• Resources Recycling
• /
• v.32 no.1
• /
• pp.60-66
• /
• 2023

As supply chain management becomes a key factor in the sustainable growth of the industry, securing minerals at the national or corporate level is becoming important. Depending on the industrial structure, the economic status of each minerals is different and the supply risk is different In this study, to examine the economic status of minerals, an index that can quantify the Industrial Economic Importance by minerals was developed and calculated by reflecting the demand structure and cost weight of each industry. As a result, Li, Al, Cu, Si, Co, Ni, etc. were evaluated as having high industrial importance in Korea. In addition, by industry, Al, Cu, Zn, and Pb for primary metal manufacturing, general machinery, assembly metals,Sn, Ba, Ti, Si and Ga for precision equipment, Si and Ga for semiconductors, and Li, Ni, Co, Si, etc. for electronic components had high industrial importance. Such as Europe and the United States, in order to select Critical-minerals, Korea will need to analyze the economic impact on the domestic industry as well as the risks of supply chain by minerals.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.8 no.11
• /
• pp.1725-1732
• /
• 2013

This paper deals with an approach to boost the public sector SI market in Korea. In order to promote competition powers of the software industry in Korea, a software industry promotion law has been issued, which restricts large SI companies from competing in the public sector system integration market. However, naturally many SI projects in public sectors are too large and complicated to be carried by small and medium size companies. This paper proposes an approach to reform the SI market for those small and medium size SI companies.

• 전기산업
• /
• v.8 no.3
• /
• pp.17-29
• /
• 1997

• Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
• /
• 2001.07a
• /
• pp.186.2-189
• /
• 2001

요실리콘을 기반으로 하는 박막은 반도체 재료로 Si, Si:Ge, SiC등이 사용되고있으며, 절연박막재료로 SiN, SiOxNy, SiOx 등이 있다. 이들 재료는 국내 반도체 산업의 핵심위치에 있는 물질이다. 한국 산업의 근간이라 할 수 있는 메모리분야에 적용될 뿐만 아니라 TFT-LCD, 태양전지, 각종 센서, X-ray 사진 촬영기 개발에도 응용되고 있다. 본 논문에서는 Silicon-based 박막의 제조기법과 그에 따른 다양한 실리콘 박막 실리콘 트랜지스터를 이용한 능동형 액정과 유기발광 화소제어 활용, 센서 응용 부분에서 태양전지, X-ray 촬영기활용 분야에서 기술현황 시장분석을 통해 차세대 연구개발의 방향을 제시하고자 한다. 현재 국내에서 실리콘 박막의 가장 큰 응용 분야는 메모리 소자의 평판디스플레이의 TFT-LCD 시장이다. 그러나 실리콘 박막으로 가능한 응용분야는 아직 산업계에서 열매를 맺지 못한 분야가 더 많고 실제로 적용할 수 있는 분야의 다양함을 본 논문을 통해 소개한다.

• Journal of the Korean Crystal Growth and Crystal Technology
• /
• v.32 no.5
• /
• pp.169-174
• /
• 2022

This study is to verify the feasibility of SiC single crystal growth using recycled SiC powder. The fundamental physical properties such as particle size, shape, composition and impurities of the recycled powder were analyzed, and the sublimation behavior occurring inside the reactor were predicted using the basic data. As a result of comprehensive judgment, the physical properties of the recycled powder were suitable for single crystal growth, and single crystal growth experiments were conducted using this. 100 mm 4H-SiC single crystal ingot with a height of 25 mm was grown without polytype inclusion. In the case of micro-pipe density was 0.02 ea/cm² and resistivity characteristics was 0.015~0.020 ohm·cm², commercial level quality was obtained, but additional analysis related to dislocation density and stacking faults is required for device application.

• Journal of Industrial Technology
• /
• v.17
• /
• pp.233-239
• /
• 1997

The effects of preheating the gas stream on deposition characteristics of ultrafine $SiO_2$ particles were investigated theoretically. The model equations such as mass and energy balance equations and aerosol dynamic equations were solved to predict the particle growth and deposition. The gas temperatures, $SiCl_4$ concentrations, $SiO_2$ particle volumes, $SiO_2$ particle sizes and deposition efficiencies of $SiO_2$ particles were calculated for various preheating temperatures. As the preheater setting temperature increases, the $SiO_2$ particle size distribution becomes more uniform, because the effect of $SiCl_4$ diffusion decreases.

• Journal of the Korean Society of Industry Convergence
• /
• v.6 no.3
• /
• pp.201-205
• /
• 2003

The effects of adsorption and desorption of alkali-metals on Si(111) surface were investigated by using AES and RHEED-system. The adsorption system is a fundamental interest because of its unique electronic properties such as measurement of work function change, adatom-core level shift. It was found that the growth node of K on Si(111) surface was layer by layer growth and the saturation coverage was 2.0ML at room temperature. Superstructure changes on Si(111) surface according to the alkali-metal thickness and substrate temperatures were accurately defined. By applying the isothermal desorption method, the desorption energies of Li/Si(111) and K/Si(111) surfaces was measured. On Li/Si(111) and K/Si(111) surfaces, the desorption energies were 3.07 eV, 2.19 eV respectively.

• Resources Recycling
• /
• v.19 no.5
• /
• pp.44-49
• /
• 2010

SiC powders have been recovered from silicon-containing waste slurry by carbothermal reduction method with carbon black. Large amount of silicon-containing waste slurry is generated from Solar Cell industry. In an environmental and economic point of view, retrieve of the valuable natural resource from the silicon waste is important. In this study, SiC powder recovered by the reaction ball-milled silicon powder from waste and carbon black at $1350^{\circ}C$ for 3h under vacuum condition. Physical properties of samples have been characterized using SEM, XRD, Particle size analyzer and FT-IR spectroscopy.

• Journal of the Korean Society of Industry Convergence
• /
• v.20 no.2
• /
• pp.149-155
• /
• 2017

Mechanical properties of carbon coated $SiC_f/SiC$ composites have been investigated, in conjunction with a detailed analysis of microstructure. Especially, the fracture behavior of $SiC_f/SiC$ composites by the induction of carbon coating layers has been examined. The matrix region of $SiC_f/SiC$ composites with ultra-fine SiC powders were consolidated by a liquid phase sintering (LPS) process, using a sintering additive of $Al_2O_3-Y_2O_3$ powder compound. In this composite, plain and satin- woven Tyranno SA fabrics were also utilized as a reinforcing material. A carbon interfacial layer was coated around satin-woven SiC fabrics. The characterization of LPS-$SiC_f/SiC$ composites was investigated by means of SEM and three point bending test.

• 정보화사회
• /
• s.103
• /
• pp.59-61
• /
• 1996

시스템통합(SI)이란 소프트웨어, 하드웨어, 네트워크등 사용자요구에 적합한 솔루션을 적시에 제공하는 종합적인 정보서비스 체계를 의미한다. SI사업은 90년대 들면서 연평균 30-40% 급성장을 통하여 소프트웨어산업을 넘어 정보통신산업의 핵심으로 급부상하고 있다. 이에따라 한국통신은 고객중심의 미래경영체제로서의 전환을 통하여 WTO 체제하의 국제경쟁 환경을 극복하고 고객의 다양한 요구를 신속하고 편리하게 일괄처리해 줄 수 있는 국내 최대의 SI프로젝트인 통합고객정보시스템(ICIS: Integrated Customer Information System)개발에 착수 하였다.