시효 처리에 의한 42Sn-58Bi 솔더와 무전해 Ni-P/치환 Au UBM 간의 계면 반응

조문기,이혁모,부성운,김태규,Cho Moon Gi,Lee Hyuck Mo,Booh Seong Woon,Kim Tae-Gyu 한국마이크로전자및패키징학회 2005 마이크로전자 및 패키징학회지 Vol.12 No.2

42Sn-58Bi 솔더(이하 wt.$\%$에 의한 표기)와 무전해 Ni-P/치환 Au under bump metallurgy (UBM) 간의 계면 반응을 intermetallic compound (IMC)의 형성과 성장, UBM의 감소, 그리고 범프 전단강도의 영향 관점에서 시효 처리 전 후에 어떠한 변화가 생기는 지를 알아보고자 하였다. 치환 Au 층을 $5{\mu}m$ 두께의 무전해 Ni-P ($14{\~}15 at.\%$ P)위에 세 가지 각기 다른 두께, 즉 $0{\mu}m$(순수한 무전해 Ni-P UBM), $0.1{\mu}m$, $1{\mu}m$로 도금하였다. 그 후 42Sn-58Bi 솔더 범프를 세 가지 다른 UBM 구조에 스크린프린팅 방식으로 형성하였다. 범프 형성 직후에는 세 가지 다른 UBM구조에서 솔더와 UBM 사이에 공통적으로 $Ni_3Sn_4$ IMC (IMC1) 만이 형성됐다. 하지만, 이를 $125^{\circ}C$에서 시효 처리를 할 경우 특이하게 Au를 함유한 UBM 구조에서는 $Ni_3Sn_4$ 위로 또 다른 4원계 화합물 (IMC2)이 관찰되었다. 원자 비로 $Sn_{77}Ni{15}Bi_6Au_2$인 4원계 화합물로 확인되었다. $Sn_{77}Ni{15}Bi_6Au_2$ 층은 솔더 조인트의 접합성에 매우 치명적인 영향을 미쳤다. 시효 처리를 거친 Au를 함유한 UBM 구조에서 솔더 범프의 전단 강도 값은 시효 처리 전에 비해 $40\%$ 이상의 감소를 보였다. The interfacial reaction between 42Sn-58Bi solder (in wt.$\%$ unless specified otherwise) and electroless Ni-P/immersion Au has been investigated before and after thermal aging, with a focus on formation and growth of an intermetallic compound (IMC) layer, consumption of under bump metallurgy (UBM), and bump shear strength. The immersion Au layer with thicknesses of 0 (bare Ni), 0.1, and $1{\mu}m$ was plated on the $5{\mu}m$ thick electroless Ni-P ($14{\~}15 at.\%$P) layer. Then, the 42Sn-58Bi solder balls were fabricated on three different UBM structures by screen-printing and pre-reflow. The $Ni_3Sn_4$ layer (IMC1) was formed at the joint interface after pre-reflow for all the three UBM structures. On aging at $125^{\circ}C$, a quaternary phase (IMC2) was observed above the $Ni_3Sn_4$ layer in the Au-containing UBM structures, which was identified as $Sn_{77}Ni{15}Bi_6Au_2$ (in at.$\%$). The thick $Sn_{77}Ni{15}Bi_6Au_2$ layer deteriorated the integrity of the solder joint and the shear strength of the solder bump was decreased by about $40\%$ compared with non-aged joints.

2008년 베이징 올림픽 슬로건("ONE WORLD ONE DREAM")의 중화민족주의적 성격에 관한 연구

조문기(Moon Gi Cho) 한국사회체육학회 2007 한국사회체육학회지 Vol.0 No.31

This study is aimed at finding out a real intent to open Olympics, based on the result of analyzing the historical and philosophical meaning of Beijing Olympics, and of illuminating the background of creation of ``One world One dream,`` attempting to consider character of Chinese nationalism involved in the slogan of Beijing Olympics ("One world One dream"). In order to do it, this study analyzed the historical development process and feature of Chinese nationalism, along with the historical and philosophical meaning of Beijing Olympics based on the ideological background of Chinese nationalism, found out the Olympics` performances desired by Chinese government and its political function, and followed up the creation background of the slogan "One world One dream" and its internal and external meaning. The findings of the study procedure are as follows. 2008 Beijing Olympics` slogan "One world One dream," containing the superficial message of the Chinese to devote themselves to realize ``One Earth`` that is a global desire, is made based on the Chinese national policies, first, pluralism and unification, second, short-term coexistence, long-term fusion, third, holding big thing and letting small thing go. The foregoing policies are expressed by a type of Chinese nationalism, being involved in "One world One dream," the slogan of 2008 Beijing Olympics, and also symbolizing and implying Chinese national policy.

사전학습 어댑터를 사용한 평생 언어 학습

조문기(Moon-Gi Cho),박경문(Gyeong-Moon Park) 한국정보과학회 2022 한국정보과학회 학술발표논문집 Vol.2022 No.06

일제강점기 경파(鏡波) 한진희(韓軫熙)의 유도활동과 사상에 관한 연구

조문기(Moon Gi Cho),임석원(Suk Won Yim) 한국사회체육학회 2012 한국사회체육학회지 Vol.0 No.48

The purpose of this study is to understand the contributor of korean judo by studying of Han, Jin-Hee`s Judo activity and thought, who was founder of Chosun-Gangmuguan(朝鮮講武館). This study covers his Judo activity and thought. The methods of this study are uses of newspapers, magazines and books. The result of this research is as follow. First, Han, jin-hee having a judo and swimming training was a lot of effort. Second, Han, jin-hee idea for an independent is that need a strong body and mind. Accordingly, Han, Jin-Hee was a truly great Judo-master.

광복전후 체조과의 변용과 교과서 편찬

조문기(Cho, Moon-Gi) 한국사회체육학회 2016 한국사회체육학회지 Vol.0 No.65

This study examined the establishment and popularization realities of the National Health Gymnastics carried out for the whole nation as a domain of ‘new physical education movement’ initiated shortly after the liberation from Japanese occupation, and reached the following conclusions through reviewing the primary historical sources such as the first volume of Chosun Chejo Yonmang Collections, bulletins, newspapers, photographs, autobiographies and other related materials. The establishment of the Chosun Chejo Yonmang(August 11, 1946) was made on the basis of the trend of Chosun sports world recognizing as the national policy the restoration of the national power through the accommodation of new physical education ideology and the nation founding on physical education, and to reform the national brand, ‘Korea’. The establishment and popularization of the Chosun Chejo Yonmang is thought to have been a turning point from the nation-leading physical education based on school physical education in the times before the liberation to civilian-leading physical education based on athletics in public.

반복학습을 이용한 회분식 반응기의 제어

조문기(Moon Gi Cho),방성호(Sung Ho Bang),조진원(Jin Won Cho),이광순(Kwang Soon Lee) 제어로봇시스템학회 1991 제어로봇시스템학회 국내학술대회 논문집 Vol.1 No.1

마라토너 서윤복의 생애와 인생관

조문기 ( Moon Gi Cho ) 한국체육사학회 2012 체육사학회지 Vol.17 No.3

이 연구는 서윤복의 생애가 한국사회에 미친 영향을 고증하기 위한 것으로서 서윤복의 수기·학적부·졸업증명서, 사진, 신문, 회고록 등의 1차 사료와 가족 및 동료를 대상으로 실시한 인터뷰 내용을 해석하여 다음과 같은 결론을 얻었다. 서윤복의 인생역정은 경기, 교육, 행정 등의 일선에서 무한한 한국사회 발전의 밑거름이 되었다고 평가할 수 있다. 특히, 조선의 재건 촉진과 원조를 명분으로 실시된 미군정 치하에서 사상 최초로 ‘KOREA’라는 국호와 태극기가 새겨진 유니폼을 착용하고 해외원정에 나서 민족의 우수한 역량과 기개를 객관적으로 입증하였으며, 천만리 이역에서 회복한 민족적 자부심과 긍지, 세계의 강호들을 제치고 맛보았던 우승의 희열을 온 겨레에 전파하였다. 이러한 행보는 약소국 조선의 열등감이 우월감으로 극적인 ‘환치’를 이루는 순간을 연출했으며, 사회통합 기제로서 스포츠의 가치가 구현되는 대표적 사례이기도 했다. 한평생을 스포츠맨으로서의 사명을 다하기 위해 불굴의 근성을 밑천으로 동분서주한 서윤복의 행보는 단연코 한국스포츠 발전의 근저가 되었을 것이며, 인적·물적 자원의 풍요 속에서도 부진을 면치 못하고 있는 한국마라톤계를 향한 경종의 메시지로 각인될 것이다. This study examines what influences Suh, Yun-Bok actually exerted on the development of Korea`s society, focusing on his athletic activities as an athlete, a sports leader and a sports administrator. The results are as follows. Suh, Yun-Bok began his regular career as a marathoner after his entrance into Gyeongseong Commercial Practice School. After the Korea`s liberation from Japanese occupation, he organized Chosun Marathon Bogeuphoe with Sohn, Kee-Chung and Nam, Seung-Ryong. He participated in, and won, a number of marathon contests, and eventually won the Boston Marathon, displaying his supreme talents and skills in the world. After retiring as a marathoner, While he was in office as the president of Seoul Municipal Stadium, he made this an international-level stadium by installing the cutting-edge facilities for the first time in Korean history. The Victory in the Boston Marathon was the great feat which displayed the newly independent Korean people`s capabilities in the world through sports activities.

일제강점기 조선연무관의 활동에 관한 연구

조문기 ( Moon Gi Cho ),임석원 ( Suk Won Yim ) 한국체육사학회 2009 체육사학회지 Vol.14 No.3

21세기 올림픽의 미래지향적 전환

조문기(Moon Gi Cho),백승세(Seung Sei Baek) 한국사회체육학회 2007 한국사회체육학회지 Vol.0 No.31

This study is aimed at proposing future-oriented conversion of the 21st century Olympics and establishing new paradigm meeting global tide. In order to accomplish the purpose, this study examined the background to create modern Olympic Gamesand Olympic ideal oriented by Cuberdin, along with politics due to nationalism and economic factors due to commercialism, in the midst of the reasons why Olympic ideal faded away. As the result of it, future-oriented switchover directions of the 21st century Olympics are proposed as follows. First, 21st century Olympics need to realize serious「Partnership」of Olympics and economy, by connecting logics of corporate management and Olympic spirit. Especially, corporations are able to pursue respectable and continuable growth, based on four spirits (Hope, Dream & Inspiration, Friendship & Fair Play, and Joy in the Effort) Olympics` slogan implies. Besides, like as IOC is pursuing harmony between economy and amateurism, corporations have to pursue profit and social responsibility simultaneously. Implementing ethical management and being trustedby community are essential requirements for corporations to survive long time. Second, 21st century Olympics need to be a social movement to pursue cultivation of national consciousness through practice of sports spirit. Olympics are an apostle of peaceful construction, beyond simple sports games, and a field of harmony with eternal advance and eternal friendship, based on the fundamental sports spirits to do best, to be fair, and to respect. Therefore, sports spirit is deemed to be a real principle and ethical creed in life, as well as being practiced in the sports games. Third, 21st century Olympics need to get wide support and assistance from the community and social tolerance, in order to develop further and contribute to human society. Broad-minded sports world needs wider participation, equal chance to join and social support. Consequently, 21st century Olympics require realization of Olympic spirits based on tolerance and equality, in opposition to abuse of power, discrimination, unfairness, social illegality and bureaucratic control.

연구발표 초록 ( 공정시스템 (Ⅴ) ) : 회분식 반응기의 제어를 위한 학습제어기의 설계 및 응용

조문기 (학),이광순 (정) ( Moon Gi Cho,Kwang Soon Lee ) 한국화학공학회 1991 춘계학술발표회 Vol.- No.-