CH₄ 농도 변화가 저유전 SiOC(-H) 박막의 유전특성에 미치는 효과

신동희,김종훈,임대순,김찬배,Shin, Dong-Hee,Kim, Jong-Hoon,Lim, Dae-Soon,Kim, Chan-Bae 한국재료학회 2009 한국재료학회지 Vol.19 No.2

The development of low-k materials is essential for modern semiconductor processes to reduce the cross-talk, signal delay and capacitance between multiple layers. The effect of the $CH_4$ concentration on the formation of SiOC(-H) films and their dielectric characteristics were investigated. SiOC(-H) thin films were deposited on Si(100)/$SiO_2$/Ti/Pt substrates by plasma-enhanced chemical vapor deposition (PECVD) with $SiH_4$, $CO_2$ and $CH_4$ gas mixtures. After the deposition, the SiOC(-H) thin films were annealed in an Ar atmosphere using rapid thermal annealing (RTA) for 30min. The electrical properties of the SiOC(-H) films were then measured using an impedance analyzer. The dielectric constant decreased as the $CH_4$ concentration of low-k SiOC(-H) thin film increased. The decrease in the dielectric constant was explained in terms of the decrease of the ionic polarization due to the increase of the relative carbon content. The spectrum via Fourier transform infrared (FT-IR) spectroscopy showed a variety of bonding configurations, including Si-O-Si, H-Si-O, Si-$(CH_3)_2$, Si-$CH_3$ and $CH_x$ in the absorbance mode over the range from 650 to $4000\;cm^{-1}$. The results showed that dielectric properties with different $CH_4$ concentrations are closely related to the (Si-$CH_3$)/[(Si-$CH_3$)+(Si-O)] ratio.

Graphene Synthesis from Graphite/Ni Composite Films Grown by Sputtering

신동희,Seung Bum Yang,Dong Yeol Shin,김창오,김성,최석호,백상현 한국물리학회 2012 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.61 No.4

Graphite/Ni composite films have been deposited on SiO<SUB>2</SUB>/Si (100) wafers by varying their graphite concentration (<I>n</I><SUB>G</SUB>) and thickness (t) from 2 to 12 wt % and 40 to 400 nm, respectively in a RF sputtering system, subsequently annealed at 900 ℃ for 4 min, and then slowly cooled to room temperature to form graphene layer on Ni surface. Several structural-analysis techniques reveal optimum <I>n</I><SUB>G</SUB> (~8 wt %) and t (~160 nm) of the composite films for the synthesis of fewest-layer and defect-minimized graphene. At the annealing temperature, carbon atoms diffuse out from the composite film followed by their precipitation as graphene on the Ni layer as the carbon solubility limit in Ni is reached during the cooling period. Based on this mechanism, the optimum conditions are explained. Our approach provides advantages to tune the number of layers simply by varying <I>n</I><SUB>G</SUB> and t of the composite films.

국내 지구 과학 교육 연구의 동향과 나아갈 방향

신동희,Shin, Dong-Hee 한국지구과학회 2000 한국지구과학회지 Vol.21 No.4

${\ulcorner}$한국지구과학회지${\lrcorner}$가 발간된 지 20년이 지난 이 시점에 우리 나라 지구 과학 연구의 과거와 현재를 살펴보고 이를 근거로 나아갈 방향을 알아보기 위하여 ${\ulcorner}$한국지구과학회지${\lrcorner}$에 게재된 106편의 지구 과학 교육 연구 논문을 분석하였다. 양적 측면의 분석 결과, 지구 과학 교육 관련 연구가 최근 2년 동안 증가 추세에 있는 것으로 나타났다, 연구의 주제 측면에서 보면, 지구 과학 교육 내용에 관한 연구가 가장 많았으나, 우주 과학, 지질 과학, 대기 과학, 해양 과학 등의 ,세부 영역별 연구가 동일한 비중으로 이루어지지는 않았다. 연구의 대상 측면에서 보면, 교사보다는 학생 , 특히 고등 학생을 대상으로 하는 연구가 많았다. 연구의 방법 측면에서 보면, 교과서나 교육 과정을 분석하거나 검사 문항 등을 활용한 조사 연구가 가장 많았고, 문헌 연구는 거의 이루어지지 않았다. 연구의 내용 측면에서 보면, 교수/학습과 관련된 연구가 가장 많이 이루어진 반면 평가나 교사 양성에 관한 연구는 거의 이루어지지 않았다. To investigate the trend of earth science education researches published in ${\ulcorner}$The Journal of the Korean Earth Science Society${\lrcorner}$ during last 20 years, 106 articles were analyzed. The results show that the number of researches in earth science education has increased, especially in recent two years. From the perspective of areas. general earth sciences were studied more than other areas such as astronomy, geology, and meteorology. From the perspective of subjects, students, especially high-school students, were studied more than teachers. From the perspective of research methodology, survey including content analysis of textbooks or curriculum were most preferred. In contrast, literature study were never accomplished. From the perspective of contents, researches of leaching/learning were the most common. It is notable that few studies were about educational assessment or teacher training.

BGA 무연솔더(Sn-3.0Ag-0.5Cu)와 무전해 Ni-W-P 도금층 계면의 열 안정성에 대한 연구

신동희,조진기,강성군,Shin, Dong-Hee,Cho, Jin-Ki,Kang, Seung-Goon 한국마이크로전자및패키징학회 2010 마이크로전자 및 패키징학회지 Vol.17 No.1

본 연구에서는 무연 솔더 중 우수한 특성을 보여 실용화된 Sn-3.0Ag-0.5Cu 조성의 솔더를 사용하여 2주 동안의 시효조건에서 W의 함량이 무전해 Ni-W-P 도금층과 솔더와의 계면에서의 IMC 생성에 미치는 영향에 대해서 조사하였다. 도금층내 인의 함량은 8 wt.%로 고정하였고, 텅스텐의 함량은 각각 0, 3, 6 및 9 wt.%로 변화시켰으며, 모든 시료는 $255^{\circ}C$에서 리플로우한 후, $200^{\circ}C$에서 2주 동안 시효처리하였다. 각각의 시료에서 $(Cu,Ni)_6Sn_5$와 $(Ni,Cu)_3Sn_4$의 IMC가 관찰되었으며, 시효처리시간의 증가에 따라 UBM과 무연납의 계면에서 생성된 IMC가 증가함을 보였고, W의 함량이 높을수록 열적 안정성이 증가하여 $Ni(W)_3P$의 생성 속도를 늦춰 그에 따른 영향으로 IMC의 두께가 증가함을 보였다. In this study, we investigated the morphology and thermal stability of interfacial phases in joint between lead free solder(Sn-3.0Ag-0.5Cu) and electroless Ni-W-P under bump metallizations(UBM) with different tungsten contents as a function of thermal aging. Content of phosphorus of each deposits was fixed at 8 wt.%, and content of tungsten was variated each 0, 3, 6 and 9 wt.%. Specimens were prepared by reflowing at $255^{\circ}C$, aging range was $200^{\circ}C$ and up to 2 weeks. After reflow process, in the electroless Ni(W)-P/solder joint, the interfacial intermetallic compound(IMC) was showed both $(Cu,Ni)_6Sn_5$ and $(Ni,Cu)_3Sn_4$. UBM and generated IMC at the interface of lead free solder was proportionally increased with aging time. The thickness of IMC was increased because the generation rate of $Ni(W)_3P$ decreased with increasing contents of W.

지구과학과 환경 교육

신동희,Shin, Dong-Hee 한국지구과학회 2001 한국지구과학회지 Vol.22 No.2

오늘날 지구 환경 문제가 크게 부각됨에 따라 환경 교육의 중요성도 점차 강조되고 있다. 과학은 환경에 대한 교육, 환경 안에서의 교육, 환경을 위한 교육 등에 크게 기여할 수 있는 과목이다. 과학의 여러 분야 중에서 지구 과학은 연구의 대상이 지구에서 일어나는 자연적 또는 인위적 변화의 과정이라는 점에서 볼 때, 환경 교육적 차원에서 접근할 수 있는 내용이 상당히 많다. 따라서, 지구 과학 교육은 환경 교육에 큰 역할을 할 수 있음이 분명하다 이는 지구계 교육과 환경 교육의 목표가 거의 일치하고 있고, 지구에 대한 소양을 갖추기 위한 내용이 환경에 대한 소양을 갖추기 위한 내용에서 크게 벗어나지 않음에서도 알 수 있다. 그러나, 우리 나라의 지구 과학 교육 과정에서는 환경 교육적 차원의 관심이 적은 것으로 나타났다. 지구 환경을 전체적으로 고려한 지구 과학 교육이야말로 지구 과학 교육에 대한 새로운 관심을 집중시키는 방법이 될 뿐만 아니라, 인류의 당면 과제인 지구 환경 문제를 해결하고자 하는 환경교육에 적극적으로 참여하게 되는 길이기도 하다. Recently, with the increase of environmental problems, the importance of environmental education has also been emphasized. Science is a subject that enormously contributes to education about the environment, education in the environment, and education for the environment. Among various fields of science, earth science has a large amount of contents related environmental education, from the perspectives that the subjects of earth science are natural and artificial changes in the earth surface. Accordingly, it is clear that earth science education can play an important role in environmental education. This is proved in the fact that the goal and specifics of earth systems education coincidence with those of environmental education. Earth science curriculum in Korea, however, contains few contents related to environmental education. Earth science education that concerns our environment as a whole will help not only catch a new interest on the field of earth science but actively participate in solving our environmental problems.

SNS를 활용한 집단참여형 콘텐츠 특성 연구

신동희(Shin, Donghee),김희경(Kim, Hee Kyung),김태양(Kim, Taeyang) 한국디자인지식학회 2014 디자인지식저널 Vol.30 No.-

인간이 타인과 소통하고 싶어 하는 욕망은 면대면 접촉에서 비면대면 접속으로 이어지고 있다. 테크놀로지와 미디어의 발달은 커뮤니케이션의 다양성을 가져왔는데 소셜 미디어 중 소셜 네트워크 서비스(SNS)가 현재 가장 대표적인 것이라고 할 수 있다. 또한, 스마트폰의 빠른 보급과 확산으로 언제 어디서나 SNS를 이용한 소통이 가능해졌다. 이제 페이스북이나 트위터는 단순히 자신의 상태를 알리거나 기업 혹은 단체를 소개하는 글에서 부터 마케팅, 게임으로 까지 이어지고 있는데, 최근에는 개인의 지인뿐만 아니라 불특정 다수가 뜻을 같이 하여 단순한 글이나 이슈를 확대하여 콘텐츠 화하는 집단참여형 콘텐츠를 제작하는 데까지 이르렀다. 이것은 집단참여형 콘텐츠라고 할 수 있는데, 사례를 분석해 본 결과 집단참여형 콘텐츠는 구전성, 현장성, 참여성, 공유성, 이야기성, 예측불허성, 콘텐츠성, 자기효능성, 놀이의존성의 9가지 특성을 도출할 수 있었다. The instinctive need of humans to interact with others has led the means of communication from face-to-face communication to non face-to-face communication. The advances in technology and media brought forth diversity in ways people communicate and interact. SNS(Social Network Services) is at the forefront of current social media. In addition, Smart phones enabled communication through SNS any time at any place. Now the use of Facebook and Twitter goes beyond simply updating one"s status or introducing companies and organizations. Many use Facebook and Twitter as a marketing tool, for gaming, and in recent developments, a streamline of random people amplify a certain comment or issue to come up with collective participation contents. This study examines the concept of social media and SNS; and highlights and studies the two cases where the characteristics of SNS are applied, resulting in collective participation contents, also called SCC. The study shows that the attribute of SCC has affected how companies make their marketing contents for social media and that SCC had an influence on how people now find value less in economy and more in play and fun.

동절기 개별오수처리시설 처리효율 개선을 위한 고도처리 방안 연구

신동희 ( Dong Hee Shin ),김선규 ( Seung Kyu Kim ),한승철 ( Seung Chul Han ),이광현 ( Kwang Hyun Lee ),주현종 ( Hyun Jong Joo ) 한국물환경학회 ( 구 한국수질보전학회 ) 2010 공동 추계학술발표회 Vol.2010 No.-

우리 나라 학생들의 과학적 소양 성취도

신동희(Dong Hee Shin),노국향(Koog Hyang Ro) 한국과학교육학회 2002 한국과학교육학회지 Vol.22 No.1

OECD/PISA(Programme for International Student Assessment) is significant in that it is first international comparative study assessing 15-year-old students` scientific literacy. Based on Korean students` results of percent correct in 35 science items, several characteristics such as followings were revealed. First, from the perspectives of science application area, Korean students showed the highest achievement in the area of `science in technology` followed by in the areas of `science in life and health` and `sciences in earth and environment`. Male students achieved significantly better than female counterparts in all three areas. Second, the achievement in items of science knowledge was significantly higher than in items of scientific processes. Whereas the achievement difference between science knowledge- and scientific process items was larger for male students. Third, form the perspectives of application contexts, Korean students showed the highest achievement in the historical context and the lowest achievement in the personal context. Fourth, from the perspectives of item format, Korean students performed significantly better in open-constructed items rather than in multiple-choice items. Fifth, Korean students showed low performance in items of biotechnology and environment-related issue, which was more prominent for female students. Sixth, whereas male students performed significantly better than female students in most aspects, it is noteworthy that there was no significant gender differences in items of scientific processes and females performed significantly better than male students in open-constructed items which require long sentence.

자동선반용 캠 제작의 자동화 시스템

신동희(D. H. Shin),임재인(J. I. Lim),안중환(J. H. Ahn) 한국정밀공학회 1993 한국정밀공학회 학술발표대회 논문집 Vol.1993 No.11월

OECD 주관 학생 성취도 국제 비교 연구 ( PISA 2000 ) 지구 환경 과학 영역 성취도에서의 성 (性) 차이

신동희(Dong Hee Shin),박정(Chung Park),노국향(Koog Hyang Ro) 한국과학교육학회 2002 한국과학교육학회지 Vol.22 No.1

This study was based on the analysis of earth and environmental science items in PISA 2000 data. The purpose of this study was to identify i) gender differences in scientific literacy, ii) item characteristics that favored either female or male, and iii) misconceptions that 15-years-old Korean students have in the field of earth and environmental science. The results revealed significant gender differences. Overall, male students demonstrated higher level of achievement than female students. On the other hand, amongst high ability students, female students outperformed male students in open-constructed items. Female students tended to score higher on items that required long answers or items related to scientific processes. whereas male students outperformed female students in science knowledge or items that required data interpretation. The study also revealed that a majority of Korean students had misconceptions in fundamental earth and environmental science knowledge, such as the direction of earth`s axis and equator, and the causes of Greenhouse Effect.