Based on the results of a more than two-year study, Lead-Free Electronics: iNEMI Projects Lead to Successful Manufacturing is the first practical, primary reference to cover Pb-free solder assembly as well as the analysis and reasoning behind the selection of Sn-Ag-Cu as the recommended Pb-free replacement for Sn-Pb. Reflecting the results of a two-year study, Lead-Free Electronics: iNEMI Projects Lead to Successful Manufacturing provides full coverage of the issues surrounding the implementation of Pb-free solder into electronic board assembly. This book is extremely timelyâ??most electronic manufacturers are going to change over to Pb free soldering by 2006 to meet new European laws. All manufacturers around the globe are going to be affected by this change. The text provides specific results from the thirty company NEMI project activities. It contains integrated and fully documented book chapters with references to existing published work in the area. These serve as tremendous resources for engineers and companies faced with making the switch to Pb-free solder assembly.

Even though the effect of lead contamination on human health has been known for decades, very little attention has been paid to lead-based solders used in electronics until recently. This comprehensive book examines all the important issues associated with lead-free electronic solder. It collects the work of researchers recognized for their significant scientific contributions in the area.

ELECTRONICS MANUFACTUIRNG WITH LEAD-FREE, HALOGEN-FREE, AND CONDUCTIVE-ADHESTIVE MATERIALS This comprehensive guide provides cutting edge information on lead-free, halogen-free, and conductive-adhesive technologies and their application to low-cost, high-density, reliable, and green products. Essential for electronics manufacturing and packaging professionals who wish to master lead-free, halogen-free, and conductive-adhesive problem solving methods, and those demanding cost-effective designs and high-yield environmental benign manufacturing processes, this valuable reference covers all aspects of this fast-growing field. Written for design, materials, process, equipment, manufacturing, reliability, component, packaging, and system engineers, and technical and marketing managers in electronics and photonics packaging and interconnection, this book teaches a practical understanding of the cost, design, materials, process, equipment, manufacturing, and reliability issues of lead-free, halogen-free, and conductive-adhesive technologies. Among the topics explored: * Chip (wafer) level interconnects with lead-free solder bumps * Lead-free solder wafer bumping with micro-ball mounting and paste printing methods * Lead-free solder joint reliability of WLCSPs on organic and ceramic substrates * Chip (wafer) level interconnects with solderless bumps such as Ni-Au, Au, and Cu, Cu wires, Au wires, Au studs, and Cu studs * Design, materials, process, and reliability of WLCSPs with solderless interconnects on PCB/substrate * Halogen-free molding compounds for PQFP, PBGA, and MAP-PBGA packages * Environmentally benign die-attach films for PQFP and PBGA packages and lead-free die-attach bonding techniques for IC packaging * Environmental issues for conventional PCBs and substrates * Some environmentally conscious flame-retardants for PCBs and organic substrates * Emerging technologies for fabricating environmental friendly PCBs such as design for environment, green PCB manufacturing, and environmental safety * Lead-free soldering activities such as legislation, consortia programs, and regional preferences on lead-free solder alternatives * Criteria, development approaches, and varieties of alloys and properties of lead-free solders * Physical, mechanical, chemical, electrical, and soldering properties of lead-free solders * Manufacturing process and performance of lead-free surface finishes for both PCB and component applications * Implementation and execution challenges of lead-free soldering, especially for the reflow and wave soldering process * Fundamental understanding of electrically conductive adhesive (ECA) technology * Effects of lubricant removal and cure shrinkage on ECAs * Mechanisms underlying the contact resistance shifts of ECAs * Effects of electrolytes and moisture absorption on contact resistance shifts of ECAs * Stabilization of contact resistance of ECAs using various additives

Solders have given the designer of modern consumer, commercial, and military electronic systems a remarkable flexibility to interconnect electronic components. The properties of solder have facilitated broad assembly choices that have fueled creative applications to advance technology. Solder is the electrical and me chanical "glue" of electronic assemblies. This pervasive dependency on solder has stimulated new interest in applica tions as well as a more concerted effort to better understand materials properties. We need not look far to see solder being used to interconnect ever finer geo metries. Assembly of micropassive discrete devices that are hardly visible to the unaided eye, of silicon chips directly to ceramic and plastic substrates, and of very fine peripheral leaded packages constitute a few of solder's uses. There has been a marked increase in university research related to solder. New electronic packaging centers stimulate applications, and materials engineering and science departments have demonstrated a new vigor to improve both the materials and our understanding of them. Industrial research and development continues to stimulate new application, and refreshing new packaging ideas are emerging. New handbooks have been published to help both the neophyte and seasoned packaging engineer.

Assessing the scientific and technological aspects of lead-free soldering, Lead-Free Soldering in Electronics considers the necessary background and requirements for proper alloy selection. It highlights the metallurgical and mechanical properties; plating and processing technologies; and evaluation methods vital to the production of lead-free solders in electronics. A valuable resource for those interested in promoting environmentally-conscious electronic packaging practices! Responding to increasing environmental and health concerns over lead toxicity, Lead-Free Soldering in Electronics discusses: Soldering inspection and design Mechanical evaluation in electronics Lead-free solder paste and reflow soldering Wave soldering Plating lead-free soldering in electronics Lead-Free Soldering in Electronics will benefit manufacturing, electronics, and mechanical engineers, as well as undergraduate and graduate students in these disciplines.