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펄스-역펄스 전착법을 이용한 SiP용 via의 구리 충진에 관한 연구
배진수,장근호,이재호,Bae J. S.,Chang G H.,Lee J. H. 한국마이크로전자및패키징학회 2005 마이크로전자 및 패키징학회지 Vol.12 No.2
SiP의 3D패키지에 있어서 구리도금은 매우 중요한 역할을 한다 이러한 구리 도금의 조건을 알아보기 위하여 조건이 다른 전해질에서 전기화학적 I-V특성을 분석하였다. 첨가제로 억제제와 촉진제의 특성을 분석하였다. 3D 패키지에 있어서 직경 50, 75, $100{\mu}m$의 via를 사용하였다. Via의 높이는 $100{\mu}m$로 동일하였다. Via의 내부는 확산방지층으로 Ta을 전도성 씨앗층으로 Cu를 magnetron 스퍼터링 방법으로 도포하였다. 직류, 펄스, 펄스-역펄스 등 전류의 파형을 변화시키면서 구리 도금을 하였다. 직류만 사용하였을 경우에는 결함 없이 via가 채워지지 않았으며 펄스도금을 한 경우 구리 충진이 개선을 되었으나 결함이 발생하였다. 펄스-역펄스를 사용한 경우 결함 없는 구리 충진층을 얻을 수 있었다. Electroplating copper is the important role in formation of 3D stacking interconnection in SiP (System in Package). The I-V characteristics curves are investigated at different electrolyte conditions. Inhibitor and accelerator are used simultaneously to investigate the effects of additives. Three different sizes of via are tested. All via were prepared with RIE (reactive ion etching) method. Via's diameter are 50, 75, $100{\mu}m$ and the height is $100{\mu}m$. Inside via, Ta was deposited for diffusion barrier and Cu was deposited fer seed layer using magnetron sputtering method. DC, pulse and pulse revere current are used in this study. With DC, via cannot be filled without defects. Pulse plating can improve the filling patterns however it cannot completely filled copper without defects. Via was filled completely without defects using pulse-reverse electroplating method.
선박용 펌프에서의 Mechanical Seal 손상사례
박성호(S. H. Park),신동표(D. P. Shin),배진수(J. S. Bae),이희장(H. J. Rhee),정현기(H. G. Jung),박태조(T. J. Park) 한국트라이볼로지학회 2005 한국트라이볼로지학회 학술대회 Vol.2005 No.11
Seals are very important devices to prevent leakage of fluid. In rotary mechanisms, seals of different types are used as sealing devices. Mechanical seals are employed when they operate under critically severe conditions. In this paper, failure modes and types of pumps installed in commercial ships and problems of rnecharu, al seal adopted are investigated to improve pumping performances and sealing reliabilities. Life cycle of mechanical seals used for fuel oil supply pumps are very short because they used heavy fuel oil which contains very high foreign materials. Leakage in mechanical seal is caused mainly by failure of sealing face.
김찬희(C. H. Kim),정희택(H. T. Chung),배진수(J. S. Bae) 한국동력기계공학회 2007 한국동력기계공학회 학술대회 논문집 Vol.- No.-
Piping systems in steam-driven power engines are heated and pressurized by superheated steam. In this process, piping systems are deformed by high temperature and high pressure. These deformations occur damage on piping systems itself or peripheral equipment. The present study is aimed at estimating the deformation of piping systems and optimizing the arrangement of pipe supports using finite element method. The rearrangement of the initially-designed pipe supporters is suggested through the comparison of the deformation results.
김찬희(C. H. Kim),정희택(H. T. Chung),배진수(J. S. Bae),이준호(J. H. Lee),이석순(S. S. Lee) 대한기계학회 2007 대한기계학회 춘추학술대회 Vol.2007 No.11
The piping systems in the steam-driven power engines lie under the cyclic condition of thermal expansion and contraction by superheated steam. These phenomena might cause some severe damages on the pipes and the accessory devices. To avoid these damages, the calculation of the proper strength and the consideration of the reduced resultant forces on the materials are needed. In the present study, numerical investigations on the effects of the thermal deformation of the industrial piping system were performed with comparison of the design data. Commercial software, ABAQUS with the thermal-fluidic loadings based on the design conditions was used for the thermal stress analysis of the piping system and the experimental design was used for the rearrangement of the initially-designed pipe supporters.