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Article
Publication date: 16 May 2008

David R. Selviah, F. Aníbal Fernández, Ioannis Papakonstantinou, Kai Wang, Hadi Bagshiahi, Andy C. Walker, Aongus McCarthy, Himanshu Suyal, David A. Hutt, Paul P. Conway, John Chappell, Shefiu S. Zakariyah and Dave Milward

To introduce the Innovative Electronics Manufacturing Research Centre Flagship Project: Integrated Optical and Electronic Interconnect PCB Manufacturing, its objectives, its…

891

Abstract

Purpose

To introduce the Innovative Electronics Manufacturing Research Centre Flagship Project: Integrated Optical and Electronic Interconnect PCB Manufacturing, its objectives, its consortium of three universities and ten companies and to describe the university research being carried out. This paper briefly reviews the motivation for developing novel polymer formulations, fabrication techniques, layout design rules and characterisation techniques for hybrid electronic and optical printed circuit boards (PCBs) using multimode polymer optical waveguide interconnects.

Design/methodology/approach

The authors are investigating a number of different fabrication techniques which they compare with each other and with modelled calculations of waveguide components. The fabrication techniques include photolithography, laser ablation, direct laser writing, embossing, extrusion and ink jet printing.

Findings

A number of design rules for polymer multimode waveguides have been found and published. Techniques for ink jetting polymer to print waveguides and laser ablation techniques have been developed. New formulations of polymer which cure faster for direct writing have also been developed.

Research limitations/implications

Further work is needed to thicken the ink jet printed polymer and to investigate side wall roughness of the ablated waveguides and development of new polymer formulations for dry film. Further research is also needed on construction of prototype system demonstrators.

Practical implications

The fabrication techniques being developed are designed to be transferred to industrial PCB manufacturers to enable them to make higher value optical PCBs. The design rules being discovered are being entered into commercial PCB layout software to aid designers of optical PCBs.

Originality/value

The paper is of interest to PCB manufacturers who wish to upgrade their processes to be able to manufacture optical PCBs. The university research is original and some has been published as shown in the publications in the reference list.

Details

Circuit World, vol. 34 no. 2
Type: Research Article
ISSN: 0305-6120

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Abstract

Purpose

The purpose of this paper is to provide an overview of the research in a project aimed at developing manufacturing techniques for integrated optical and electronic interconnect printed circuit boards (OPCB) including the motivation for this research, the progress, the achievements and the interactions between the partners.

Design/methodology/approach

Several polymer waveguide fabrication methods were developed including direct laser write, laser ablation and inkjet printing. Polymer formulations were developed to suit the fabrication methods. Computer‐aided design (CAD) tools were developed and waveguide layout design rules were established. The CAD tools were used to lay out a complex backplane interconnect pattern to meet practical demanding specifications for use in a system demonstrator.

Findings

Novel polymer formulations for polyacrylate enable faster writing times for laser direct write fabrication. Control of the fabrication parameters enables inkjet printing of polysiloxane waveguides. Several different laser systems can be used to form waveguide structures by ablation. Establishment of waveguide layout design rules from experimental measurements and modelling enables successful first time layout of complex interconnection patterns.

Research limitations/implications

The complexity and length of the waveguides in a complex backplane interconnect, beyond that achieved in this paper, is limited by the bend loss and by the propagation loss partially caused by waveguide sidewall roughness, so further research in these areas would be beneficial to give a wider range of applicability.

Originality/value

The paper gives an overview of advances in polymer formulation, fabrication methods and CAD tools, for manufacturing of complex hybrid‐integrated OPCBs.

Details

Circuit World, vol. 36 no. 2
Type: Research Article
ISSN: 0305-6120

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Article
Publication date: 27 November 2007

Richard Pitwon, Ken Hopkins and Dave Milward

To present work and characterisation results from a project to develop a pluggable optical connector for board to board interconnect.

251

Abstract

Purpose

To present work and characterisation results from a project to develop a pluggable optical connector for board to board interconnect.

Design/methodology/approach

An optical backplane connection system is described, which allows for repeatable docking and undocking of an active optical interface housed on a daughtercard to waveguides fabricated on an optical backplane.

Findings

The optical backplane connection system described has demonstrated its successful implementation with respect to optical data transfer across multimode polymer waveguides. Measurement results presented show that such a system is a viable approach toward the application of pluggable optical backplane interconnects.

Research limitations/implications

The direct connection to the exposed waveguide interface results in considerable optical loss and scattering. Future designs will have to address this. Additional work should also be undertaken to develop a means of connector engagement that is autonomous and requires no user intervention.

Originality/value

Prior research into the problem of coupling to an optical backplane has been concerned with interfaces that deflect optical signals by 90° into and out of the waveguides. Here, an alternative approach is proposed that launches light directly into the waveguide ends.

Details

Circuit World, vol. 33 no. 4
Type: Research Article
ISSN: 0305-6120

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Article
Publication date: 23 November 2010

Richard C.A. Pitwon, Ken Hopkins, Dave Milward, Malcolm Muggeridge, David R. Selviah and Kai Wang

The purpose of this paper is to present the latest results from research and development into future optical printed circuit board (OPCB) interconnects and low‐cost assembly…

348

Abstract

Purpose

The purpose of this paper is to present the latest results from research and development into future optical printed circuit board (OPCB) interconnects and low‐cost assembly methods.

Design/methodology/approach

A novel method of high‐precision passive alignment and assembly to OPCBs was invented and a full evaluation platform developed to demonstrate the viability of this technique.

Findings

The technique was successfully deployed to passively align and assemble a lens receptacle onto an embedded polymer waveguide array in an electro‐OPCB. The lens receptacle formed a critical part of a dual lens pluggable in‐plane connection interface between peripheral optical devices and an OPCB. A lateral in‐plane mechanical accuracy of ±2 μm has been measured using this technique.

Research limitations/implications

As this is a free space optical coupling process, surface scattering at the exposed waveguide end facet was significant.

Originality/value

This paper details a novel method of passively assembling arbitrary optical devices onto multi‐mode optical waveguides and outlines the procedure and equipment required. A lens coupling solution is also presented which reduces susceptibility of a connecting optical interface to contamination.

Details

Circuit World, vol. 36 no. 4
Type: Research Article
ISSN: 0305-6120

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Article
Publication date: 14 August 2017

Samanthi Ekanayake, Paul Childerhouse and Peter Sun

Social network perspective to interorganizational relations focuses on the effect of organizations’ external relationships in collaboration as opposed to their internal resources…

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Abstract

Purpose

Social network perspective to interorganizational relations focuses on the effect of organizations’ external relationships in collaboration as opposed to their internal resources and capabilities. It presumes that effectively managing such relationships is vital to gaining collaborative synergies. The purpose of this paper is to contribute to the growing interest in the social network perspective to explain supply chain collaboration.

Design/methodology/approach

Literature from the network field is discussed in the context of interorganizational collaboration. A logistics service provider’s network is explored in depth leading to the inductive construction of a multi-level model of social network collaboration.

Findings

The conceptual model provides a useful lens to evaluate supply chain collaboration. The symbiotic relationship between interorganizational and interpersonal networks is highlighted as vital for effective collaboration.

Research limitations/implications

The conceptual model has only been developed from a single network. Wider application is required to ensure generalizability. The critical role of the personal networks of boundary spanning actors at different levels wants further investigation.

Practical implications

Partners’ intra-organizational structures and personal ties of boundary spanners, both at the senior and operational level, have a profound effect on supply chain operations.

Originality/value

Personal networks interact with organizational networks and complement each other in yielding interfirm collaborative synergies.

Details

The International Journal of Logistics Management, vol. 28 no. 3
Type: Research Article
ISSN: 0957-4093

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Article
Publication date: 1 April 1984

UNLIKE many other journals that seem to wallow in doom and gloom, we have been saying for a long time that the recession is receding. In so saying, we are not repeating in parrot…

89

Abstract

UNLIKE many other journals that seem to wallow in doom and gloom, we have been saying for a long time that the recession is receding. In so saying, we are not repeating in parrot fashion the opinion of Government speakers. It is based on our own observation of the world scene.

Details

Work Study, vol. 33 no. 4
Type: Research Article
ISSN: 0043-8022

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Book part
Publication date: 3 November 2017

Graham Taylor

Abstract

Details

Understanding Brexit
Type: Book
ISBN: 978-1-78714-679-2

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Article
Publication date: 1 August 1915

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…

23

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.

Details

New Library World, vol. 18 no. 2
Type: Research Article
ISSN: 0307-4803

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Case study
Publication date: 1 May 2010

LeAnn Beaty

For 28 years Alaska, like the vast majority of the nation, has struggled with growing prison populations and shrinking budgets. In 1995, the Alaska Department of Corrections…

Abstract

For 28 years Alaska, like the vast majority of the nation, has struggled with growing prison populations and shrinking budgets. In 1995, the Alaska Department of Corrections, faced with sanctions unless they ameliorated their crowded prison conditions, looked to the popular practice of contracting out its correctional operations by sending 650 prisoners to a private out-of-state prison. But, as the costs of prisoner litigation and transportation mounted, the state began to consider building its own private prison, a decision which many state lawmakers and business entrepreneurs argued would allow the state to stretch scarce dollars by providing cheaper and better quality prisons, return millions of dollars to the state economy, and create permanent jobs. In this decision case, students are required to put themselves in the role of the Alaska Legislature to determine whether they should permit the building and operation of a private prison in one of Alaska's remote communities. The students must analyze and juggle the complex and often competing set of objectives, values, and political tensions intrinsic to all privatization decisions.

Details

The CASE Journal, vol. 6 no. 2
Type: Case Study
ISSN: 1544-9106

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