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Article
Publication date: 18 February 2019

Fen Peng, Wensheng Liu, Yufeng Huang, Siwei Tang, Chaoping Liang and Yunzhu Ma

The purpose of this study is to develop a monolayer surface coating of stearic acid on Sn-Ag-Cu solder powder to limit oxidation.

Abstract

Purpose

The purpose of this study is to develop a monolayer surface coating of stearic acid on Sn-Ag-Cu solder powder to limit oxidation.

Design/methodology/approach

Stearic acid was adsorbed onto Sn-Ag-Cu solder powder through liquid-phase adsorption. The isotherm of adsorption was measured and then the microstructure of coated powder was characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy.

Findings

The adsorption isotherm of stearic acid on the powder was “H” type, which revealed the layer-by-layer adsorption on non-porous surface. When the concentration of solution was in the range of 0.001-0.006 mol/L, with an adsorption amount of 0.12 ± 0.1 mg/g, monolayer stearic acid covered the solder powder completely. Uniform and integrated self-assembled monolayer coating was formed through hydrogen bonds between the oxygen ions in surface lattice of Sn3.0Ag0.5Cu solder powder and the —O—H hydroxyl group of stearic acid. The maximum angle of stability of coated powder also reduced by 2.87° compared with that of non-coated powder. The increase rate of oxygen content of coated powder was much slower than that of non-coated powder when they were exposed to humid air.

Originality/value

As a result, oxidation of fine solder powder was effectively limited. Essentially, this method can also be applied to the coating of other types of solder powder and has reference significance to other coating by liquid-phase method.

Details

Soldering & Surface Mount Technology, vol. 31 no. 1
Type: Research Article
ISSN: 0954-0911

Keywords

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Article
Publication date: 18 February 2019

Fen Peng, Wensheng Liu, Yunzhu Ma, Chaoping Liang, Yufeng Huang and Siwei Tang

To explore substitutes for traditional Sn-Pb solder, Sn-20In-2.8Ag was considered because of its appropriate melting temperature, good reliability and high ductility at…

Abstract

Purpose

To explore substitutes for traditional Sn-Pb solder, Sn-20In-2.8Ag was considered because of its appropriate melting temperature, good reliability and high ductility at less than 100°C. However, the mechanical properties of Sn-20In-2.8Ag were not satisfactory. The reason for the poor mechanical properties of the Sn-20In-2.8Ag/Cu joint was revealed, and a way to solve the problem was found.

Design/methodology/approach

The microstructure evolution, characteristics of melting and solidification and joining performance with Cu were investigated using scanning electron microscopy (SEM), electron probe microanalysis, differential scanning calorimetry (DSC) and mechanical testing.

Findings

SEM results showed that the microstructure of Sn-20In-2.8Ag was composed of coarse dendritic Ag2In and γ phases, with Ag2In distributed at the grain boundaries. DSC measurements revealed that small amount of low temperature eutectic reaction, L → Ag2In + β + γ, occurred at 112.9°C. This reaction was caused by the segregation of indium, which is a process that has a strong driving force. In the lap-shear testing, a crack propagated along the grain boundary of the solder, and failure showed an intergranular fracture. This failure was connected with the three-phase eutectic and coarse Ag2In. Thus, to improve the mechanical properties, segregation of indium should be reduced and coarsening of Ag2In should be prevented.

Originality/value

The reason for the unsatisfactory mechanical properties of Sn-20In-2.8Ag was revealed via microstructural observations and solidification analysis, and the way to solve this problem was found.

Details

Soldering & Surface Mount Technology, vol. 31 no. 1
Type: Research Article
ISSN: 0954-0911

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Article
Publication date: 26 July 2021

Garima Sharma and Rajiv Nandan Rai

Degradation of repairable components may not be similar after each maintenance activity; thus, the classic (traditional-time based) maintenance policies, which consider…

Abstract

Purpose

Degradation of repairable components may not be similar after each maintenance activity; thus, the classic (traditional-time based) maintenance policies, which consider preventive maintenance (PM), age-based maintenance and overhauls to be done at fixed time interval, may fail to monitor the exact condition of the component. Thus, a progressive maintenance policy (PMP) may be more appropriate for the industries that deal with large, complex and critical repairable systems (RS) such as aerospace industries, nuclear power plants, etc.

Design/methodology/approach

A progressive maintenance policy is developed, in which hard life, PM scheduled time and overhaul period of the system are revised after each service activity by adjusting PM interval and mean residual life (MRL) such that the risk of failure is not increased.

Findings

A comparative study is then carried out between the classic PM policy and developed PMP, and the improvement in availability, mean time between failures and reduction in maintenance cost is registered.

Originality/value

The proposed PMP takes care of the equipment degradation more efficiently than any other existing maintenance policies and is also flexible in its application as the policy can be continuously amended as per the failure profile of the equipment. Similar maintenance policies assuming lifetime distributions are available in the literature, but to ascertain that the proposed PMP is more suitable and applicable to the industries, this paper uses Kijima-based imperfect maintenance models. The proposed PMP is demonstrated through a real-time data set example.

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Article
Publication date: 8 October 2018

Lin-Hua Lu and Yi-Fen Huang

This study aims to examine what types of interfirm linkages a firm enters in relation to its manufacturing strategy. The authors further aim to determine whether…

Abstract

Purpose

This study aims to examine what types of interfirm linkages a firm enters in relation to its manufacturing strategy. The authors further aim to determine whether heterogeneous resources have different moderating effects on the relationship between a firm’s manufacturing strategy and interfirm linkages.

Design/methodology/approach

The sample consists of survey and archival data on 80 publicly listed electronics firms from the semiconductor and optoelectronics industries in Taiwan. Because the dependent variable, interfirm linkage, is a binary term, the authors apply logistic regression in our study.

Findings

This paper provides empirical insight into how a firm’s manufacturing strategy affects its probability to engage in specific types of interfirm linkages. The authors find that when a firm pursues an efficiency (flexibility) strategy, it will tend to engage in marketing (technical) interfirm linkages. In addition, absorbed slack strengthens the fit between manufacturing strategy and interfirm linkage type more than unabsorbed slack does.

Research limitations/implications

Because the sample is drawn from the Taiwanese semiconductor and optoelectronic industries, the authors encourage scholars to examine the generalizability of the findings. Future studies can furthermore adopt in-depth interviews to facilitate a better understanding of decision-makers’ considerations when entering interfirm linkages.

Originality/value

This study extends resource dependence theory across a firm’s boundary and applies the resource-based view to resource heterogeneity. The findings advance the understanding of the relationships between strategic orientation, slack resources and interfirm linkage choices. The authors show that it is important that firms consider strategic fit when they create linkages outside their existing boundaries.

Details

Chinese Management Studies, vol. 13 no. 1
Type: Research Article
ISSN: 1750-614X

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Article
Publication date: 1 March 1999

Berlinda (Ching‐Hui) Peng and Brian H. Kleiner

Sets out the US law concerning age discrimination and looks at how recent court cases have ruled out the “ burden of proof” that the employee have to show before winning…

Abstract

Sets out the US law concerning age discrimination and looks at how recent court cases have ruled out the “ burden of proof” that the employee have to show before winning an age discrimination case. Summarizes the legal protection given by the Age Discrimination Employment Act against discrimination in recruitment, again quoting case law to show how this law is being applied.

Details

Equal Opportunities International, vol. 18 no. 2/3/4
Type: Research Article
ISSN: 0261-0159

Keywords

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Book part
Publication date: 11 September 2012

Yue-Juan Pan and Xia Li

The kindergarten curriculum in mainland China has evolved through four periods and the current reform began in the end of 1980s. The reform aimed to transform kindergarten…

Abstract

The kindergarten curriculum in mainland China has evolved through four periods and the current reform began in the end of 1980s. The reform aimed to transform kindergarten practice by shaping ideologies including respect for individual child, active learning, and play-based integrated curriculum. This review of research literatures shows that compared with the practice before the reform, many kindergarten teachers organize classrooms in learning centers, provide more play materials, pay time, and freedom for free play, and pay more attention to individuals. But indoor space organized in rice-seedling-bed model, teacher-led group instruction and teacher-controlled interactions are still often observed after three decades of reform efforts; there still exist great variations among kindergartens of different sponsoring bodies and in different regions. The problems resulted from the innate deficiencies of the top-down and value-priority reform, the conflicts between the advocated value and the traditional Chinese culture with emphasis on Ming-Fen, testing, and the value of children for the whole family and nation, and the unequal distribution of public resources decided by the educational institutions. Therefore, the curriculum reform is not a separate endeavor from other social changes, but a comprehensive and systematic change. To guarantee the success of the curriculum reform, the Chinese society needs cultural transformation and institutional reconstruction.

Details

Early Education in a Global Context
Type: Book
ISBN: 978-1-78190-074-1

Keywords

Content available
Article
Publication date: 15 June 2017

Hsiu-Fen Lin and Kai-Lin Chang

The purpose of this paper is to develop an evaluation model to determine the relative weights of key factors influencing international market development (IMD) success…

Abstract

Purpose

The purpose of this paper is to develop an evaluation model to determine the relative weights of key factors influencing international market development (IMD) success through analysis network process (ANP) during group decision-making. An empirical case of the Taiwan bulk shipping industry is used to illustrate the feasibility of the proposed approach.

Design/methodology/approach

The literature review is performed to generate 20 key success factors (KSFs) along with four factor categories in IMD (such as organizational capability, environmental scanning, international strategy and internationalization behavior). Then, ANP is applied to develop an evaluation model that prioritizes the relative importance linking the above four factor categories with 20 evaluated KSFs.

Findings

With respect to the final weights for factor categories, “international strategy” and “environmental scanning” are the two most important criteria, followed by “organizational capability” and “internationalization behavior”. The results also showed that by reviewing the global weights of the 20 KSFs of IMD, “service as competitive advantage”, “market potential” and “risk taking” have the highest rankings.

Practical implications

The findings indicate that firm expansion into international markets typically depends on a successful international strategy. Hence, to enhance their global market competitiveness, Taiwan bulk shipping firms should focus their efforts on planning international market entry strategy and prioritizing shipping services with high-potential target markets.

Originality/value

Theoretically, the study results can provide both theoretical basis and empirical evidence, indicating the relative weights and priorities of KSFs of IMD for the Taiwan bulk shipping industry. From the managerial perspective, the analytical results can help managers focus on main factors and identify the best policy to improve their IMD practice and performance.

Details

Maritime Business Review, vol. 2 no. 2
Type: Research Article
ISSN: 2397-3757

Keywords

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Article
Publication date: 6 July 2020

Yi-Fen Huang and Lin-Hua Lu

The purpose of this study is to provide evidence on the impact of network flexibility and its ambidextrous influence on a firm's exploratory and exploitative partnership selection.

Abstract

Purpose

The purpose of this study is to provide evidence on the impact of network flexibility and its ambidextrous influence on a firm's exploratory and exploitative partnership selection.

Design/methodology/approach

The authors develop our hypotheses based on the literature of network flexibility and draw on a sample of publicly listed firms in Taiwan semiconductor and optoelectronics industries. The authors collect our data from survey questionnaires and archival sources and examine our hypotheses by using the generalized linear model (GLM) approach.

Findings

The authors’ empirical findings show that configuration flexibility has a greater influence on exploratory partnerships, while manufacturing flexibility has a greater impact on exploitative partnerships. In addition, when firms are ambidextrous (i.e. have both types of flexibility), they are able to simultaneously obtain both exploratory and exploitative partnerships. The authors’ findings indicate that balancing network flexibility is critical when firms execute ambidextrous alliance strategies.

Research limitations/implications

The authors’ use of survey data to measure network flexibility may limit our observations related to network evolution. In addition, the authors’ use of public annual reports to capture firm partnerships may cause us to ignore informal relationships between partners.

Practical implications

The authors’ empirical findings suggest that the types of partnerships firms develop depend on which types of flexibility they possess. The results further suggest that decision makers have to find a way to develop a balanced strategy between network configuration and manufacturing flexibility when they would like to develop an ambidextrous alliance strategy.

Originality/value

The authors’ study advances the understanding in the literature on supply chain flexibility and its ambidexterity by connecting network flexibility and ambidextrous alliance strategy. The authors offer a guide to supply chain managers in the area of network design.

Details

International Journal of Physical Distribution & Logistics Management, vol. 50 no. 6
Type: Research Article
ISSN: 0960-0035

Keywords

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Article
Publication date: 17 April 2007

Wei‐Jaw Deng, Chung‐Ching Chiu and Chih‐Hung Tsai

Failure mode and effects analysis (FMEA) is a preventive technique in reliability management field. The successful implementation of FMEA technique can avoid or reduce the…

Abstract

Failure mode and effects analysis (FMEA) is a preventive technique in reliability management field. The successful implementation of FMEA technique can avoid or reduce the probability of system failure and achieve good product quality. The FMEA technique had applied in vest scopes which include aerospace, automatic, electronic, mechanic and service industry. The marking process is one of the back ends testing process that is the final process in semiconductor process. The marking process failure can cause bad final product quality and return although is not a primary process. So, how to improve the quality of marking process is one of important production job for semiconductor testing factory. This research firstly implements FMEA technique in laser marking process improvement on semiconductor testing factory and finds out which subsystem has priority failure risk. Secondly, a CCD position solution for priority failure risk subsystem is provided and evaluated. According analysis result, FMEA and CCD position implementation solution for laser marking process improvement can increase yield rate and reduce production cost. Implementation method of this research can provide semiconductor testing factory for reference in laser marking process improvement.

Details

Asian Journal on Quality, vol. 8 no. 1
Type: Research Article
ISSN: 1598-2688

Keywords

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Article
Publication date: 11 November 2020

Jana Matošková, Ottó Bartók and Lucie Tomancová

Knowledge sharing becomes crucial in today’s competitive world to foster organizational performance. This paper aims to explore which employee characteristics facilitate…

Abstract

Purpose

Knowledge sharing becomes crucial in today’s competitive world to foster organizational performance. This paper aims to explore which employee characteristics facilitate knowledge sharing in the organizations and to examine the dimensions of these characteristics.

Design/methodology/approach

Opinion-based questionnaires among employees in Czech companies were applied. The research design in this study was cross-sectional. The hypotheses were tested by Pearson’s correlations and regression analyses.

Findings

The findings support the idea that specific individual employee characteristics increase knowledge sharing in the organization. Four categories of potentially appropriate employee individual characteristics were suggested: social and communication skills; positive work feelings; competences for problem-solving; and employee’s self-efficacy. However, only employee’s positive work feelings and self-efficacy significantly predicted the extent of knowledge sharing in the organization.

Practical implications

The findings offer a basis for future research. The results of the study can be used in recruiting new employees and managerial decision-making. The recruitment methods and the selection methods deployed should enable the firm to attract those whose values are in harmony with the organization’s values. Managers should build a work environment that promotes greater and more trusting ties among employees via organizing social activities for employees, a supervisor’s acceptance of an employee’s autonomy and responsibility and increasing employees’ confidence in their abilities.

Originality/value

This is one of the first studies to investigate dimensions of employee knowledge-oriented characteristics. It supports the idea that some individual employee characteristics boost spontaneous knowledge sharing behaviour.

Details

VINE Journal of Information and Knowledge Management Systems, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2059-5891

Keywords

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