LeadFree deFect Guide 2 SMART Group（无铅缺陷指导2 智能组）.pdf

Lead-Free deFect Guide 2 A Guiding Influence in the Electronics Industry Published June 2008. Welcome to the SMART Group Lead-Free Defect Guide2 We hope that you find this second guide a useful and informative reference for recognising and solving problems within your manufacturing and design process. The SMART Group has been at the heart of disseminating information regarding the diverse research and development needed to implement the change to lead-free soldering. It is due to the knowledge and feedback we have built up, through seminars, the European LEADOUT project, correspondence on our unique Email Forum smart-e-link, that we have been able to confidently put this defect guide together. We would like to thank all of those SMART Group members and speakers at events who have given freely of their time and experience. We hope you find this a useful and informative reference guide. As we in the industry have seen, the defects encountered during and after implementation of lead-free soldering, have brought us a variety of new (and in some cases old) challenges. This lead-free guide is a compilation of defects designed to help managers, designers, engineers and operatives to solve these everyday problems and to let them troubleshoot effectively and efficiently. Amongst all of this change there has also been reassuring constants, good manufacturing still requires intelligent designs, a capable process, reliable manufacturing controls and the people to design, implement and drive them through production with minimum disruption. We hope you find this a useful guide and that it helps you achieve your objective. Naim Kapadia B Eng DMS IET SMART Group Technical Committee Member Manufacturing Engineering Manager, JJS Electronics UK Lead-Free Defect Guide PAGE 3 Introduction Before we look at some of the common and less common lead-free process defects