A very important part of printed circuit board (PCB) design involves sizing traces and vias to carry the required current. This exciting new book will explore how hot traces and vias should be and what board, circuit, design, and environmental parameters are the most important. PCB materials (copper and dielectrics) and the role they play in the heating and cooling of traces are covered. The IPC curves found in IPC 2152, the equations that fit those curves and computer simulations that fit those curves and equations are detailed. Sensitivity analyses that show what happens when environments are varied, including adjacent traces and planes, changing trace lengths, and thermal gradients are presented. Via temperatures and what determines them are explored, along with fusing issues and what happens when traces are overloaded. Voltage drops across traces and vias, the thermal effects going around right-angle corners, and frequency effects are covered. Readers learn how to measure the thermal conductivity of dielectrics and how to measure the resistivity of copper traces and why many prior attempts to do so have been doomed to failure. Industrial CT Scanning, and whether or not they might replace microsections for measuring trace parameters are also considered.

The worldwide trend toward lead-free components and soldering is especially urgent in the European Union with the implementation strict new standards in July 2006, and with pending implementation of laws in China and California. This book provides a standard reference guide for engineers who must meet the new regulations, including a broad collection of techniques for lead-free soldering design and manufacture, which up to now have been scattered in difficult-to-find scholarly sources.

Both a handbook for practitioners and a text for use in teaching electronic packaging concepts, guidelines, and techniques. The treatment begins with an overview of the electronics design process and proceeds to examine the levels of electronic packaging and the fundamental issues in the development

The World's #1 Guide to Printed Circuit Boards_Now Completely Updated with the Latest Information on Lead-Free Manufacturing! The best reference in the field for over 30 years, the Printed Circuits Handbook equips you with definitive coverage of every facet of printed circuit assemblies_from design methods to fabrication processes. Now completely revised and updated, the Sixth Edition presents the latest information on lead-free manufacturing, including lead-free PCB design and fabrication techniques, lead-free materials, and lead-free reliability models. The new edition also explores best practices for High Density Interconnect (HDI), as well as flexible printed circuits. Written by a team of experts from around the world, the Sixth Edition of this renowned handbook contains cutting-edge material on engineering and design of printed circuits fabrication methods…assembly processes… solders and soldering…test and repair…waste minimization and treatment …quality and reliability of printed circuit processes…and much more. The updated Printed Circuits Handbook provides you with: Unsurpassed guidance on printed circuits_from design to manufacturing Over 500 illustrations, charts, and tables for quick access to essential data New to this edition: New coverage of lead-free PCB design and manufacturing techniques, lead-free materials, lead-free reliability models, best practices for High Density Interconnect (HDI), and flexible printed circuits Inside This State-of-the-Art Printed Circuits Guide • Introduction to Printed Circuits • Engineering and Design of Printed Circuits Fabrication Processes • Assembly Processes • Solders and Soldering • Test and Repair • Waste Minimization and Treatment • Quality and Reliability of Printed Circuit Processes • Flexible Circuits