• 소성∙가공
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• 제29권5호
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• pp.251-256
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• 2020

The purpose of this study is to investigate the effect of sintering condition on the microstructure evolution and tensile properties of the Ti-6Al-4V alloy sample processed by metal injection molding (MIM) in terms of the sizes of the alpha morphology and pore found in the matrix. For this purpose, a series of MIM were conducted on this sample at various sintering temperatures ranging from 1173 to 1373 K for three hours followed by furnace cooling, observed by the scanning electron microscopy. The microstructures sintered in this study showed that, with increasing sintering temperature over beta transus temperature, the transformation of the equiaxed alpha into transformed beta was attained while the size of pores would tend to decrease. Thus, the strength remained unchanged significantly in the tension while ductility increased to some extent as sintering temperature increased. Such mechanical behavior would be explained in relation to the microstructure evolution of the Ti-6Al-4V sample via the MIM.

• 반도체디스플레이기술학회지
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• 제13권4호
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• pp.15-20
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• 2014

The fracture analysis of $SiN_x$ layers, which were deposited by low-temperature plasma enhanced chemical vapor deposition (LT-PECVD) and could be used for an encapsulation layer of a flexible organic light emitting display (OLED), was performed by an electrical method. The specimens of metal-insulator-metal (MIM) structure were prepared using Pt and ITO electrodes. We stressed MIM specimen mechanically by bending outward with a bending radius of 15mm repeatedly and measured leakage current through the top and bottom electrodes. We also observed the cracks, were generated on surface, by using optical microscope. Once the cracks were initiated, the leakage current started to flow. As the amount of cracks increased, the leakage current was also increased. By correlating the electrical leakage current in the MIM specimen with the bending times, the amount of cracks in the encapsulation layer, generated during the bending process, was quantitatively estimated and fracture behavior of the encapsulation layer was also closely investigated.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2006년도 제37회 하계학술대회 논문집 C
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• pp.1587-1588
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• 2006

Tn this paper, PCB (Printed Circuit Board) embedded $BaTiO_3$ MIM capacitors were designed, fabricated, and characterized for low cost organic SOP applications by using 3-D EM simulator and low temperature processes. Size of electrodes and thickness of high dielectric films are optimized for improving the performance characteristics of the proposed embedded MIM capacitors at high frequency regime. The selected thicknesses of the $BaTiO_3$ film are $12{\mu}m$, $16{\mu}m$, and $20{\mu}m$. The fabricated MIM capacitor with dielectric constant of 30 and thickness of $12{\mu}m$ has capacitance density of $21.5p\;F/mm^2$ at 100MHz, maximum quality factor of 37.4 at 300 MHz, a quality factor of 30.9 at 1GHz, self resonant frequency of 5.4 GHz, respectively. The measured capacitances and quality factors are well matched with 3-D EM simulated ones. These embedded capacitors are promising for SOP based advanced electronic systems with various functionality, low cost, small size and volume.

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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• pp.39-40
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• 2006

The relationship between the powder particle size change and a mechanical property of the Metal Injection Molding (MIM) product was examined in detail. The XRD results indicate that the diffraction peaks of BCC appeared in compacts of powder particle size of 4 to $10{\mu}m$ as well as the bulk SUS630. However, the diffraction peaks from both BCC and FCC were observed in the compact with powder size less than $3{\mu}m$. TEM observation revealed that the powder with those BCC/FCC two phase structure have a finely dispersed $SiO_2$ precipitates. Because the Si is ferrite stabilizing element, decrease of Si composition in the matrix phase by the $SiO_2$ precipitation resulted in formation of the retained austenite. Therefore, controlling the elements such as Si as well as oxygen decrease is very important to obtain a normal microstructure in ultra-fine powder $(<3{\mu}m)$ injection molding.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2003년도 추계학술대회 논문집 Vol.16
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• pp.400-403
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• 2003

Recently, the study on development of electrical and electronic device is done to get miniature, high degrees of integration and efficiency by using inorganic materials. the study of Langmuir-Boldgett(LB) method that uses organic materials because of the limitation for the ultra small size. In this paper, detected displacement current using PBLG and PBDG, deposition and observed the electrical characteristics to each 1, 3, 5, 7, 9 layers by LB method. Maximum value of change ratio of displacement current by the detected speed and temperature appeared almost lineally, could confirm that it are in comparison relation each other speed temperature and displacement current. The structure of manufactured device is MIM. Also, we then examined of the MIM device by means of I-V. The I-V characteristic of the device is measured from 0 to +2[V]. The insulation property of a thin film is better as the distance between electrodes is larger.

• 경영과정보연구
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• 제38권4호
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• pp.1-24
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• 2019

본 연구는 MIM(Mobile Instant Messenger) 서비스에서 소비자들이 구매하는 이모티콘 번들의 구성을 개인이 선택 가능토록 하는 맞춤화(customization)를 하는 것에 대한 소비자들의 반응을 설문을 통해 확인함으로써, 이모티콘 시장에서 맞춤 번들링이 유효한 마케팅 전략인지를 증명하고자 한다. 현재 국내 MIM 서비스에서 이용되는 이모티콘은 순수 번들링의 형태이다. 이에 따라 이모티콘 번들 내에 포함된 모든 이모티콘을 사용하지 않음에도 필요한 이모티콘만 따로 구입이 불가능하기 때문에 어쩔 수 없이 번들 전체를 구입해야 한다. Hitt and Chen (2005)과 Wu and Anandalingam (2002)은 소비자가 순수 번들링에 포함된 제품 및 서비스 중 일부만 가치있게 생각한다면 맞춤 번들링이 훨씬 수익성이 좋음을 증명하여 순수 번들링의 대안으로서 제시한 바 있다. 맞춤 번들링은 한계비용이 0에 가까운 상품일 때 적합한데, 이모티콘과 같은 정보재의 경우 이러한 조건을 충족한다. 반면, 맞춤 번들링은 선택 가능한 옵션을 증가시키기 때문에 복잡성의 문제를 낳을 수 있고(Blecker et al., 2004), 소비자는 정보의 과부화를 겪게 될 수도 있다(Huffman & Kahn, 1998). 따라서 맞춤 번들링 도입 필요성에 대한 판단은 상품의 특성 및 소비자들의 반응에 대한 실증적 분석을 통해 이루어질 필요가 있다. 설문조사를 통해 얻은 자료를 분석한 결과, 맞춤 번들링을 도입하였을 때, 소비자들의 구매의도와 지불의 사금액은 유의하게 증가하였다. 맞춤 번들에 대한 구매의도는 기존 순수 번들에 대한 구매의도보다 리커트 5점척도 기준으로 0.44 정도가 증가하였다. 구매의도의 증가 정도는 기존에 순수 번들을 구매한 경험의 유무에 따른 차이가 없는 것으로 확인되었다. 기존에 순수 번들 구매 경험이 없는 그룹의 경우는 50% 정도의 응답자가 맞춤 번들의 구매의향을 밝힌 것으로 확인되었다. 반면 구매 경험이 있는 그룹에서는 87% 응답자가 구매의향을 밝힌 것으로 나타났다. 지불의사금액은 전체 그룹에서 기존 이모티콘 가격 대비 약 2.8% 증가하였다. 기존 구매경험에 따라 분류하여 분석하면, 구매 경험이 있는 그룹에서는 5.9% 증가하였고 구매 경험이 없는 그룹은 기존 가격 대비 약 5%가 싸다면 살 의향이 있는 것으로 나타났다. 종합적으로 이모티콘 번들에 맞춤 번들링을 도입하는 것은 소비자의 긍정적 반응을 이끌어낼 수 있으며, 실무적으로도 유효한 마케팅 전략이 될 수 있을 것으로 판단된다.

• 한국도로학회지:도로
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• 제4권1호
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• pp.40-50
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• 2002

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part2
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• pp.758.2-758.2
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• 2006

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part2
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• pp.820-821
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• 2006

• 한국분말야금학회:학술대회논문집
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• 한국분말야금학회 2006년도 Extended Abstracts of 2006 POWDER METALLURGY World Congress Part 1
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• pp.517.1-517.1
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• 2006