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Article
Publication date: 7 August 2018

Cuiming Du, Yanxia Xing, Liangpeng Hao, Peng Hu and Songgang Chai

This paper aims to investigate and document the effects of copper-clad laminate (CCL) inorganic filler on the hole performance in printed circuit boards drilling process.

Abstract

Purpose

This paper aims to investigate and document the effects of copper-clad laminate (CCL) inorganic filler on the hole performance in printed circuit boards drilling process.

Design/methodology/approach

Drilling of brittle laminates can result in hole cracking, layer-to-layer delamination and drill-bit wear and tool breakage. Adding large amount of fillers not only shortens the life of the drilling tool but also affects the drilling properties significantly regarding hole quality. This paper introduces the influence of filler content, type, hardness, particle size and the compounding method in the manufacture of the CCL on the drilling performance.

Findings

The filler content, filler type, hardness of filler, particle size of filler and the compounding method used for the filler have a great influence on the drilling properties of CCL. The higher the filler content, the larger the particle size and the more the hardness of the filler, the worse the drilling properties. The combination of hard particles like silica with softer particles can improve the drilling performance of CCL.

Originality/value

The paper describes what affects the drilling performance of CCL and how this knowledge can be used to design CCL with good drilling performance.

Article
Publication date: 19 October 2012

Shirley Hsiao‐Li Sun

The purpose of this paper is to investigate in the context of the persistent low fertility that contributes to an ageing society, what might be the shifting roles of state and…

2042

Abstract

Purpose

The purpose of this paper is to investigate in the context of the persistent low fertility that contributes to an ageing society, what might be the shifting roles of state and family in caring for children?

Design/methodology/approach

This paper aims to address this research question by drawing on the conceptual framework of “social care” (Daly and Lewis), and on data collected through a qualitative study concerning the state's population policies aimed at encouraging childbearing among citizens in Singapore.

Findings

Three themes from the interview data relate to the various dimensions of care: first, in terms of care‐as‐responsibility, interviewees consider childbearing a long‐term commitment. In this context, they perceive the current Baby Bonus scheme only as a short‐term benefit, having limited effects. Second, regarding care‐as‐costs, interviewees pointed out that some important social services are not universally affordable. In particular, they expressed a need for more state funding to put education and healthcare within the reach of the general public. Third, in terms of care‐as‐labour, care‐giving for young children by family members continues to be seen as ideal. However, there is a gap between such an ideal and the reality.

Research limitations/implications

These findings suggest a greater financial and regulatory role for the state in childcare provision is increasingly vital.

Practical implications

As it stands, there is a mismatch of people's expectations and available policy initiatives, and this mismatch possibly undermines the success of the government's policy of encouraging childbearing.

Originality/value

This research complements existing studies based on content analysis of policy or statistical analysis of survey data.

Details

International Journal of Sociology and Social Policy, vol. 32 no. 11/12
Type: Research Article
ISSN: 0144-333X

Keywords

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