Circuit World: Volume 10 Issue 2


Table of contents

Printed Board Assembly Cleanliness—Standards, Practice and Reliability Considerations

J.R. Taylor

The transition to complex printed board assemblies in modern high technology equipment is described. These low voltage, densely packed PBAs with their decreasing insulation paths…

Printed Circuits—Origins and Development: Part 1

M.E. Pole‐Baker

This study reviews the development of printed circuit technology from its origins before the Second World War until the present day. Various inventions appeared before the war for…

An Introduction to Soldering: Part 2

R.J. Klein Wassink

Components A distinction can be made between components with wire terminations (see Figure 28) and so‐called leadless components (see Figure 29). In between are the components…

Automatic Component Insertion

E.N.E. Nicholson

The Author's company was the first in New Zealand to install automatic insertion equipment. The paper covers the appraisal of the following systems: manual insertion;…

Plasma Desmearing of Multilayer Boards

P.E. Ongley

The paper briefly reviews the problems associated with resin smear in the manufacture of multilayer boards, the various types of material involved, and their influence on smear…


Surface Mounted IC Packages—Their Attachment and Reliability on PWBs

C.J. Brierley, D.J. Pedder

The hermetically sealed ceramic chip carrier package and the plastic small outline (SO) IC package are both now widely used in hybrid microelectronics. These packages are…

Literature abstracts

High Resolution Photolithography and U‐V Curing of an Experimental Positive Resist (in German) MARTIN, B., Elektronik Produktion & Prüftechnik, No. 11, p. 662 (1983). A…

ICT News

The Royal Scot Hotel, Edinburgh, provided the venue for the 6th Annual Northern Symposium on 17th November, 1983, organised by the ICT in conjunction with the ECIF, the Northern…

Industry news

Acquisitions. DEK—UIC DEK Printing Machines Limited (DEK) have announced that negotiations have been concluded with Dover Corporation, New York, to acquire the majority of the…

World's First Refinery for Treatment of Electronic Scrap

On December 8th 1983, Engelhard Industries Ltd opened the first refinery in the world designed and built for and exclusively committed to electronic scrap.

Productronica 83

For those fortunate enough to have the opportunity to indulge in a pre‐exhibition stroll in Munich or its environs during the days prior to and at the start of this year's…

New products

Multi‐pin aluminium electrolytic capacitors for mounting on printed circuit boards are now available from Sprague Electric and its distributors in the UK, Axiom and Swift‐SASCO…

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  • Associate Professor Pooya Davari