• 한국경영과학회:학술대회논문집
• /
• 한국경영과학회 2000년도 추계학술대회 및 정기총회
• /
• pp.238-238
• /
• 2000

• 한국분말재료학회지
• /
• 제23권2호
• /
• pp.149-169
• /
• 2016

Additive manufacturing (AM) is defined as the manufacture of three-dimensional tangible products by additively consolidating two-dimensional patterns layer by layer. In this review, we introduce four fundamental conceptual pillars that support AM technology: the bottom-up manufacturing factor, computer-aided manufacturing factor, distributed manufacturing factor, and eliminated manufacturing factor. All the conceptual factors work together; however, business strategy and technology optimization will vary according to the main factor that we emphasize. In parallel to the manufacturing paradigm shift toward mass personalization, manufacturing industrial ecology evolves to achieve competitiveness in economics of scope. AM technology is indeed a potent candidate manufacturing technology for satisfying volatile and customized markets. From the viewpoint of the innovation technology adoption cycle, various pros and cons of AM technology themselves prove that it is an innovative technology, in particular a disruptive innovation in manufacturing technology, as powder technology was when ingot metallurgy was dominant. Chasms related to the AM technology adoption cycle and efforts to cross the chasms are considered.

• 산업공학
• /
• 제20권3호
• /
• pp.277-287
• /
• 2007

Semiconductor manufacturing is one of the most complex and capital-intensive processes composed of several hundreds of operations. In today’s competitive business environments, it is more important than ever before to manage manufacturing process effectively to achieve better performances in terms of customer satisfaction and productivity than those of competitors. So, many semiconductor manufacturing companies implement advanced planning and scheduling (APS) system as a management tool for the complex semiconductor manufacturing process. In this study, we explain roles of production planning and scheduling in semiconductor manufacturing and principal factors that make the production planning and scheduling more difficult. We describe the APS system implementation project at Korean semiconductor manufacturing company in terms of key issues with realistic samples.

• 한국진공학회지
• /
• 제18권5호
• /
• pp.352-357
• /
• 2009

본 연구에서는 1.1 eV의 에너지대역을 흡수할 수 있는 InAs 양자점구조와 1.3 eV의 에너지 대역을 흡수 할 수 있는 InGaAs 양자우물구조를 이용한 텐덤형 태양전지의 구조를 1D poisson을 이용해 설계하고, 분자선 에피택시 장비를 이용하여 각각 5, 10, 15층씩 쌓은 양자점 및 양자우물구조를 삽입하여 p-n접합을 성장하였다. Photoluminescence (PL) 측정을 이용한 광학적특성 평가에서 양자점 5층 및 양자우물 10층을 삽입한 구조의 PL 피크가 가장 높은 상대발광강도를 나타냈으며, 각각 1.1 eV 및 1.3 eV에서 57.6 meV 및 12.37 meV의 Full Width at Half Maximum을 나타내었다. 양자점의 밀도 및 크기는 Reflection High-Energy Electron Diffraction system과 Atomic Force Microscope를 이용해 분석하였다. 그리고 GaAs/AlGaAs층을 이용한 터널접합에서는 I-V 측정을 통하여 GaAs층의 두께(20, 30, 50 nm)에 따른 터널링 효과를 평가하였다. GaAs 층의 두께가 30 nm 및 50 nm의 터널접합에서는 backward diode 특성을 나타낸 반면, 20 nm GaAs층의 GaAs/AlGaAs 터널접합에서는 다이오드 특성 곡선을 확인하였다.

• 기술경영경제학회:학술대회논문집
• /
• 기술경영경제학회 2002년도 제20회 동계학술발표회 논문집
• /
• pp.133-149
• /
• 2002

This study aims to investigate the impact of wide use of digital technology, in particular, the Internet, on innovation process and corporate strategy in electronics industry. The introduction of digital technology has changed innovation process, business model and organizational structure of the electronics companies. With the introduction of digital technology, the entire value chain of electronics industry from procurement, sales, and marketing to R&D and manufacturing has been restructured. E-commerce has been a major agenda for e-business. Recently, collaboration among electronics companies through e-marketplace has emerged as an important issue. A web-based e-commerce standard, so called RosettaNet, has been developed for facilitating e-transactions of electronics firms. The development of digital technology has dramatically increased the processing speed and sophisticated the virtual reality technology. As simulation becomes easier and more effective, the uncertainty and risk involved in R&D has decreased significantly. Another positive impact is closer cooperation between R&D and manufacturing functions. Taking advantage of automated and flexible production technology, has a new type of firm, so called, EMS (Electronics Manufacturing Services) emerged, whose strategic focus is on manufacturing only. The EMS can be seen as a kind of innovative organization, that is, a modular organization for production function. Digital technology has made convergence of computer and communication possible at early years but right now the convergence has been accelerated in extensive areas of communication, broadcasting, information appliances, software, contents, and services. Firms' effort for an innovative product and service has been intensified and the competition for a new standard product and service has become severe in electronics industry. Business activities are always realized in a specific organizational context. Accordingly building up innovation-friendly organization has emerged as a critical concern. Due to the striking decrease of transaction cost, a network type of organization has proliferated, and a business function turns into a modular organization. As a whole, digital technology has pushed electronics firms into developing their own business model, which takes consideration of standardization of business platform and their core competency.

• 한국경영과학회:학술대회논문집
• /
• 한국경영과학회 2003년도 추계학술대회 및 정기총회
• /
• pp.259-262
• /
• 2003

Group technology(GT) is a manufacturing philosophy which identifies and exploits the similarity of parts and processes in design and manufacturing. A specific application of GT is cellular manufacturing. the first step in the preliminary stage of cellular manufacturing system design is cell formation, generally known as a machine-part cell formation(MPCF). This paper presents and tests a grouping gentic algorithm(GGA) for solving the MPCF problem and uses the measurements of e(ficacy. GGA's replacement heuristic used similarity coefficients is presented.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2011년도 춘계학술대회 논문집
• /
• pp.489-490
• /
• 2011

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2011년도 춘계학술대회 논문집
• /
• pp.485-486
• /
• 2011

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2011년도 춘계학술대회 논문집
• /
• pp.1059-1060
• /
• 2011

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2011년도 춘계학술대회 논문집
• /
• pp.1063-1064
• /
• 2011