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이순흠(Sunheum Lee) 한국정보기술학회 2005 한국정보기술학회논문지 Vol.3 No.6
In this paper, Scanning Programs are implemented for SAM which conduct nondestructive testing inspection of integrated circuits packages and locate internal discontinuities. The implemented programs provide A, B, C-Scan and 3D display functions and a Multi-Layer Scan function scanning up to 20 layers. Various functions such as C-scan by amplitude, TOF, or phase inversion information, clustering function and etc. make it easy to detect the fatal defects such as delamination, crack, and void.
이순흠(Sunheum Lee),최관순(Kwansun Choi),김동식(Dongsik Kim),한승택 한국정보기술학회 2006 한국정보기술학회논문지 Vol.4 No.3
It is very important to understand the usage of experiment units and to manipulate those well. But due to the limitation of access to experiment units and allowed time, effectiveness of experimental education might not be attained enough. To investigate the effectiveness of the multimedia contents as a pedagogical tool for a preliminary education for experiments, a post-experiment review is conducted for groups of freshmen-year engineering students participating in a digital system experiment class. Post-experiment review results showed that the developed multimedia contents helped students easily understand the usages of the digital lab kit and manipulate the real digital lab kit well without hesitation.
이순흠(Sunheum Lee),전흥구(Heunggoo Jun),유석기(Sukki Yoo),이원흠(Wonheum Lee) 한국정보기술학회 2003 한국정보기술학회논문지 Vol.1 No.2
In this thesis. we implemented a ultrasonic computer tomography system for inspecting wood. The implemented system effectively reconstructed the cross section image of w∞d in which damages such as cracks and corrosion could exist. The implemented system can be used to get useful information about the inner states of original treasure made up of wood and contributed to the preservation of vailable cultural assets.
이순흠(Sunheum Lee) 한국정보기술학회 2006 한국정보기술학회논문지 Vol.4 No.6
In this paper, Focused ultrasonic transducers are developed for semiconductor inspection. It is effective for the focused ultrasonic transducer to be equipped with a spherically curved circular disc oscillator. In this paper, the transducers has the same specification of the oscillator diameter 3mm, the radius of curvature of the oscillator 8 mm, and the nominal frequency 110 ㎒. The transducers show good characteristics in terms of the ultrasonic R/F signal back from a reflector and its frequency characteristics. But there were a few transducers having bad characteristic among the passed transducers, which then means that the ultrasonic R/F signal back from a reflector and its frequency characteristics can not be used as criteria of the characteristics evaluation.
이순흠(Sunheum Lee),김원겸(Wonkyum Kim),최관순(KwanSun Choi),김동식(DongSik Kim),안영두(YoungDoo Ahn) 한국정보기술학회 2007 한국정보기술학회논문지 Vol.5 No.1
In this paper, an effective A-Scan program for a Nondestructive Testing System has been implemented on the basis of the requirement analyses of A-Scan program. Data gate, multi-gate, interface gate and phase gate are proposed and implemented, which enhance the user-friendliness, performance and reliability of the A-Scan program, and which then lead to the perfomance enhancement of the Nondestructive Testing System.
자동 이송장치를 갖춘 반도체 검사용 비파괴 검사장비 개발
이순흠(Lee SunHeum),최관순(Choi KwanSun) 한국정보기술학회 2006 한국정보기술학회논문지 Vol.4 No.5
In this paper, a Nondestructive Testing System has been developed, which can effectively detect the fatal defects such as delamination, crack, and void. Functions such as A/B/C-Scan, 3D display, a Multi-Layer Scan scanning up to 20 layers and clustering are available, with user-friendly interface. Also a high performance scanner equipped with a auto-loading device and a bubble auto-clearing device considerably enhances the quality, speed and reliability of inspections.
이순흠(Sunheum Lee),최관순(Kwansun Choi) 한국정보기술학회 2006 Proceedings of KIIT Conference Vol.2006 No.-
본 논문에서는 초음파를 이용하여 비파괴적으로 검사체 내부의 들뜸, 깨짐, 기공과 같은 검사체 성능에 치명적인 결함을 효과적으로 검출할 수 있는 검사 장비를 개발하였다. A/B/C-scan 및 3차원 영상을 제공하며, 다양한 기능 및 편의성이 증대된 사용자 인터페이스를 제공한다. 또한 고성능 스캐너 장비 및 검사체 자동 로딩장치와 자동 기포제거 장치를 개발하여 검사의 질과 속도와 신뢰성을 제고하였다. In this paper, a scanning acoustic microscope been implemented which can effectively detect the fatal defects such as delamination, crack, and void. Functions such as A/B/C-Scan with user-friendly interface. Also a high performance scanner equipped with a autoloading device and a bubble auto-clearing device considerably enhances the quality, speed and reliability of inspections.
웹기반 기초 전기회로 가상실험실의 교육효과 및 효과적 활용법
이순흠(Sun-Heum Lee),한재용(Jae-Yong Han),최관순(Kwan-Sun Choi),김동식(Dong-Sik Kim) 한국정보기술학회 2009 한국정보기술학회논문지 Vol.7 No.5
In this paper, we have analyzed the education effect of a implemented web-based virtual laboratory for basic electrical circuits on the real experiments which aims at improving the basic electrical experiment education process. One group using the virtual laboratory for the pre-report has shown better performance in the real experiment than the other group using textbooks traditionally, reducing the average experiment time by 6.5%. This proves the contents in this paper such as the concept explanation-oriented animations relating theoretical concepts with practical ones about experiments, interactive simulated electronic instruments and virtual experiment circuits with user-friendly graphic interface to be educationally effective. The virtual laboratory can be used as more effective teaching and learning tools because it has characteristics that not only provide the learning room encouraging the learners to do self-leading learning but also facilitate instructors' role as advisers of learning under the current circumstances of learners' problem-solving capability and creative thinking power.