This paper presents results on adding silane coupling agents to the underfill encapsulant to enhance the rheology and wetting of the underfill. These results include rheology…
Abstract
This paper presents results on adding silane coupling agents to the underfill encapsulant to enhance the rheology and wetting of the underfill. These results include rheology measurements, contact angle measurements, and in situ flows using a simulated test chip on an FR4 with solder mask substrate. Three properties of the underfill encapsulant that can affect the mechanical reliability of the die and substrate assembly are: CTE; elastic modulus; and adhesion to the die and substrate surfaces. The approach taken in this paper is to add silane coupling agents with different chemistries to the underfill encapsulant to provide interfacial coupling of the underfill material to different die and substrate materials. This paper presents results on the enhancement of the adhesion of underfill encapsulant to silicon (Si), silicon nitride (SiN) die passivation, benzocyclobutene (BCB) die passivation, and solder mask surfaces. The adhesion strength was measured by die shear testing.
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Juliette M. Iacovino and Sherman A. James
Over the past several decades, scholars and universities have made efforts to increase the retention of students in higher education, but graduation rates remain low. Whereas…
Abstract
Over the past several decades, scholars and universities have made efforts to increase the retention of students in higher education, but graduation rates remain low. Whereas two-thirds of high school graduates attend college, fewer than half graduate. The likelihood of graduation decreases even more for Black, Latino, American Indian, and low-income students, who have a 12–15% lower chance of earning their degree. The importance of psychosocial adjustment to student persistence has received relatively less attention than academic and social integration. Racial/ethnic minority students face unique challenges to psychosocial adjustment in college, including prejudice and discrimination, unwelcoming campus environments, underrepresentation, and a lack of culturally appropriate counseling resources. The current chapter will discuss the impact of these challenges on the persistence, academic success, and health of racial/ethnic minority students, and strategies that universities can employ to create inclusive policies, resources and campus environments that empower students of color and maximize their success.
David A. Hutt, Karen Williams, Paul P. Conway, Fuad M. Khoshnaw, Xiaoyun Cui and Deepa Bhatt
To present the aims and preliminary findings of a research project to investigate the manufacture of multilayer glass substrates built up from thin glass sheets.
Abstract
Purpose
To present the aims and preliminary findings of a research project to investigate the manufacture of multilayer glass substrates built up from thin glass sheets.
Design/methodology/approach
The approaches that may be taken to create glass substrates and the challenges involved are described. Excimer laser machining was used for the formation of microvias and other features in individual glass sheets. In addition, methods for the electroless copper metallisation of the smooth glass surfaces were studied. Finally, a technique for the lamination of the glass layers using low temperature, pressure assisted bonding was investigated.
Findings
Microvias with 100 μm diameter entry holes were successfully machined in 100 μm thick glass sheets and process windows were identified to reduce debris and hole taper. Using appropriate pre‐treatment steps, electroless copper coatings could be deposited uniformly over the smooth glass surface, however, further improvements in adhesion were found to be necessary. The direct lamination of glass layers was found to be possible using pressure and temperature applied over long periods of time. Improvements to the lamination process were made to reduce the initiation of cracks which were assessed using fatigue testing.
Research limitations/implications
The feasibility of the individual steps in the fabrication of glass substrates has been demonstrated. Further work is necessary to control the processes in order to limit microcrack formation, improve copper coating adhesion and ensure uniform lamination of multiple glass layers.
Originality/value
The use of glass materials could enable the manufacture of substrates for high density electrical interconnect with integrated optical waveguides.
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Chien-Yi Huang, Li-Cheng Shen, Ting-Hsuan Wu and Christopher Greene
This paper aims to discuss the key factors affecting the quality characteristics, such as the number of solder balls, the spread distance of residual underfill and the completion…
Abstract
Purpose
This paper aims to discuss the key factors affecting the quality characteristics, such as the number of solder balls, the spread distance of residual underfill and the completion time of the underfilling.
Design/methodology/approach
The Taguchi method is applied to configure the orthogonal table and schedule and execute the experiment. In addition, principal components analysis is used to obtain the points. Then, based on gray relational analysis and the technique for order preference by similarity to ideal solution, the closeness between each quality characteristic and the ideal solution is adopted as the basis for evaluating the quality characteristics.
Findings
The optimal parameter combination is proposed, which includes 4 dispensing (11 mg/dispensing), a “half flow” interval state, 80°C preheating module PCB board and an L-shaped dispensing path and verification testing is performed.
Originality/value
For vehicles and handheld electronic products, solder joints that connect electronic components to printed circuit boards may be cracked due to collision, vibration or falling. Consequently, solder balls are closely surrounded and protected by the underfill to improve joint strength and resist external force factors, such as collision and vibration. This paper addresses the defects caused during the second reflow process of a vehicle electronic communication module after the underfilling process.
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Gerry Armitage, Rob Newell and John Wright
The purpose of this article is to examine a sample of paper‐based incident reports concerning drug incidents to assess the utility of a reporting system.
Abstract
Purpose
The purpose of this article is to examine a sample of paper‐based incident reports concerning drug incidents to assess the utility of a reporting system.
Design/methodology/approach
A 50 per cent random sample of drug‐related incident reports between 1999 and 2003 (n=1,253) was reviewed. Details of the incident including error type and contributory factors were identified, as was status of the reporter. Content analysis of the free text established whether the data provided could promote medication safety and organisational learning.
Findings
The paper finds that all definitive drug errors (n=991) allowed an error type to be identified, but 276 (27.8 per cent) did not include the contributory factor(s) involved. Content analysis of the errors demonstrated an inconsistent level of completeness, and circumstances, causation and action taken were not always logically related. Inter‐rater reliability scores were varied. There was sometimes a significant focus on the actions of one individual in comparison to other factors.
Research limitations/implications
Incident reports can be biased by psychological phenomena, and may not be representative of the parent organisation other than those who report. This study was carried out in a single health care organisation and generalisability may be questioned.
Practical implications
How health professionals interpret drug errors and their reporting could be improved. Reporting can be further developed by reference to taxonomies, but their validity should be considered. Incident report analysis can provide an insight into the competence of individual reporters and the organisation's approach to risk management.
Originality/value
This paper highlights the various data that can be captured from drug error reports but also their shortfalls which include: superficial content, incoherence; and according to professional group – varied reporting rates and an inclination to target individuals.
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We welcome queries from readers on any subject allied to Lubrication, whether it be from manufacturers or users of oils and greases. Technical and practical problems will be…
Abstract
We welcome queries from readers on any subject allied to Lubrication, whether it be from manufacturers or users of oils and greases. Technical and practical problems will be answered by experts. Questioners' names and addresses will not be published if a nomme‐de‐plume is given, but they must be included with questions, for our own information and as a mark of good faith; such information will be treated in strict confidence.
Srikanta Routroy and Sudeep Kumar Pradhan
The purpose of this paper is to identify and evaluate the critical success factors (CSFs) responsible for supplier development (SD) in a manufacturing supply chain environment.
Abstract
Purpose
The purpose of this paper is to identify and evaluate the critical success factors (CSFs) responsible for supplier development (SD) in a manufacturing supply chain environment.
Design/methodology/approach
In total, 13 CSFs for SD are identified (i.e. long‐term strategic goal; top management commitment; incentives; supplier's supplier condition; proximity to manufacturing base; supplier certification; innovation capability; information sharing; environmental readiness; external environment; project completion experience; supplier status and direct involvement) through extensive literature review and discussion held with managers/engineers in different Indian manufacturing companies. A fuzzy analytic hierarchy process (FAHP) is proposed and developed to evaluate the degree of impact of each CSF on SD.
Findings
The degree of impact for each CSF on SD is established for an Indian company. The results are discussed in detail with managerial implications. The long‐term strategic goal is found to be the most significant CSF for successful SD implementation.
Research limitations/implications
This study has not been statistically validated in a manufacturing supply chain environment for complete acceptability.
Practical implications
The simplicity and clarity of the proposed approach enhances its acceptability for evaluating CSFs in manufacturing supply chain environment. It also provides the direction for optimally allocating the efforts and resources for successful implementation of SD in short duration.
Originality/value
Although both CSFs and SD have been widely researched, but no study has been reported in the literature to prioritize and rank the CSFs of SD in an Indian manufacturing environment. The paper contributes to research in the supply chain management area in general and SD in particular for manufacturing environment. The proposed approach has the ability to capture the judgment of multiple experts to prioritize and rank CSFs for SD.
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Fran M. Wolf, James A. Tackett and Gregory A. Claypool
The gap between what the public expects from the auditor and what the auditor perceives his or her role to be has exacerbated crises within the accounting profession. Perceived…
Abstract
The gap between what the public expects from the auditor and what the auditor perceives his or her role to be has exacerbated crises within the accounting profession. Perceived audit failures, followed by historically large law suits, have resulted in the alteration of accounting firms’ behavior. Ironically, the response has done little to alleviate the crisis in public confidence and has led to other concerns related to the auditor‐client relationship. Discusses issues associated with the expectation gap and posits that the profession’s efforts to educate users as to the nature of the audit process is a necessary, but insufficient, response. A two‐part strategy is proposed to effect structural change of the auditor‐client environment. Part one of the strategy calls for greater involvement of regulators in selecting the external auditor and requiring auditor rotation. Part two of the strategy proposes market‐based instruments, audit failure permits and audit disaster futures, to deal with remaining audit risk.
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Muhammad Yaseen Bhutto and Aušra Rūtelionė
This research examines consumer reluctance to purchase organic food using the theory of innovation resistance and also extends the theory by investigating the moderating…
Abstract
Purpose
This research examines consumer reluctance to purchase organic food using the theory of innovation resistance and also extends the theory by investigating the moderating influence of eco-literacy. In addition, the authors used a multigroup analysis to identify differences between consumer segments.
Design/methodology/approach
Data collection used computer-assisted web interviewing and a prior screening process to confirm engagement. Through stratified quota sampling, 1,000 useable responses were obtained from 2,887 recipients.
Findings
The findings reveal barriers are significant inhibitors to adopting organic food. Among these barriers, usage, risk tradition and image barriers have a significant adverse influence on purchase intention. In contrast, the value barrier has a nonsignificant influence on the purchase intention of organic food. However, the study found that eco-literacy significantly reduces the negative influence of risk and tradition barriers on consumers' intentions. In addition, a multigroup analysis examines notable differences between consumer groups based on education, age and income.
Social implications
This research has significant social implications for boosting sustainable consumption in Lithuania. It identifies key barriers to organic food adoption, emphasizing the need for strategic interventions. The study highlights eco-literacy as an essential tool in diminishing resistance to organic food, advocating for targeted educational initiatives. Additionally, it reveals the importance of tailored marketing strategies based on different consumer demographics. Overall, this study provides important insights to promote environmentally conscious consumer behavior and overcome resistance to innovation in the organic food sector.
Originality/value
This study expressively advances the understanding of intentional behavior by exploring organic food within Lithuania's Baltic economy. It authenticates the innovation resistance theory's applicability to organic food behavior in the region while emphasizing the moderating impact of eco-literacy in the link between barriers and purchase intention concerning organic food. Furthermore, using advanced methods such as partial least squares statistical modeling and multi-group analysis, the research reveals how barriers affect the purchase intention of organic food among different groups of consumers.