Circuit World: Volume 19 Issue 4

Reliability of Surface‐mounted Anisotropically Conductive Adhesive Joints

J. Liu

The purpose of the work is to investigate the feasibility of using anisotropically conductive adhesives to join surface‐mount devices as solder replacement. The results from a…

Two Novel Additive Processes to Create Circuitry: Direct Laser Writing and Direct Electrostatic Transfer Deposition

P. Soszek

Two new technologies are described for manufacturing circuitry commonly used in printed circuit boards (PCBs), multi‐chip modules (MCMs), hybrid circuits and other applications…

Integration of Thin Film Polyimide with PCB Technology

P. Kersten, H. Reichl

The development of high density packaging technologies offers cost reduction, smaller system volumes and better performance. High performance PCBs with fine line technology reach…

Soldering Techniques for Fine‐pitch SMDs

M.C. Judd

To better understand trends and user experiences with fine‐pitch surface mounted component assembly, the author's company has surveyed a number of manufacturing engineers involved…

High Density Flex‐rigid Circuits — A Solution for Board‐to‐board Transmission Line Interconnects

T.J. Buck

Flex‐rigid circuits have been used for many years, primarily by the military, as a method to reduce the size and increase the reliability of electronic systems. However, in…

Electromigration vs SIR

M.E. Jozefowicz, N.‐C. Lee

The IPC‐SF‐818 surface insulation resistance (SIR) test data taken with the use of a variety of halide‐free, no‐clean fluxes are analysed against Bellcore TR‐NWT‐000078…

A Systematic Evaluation of Factors Influencing TAB Inner Lead Reliability

H.E. Evans, P.M. Harvey, J.L. Dabroski, G.O. Dearing

Reliability evaluations for new electronic components and assemblies regularly require extensive test cycles that are both time consuming and costly. Objectives of such test…

Development of a Novel No‐clean Solder Paste

C. King, T.S. Ong

The electronics industry faces a serious challenge in its approach to the cleaning of printed circuit boards after reflow soldering. A unique approach has been adopted to give…

Computer Aided Design (CAD) for Printed Circuits: Part 1

G. Ferrari

This paper, which will be published in two parts in consecutive issues of Circuit World, reproduces a chapter of the recently published book ‘Handbook of Printed Circuit…

International Institute News

Another benefit to D‐350 users and supporters is now available: D‐350Cevaluation software. Developed for use in evaluating certification programme applications, this software is…

Industry News

Shipley Europe have appointed Alex Kostelecky as Group Sales Director for their range of specialist chemicals and processes for the printed circuit board industry.

New Products

Gypsie is a digitally controlled machine for drilling, routing and milling and is specially designed for tooling printed circuit boards.