The Experts below are selected from a list of 825 Experts worldwide ranked by ideXlab platform
Michael Pecht - One of the best experts on this subject based on the ideXlab platform.
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Qualification and Quality Assurance
Encapsulation Technologies for Electronic Applications, 2020Co-Authors: Haleh Ardebili, Michael PechtAbstract:Qualification is an application-specific process involving the evaluation of the Product with respect to its quality and reliability. The aim of the Qualification process is to verify whether the Product meets or exceeds reliability and quality requirements of the intended application. Qualification process consists of three stages: virtual Qualification, Product Qualification, and mass Production Qualification. Virtual Qualification is based on Physics-of-failure (PoF) model predictions on the life of the design without any physical testing. Virtual Qualification is relatively less expensive and less time consuming than Product Qualification. Product Qualification involves physical tests on the manufacturer prototype including HALT to determine the strength limits of the Product and accelerated testing for reliability assessment. Accelerated testing is used in Qualification process because it provides the advantage of time compression. The third stage of Qualification is quality assurance testing or screening. The overall quality assurance process consists of statistical process control, in-process monitoring, and screening. The purpose of screening is to precipitate defects. Screening can be classified as stress and non-stress screening. Stress screening may need to be conducted only if the technology is new and many defects are expected. Also, if screening must be done, screening during the process flow is preferred to the end-of-the-line or final Product screening. The information from the root-cause analysis on the defects and failures observed during screening can be used to improve the package design, materials, and processes, and thus reduce or eliminate future defects.
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Challenges in the Qualification of Electronic Components and Systems
IEEE Transactions on Device and Materials Reliability, 2013Co-Authors: Vidyu Challa, Peter Rundle, Michael PechtAbstract:Qualification, which is the process of demonstrating that a Product is capable of meeting specified requirements, is a costly and lengthy part of the Product development process. This paper discusses the challenges that companies face when qualifying their Products in an environment of abbreviated Product development cycles, changing environmental regulations, which require the use of new materials or processes, and a complex and diffuse supply chain. A more comprehensive approach to Product Qualification involving the use of physics-of-failure principles, prognostics and health management techniques, and Qualification at every stage of Product development that builds on earlier work and industry standards is presented here.
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Prognostics and health monitoring for improved Qualification
EuroSimE 2009 - 10th International Conference on Thermal Mechanical and Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, 2009Co-Authors: Michael PechtAbstract:The aim of Qualification is to verify whether a Product meets or exceeds the reliability and quality requirements of its intended application. Qualification plays an important role in the process of Product development. It can be classified by its specific purpose at different stages of the Product development process. In this paper, a new methodology of Product Qualification is proposed based on physics-of-failure. This methodology consists of: Product configuration and material information collection; application requirement information collection; strength limits and margins; failure modes, mechanisms and effects analysis; definition of Qualification requirements; Qualification test planning; testing; failure analysis and verification; and quality and reliability assessment. This approach to Qualification ensures that it successfully addresses the failure mechanisms applicable to the Product's specific design, manufacture, and application conditions.
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Prognostics-based Product Qualification
2009 IEEE Aerospace conference, 2009Co-Authors: Michael Pecht, Jie GuAbstract:Qualification is the process of demonstrating that a Product is capable of meeting or exceeding specified requirements. The specified requirements are expected to depend on the final Product and its specific life cycle application conditions. In this paper, a prognostics-based Qualification is proposed, which is more efficient and cost effective than the traditional Qualification process. The approach does not require a Product to fail in the test, because in addition to detecting failure, the health of the Product is monitored, including degraded health and intermittent Product disruptions. The results are a significant decrease in Qualification time and much improved understanding of the Product's reliability, this paper, a prognostics-based Qualification is proposed, which is more efficient and cost effective than the traditional Qualification process. The approach does not require a Product to fail in the test, because in addition to detecting failure, the health of the Product is monitored, including degraded health and intermittent Product disruptions. The results are a significant decrease in Qualification time and much improved understanding of the Product's reliability.
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prognostics based Product Qualification
IEEE Aerospace Conference, 2009Co-Authors: Michael Pecht, Jie GuAbstract:Qualification is the process of demonstrating that a Product is capable of meeting or exceeding specified requirements. The specified requirements are expected to depend on the final Product and its specific life cycle application conditions. In this paper, a prognostics-based Qualification is proposed, which is more efficient and cost effective than the traditional Qualification process. The approach does not require a Product to fail in the test, because in addition to detecting failure, the health of the Product is monitored, including degraded health and intermittent Product disruptions. The results are a significant decrease in Qualification time and much improved understanding of the Product's reliability.
W.f. Wong - One of the best experts on this subject based on the ideXlab platform.
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Product Qualification degradation of steel toe esd footwear
Electrical Overstress Electrostatic Discharge Symposium, 2016Co-Authors: Muhammad Hamizan Bin Abdul Samad, W.f. WongAbstract:It was found that two vendors' steel toe ESD footwear technical specifications were inaccurate. Two of the three steel toe ESD footwear provided by vendors failed the resistance measurement as per ANSI/ESD STM9.1 and STM97.1. Additional assessment was conducted to determine the durability of the steel toe ESD footwear.
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Product Qualification & degradation of steel toe ESD footwear
2016 38th Electrical Overstress Electrostatic Discharge Symposium (EOS ESD), 2016Co-Authors: Muhammad Hamizan Bin Abdul Samad, W.f. WongAbstract:It was found that two vendors' steel toe ESD footwear technical specifications were inaccurate. Two of the three steel toe ESD footwear provided by vendors failed the resistance measurement as per ANSI/ESD STM9.1 and STM97.1. Additional assessment was conducted to determine the durability of the steel toe ESD footwear.
Andrea Marescotti - One of the best experts on this subject based on the ideXlab platform.
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regional foods and rural development the role of Product Qualification
Journal of Rural Studies, 2007Co-Authors: Angela Tregear, Filippo Arfini, Giovanni Belletti, Andrea MarescottiAbstract:Abstract Qualification schemes have become popular tools for supporting regional foods, yet little is understood about the impacts they have on the rural development contribution of such foods. Qualification processes may stimulate new networks and community actions, but they may also be incompatible with strategies of extended territorial development because of their foundation in theories of competitive advantage. To explore these issues, the evolution is traced of three cases of regional food Production, where local actors pursue the opportunity to qualify Products under EEC Regulation 2081/92. The results reveal, in practice, the different experiences that can evolve under the same Qualification mechanism, and also how the consequences for rural development can vary. The paper concludes with analysis of factors influencing the involvement and behaviour of actors in regional food Qualification, and what these infer for the rural development approach pursued.
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the impact of territorial Product Qualification processes on the rural development potential of small scale food Productions
2004Co-Authors: Angela Tregear, Filippo Arfini, Giovanni Belletti, Andrea MarescottiAbstract:processes have existed for agrifood Products for a very long time, in particular typical Products, where Qualification is based on the link to territory. Benefits of these processes have long been realised for the particular qualified producers involved, in terms of competition and marketing advantages. More recently however, Product Qualification has been put forward as a mechanism for achieving wider rural development benefits, via valorisation of shared, traditional materials and skills, and by stimulation of dynamic actor networks. However, the processes imply novel interactions between public and private bodies, operating in new types of arena. They may bring to the fore certain types of stakeholder with particular motivations that influence the way in which Production and distribution activities are structured and executed. All of these are likely to impact on local rural areas in particular ways, not all beneficial. So in practice, how do those involved in small-scale food Productions respond to Qualification processes? What motivations and strategies do they exhibit? And what implications do these have for rural development? To address these questions, this paper presents contrasting case studies of small-scale food Production from the UK and Italy, examining the key actors' motivations and strategies, as each responds to the opportunity to qualify their Products under the system of European Union regulation 2081/92. As well as analysing how different response strategies are shaped and pursued, the cases also reveal how Product Qualification encourages processes of social construction around phenomena such as history, culture and identity. The consequences of these forces and processes for rural development are assessed.
Werner Kanert - One of the best experts on this subject based on the ideXlab platform.
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Reliability of semiconductor devices - The need for simulation
2011 12th Intl. Conf. on Thermal Mechanical & Multi-Physics Simulation and Experiments in Microelectronics and Microsystems, 2011Co-Authors: Werner KanertAbstract:Reliability requirements for semiconductor devices have increased tremendously in the past years. However, Product Qualification is still dominated by standard stress test procedures. Despite improved approaches that have entered the discussion recently, testing alone will not suffice to prove very low failure rates. Understanding of the device behaviour together with physical modelling is indispensable. Simulation plays a key role in this undertaking.
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Reliability challenges for power devices under active cycling
2009 IEEE International Reliability Physics Symposium, 2009Co-Authors: Werner KanertAbstract:Power stages are subject to severe stress due to active cycling, resulting in e.g. fast thermal cycling. While some applications require several hundred millions of cycles under normal operation conditions, ldquodisturbancesrdquo such as short circuit pose additional challenges. These issues are neither addressed by ldquoclassicalrdquo silicon wafer technology Qualification nor by standard Product Qualification procedures. Challenges and limitations in applying the principles of Robustness Validation to these issues are discussed.
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Investigation of chip-package interaction-looking for more acceleration in Product Qualification tests
2009 IEEE International Reliability Physics Symposium, 2009Co-Authors: Werner Kanert, Reinhard PufallAbstract:Chip-package interaction is a major concern for Product reliability. Temperature cycling is a commonly used stress test to address this issue. The paper shows that temperature shock can substitute temperature cycling for certain failure mechanisms, thereby reducing stress times by a factor of 28 or even more.
Muhammad Hamizan Bin Abdul Samad - One of the best experts on this subject based on the ideXlab platform.
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Product Qualification degradation of steel toe esd footwear
Electrical Overstress Electrostatic Discharge Symposium, 2016Co-Authors: Muhammad Hamizan Bin Abdul Samad, W.f. WongAbstract:It was found that two vendors' steel toe ESD footwear technical specifications were inaccurate. Two of the three steel toe ESD footwear provided by vendors failed the resistance measurement as per ANSI/ESD STM9.1 and STM97.1. Additional assessment was conducted to determine the durability of the steel toe ESD footwear.
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Product Qualification & degradation of steel toe ESD footwear
2016 38th Electrical Overstress Electrostatic Discharge Symposium (EOS ESD), 2016Co-Authors: Muhammad Hamizan Bin Abdul Samad, W.f. WongAbstract:It was found that two vendors' steel toe ESD footwear technical specifications were inaccurate. Two of the three steel toe ESD footwear provided by vendors failed the resistance measurement as per ANSI/ESD STM9.1 and STM97.1. Additional assessment was conducted to determine the durability of the steel toe ESD footwear.