 값이 약 25%~75% 정도 크게 발생하는 것을 확인할 수 있었다. 이러한 전기적 특성의 비등방성은 c-축 성장방향에 대해 수직방향을 갖는 기저적층결함 (basal stacking faults)의 생성으로 인한 전자들의 거동 저하에 의한 것으로 사료된다. We report on the electrical properties of Ti/Al/Ni/Au (20 nm/ 150 nm/ 30 nm/ 100 nm) Ohmic contacts and the anisotropic conductivity of n-type ${\alpha}$-plane ([11-20]) GaN grown on $\gamma$-plane ([1-102]) sapphire substrates. The Ti/Al/Ni/Au Ohmic contacts and their sheet resistances are characterized by using the transfer length method (TLM) as a function of azimuthal angles. It is found that the specific contact resistance does not depend on the axis orientation and there are significant electrical anisotropy in ${\alpha}$-plane GaN films on $\gamma$-plane sapphire substrates, and the sheet resistance varies with azimuthal angles. The sheet resistance values in the direction parallel to m-axis [1-100] are 25% ~ 75% lower than those parallel to c-axis [0001] directions. Thus, Basal stacking faults (BSFs) are offered as a feasible source of the anisotropic mobility in defected m-axis direction because the band-edge discontinuities owing to the differential band gap structure.

경열공 식도절제술을 이용한 부식성 식도협착증의 치료

김재범,박창권,Kim, Jae-Bum,Park, Chang-Kwon 대한기관식도과학회 2009 大韓氣管食道科學會誌 Vol.15 No.1

Background: Surgical treatment of corrosive esophageal stricture with colon interposition was very widely used. The colon interposition advantage is low reflux esophagitis risk and preservation of gastric capacity and peristalsis. This procedure was introduced by Orsoni and much improved. But, if stomach injury was minimal, gastric interposition is useful due to simple technique and low complication. Material and Method: Esophageal reconstruction by the transhiatal esophagectomy and intracervical esophagogastrostomy was done in 7 patients of corrosive esophageal stricture at Dong-San medical center from January 1998 to December 2007. Result: There were six female and one male patients raBackground Surgical treatment of corrosive esophageal stricture with colon interposition was very widely used. The colon interposition advantage is low reflux esophagitis risk and preservation of gastric capacity and peristalsis. This procedure was introduced by Orsoni and much improved. But, if stomach injury was minimal, gastric interposition is useful due to simple technique and low complication. Material and Method: Esophageal reconstruction by the transhiatal esophagectomy and intracervical esophagogastrostomy was done in 7 patients of corrosive esophageal stricture at Dong-San medical center from January 1998 to December 2007. Result: There were six female and one male patients ranging from 29 to 69 years of age. The complication was two anastomosis site leakage, one gastric necrosis and one mortality due to bowel strangulation and sepsis. Conclusion: Transhiatal esophagectomy and intracervical esophagogastrostomy is safety and useful method at selection case even though corrosive esophageal resection is debated.

ALD법으로 제조된 Al₂O₃ 박막의 물리적 특성

김재범,권덕렬,오기영,이종무,Kim, Jae-Bum,Kwon, Duk-Ryel,Oh, Ki-Young,Lee, Chong-Mu 한국재료학회 2002 한국재료학회지 Vol.12 No.6

$Al_2O_3$ is a promising gate dielectric because of its high dielectric constant, high resistivity and low leakage current. Since $OH^-$ radical in $Al_2O_3$ films deposited by ALD using TMA and $H_2O$ degrades the good properties of $Al_2O_3$, TMA and $O_3$ were used to deposite $Al_2O_3$ films and the effects of $O_3$ on the properties of the $Al_2O_3$ films were investigated. The growth rate of the $Al_2O_3$ film under the optimum condition was 0.85 $\AA$/cycle. According to the XPS analysis results the $OH^-$ concentration in the $Al_2O_3$ film deposited using $O_3$ is lower than that using $H_2O$. RBS analysis results indicate the chemical formula of the film is $Al_{2.2}O_{2.8}$. The carbon concentration in the film detected by AES is under 1 at%. SEM observation confirms that the step coverage of the $Al_2O_3$ film deposited by ALD using $O_3$ is nearly 100%.

중간 기관지 내 이물의 수술적 치료

김재범,박창권,Kim, Jae-Bum,Park, Chang-Kwon 대한기관식도과학회 2010 大韓氣管食道科學會誌 Vol.16 No.1

Occult bronchial foreign body is that long-standing foreign body lodge in bronchial tree. Occult bronchial foreign bodies arc rare in adults, whereas tracheobronchial aspiration of foreign bodies occurs commonly in children. A 65-year-old man with chronic cough, sputum production, and fever was transferred for treatment of right middle and lower lobc collapse and obstructive pneumonitis as evidenced by imaging studies. The patient was treated with right middle-lower bilobectomy because fiberoptic bronchoscopic removal of the foreign body failed. We report this case with review of literatures.

식도암의 수술에서 transhiatal 술식의 역할

김재범,박창권,Kim, Jae-Bum,Park, Chang-Kwon 대한기관식도과학회 2009 大韓氣管食道科學會誌 Vol.15 No.2

Background : Controversy exists whether patients with esophageal carcinoma are best managed with classical Ivor Lewis esophagectomy(ILO) as combined thoracic and abdominal approach or transhiatal esophagectomy(THO). The THO approach is known to be superior with respect to operative time, morbidity and mortality, and length of stay, especially at poor pulmonary function patient, but may represent an inferior cancer operation due to inadequate mediastinal clearance compared with ILO. Accordingly, we estimated the THO role at esophageal cancer to compare each operative approach. Material and Method : From January 2002 to December 2007, we performed a retrospective review of all esophagectomies performed at Keimyung University Dongsan Medical Center; 36 underwent THO, and 11 underwent ILO. Result : There were all men and squamous cell carcinoma but 1 woman at ILO group, 2 women at THO group. There were no significant differences between THO and ILO with age, sex, location of tumor, mean tumor length. There were significant differences at preoperative pulmonary function test(In ILO group, average FEV1 is $2.65{\pm}0.6\;L/min$ and iIn THO group, average FEV1 is $2.07{\pm}0.7\;L/min$). The amount of blood transfusion, hospital stay, leak rates and respiratory complication, hospital mortality rate were not significantly different. Conclusion : There was no significant difference in the post-operative complication, hospital mortality rate, long-term survival of patients of both operative method. THO method had lower mobidity and mortality at poor pulmonary function patient than ILO method. Hence, THO is a valid alternative to ILO for patients with poor general condition or expected post-operative respiratory complication.

Tracheal and esophageal injury by fish bone

김재범,박창권,Kim, Jae-Bum,Park, Chang-Kwon The Korean Bronchoesophagological Society 2008 大韓氣管食道科學會誌 Vol.14 No.1

Tracheal injury associated with esophageal injury due to fish bone is very rare. Also, treatment of mediastinitis due to esophageal perforation when it is diagnosed late remains controversial. We report the case that we have successfully experienced treatment of mediastinitis due to tracheal and esophageal injury by fish bone.

환경보도와 제3자 효과

김재범(Jae-Bum Kim),이정기(Jeong-Ki Lee) 한국언론학회 2012 한국언론학보 Vol.56 No.1

동물 및 인체시험을 통한 Nattokinase의 항응고 작용 및 섬유소 용해능 평가

김재범(Jae-Bum Kim),유철배(Chul-Bae Yoo),신현만(Hyun-Man Shin),정준기(Joon-Ki Jung),장형욱(Hyung-Wook Jang) 한국생물공학회 2011 KSBB Journal Vol.26 No.5

Bacillus subtilis natto producing high level of a fibrinolytic enzyme was selected and Ultra Nattokinase<SUP>ⓡ</SUP> was manufactured by fermentation and purification. It was performed the evaluation of the antithrombotic effect of Ultra Nattokinase<SUP>ⓡ</SUP> (20,000 FU/g) with rat blood plasma. The maximum aggregation (inhibition ratio) was 71% (0%), 69% (2.8%), 62% (12.7%), 16% (77.5%) and 9% (87.3%), respectively, in the order of 0, 5, 10, 50 and 100 mg/mL of Ultra Nattokinase<SUP>ⓡ</SUP> solutions. Ultra Nattokinase<SUP>ⓡ</SUP> had antithrombotic effect, which was associated with the suppression of collageninduced platelet aggregation. Ultra Nattokinase<SUP>ⓡ</SUP> in the topic of the FDP (fibrinogen degradation products) in blood coagulation tests showed a significant increasing trend. And based on the daily record of meal 39 people of ITT (what ?) group consisted with 19 people of NP (what ?) group and 20 people of PN (what ?) group except four people, two people who took vitamin K affecting the experiment and two people who took alcohol, finding to be taken Ultra Nattokinase<SUP>ⓡ</SUP> showed an increase in the FDP value after four weeks. In addition, FDP value of 41 people of ITT group except two people having metabolic syndrome was increased by Ultra Nattokinase<SUP>ⓡ</SUP>.

주제별 논단 : 금융분쟁해결제도 ; "금융소비자 보호에 관한 법률안"의 내용 및 문제점

김재범 ( Jae Bum Kim ) 한국금융법학회 2013 金融法硏究 Vol.10 No.2

Recently it has become an urgent pending problem to protect financial consumers since several financial accidents which produced to massive victims. For the purpose it needs to enact the law of financial consumer protection and to reform the financial supervisory authority. The government legislative bill has been proposed since 2011, however it has not been enacted yet. Final government bill of July 6, 2012 has been still debated in the Assembly. As regards the independence of financial supervisory authority, it is offered in the bill that it should be established within the ``Financial Supervisory Service (FSS)`` and have more strengthened power than present in budget, personnel matters and work by the bill. However I think the independence of it is very weak because it is proposed to consult with governor of FSS to decide budget and personnel matters in the bill. Even it needs the recommendation of the governor of FSS to appoint director of it. Several legislation bills by Assemblymen have been proposed too. According to them it is majority opinion that financial supervisory authority be placed under Financial Committee and it has equivalent status to FSS. In this way financial supervisory function could be worked more independently and efficiently than present. Although diverse opinions can be proposed, it should be achieved that financial supervisory authority be independent and be granted powers needed to supervise the financial company.

주주 충실의무론의 수용

김재범(Jae bum Kim) 한국비교사법학회 2015 비교사법 Vol.22 No.1

주주의 충실의무은 이사의 충실의무와 함께 그 도입에 논란이 있는 개념이다. 이사의 충실의무는 상법에 규정이 있지만, 그 개념이 확정적으로 정립되어 있지 않고 논란을 빚고 있다. 충실의무는 명확히 개념이 정립되지 않았기 때문에 법원도 이사의 충실의무 및 주주의 충실의무에 관하여 적극적으로 개념을 정립하는 것을 꺼리고 있다. 성문화된 이사 충실의무의 개념을 정립한다면 이것이 주주의 충실의무의 개념정의에도 영향을 줄 것으로 보인다. 이사가 업무집행 시에 어느 정도의 주의를 기울여야 하는지 여부에 관한 선관주의의무와 달리 충실의무는 이해충돌 상황으로부터 그 위반을 인정하므로 주의의무 위반(고의 또는 과실)에 대한 판단이 반드시 따라야 하는 것이 아니다. 주주의 충실의무는 이사처럼 직무를 수행하지는 않지만, 경영에 영향력을 미치는 지배주주의 지위 또는 주주총회의 결의에 결정적인 의결력을 가진 주주에게 회사이익을 우선하라는 요구로서 그 도입이 주장되고 있다. 상법은 지배주주의 행위를 규율하는 규정으로서 업무집행지시자 등의 책임(제401조의2), 자기거래(제398조) 상장회사의 주요주주에 대한 신용공여제한(제542조의9), 특별이해관계인에 대한 의결권제한(제368조 제3항) 등을 두었으나, 이는 지배주주 행위를 독립적으로 규율하지 못하기 때문에 제도 면에서 완전치 못하다. 주주의 충실의무는 그의 권리행사가 회사 또는 다른 주주의 이익에 영향을 미치는 경우처럼 지배적인 영향력을 갖는 주주에게 그에 따르는 의무로서 인정될 수 있다. 충실의무가 적용될 사례로서 회사와 지배주주의 거래, 회사기회의 편취 및 소주주를 억압하는 행위 등을 들 수 있다. 충실의무를 적용하면 해당 거래에 대한 금지청구, 의결권 행사 시에는 결의하자의 소 및 손해배상청구권이 성립한다. The shareholder's duty of loyalty has been a debate with the concept of director's duty of loyalty. The latter has a legal basis in the Commercial Act, but owing to the ambiguousness of the concept, court has not set up the concrete concept of it. When we set up the concept of the director's duty of loyalty, it would effect the shareholder's duty of loyalty. While the duty of care is related to the caution about conducting corporate business, the duty of loyalty does not relate to whether or not there be a breach of duty of care. It has been insisted to introduce the shareholder's duty of loyalty to regulate the shareholder's behavior through which involve management or resolute in the shareholders' meeting to cause to the loss of corporation or shareholders. The Commercial Act has the articles to regulate the controlling shareholder like as the liability of a person instructing to conduct corporate business(§ 401-2), self-dealing(§ 398), credit offering(§ 542-9) and limit of vote of specially interested shareholder(§ 368 ③). However these articles do not regulate directly the shareholder. The duty of loyalty should be imposed to the controlling shareholders whose exercise of right would influence the interest of corporation or shareholder. The application case of shareholder's duty of loyalty are self-dealing between corporation and shareholder, the usurpation of corporate opportunity and the oppression of minority shareholders, etc. When shareholder's duty of loyalty were violated, the relief of filing for an injunction and the suit for affirming nullity of resolution or damages could be considered.