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반창우(Chang-Woo Ban),장동영(Dong-Young Jang) 한국생산제조학회 2012 한국생산제조학회지 Vol.21 No.3
Recently RFID(Radio Frequency Identification) technology advances in wireless communication technologies are bringing new challenges. But RFID tag packaging technology has been lagging compared to the demand, so this technology is being required to improve productivity and reliability. This study is performed on FMEA, reliability at development level and analysis failure mode through environment and mechanical test. Robust design is applied to search the optimized condition of factor and RFID tag packaging should be satisfied with high MTTF.
기밀성 분석을 통한 RFID 태그 패키지 에폭시 몰딩 연구
반창우(Chang-Woo Ban),홍석기(Seok-Kee Hong),장동영(Dong-Young Jang) 한국생산제조학회 2012 한국생산제조학회지 Vol.21 No.2
Recently RFID (Radio Frequency Identification) technology advances in wireless communication technologies are bringing new challenges. But RFID tag packaging technology has been lagging compared to the demand, so this technology is being required to improve reliability. In this paper, reliability comparison among 11 types of most commonly used epoxy molding in electrical/electronic components packaging has been made through analysis of confidentiality using a humidity sensor. Consequently, the variation of moisture penetration time causes has been verified by the changes in molding thickness for 3 types of epoxy, and from the result, the best experimental results were observed in terms of confidentiality. Moreover we have been confirmed the relationship between confidentiality, the molding thickness, and thermal property of epoxy through thermal analysis.
반창우(Chang-Woo Ban),홍석기(Seok-Kee Hong),장동영(Dong-Young Jang) 한국생산제조학회 2008 한국생산제조시스템학회 학술발표대회 논문집 Vol.2008 No.10
반도체, LCD, 휴대폰과 같이 제품 원가에 비해 고부가가치 제품 산업들은 급속한 발전과 새로운 서비스 요구로 인해 제품의 생산에 있어서 제조 스피드가 관건이다. 본 연구에서는 복잡하고 다양한 반도체 프로세스 중에서 Track - Aligner - Oxide Etcher - Asher - Sputter - Microscope 프로세스의 모델링을 통하여 평균 생산 시간과 처리량을 측정하여 처리량을 극대화 할 수 있는 생산 시간의 최적화에 대해 고찰하였다.
양시은(Si-Eun Yang),반창우(Chang-Woo Ban),장동영(Dong-Young Jang),홍석기(Seok-kee Hong) 한국생산제조학회 2010 한국공작기계학회 추계학술대회논문집 Vol.2010 No.-
In this paper, the hermetic packaging which has a huge share in packaging process cost has been defined by confidentiality, and the confidentiality of sealing using epoxy has been compared. The reliability depending on the humidity of electronic component has been stipulated as the confidentiality of the package, and the sealing process has been analyzed by the leak rate absorbed from the outside of the electronic component. The leak sensitivity of epoxy sealing measurement method using humidity sensor is proposed, by which it is possible to analyze the leak rate of the product in the development stage. In addition the decision on epoxy sealing packaging method is became possible.
장동영(Dong-Young Jang),반창우(Chang-Woo Ban),임영환(Young-Hwan Lim),홍석기(Suk-Ki Hong) 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.9
In this paper, bonded wafer analysis system is proposed using laser beam transmission; while the transmission model is derived by simulation. Since the failure of bonded wafer stems in void existence, transmittance deviations caused by the thickness of the void are analyzed and variations of the intensity through the void or defect easily have been recognized then the testing power has been increased. In addition, large screen display on laser study has been done which resulted in acquiring a feasible technique for analysis of the whole bonding surface. In this regard, three approaches are demonstrated in which Halogen lamp, IR lamp and laser have been tested and subsequently by results comparison the optimized technique using laser has been derived.
도로 토목 공사 현장에서 UAV를 활용한 위성 영상 지도의 정확도 분석
신승민 ( Seung-min Shin ),반창우 ( Chang-woo Ban ) 한국산업융합학회 2021 한국산업융합학회 논문집 Vol.24 No.6
Google provides mapping services using satellite imagery, this is widely used for the study. Since about 20 years ago, research and business using drones have been expanding. Pix4D is widely used to create 3D information models using drones. This study compared the distance error by comparing the result of the road construction site with the DSM data of Google Earth and Pix4 D. Through this, we tried to understand the reliability of the result of distance measurement in Google Earth. A DTM result of 3.08 cm/pixel was obtained as a result of matching with 49666 key points for each image. The length and altitude of Pix4D and Google Earth were measured and compared using the obtained PCD. As a result, the average error of the distance based on the data of Pix4D was measured to be 0.68 m, confirming that the error was relatively small. As a result of measuring the altitude of Google Earth and Pix4D and comparing them, it was confirmed that the maximum error was 83.214m, which was measured using satellite images, but the error was quite large and there was inaccuracy. Through this, it was confirmed that there are difficulties in analyzing and acquiring data at road construction sites using Google Earth, and the result was obtained that point cloud data using drones is necessary.
양시은(Si-Eun Yang),반창우(Chang-Woo Ban),장동영(Dong-Young Jang),홍석기(Seok-kee Hong) 한국생산제조학회 2010 한국생산제조시스템학회 학술발표대회 논문집 Vol.2010 No.10
In this paper, the hermetic packaging which has a huge share in packaging process cost has been defined by confidentiality, and the confidentiality of sealing using epoxy has been compared. The reliability depending on the humidity of electronic component has been stipulated as the confidentiality of the package, and the sealing process has been analyzed by the leak rate absorbed from the outside of the electronic component. The leak sensitivity of epoxy sealing measurement method using humidity sensor is proposed, by which it is possible to analyze the leak rate of the product in the development stage. In addition the decision on epoxy sealing packaging method is became possible.
드론 LiDAR에 기반한 매핑 시스템의 고속도로 건설 현장 적용 사례
신승민 ( Seung-min Shin ),권오성 ( Oh-soung Kwon ),반창우 ( Chang-woo Ban ) 한국산업융합학회 2023 한국산업융합학회 논문집 Vol.26 No.6
Recently, much research is being conducted based on point cloud data for the growth of innovations such as construction automation in the transportation field and virtual national space. This data is often measured through remote control in terrain that is difficult for humans to access using devices such as UAVs and UGVs. Drones, one of the UAVs, are mainly used to acquire point cloud data, but photogrammetry using a vision camera, which takes a lot of time to create a point cloud map, is difficult to apply in construction sites where the terrain changes periodically and surveying is difficult. In this paper, we developed a point cloud mapping system by adopting non-repetitive scanning LiDAR and attempted to confirm improvements through field application. For accuracy analysis, a point cloud map was created through a 2 minute 40 second flight and about 30 seconds of software post-processing on a terrain measuring 144.5 x 138.8 m. As a result of comparing the actual measured distance for structures with an average of 4 m, an average error of 4.3 cm was recorded, confirming that the performance was within the error range applicable to the field.
반창우,홍석기,장동영 한국공작기계학회 2008 한국공작기계학회 추계학술대회논문집 Vol.2008 No.-
반도체, LCD, 휴대폰과 같이 제품 원가에 비해 고부가가치 제품 산업들은 급속한 발전과 새로운 서비스 요구로 인해 제품의 생산에 있어서 제조 스피드가 관건이다. 본 연구에서는 복잡하고 다양한 반도체 프로세스 중에서 Track - Aligner - Oxide Etcher - Asher - Sputter - Microscope 프로세스의 모델링을 통하여 평균 생산 시간과 처리량을 측정하여 처리량을 극대화 할 수 있는 생산 시간의 최적화에 대해 고찰하였다.