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스퍼터를 이용한 마이크로 니들의 니켈 코팅에 관한 연구
신홍규(Hong Gue Shin),조창연(Chang Yon Jo),김병희(Byeong Hee Kim) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
In this paper, DC magnetron sputter process for the deposition of conductive nickel coating on ultra-high aspect ratio(UHAR) micro probe pins for wafer inspection is described. Magnetron sputtering is the most widely used method for vacuum thin film deposition and serves over 90% of the market for sputter deposition. However, it has been known that it is hard to coat the UHAR micro structures because of its directional characteristics. Generally, UHAR coating results show lacks of uniformityand strength. In order to overcome these problems, it was suggested that the introduction of the tilting and rotating stage would likely make not only the uniformity and the strength of coating but also the easiness of post-soldering increase. Through various experiments and analyses, optimal coating conditions, such as a space between pins, a concentration of argon gas, a vacuum pressure and a current of DC targets could be obtained. Under optimal conditions, up to 1,200 probe pins with 150㎛ diameter, 7.3㎜ length can be cleaned and coated in about 20 minutes almost without any defect. Consequently, we proved that, compared with a wet coating, a dry coated probe pin will likely have a better performance, cost-effectiveness and yield.
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스퍼터를 이용한 마이크로 니들의 니켈 코팅에 관한 연구
신홍규(Hong Gue Shin),조창연(Chang Yon Jo),김병희(Byeong Hee Kim) 한국생산제조학회 2006 한국공작기계학회 춘계학술대회논문집 Vol.2006 No.-
In this paper, DC magnetron sputter process for the deposition of conductive nickel coating on ultra-high aspect ratio(UHAR) micro probe pins for wafer inspection is described. Magnetron sputtering is the most widely used method for vacuum thin film deposition and serves over 90% of the market for sputter deposition. However, it has been known that it is hard to coat the UHAR micro structures because of its directional characteristics. Generally, UHAR coating results show lacks of uniformityand strength. In order to overcome these problems, it was suggested that the introduction of the tilting and rotating stage would likely make not only the uniformity and the strength of coating but also the easiness of post-soldering increase. Through various experiments and analyses, optimal coating conditions, such as a space between pins, a concentration of argon gas, a vacuum pressure and a current of DC targets could be obtained. Under optimal conditions, up to 1,200 probe pins with 150㎛ diameter, 7.3㎜ length can be cleaned and coated in about 20 minutes almost without any defect. Consequently, we proved that, compared with a wet coating, a dry coated probe pin will likely have a better performance, cost-effectiveness and yield.
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趙昌衍 公州大學校 地域開發硏究所 1995 地域開發硏究論叢 Vol.3 No.1
The purposes of this study are to itentify locational types of the KIA auto parts industry and to find out the factors which influence location decision and change. For this purposes, subcontractors of KIA automobile company have been selected as research subjects to examine patterns and processes of locational changes. The results of the study are as follows; This study has also investigated location patterns of auto part companies which suppiled KIA. The results of the analysis confirms us that location of auto part companies supplied KIA are mostly located in the Seoul metropolitan area and other location decision factors is cheap land available for plant. Locational change factors are cheap land and need of JIT.
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技術變化와 産業立地 變化 : 自動車 部品 産業을 中心으로
趙昌衍 公州大學校 地域開發硏究所 1992 地域開發硏究論叢 Vol.1 No.1
1.The technological change processes of the automobile industry are followings : craft,mass and lean (flexible) production. The auto-parts plants located around the assmbly-plant in craft production and those dispersed to the lower-labor cost areas in order to reduce the production cost in mass production and those concentrated on the assembly-plant to deliver auto-parts in time. 2.The core area of the world auomobile industry are strongly concentrated in the develroped marked ecoomics, paricularly the United States, Japan and western Europe. Stage in the development of a country's automobile industry are four stages as follows. stage 1 : import of completely built-up (CUB) vehicle. stage 2 : assembly of completely knocked-down (CKD) vehicles from the home plant of world manufacturers. stage 3 : assembly of CKD vehicles with increasing locally made content. stage 4 : full scale manufacture of motor-vehicles. 3.The development of the Korean automobile industry is deeply associated with the planning of Economic development. 4.There are five assembly plant in our country, three of them are in metropolitian area and the rest south-eastern area, because the location of them are market-oriented. 5.In case of the United States, traditionally the assembly plants had located near the market, But recently assembly plant dispersed because of the development of production techniques and diversification of model. 6.According to the relationship between assembly and auto-part plant, the structure of the auto-parts industry is multi-layer pyramid type in Japan and horizontal labor division in the U.S.A and mixed type in Korea. 7.The distribution of auto-part industry are concerntred on the two region : the metropolitian, and south-eastern. the locational changes in Seoul area are suburbanization and dispersal and in Pusan suburbanization and dispersal to the Ulsan in U.S. a auto-parts industry is market oriented therefore, OEM are concerntred on the assembly-plant and after market dispersed to the public.
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自動車 部品工業의 空間的 特性 : 現代, 大宇, 起亞自動車의 部品業體를 中心으로
趙昌衍 公州大學校 地域開發硏究所 1996 地域開發硏究論叢 Vol.4 No.1
The purpose of this study is to identify spatial characteristics of the auto parts industry. The results of this study are as follows. 1. The distribution of the auto parts plant was deeply related to the location of assembly plant. 2. Subcontractors of Hyundai automobile company were mostly concentrated on the south-east region and those of Daewoo and Kia on the Seoul metropolitan area. 3. According to the distribution by the cummulative percentage of distance, 69% of auto parts companies supplying Hyundai are located within 150km from the Hyundai assembly company, however, 69.2% and 80.6% of auto parts companies supplying Daewoo and Kia, respectively, are located within 50km from each own assembly company.
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조창연 公州大學校 地域開發硏究所 1997 地域開發硏究論叢 Vol.5 No.1
The purpose of this study is to identify spatial characteristics of the electronic-components industry. The results of this study are as follows : 1. The distribution of the electronic-components plant was deeply related to the location of electronic assembly plant. 2. Subcontractors of SAMSUNG electronic company were mostly concentrated on the Seoul metropolitian area. Where as, those of LG evenly on the two region, Seoul metropolitian area and South-east region. 3. Locational factors of the electronic-components plant are deep linkage between components and assembly plant.
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