열압착법을 이용한 경.연성 인쇄회로기판 접합부의 접합 강도에 미치는 접합 조건의 영향

이종근,고민관,이종범,노보인,윤정원,정승부,Lee, Jong-Gun,Ko, Min-Kwan,Lee, Jong-Bum,Noh, Bo-In,Yoon, Jeong-Won,Jung, Seung-Boo 한국마이크로전자및패키징학회 2011 마이크로전자 및 패키징학회지 Vol.18 No.2

We investigated effects of bonding conditions on the peel strength of rigid printed circuit board (RPCB)/ flexible printed circuit board (FPCB) joints bonded using a thermo-compression bond method, The electrodes on the FPCB were coated with Sn by a dipping process. We confirmed that the bonding temperature and bonding time strongly affected the bonding configuration and strength of the joints. Also, the peel strength is affected by dipping conditions; the optimum dipping condition was found to be temperature of $270^{\circ}C$ and time of 1s. The bonding strength linearly increased with increasing bonding temperature and time until $280^{\circ}C$ and 10s. The fracture energy calculated from the F-x (Forcedisplacement) curve during a peel test was the highest at bonding temperature of $280^{\circ}C$. 본 연구에서는 interlayer로 Sn을 사용하여 경성 인쇄 회로 기판(Rigid printed circuit board, RPCB)과 연성 인쇄 회로 기판(Flexible printed circuit board, FPCB) 간의 열압착 접합(Thermo-compression bonding) 조건을 최적화하는 연구를 진행하였다. 접합에 앞서 FPCB를 다양한 온도와 시간조건 하에서 Sn이 용융된 솔더 배스 안에서 침지(Dipping) 공정을 수행하였고, 열압착법을 이용하여 FPCB와 RPCB의 접합을 수행하였다. FPCB/RPCB 접합부의 접합 강도를 $90^{\circ}$ 필 테스트(Peel test)를 이용하여 측정하였다. 그 결과 $270^{\circ}C$, 1s의 침지 조건에서 FPCB의 polyimide(PI)와 Cu 전극 계면에서 파단되고, 이때, 최대 박리 강도를 얻었다. FPCB와 RPCB의 열압착 접합시 주요 변수로는 압력, 온도, 시간이 있으며, 특히 온도의 증가에 따라 접합 강도가 크게 증가하였다. 접합부 계면 관찰 결과, 접합 온도와 시간이 증가함에 따라 접합 면적이 증가하였으며, 이로 인해 접합 강도가 증가하는 것으로 사료된다. 필 테스트 과정에서 나타나는 F-x(Forcedisplacement) 곡선을 토대로 산출한 파괴 에너지와 접합 강도는 $280^{\circ}C$, 10s의 접합 조건에서 가장 높게 나타났으며, 이 조건이 최적 접합 조건으로 도출되었다.

솔더 접합부에 생성된 Void의 JEDEC 규격과 기계적 특성에 미치는 영향

이종근,김광석,윤정원,정승부,Lee, Jong-Gun,Kim, Kwang-Seok,Yoon, Jeong-Won,Jung, Seung-Boo 한국마이크로전자및패키징학회 2011 마이크로전자 및 패키징학회지 Vol.18 No.4

Understanding the void characterization in the solder joints has become more important because of the application of lead free solder materials and its reliability in electronic packaging technology. According to the JEDEC 217 standard, it describes void types formed in the solder joints, and divides into some categories depending on the void position and formation cause. Based on the previous papers and the standards related to the void, reliability of the BGA solder joints is determined by the size of void, as well as the location of void inside the BGA solder ball. Prior to reflow soldering process, OSP(organic surface preservative) finished Cu electrode was exposed under $85^{\circ}C$/60%RH(relative humidity) for 168 h. Voids induced by the exposure of $85^{\circ}C$/60%RH became larger and bigger with increasing aging times. The void position has more influence on mechanical strength property than the amount of void growth does.

희석제 첨가에 의한 에폭시수지의 물성 및 경화특성

이종근(Jong-Gun LEE),한승재(Seung-Jae HAN),정태영(Tae-Yeong JEONG) 한국수산해양교육학회 2019 水産海洋敎育硏究 Vol.31 No.5

For the Purpose of Development of Low Viscosity Epoxy Resin for Small Boats and Leisure Boats, Curing Behavior and Mechanical Properties of Epoxy Resin Diluents were added to control processability were investigated. Viscosity of Epoxy Resin was reduced with Lauryl alchol Glycidyl Ether(LGE), Butyl Glycidyl Ether(BGE) and Dicyclopentadiene(DCPD) content increased. The Minimum Viscosity of 20wt% Addition was results. As Less amount of Diluents was use and cured the Mixture at higher Temperature, the shorter Curing Time was Required. The higher the Curing temperature, the higher the surface hardness, tensile strength and Impact strength. When DCPD was used as a diluent, surface hardness, tensile strength and impact strength were lower than BGE and LGE. BGE and LGE showed similar values. The viscosity decreased with used of diluents. But surface hardness, tensile strength and impact strength were about 10 ~ 15% lower than without diluents.

중복순열 기법을 통한 몰드변압기 설계 자동화와 최적화에 관한 연구

이종근(Jong-Gun Lee),진홍우(Hong-Woo Jin),육심현(Sim-Hyeon Yuk) 대한전기학회 2023 대한전기학회 학술대회 논문집 Vol.2023 No.7

EU의 IUU 어업 예비 비협력 제3국 지정에 대한 대응방안 연구

이종근(Jong-Gun LEE) 한국수산해양교육학회 2015 水産海洋敎育硏究 Vol.27 No.4

In the results of analyzing Korean corrective action for what are required to be improved according to EU listing Korea as yellow-card non-cooperating third countries against IUU fishing, in order to establish advanced fishery order, it is thought that the following additional improvements are required. ① The introduction of integrated management system of fishing vessel sailing route, fishing activity, fish catch, and inshore fishing vessel must be considered. ② It is necessary to establish a system to cross check catch transaction, catch landing, and fish catch report submitted by fishing vessel. ③ Catch transshipment approval system shall be introduced. And a system of reporting and checking catch transshipment at sea shall be reinforced. ④ Punishment shall be strengthened to the extent of making people to perceive that loss due to punishment is larger than profit made from illegal fishing. ⑤ It shall be so improved that more than a certain percentage of all vessels with fish and fish products caught in waters outside Koreas judicial waters shall be arbitrarily chosen and searched besides a case of being suspected to be IUU fishing. In conclusion, on being listed by EU as yellow-card non-cooperating third countries against IUU fishing, Korean fishery management system shall be generally reexamined, and it shall serve as an occasion to exterminate IUU fishing and to advance fishery management system.

Ni계 filler metal을 이용한 진공브레이징 접합시 304 및 316 스테인레스강의 브레이징 특성 평가

이종근(Jong-Gun Lee),박현준(Hyun-Joon Park),이원배(Won-Bae Lee),정승부(Seung-Boo Jung) 대한용접·접합학회 2017 대한용접학회 특별강연 및 학술발표대회 개요집 Vol.2017 No.11

어선표식제도의 적정성에 관한 연구

이종근(Jong-Gun LEE),김형석(Hyung-Seok KIM) 한국수산해양교육학회 2012 水産海洋敎育硏究 Vol.24 No.1

In order to establish order in fishing industry by cracking down on illegal fishing vessels effectively, it is an essential requirement to identify marking such as the name of fishing vessel and a port of register more easily. Accordingly, it is quite natural that markings on fishing vessels should be marked clearly in an appropriate size on an appropriate site in order for them to be distinguished on the air such as from planes as well as on the sea. Actually, when examining marks such as the name of a vessel which are operating in the country, marks of most fishing vessels are too small as they cannot be distinguished with the naked eye even very closely. There is no coastal fishing vessel which marks the name of fishing vessel on the upper part in order to distinguish it from planes. Fishing vessel law generally which regulates the basic laws about shipbuilding regulates marks on fishing vessel, and fisheries law only regulates sign boards of fishing vessels. Problems and improvement of the marking system on fishing vessels suggested by this paper are as follows. First, in order to contribute to establish order in fishing industry, it would be desirable to tighten standards in fisheries law besides the fishing vessel law. Second, it is difficult to distinguish marks such as the name of a vessel as relevant laws allow fishers to make such marks too small. It is necessary to set the standard for marks larger than those regulated by the international treaty. Third, the relevant laws do not regulate a letter form of marks. Therefore, it becomes a factor to make small marks hard to be distinguished more. It is necessary to decide a clear letter form. Fourth, there is insufficient detailed international standards about the marking system. It is necessary to regulate a detailed standard.

ITQs의 도입을 위한 제도적 정비 방안 연구

이종근(Jong-Gun LEE) 한국수산해양교육학회 2014 水産海洋敎育硏究 Vol.26 No.1

Although South Korea had managed fishery resources based on elements included in the fishery like fisheries licence, after agreeing on UN Convention on the law in 1999, it became inevitable to adopt TAC that regulates yield. Therefore, currently operating an indecisive system by maintaining the fisheries license system while applying TAC only to some fisheries. However, it became imperative to find ways to improve the current system as it dose not solve problems such as decrease of fishery resources and catch per unit effort, excessive input of fishing boats, rising costs for fishery management, and shortage of fishery population. For those reasons, it is time to review ITQs, which is recognized globally as the most innovative fisheries management system. To adopt the ITQs, it seems necessary to compare how the fisheries act of New Zealand which is currently most successfully operated and Fisheries Resources Management Act of Korea. To do so, in this study, the provisions on TAC of the two countries are compared to analyze the institutional necessity for Korea to adopt ITQs. The following conclusions have been made : First, it will be necessary to gradually expand the species and fisheries for which TAC is enforced, and accumulate correct data on fisheries resources. Second, while forcing traders to obtain license as well, the species and quantity of traded fisheries must be reported separately for cross-checking with the catch reported by the fisheries. Third, the number of observers must be increased and report the species and quantity of the catch to person in charge at the relevant port, and observers must check the report before disembarkation. Fourth, penalty for violating Fisheries resources management act must be enhanced, especially regarding false report of fishery activities and catch.

미국의 어획실적관리제도에 관한 연구

이종근(Jong-Gun LEE) 한국수산해양교육학회 2017 水産海洋敎育硏究 Vol.29 No.4

For the continuous management of fishery, on top of the accurate research on fishery resources and accurate calculation of optimum catch, the optimum catch should be thoroughly managed within the limitation. Due to the insufficient perception of necessity of fishery performance report & confirmation system of Korea, it is certainly needed to be improved. In order to seek for improvement measures of Korean fishing performance management system, the US fishing performance management system which has been recognized as the most advanced fishing performance management system was analyzed. In the results of analyzing the fishing performance management system of Washington and Alaska, the main points are like below. First, the Washington State managing the fishing performance focusing on the traditional fishing performance management system,“Fish Tickets” is calculating its fishing performance by combining the fishing performance reported by fishing boats, data researched by researchers working for ports of discharge, fisheries diary, and fishery product wholesalers purchase data. Second, in the Washington State, regarding fish species for the individual quota system, the fishing performance should be reported right after completing the fishing activity by using ‘E-Fish Ticket’, a method to report purchase performance through internet. Third, the Alaska State has introduced IERS as a system to report all the fishery activities and fishing performance through internet since 2001. As this system integrates all sorts of fishing & unloading performances reported by fishing boats, marine & land observers, and distributors for the mutual comparison, the fishing performance could be accurately understood in time. In order to increase the relatively low reliability of fishing performance reporting data of Korea, it would be necessary to establish the improvement measures by referring to the US cases.

Poly-DCPD 함유 에폭시수지의 제조 및 기계적 특성 연구

이종근(Jong-Gun LEE),민경철(Kyong-Cheol MIN),한승재(Seung-Jae HAN) 한국수산해양교육학회 2017 水産海洋敎育硏究 Vol.29 No.5

For the purpose of development of DCPD epoxy resin for small boats, the effect of additives on the impact strength, flexural strength and surface hardness of the poly-DCPD epoxy resin were systematically investigated. Curing agents, G-5022 and G-0930 were adapted and used separately and together. The effects of curing agents, their added amount, and synergic effect of curing agents were experimentally examined. The impact strength and flexural strength as the usage increases the curing agent was increased, but the theoretical amount of 1.6 times or more showed consistent results. and, curing agent G-0930 was impact strength, G-5022 was flexural strength showed of high value. The optimum conditions were curing agents mixture(G-0930:G-5022) in a weight ratio of 50:50, added amount of 1.6 times, curing temperature 50℃, which is a curing time of 24 hours. Impact strength, flexural strength and surface hardness was in this condition.