The feasibility of using aluminum ribbon wire for ultrasonic bonding of semiconductor microelectronic interconnections was studied, and several advantages over the use of round wire of equivalent cross-sectional area were found. Ribbon wire bonds exhibited little deformation or heel damage, and a greater percentage of bonds of a certain quality (as judged by pull strength and appearance) could be made over much greater ranges of the bonding machine parameters, time and tool tip displacement, using ribbon wire than was possible with round wire. The ease of positioning ribbon wire was indicated by making multiple ribbon wire bonds side-by-side on a 5-mil square pad, or by stacking up to four bonds one on top of another. However, bonding with harder than normal wire, previously thought to offer certain advantages with respect to higher bond tensile strength, yielded inconsistent results.

Excerpt from Microelectronic Interconnection Bonding With Ribbon Wire The feasibility of using aluminum ribbon wire for ultrasonic bonding of semiconductor microelectronic interconnections was studied, and several advantages over the use of round wire of equivalent cross-sectional area were found. Ribbon wire bonds exhibited little deformation or heel damage, and a greater percentage of bonds of a certain quality (as judged by pull strength and appearance) could be made over much greater ranges of the bonding machine parameters, time and tool tip displacement, using ribbon wire than was possible with round wire. The ease of positioning ribbon wire was indicated by making multiple ribbon wire bonds side - by side on a 5-mi1 squareAbout the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

The first edition of this work is considered a classic reference in the field. This new edition updates the entire work and adds 100 pages of information covering new materials and techniques such as fine pitch

From the reviews: "This book is intended for an assembly production house setting, appropriate for management, designers, chief operators, as well as wirebond production engineers. Operational issues such as specifying and optimizing wire and automatic bonders for a product line are included. The book is very good with "visual" explanations for quick grasping of the issues. In addition, the fundamental metallurgical or mechanical root causes behind material and process choices are presented. The book has a clear prose style and a very readable font and page layout. The figures, although effective, are simply low resolution screen prints from a personal computer and thus have aliasing and fuzziness. This book has excellent overall tutorial and enough description of wire and bonding equipment so the reader could specify and negotiate correctly for with suppliers. The majority of the book dwells on establishing the bonding process for a particular product; determining the "window" of adjustments. The book ends with discussions on establishing quality metrics and reliability assurance tests. Each chapter of the book includes enough tutorial information to allow it to alone with little need to page backwards. A short but good reference section is at the end. If you have not read a wirebonding book, or the one you read 10 years ago was borrowed and never returned, now is the time to buy this book." ( CMPT Newsletter, June 2005)

February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index.