• 제목/요약/키워드: Structural performance optimization

검색결과 573건 처리시간 0.019초

플로팅 금속 가드링 구조를 이용한 Ga2O3 쇼트키 장벽 다이오드의 항복 특성 개선 연구 (Improved breakdown characteristics of Ga2O3 Schottky barrier diode using floating metal guard ring structure)

  • 최준행;차호영
    • 전기전자학회논문지
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    • 제23권1호
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    • pp.193-199
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    • 2019
  • 본 연구에서는 TCAD 시뮬레이션을 사용하여 산화갈륨 ($Ga_2O_3$) 기반 수직형 쇼트키 장벽 다이오드 고전압 스위칭 소자의 항복전압 특성을 개선하기 위한 가드링 구조를 이온 주입이 필요 없는 간단한 플로팅 금속 구조를 활용하여 제안하였다. 가드링 구조를 도입하여 양극 모서리에 집중되던 전계를 감소시켜 항복전압 성능 개선을 확인하였으며, 이때 금속 가드링의 폭과 간격 및 개수에 따른 항복전압 특성 분석을 전류-전압 특성과 내부 전계 및 포텐셜 분포를 함께 분석하여 최적화를 수행하였다. N형 전자 전송층의 도핑농도가 $5{\times}10^{16}cm^{-3}$이고 두께가 $5{\mu}m$인 구조에 대하여 $1.5{\mu}m$ 폭의 금속 가드링을 $0.2{\mu}m$로 5개 배치하였을 경우 항복전압 2000 V를 얻었으며 이는 가드링 없는 구조에서 얻은 940 V 대비 두 배 이상 향상된 결과이며 온저항 특성의 저하는 없는 것으로 확인되었다. 본 연구에서 활용한 플로팅 금속 가드링 구조는 추가적인 공정단계 없이 소자의 특성을 향상시킬 수 있는 매우 활용도가 높은 기술로 기대된다.

유리구슬을 사용하여 제조된 재귀반사시트의 구조 및 재귀반사 특성 연구 (Structural and Physical Properties of Reflective Sheets Prepared by Using Glass Beads)

  • 임두현;이민호;허민영;안주현;박진우;유지현;김종선;류호석;안효준;김익환
    • Elastomers and Composites
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    • 제46권4호
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    • pp.277-283
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    • 2011
  • 본 연구에서는 유리구슬을 사용하여 일반반사지 및 고휘도 반사지를 제조하여 그들의 반사성능과 물리적 특성을 조사하였다. 유리구슬형 재귀반사 시트의 제조 방법에는 봉입렌즈형과 캡슐렌즈형의 두 가지로 구분될 수 있는데 유리구슬이 공기에 노출되는지 그렇지 않은지를 통해서 구분한다. 유리구슬 위를 덮고 있는 층이 있는 봉입렌즈형은 유리구슬 위의 한 개의 층으로 된 캡슐렌즈형에 비해 악천 후에도 휘도 변화가 거의 없다. 유리구슬의 도포량에 따라 휘도가 달라지므로 최적의 도포량을 조사하였고, 다양한 색상을 지니는 유리구슬 형태의 봉입렌즈형 재귀반사 시트와 캡슐렌즈형 재귀반사 시트를 제조하여 입사각과 관찰각에 따른 재귀반사 시트의 휘도를 조사하여 비교하였다. 공기에 노출되는 캡슐렌즈형 백색 재귀반사 시트의 휘도가 $210.4cd/1x{\cdot}m^2$으로 봉입렌즈형의 $74cd/1x{\cdot}m^2$ 보다 높은 것으로 나타났다. 그리고 세탁전과 후의 휘도변화를 통하여 재귀반사 시트의 세탁력과 점착성능을 분석하였는데, 캡슐렌즈형은 세탁 후 유리구슬의 수가 줄었고 또한 알루미늄 증착면이 훼손되어 증착된 부분이 일어난 것을 확인할 수 있었다.

빅데이터 도입의도에 미치는 영향요인에 관한 연구: 전략적 가치인식과 TOE(Technology Organizational Environment) Framework을 중심으로 (An Empirical Study on the Influencing Factors for Big Data Intented Adoption: Focusing on the Strategic Value Recognition and TOE Framework)

  • 가회광;김진수
    • Asia pacific journal of information systems
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    • 제24권4호
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    • pp.443-472
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    • 2014
  • To survive in the global competitive environment, enterprise should be able to solve various problems and find the optimal solution effectively. The big-data is being perceived as a tool for solving enterprise problems effectively and improve competitiveness with its' various problem solving and advanced predictive capabilities. Due to its remarkable performance, the implementation of big data systems has been increased through many enterprises around the world. Currently the big-data is called the 'crude oil' of the 21st century and is expected to provide competitive superiority. The reason why the big data is in the limelight is because while the conventional IT technology has been falling behind much in its possibility level, the big data has gone beyond the technological possibility and has the advantage of being utilized to create new values such as business optimization and new business creation through analysis of big data. Since the big data has been introduced too hastily without considering the strategic value deduction and achievement obtained through the big data, however, there are difficulties in the strategic value deduction and data utilization that can be gained through big data. According to the survey result of 1,800 IT professionals from 18 countries world wide, the percentage of the corporation where the big data is being utilized well was only 28%, and many of them responded that they are having difficulties in strategic value deduction and operation through big data. The strategic value should be deducted and environment phases like corporate internal and external related regulations and systems should be considered in order to introduce big data, but these factors were not well being reflected. The cause of the failure turned out to be that the big data was introduced by way of the IT trend and surrounding environment, but it was introduced hastily in the situation where the introduction condition was not well arranged. The strategic value which can be obtained through big data should be clearly comprehended and systematic environment analysis is very important about applicability in order to introduce successful big data, but since the corporations are considering only partial achievements and technological phases that can be obtained through big data, the successful introduction is not being made. Previous study shows that most of big data researches are focused on big data concept, cases, and practical suggestions without empirical study. The purpose of this study is provide the theoretically and practically useful implementation framework and strategies of big data systems with conducting comprehensive literature review, finding influencing factors for successful big data systems implementation, and analysing empirical models. To do this, the elements which can affect the introduction intention of big data were deducted by reviewing the information system's successful factors, strategic value perception factors, considering factors for the information system introduction environment and big data related literature in order to comprehend the effect factors when the corporations introduce big data and structured questionnaire was developed. After that, the questionnaire and the statistical analysis were performed with the people in charge of the big data inside the corporations as objects. According to the statistical analysis, it was shown that the strategic value perception factor and the inside-industry environmental factors affected positively the introduction intention of big data. The theoretical, practical and political implications deducted from the study result is as follows. The frist theoretical implication is that this study has proposed theoretically effect factors which affect the introduction intention of big data by reviewing the strategic value perception and environmental factors and big data related precedent studies and proposed the variables and measurement items which were analyzed empirically and verified. This study has meaning in that it has measured the influence of each variable on the introduction intention by verifying the relationship between the independent variables and the dependent variables through structural equation model. Second, this study has defined the independent variable(strategic value perception, environment), dependent variable(introduction intention) and regulatory variable(type of business and corporate size) about big data introduction intention and has arranged theoretical base in studying big data related field empirically afterwards by developing measurement items which has obtained credibility and validity. Third, by verifying the strategic value perception factors and the significance about environmental factors proposed in the conventional precedent studies, this study will be able to give aid to the afterwards empirical study about effect factors on big data introduction. The operational implications are as follows. First, this study has arranged the empirical study base about big data field by investigating the cause and effect relationship about the influence of the strategic value perception factor and environmental factor on the introduction intention and proposing the measurement items which has obtained the justice, credibility and validity etc. Second, this study has proposed the study result that the strategic value perception factor affects positively the big data introduction intention and it has meaning in that the importance of the strategic value perception has been presented. Third, the study has proposed that the corporation which introduces big data should consider the big data introduction through precise analysis about industry's internal environment. Fourth, this study has proposed the point that the size and type of business of the corresponding corporation should be considered in introducing the big data by presenting the difference of the effect factors of big data introduction depending on the size and type of business of the corporation. The political implications are as follows. First, variety of utilization of big data is needed. The strategic value that big data has can be accessed in various ways in the product, service field, productivity field, decision making field etc and can be utilized in all the business fields based on that, but the parts that main domestic corporations are considering are limited to some parts of the products and service fields. Accordingly, in introducing big data, reviewing the phase about utilization in detail and design the big data system in a form which can maximize the utilization rate will be necessary. Second, the study is proposing the burden of the cost of the system introduction, difficulty in utilization in the system and lack of credibility in the supply corporations etc in the big data introduction phase by corporations. Since the world IT corporations are predominating the big data market, the big data introduction of domestic corporations can not but to be dependent on the foreign corporations. When considering that fact, that our country does not have global IT corporations even though it is world powerful IT country, the big data can be thought to be the chance to rear world level corporations. Accordingly, the government shall need to rear star corporations through active political support. Third, the corporations' internal and external professional manpower for the big data introduction and operation lacks. Big data is a system where how valuable data can be deducted utilizing data is more important than the system construction itself. For this, talent who are equipped with academic knowledge and experience in various fields like IT, statistics, strategy and management etc and manpower training should be implemented through systematic education for these talents. This study has arranged theoretical base for empirical studies about big data related fields by comprehending the main variables which affect the big data introduction intention and verifying them and is expected to be able to propose useful guidelines for the corporations and policy developers who are considering big data implementationby analyzing empirically that theoretical base.