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1 – 10 of 278J.M. Morrison, T.G. Tessier and B. Gu
Recently, a Transverse Excited Atmospheric (TEA) CO2 laser technology has been developed for the micro‐machining of vias in non‐reinforced glass laminates. This system has been…
Abstract
Recently, a Transverse Excited Atmospheric (TEA) CO2 laser technology has been developed for the micro‐machining of vias in non‐reinforced glass laminates. This system has been designed to accommodate the large panel sizes associated with PWB processing. The salient features of this modified CO2 laser technology are summarised. A joint Lumonics/Motorola study was carried out to assess the applicability of this laser processing technology for use in higher density PWB and MCM‐L substrate processing and its compatibility with currently available classes of dielectrics used in high density interconnect applications. A 10x improvement in cycle time/throughput over the existing raster scanning laser ablation process has been demonstrated.
C. Filloy, G. Tessier, S. Holé, G. Jerosolimski and D. Fournier
Thermal phenomena that occur in operating integrated circuits can disturb their functioning and even cause failures. In order to prevent such dramatic issues, it is necessary to…
Abstract
Thermal phenomena that occur in operating integrated circuits can disturb their functioning and even cause failures. In order to prevent such dramatic issues, it is necessary to study these phenomena by developing high‐resolution thermal mapping of electronic devices. This can be done by using the thermoreflectance technique. The principle of thermoreflectance measurements is reviewed and various experimental setups are described. Experimental results show that this technique allows the mapping of both low and high frequency thermal phenomena at submicron scales.
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G. Tessier, M. Bardoux, C. Filloy, C. Boué and D. Fournier
Heating is a major cause of failure in integrated circuits. The authors have designed thermoreflectance‐based systems operating at various wavelengths in order to obtain…
Abstract
Purpose
Heating is a major cause of failure in integrated circuits. The authors have designed thermoreflectance‐based systems operating at various wavelengths in order to obtain temperature images. This paper aims to explore the possibilities of each wavelength range and detail the charge coupled device (CCD)‐based thermal imaging tools dedicated to the high‐resolution inspection of integrated circuits.
Design/methodology/approach
Thermoreflectance is a non‐contact optical method using the local reflectivity variations induced by heating to infer temperature mappings, and can be conducted at virtually any wavelength, giving access to different types of information. In the visible, the technique is now well established. It can probe temperatures through several micrometers of transparent encapsulation layers, with sub‐μm spatial resolution and 100 mK thermal resolution.
Findings
In the ultraviolet range, dielectric encapsulation layers are opaque and thermoreflectance gives access to the surface temperature. In the near infrared, thermoreflectance is an interesting solution to examine chips turned upside down, since these wavelengths can penetrate through silicon substrates and give access to the temperature of the active layers themselves.
Research limitations/implications
The authors show that the illumination wavelength of thermoreflectance should be chosen with care depending on the region of the integrated circuit (surface, above, or below the substrate) to be investigated.
Practical implications
This set of versatile and sensitive tools makes thermoreflectance an interesting tool for the semiconductor industry, either during prototyping or as a characterization tool after fabrication.
Originality/value
The CCD‐based thermoreflectance approach adopted here allows fast, non‐contact, high‐resolution thermal imaging of integrated circuits.
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Brad Hagen and Christopher Armstrong‐Esther
Despite the increasing evidence about the inappropriate use of medications by older people, there is very little published evidence about the control and monitoring of neuroleptic…
Abstract
Despite the increasing evidence about the inappropriate use of medications by older people, there is very little published evidence about the control and monitoring of neuroleptic drugs used in nursing homes. As others have indicated, this is all the more worrying when set in the context of the paucity of research on nursing home care and the trend to replace registered nurses with untrained care assistants. In the United States, legislation in the form of the Nursing Home Reform Act (OBRA 1987) was introduced, in part, to regulate the prescribing and administration of neuroleptic (antipsychotic) drugs. No such legislation exists in Canada or the United Kingdom. In the case of the latter jurisdiction, the recent Royal Commission on Long‐Term Care for older people (The Stationery Office, 1999) has recommended a national care commission to monitor care, and set assessment and quality benchmarks. In Canada this debate has not even begun, and the purpose of this paper is not to ignite controversy, but to raise questions about the use of these drugs with nursing home residents. Voluntary guidelines and education of physicians, nurses and care attendants would be infinitely better than legislation. In the meantime, we need research to address the following questions: For what reasons should these drugs be given to older people? Are these drugs being used appropriately? Is the risk of side‐effects too great with these drugs? Are the numbers and type of staff employed in nursing homes adequate/qualified to detect and report side‐effects? How well do these drugs manage the behaviours they are given to control? Are they being used as chemical restraints or to make the older person compliant? Are the so‐called ‘atypical’ neuroleptic drugs any better? What we offer in this article is background information that might encourage others to not only review their practice but also to address these questions.
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Wenjun Liu and Bozhi Yang
The goal of this review paper is to provide information on several commonly used thermography techniques in semiconductor and micro‐device industry and research today.
Abstract
Purpose
The goal of this review paper is to provide information on several commonly used thermography techniques in semiconductor and micro‐device industry and research today.
Design/methodology/approach
The temperature imaging or mapping techniques include thin coating methods such as liquid crystal thermography and fluorescence microthermography, contact mechanical methods such as scanning thermal microscopy, and optical techniques such as infrared microscopy and thermoreflectance. Their principles, characteristics and applications are discussed.
Findings
Thermal issues play an important part in optimizing the performance and reliability of high‐frequency and high‐packing density electronic circuits. To improve the performance and reliability of microelectronic devices and also to validate thermal models, accurate knowledge of local temperatures and thermal properties is required.
Originality/value
The paper provides readers, especially technical engineers in industry, a general knowledge of several commonly used thermography techniques in the semiconductor and micro‐device industries.
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Torill Larsen, Aurelie Van Hoye, Hege Eikeland Tjomsland, Ingrid Holsen, Bente Wold, Jean-Philippe Heuzé, Oddrun Samdal and Philippe Sarrazin
The health promoting benefits of sport participation are under-utilized and should be further developed, particularly at the grassroots level. The purpose of this paper is to…
Abstract
Purpose
The health promoting benefits of sport participation are under-utilized and should be further developed, particularly at the grassroots level. The purpose of this paper is to examine how grassroots coaches in youth football perceive their coaching practices after participating in a community-based coach education program aimed at optimizing their experiences in youth sport, namely the Empowering Coaching™ training program, based on self-determination theory (SDT) and achievement goal theory (AGT). It compares French and Norwegian coaches to suggest whether the principles of the Empowering Coaching™ training program can be applied successfully in the two countries.
Design/methodology/approach
The Empowering Coaching™ training program is a six hour workshop and was delivered at the beginning of the 2011 football season. At the end of the season, the grassroots coaches’ reflections on their coaching practices were examined through a qualitative approach with in-depth interviews of 18 coaches in France and Norway, applying a hybrid analyses and comparing country-wise.
Findings
All coaches expressed the intention to embrace the philosophy of the program, and to apply several of the strategies they had learnt during the workshop. The coaches perceived that the program supported their efforts to develop and implement strategies to stimulate intrinsic motivation, enjoyment and long-term participation among the players. There were some differences between coaches from France and Norway (e.g. rules and involvement), but the similarities were more evident, supporting the universality of applying SDT in the youth sport setting.
Social implications
The findings are encouraging for sport as a health promoting setting and for the development of the personal skills in grassroot coaches, as they imply that coaches who feel competent in how to structure practices and matches that provide the players with positive sport experiences are likely to enable players to feel supported and motivated.
Originality/value
This study explores qualitatively the impact of an intervention based on SDT and AGT, focussing on football coaches’ reflections on their coaching practices.
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Marisa Smith and Umit Sezer Bititci
The purpose of this paper is to recognise the importance of the interplay between performance measurement, performance management, employee engagement and performance. However…
Abstract
Purpose
The purpose of this paper is to recognise the importance of the interplay between performance measurement, performance management, employee engagement and performance. However, the nature of this phenomenon is not well understood. Analysis of the literature reveals two dimensions of organisational control, technical and social, that are used to develop a conceptual framework for studying this phenomenon.
Design/methodology/approach
The authors conducted explorative action research involving pilot and control groups from two departments of a UK bank.
Findings
The authors show that an intervention on the social controls has led to changes in technical controls of the performance measurement system resulting in significant improvement in employee engagement and performance.
Research limitations/implications
The research was undertaken with two cases from a single organisation. Further fine-grained, longitudinal research is required to fully understand this phenomenon in a wider range of contexts.
Practical implications
The paper contributes to the theory on performance measures and gives guidance on how organisations might design their performance measurement systems to enhance employee engagement and performance.
Originality/value
The study makes three contributions. First, the authors introduce a new theoretical framework based the organisational control theory providing a basis for future research. Second, through nine propositions, the authors establish a causal relationship between performance measurement, performance management, employee engagement and performance. Third, the authors identify a gap in knowledge concerning the design of organisational controls in the context of the process that is being managed.
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Vanessa Kurdi, Mireille Joussemet and Geneviève A. Mageau
This chapter explores how self-determination theory (SDT; Ryan & Deci, 2000, 2017), an empirical theory about human motivation and personality, aligns with principles and…
Abstract
This chapter explores how self-determination theory (SDT; Ryan & Deci, 2000, 2017), an empirical theory about human motivation and personality, aligns with principles and practices of social and emotional learning (SEL) within the school context. Through its emphasis on basic psychological needs (BPN) for autonomy, competence, and relatedness, SDT proposes a broad perspective on how the social context can facilitate the development of social and emotional skills, which complements SEL programs. Research anchored in SDT has indeed established that students' academic, social, and emotional skills are determined at least partly by the extent to which their BPN are fulfilled in their learning environment. SDT also brings attention to the motivation and goals underlying the teaching and learning of social and emotional skills. Although SDT-based interventions mainly target the school or the classroom climate rather than students' skills, they can also foster the development of the five core social and emotional competencies defined by CASEL (2005). Implications and future directions for practices and research integrating SDT-based principles and interventions within SEL programs and practices are discussed.
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Before the appearance of our next issue, the Annual Meeting of the Library Association will have taken place. In many ways, as indicated last month, it will be an interesting…
Abstract
Before the appearance of our next issue, the Annual Meeting of the Library Association will have taken place. In many ways, as indicated last month, it will be an interesting meeting, largely because it is in the nature of an experiment. International conditions, the state of national and municipal finance, the absence of library workers with the colours, and the omission of social events, all tend to influence its character. It is possible, however, that these very circumstances may increase the interest in the actual conference business, especially as the programme bears largely upon the War. The programme itself is formidable, and it will be interesting to see how the section on the literature of the war, for example, will be treated. Probably the Publications' Committee have in mind the book symposia which are a feature of the meetings of various library associations in the United States. These consist of a few minutes' characterisation, by an opener, of a certain book or type of literature, and a discussion after it. The experiment was attempted in London last year at one of the monthly meetings, but owing to a misapprehension the speaker gave an excellent lecture on Francis Thompson of more than an hour's duration, when he had been expected to give a brief description of Francis Meynell's biography of that poet. If any gatherings for a similar purpose are arranged, we hope the speakers will be primed sufficiently to avoid that error. As for social events, their omission is less likely to be felt in London than anywhere else in the Kingdom. London is a perennial source of social amusement in itself, and the evenings can readily be filled there—“chacun à son goût”—really better than by attending pre‐arranged gatherings.
D.K. Sharma, B.K. Kaushik and R.K. Sharma
The purpose of this paper is to explore the functioning of very‐large‐scale integration (VLSI) interconnects and modeling of interconnects and evaluate different approaches of…
Abstract
Purpose
The purpose of this paper is to explore the functioning of very‐large‐scale integration (VLSI) interconnects and modeling of interconnects and evaluate different approaches of testing interconnects.
Design/methodology/approach
In the past, on‐chip interconnect wires were not considered in circuit analysis except in high precision analysis. Wiring‐up of on‐chip devices takes place through various conductors produced during fabrication process. The shrinking size of metal‐oxide semiconductor field effect transistor devices is largely responsible for growth of VLSI circuits. With deep sub‐micron (DSM) technology, the interconnect geometry is scaled down for high wiring density. The complex geometry of interconnects and high operational frequency introduce wire parasitics and inter‐wire parasitics. These parasitics causes delay, power dissipation, and crosstalk that may affect the signal integrity in VLSI system. Accurate analysis, sophisticated design, and effective test methods are the requirement to ensure the proper functionality and reliability of VLSI circuits. The testing of interconnect is becoming important and a challenge in the current technology.
Findings
The effects of interconnect on signal integrity, power dissipation, and delay emerges significantly in DSM technology. For proper performance of the circuit, testing of interconnect is important and emerging challenge in the nanotechnology era. Although some work has been done for testing of interconnect, however, it is still an open area to test the parasitics effects of VLSI/ultra‐large‐scale integration interconnects. Efforts are required to analyze and to develop test methods for crosstalk, delay and power dissipation in current technology with solutions to minimize this effect.
Originality/value
This paper reviews the functioning of VLSI interconnects from micrometer to nanometer technology. The development of various interconnect models from simple short circuit to latest resistance inductance capacitance transmission line model are discussed. Furthermore, various methodologies such as built‐in self test and other techniques for testing interconnect for crosstalk and delay are discussed.
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