The Experts below are selected from a list of 5601 Experts worldwide ranked by ideXlab platform
N. D. Robinson - One of the best experts on this subject based on the ideXlab platform.
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Organic materials for Printed Electronics
Nature Materials, 2007Co-Authors: Matz Berggren, Magnus Berggren, David Nilsson, N. D. RobinsonAbstract:Organic materials can offer a low-cost alternative for Printed Electronics and flexible displays. However, research in these systems must exploit the differences - via molecular-level control of functionality - compared with inorganic Electronics if they are to become commercially viable.
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organic materials for Printed Electronics
Nature Materials, 2007Co-Authors: Magnus Berggren, David Nilsson, N. D. RobinsonAbstract:Organic materials can offer a low-cost alternative for Printed Electronics and flexible displays. However, research in these systems must exploit the differences — via molecular-level control of fu ...
Dongjin Lee - One of the best experts on this subject based on the ideXlab platform.
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Tracing evolving trends in Printed Electronics using patent information
Journal of Nanoparticle Research, 2014Co-Authors: Janghyeok Yoon, Mujin Kim, Jongsu Lee, Youngjin Park, Dongjin LeeAbstract:Printed Electronics, as an extension to conventional Electronics, has grown considerably for decades. At this moment, therefore, tracing the development of this technology up to the present will provide researchers and R&D planners with better understanding of the technology’s evolving characteristics and insights for further R&D directions. This paper carries out two bibliographic analyses to study the technology development life cycle and the technological knowledge within the area of Printed Electronics. First, we fit a growth curve to yearly patent registration data, thereby calculating several indicators, including the current technological maturity ratio, the number of potential future patents and the expected remaining life. Second, we identify the core and brokering technology classes within the overall technology network of Printed Electronics by combining patent co-classification analysis and social network analysis. As a result, we could obtain some findings from the inventional point of view; the technological development of Printed Electronics has entered the maturity stage, and the expected remaining life was 8.5 years as of the beginning of 2013. In addition, we identified several technology areas that have the high importance to act as both core and brokering technologies, apparatus for metal working, anti-inductive structures, and electronic circuit control systems.
Il Je Yu - One of the best experts on this subject based on the ideXlab platform.
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Case study on risk evaluation of Printed Electronics using nanosilver ink
Nano Convergence, 2016Co-Authors: Jung Duck Park, Il Je YuAbstract:Background With the ever-increasing development of nanotechnology, our society is being surrounded by possible risks related to exposure to manufactured nanomaterials. The consumer market already includes many products that contain silver nanoparticles (AgNPs), including various household products, such as yoga mats, cutting boards, running shirts, and socks. There is a growing concern over the release of AgNPs in workplaces related to the manufacture and application of nanomaterials. Objective This study investigated the release of AgNPs during the operation of a Printed Electronics printer. Methods Using an exposure simulation chamber, a nanoparticle collector, scanning mobility particle sizer (SMPS), condensation particle counter (CPC), dust monitor, and mixed cellulose ester (MCE) filters are all connected to measure the AgNP exposure levels when operating a Printed Electronics printer. Results A very small amount of AgNPs was released during the operation of the Printed Electronics printer, and the number of AgNPs inside the exposure simulation chamber was lower than that outside background. In addition, when evaluating the potential risks for consumers and workers using a margin of exposure (MOE) approach and target MOE of 1000, the operational results far exceeded the target MOE in this simulation study and in a previous workplace exposure study. Conclusion The overall results indicate a no-risk concern level in the case of Printed Electronics using nanosilver ink.
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Exposure assessment of workers in Printed Electronics workplace.
Inhalation Toxicology, 2013Co-Authors: Eun Kyung Sohn, Il Je YuAbstract:AbstractPrinted Electronics uses converging technologies, such as printing, fine mechanics, nanotechnology, Electronics and other new technologies. Consequently, Printed Electronics raises additional health and safety concerns to those experienced in the traditional printing industry. This study investigated two Printed Electronics workplaces based on a walk-through survey and personal and area sampling. All the Printed Electronics operations were conducted in a cleanroom. No indication of exposure to excess silver nanoparticles or carbon nanotubes (CNTs) was found. While the organic solvents were lower than current occupational exposure limits, there was a lack of engineering controls, such as local exhaust ventilation, correct enclosure and duct connections. There was also an insufficient quantity of personal protective equipment, and some organic solvents not described in the safety data sheets (SDSs) were detected in the air samples. Plus, the cleaning work, a major emissions operation, was not conduc...
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Exposure assessment of workers in Printed Electronics workplace
Inhalation Toxicology, 2013Co-Authors: Ji Hyun Lee, Jin Soo Ahn, Kangho Ahn, Taik Min Lee, Keun-soo Kim, Jong-hwan Lee, Eun Kyung Sohn, Il Je YuAbstract:Printed Electronics uses converging technologies, such as printing, fine mechanics, nanotechnology, Electronics and other new technologies. Consequently, Printed Electronics raises additional health and safety concerns to those experienced in the traditional printing industry. This study investigated two Printed Electronics workplaces based on a walk-through survey and personal and area sampling. All the Printed Electronics operations were conducted in a cleanroom. No indication of exposure to excess silver nanoparticles or carbon nanotubes (CNTs) was found. While the organic solvents were lower than current occupational exposure limits, there was a lack of engineering controls, such as local exhaust ventilation, correct enclosure and duct connections. There was also an insufficient quantity of personal protective equipment, and some organic solvents not described in the safety data sheets (SDSs) were detected in the air samples. Plus, the cleaning work, a major emissions operation, was not conducted within a hood, and the cleaning waste was not properly disposed of. Therefore, the present exposure assessment results from two Printed Electronics workplaces suggest that the Printed Electronics industry needs to take note of the occupational safety and health risks and hazards already established by the traditional printing industry, along with new risks and hazards originating from converging technologies such as nanotechnology. © 2013 Informa Healthcare USA, Inc.
Kee Hyun Shin - One of the best experts on this subject based on the ideXlab platform.
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URAI - Improvement of surface roughness and conductivity by calendering process for Printed Electronics
2011 8th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI), 2011Co-Authors: Ho Anh Duc Nguyen, Nguyen Hoang, Kee Hyun ShinAbstract:A mass production technique of roll-to-roll (R2R) gravure printing system with high resolution and pattern fidelity has been tested for manufacturing electronic products. Performance of Printed Electronics depends greatly upon the surface geometry of Printed pattern such as thickness and roughness. We applied a calendering process to control the surface geometry and the resistivity of Printed pattern. We also investigated the effect of process parameters including temperature, pressure, and speed. Experimental results demonstrate that the calendering process should be useful for R2R Printed Electronics.
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Improvement of surface roughness and conductivity by calendering process for Printed Electronics
2011 8th International Conference on Ubiquitous Robots and Ambient Intelligence (URAI), 2011Co-Authors: Ho Anh Duc Nguyen, Nguyen Hoang, Kee Hyun ShinAbstract:A mass production technique of roll-to-roll (R2R) gravure printing system with high resolution and pattern fidelity has been tested for manufacturing electronic products. Performance of Printed Electronics depends greatly upon the surface geometry of Printed pattern such as thickness and roughness. We applied a calendering process to control the surface geometry and the resistivity of Printed pattern. We also investigated the effect of process parameters including temperature, pressure, and speed. Experimental results demonstrate that the calendering process should be useful for R2R Printed Electronics.
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Quality control with matching technology in roll to roll Printed Electronics
Journal of Mechanical Science and Technology, 2010Co-Authors: Hyun Kyoo Kang, Ho Anh Duc Nguyen, Kee Hyun ShinAbstract:R2R (Roll to roll) Printed Electronics has been an attractive technology for the mass production. Therefore, many research works have been focused on an optimal flexible substrate, ink formulation, printing process, curing method for a conductive ink in Printed Electronics applications. However, they did not relate their analysis with the system parameters of R2R continuous printing systems. In this paper, it is found that a Printed pattern geometric quality which affects functional quality of Printed electronic device could be changed with respect to operating tension of bare substrate even if local optimized ink, substrate, and printing process were applied. Additionally, ink transfer mechanism for R2R Printed Electronics is analyzed regarding a dynamic surface energy of a bare substrate under a tension in R2R printing systems. With the aim of an efficient prediction of the thickness of R2R Printed patterns for given operating conditions, a simple meta-model is developed by using the design of experiment (DOE) method. Also, the proposed meta-model has been verified by several experiments. Through the results, it is presented that how to find an optimal operating tension in R2R Printed Electronics for guaranteeing a required thickness of R2R Printed patterns.
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Quality control with matching technology in roll to roll Printed Electronics
Journal of Mechanical Science and Technology, 2010Co-Authors: Chang Woo Lee, Ho Anh Duc Nguyen, Hyun Kyoo Kang, Ho Joon Kim, Kee Hyun ShinAbstract:R2R (Roll to roll) Printed Electronics has been an attractive technology for the mass production. Therefore, many research works have been focused on an optimal flexible substrate, ink formulation, printing process, curing method for a conductive ink in Printed Electronics applications. However, they did not relate their analysis with the system parameters of R2R continuous printing systems. In this paper, it is found that a Printed pattern geometric quality which affects functional quality of Printed electronic device could be changed with respect to operating tension of bare substrate even if local optimized ink, substrate, and printing process were applied. Additionally, ink transfer mechanism for R2R Printed Electronics is analyzed regarding a dynamic surface energy of a bare substrate under a tension in R2R printing systems. With the aim of an efficient prediction of the thickness of R2R Printed patterns for given operating conditions, a simple meta-model is developed by using the design of experiment (DOE) method. Also, the proposed meta-model has been verified by several experiments. Through the results, it is presented that how to find an optimal operating tension in R2R Printed Electronics for guaranteeing a required thickness of R2R Printed patterns. ? KSME & Springer 2010.
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Compensation of machine directional register in a multi-layer roll-to-roll Printed Electronics
ICCAS 2010, 2010Co-Authors: Hyun Kyoo Kang, Kee Hyun ShinAbstract:For the adaption of roll-to-roll printing method to the Printed Electronics, it is mandatory to increase the resolution of register control. A compensation method was proposed to cancel out the disturbance of the machine directional register from upstream span. The proposed compensator could be used to improve the performance of the machine directional register controller in multi-layer roll-to-roll Printed Electronics. The proposed compensator was experimentally verified through various operating conditions. The results show that the proposed compensator improves the control performance of machine directional register in overcoming the upstream disturbances.
Chang Woo Lee - One of the best experts on this subject based on the ideXlab platform.
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Quality control with matching technology in roll to roll Printed Electronics
Journal of Mechanical Science and Technology, 2010Co-Authors: Chang Woo Lee, Ho Anh Duc Nguyen, Hyun Kyoo Kang, Ho Joon Kim, Kee Hyun ShinAbstract:R2R (Roll to roll) Printed Electronics has been an attractive technology for the mass production. Therefore, many research works have been focused on an optimal flexible substrate, ink formulation, printing process, curing method for a conductive ink in Printed Electronics applications. However, they did not relate their analysis with the system parameters of R2R continuous printing systems. In this paper, it is found that a Printed pattern geometric quality which affects functional quality of Printed electronic device could be changed with respect to operating tension of bare substrate even if local optimized ink, substrate, and printing process were applied. Additionally, ink transfer mechanism for R2R Printed Electronics is analyzed regarding a dynamic surface energy of a bare substrate under a tension in R2R printing systems. With the aim of an efficient prediction of the thickness of R2R Printed patterns for given operating conditions, a simple meta-model is developed by using the design of experiment (DOE) method. Also, the proposed meta-model has been verified by several experiments. Through the results, it is presented that how to find an optimal operating tension in R2R Printed Electronics for guaranteeing a required thickness of R2R Printed patterns. ? KSME & Springer 2010.
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Matching technology for R2R Printed Electronics
Proceedings of International Meeting on Information Display, 2010Co-Authors: Chang Woo Lee, Hyoungku Kang, Chul Lee, K. ShinAbstract:Roll-to-roll printing is an attractive technology for mass-producing Printed Electronics. Application of R2R printing process, however, requires information related to system parameters. We show that the quality of a Printed pattern in term of geometric and functional aspects could be affected by tension in spite of optimal settings like an optimized ink and printing method. In addition, an ink transfer mechanism is analyzed to reveal the relationship between dynamic surface roughness and tension of a moving web. It is found that two important factors for achieving desired thickness and roughness are optimal tension and control accuracy of the operating tension.
