Overview of Lead-Free Solder Issuesdownload or print complete guide (pdf) In order to comply with the upcoming legislation of the Restriction of Hazardous Substance (RoHS) Directive in the EU, equipment manufacturers will need to produce reliable electrical equipment using lead-free solders. In fact, there are already many lead-free products, mainly consumer goods, available on the market today. Unfortunately, despite extensive research there is no lead-free alloy which is a drop-in replacement for tin/lead. All of the alternatives are different. Production of reliable product is possible as long as the differences are understood and appropriate lead-free process conditions are developed. Most manufacturers who have developed lead-free processes find that the process window with lead-free is much smaller than was the case with tin/lead and so much better process control is essential. This article lists the steps required to change over to lead-free technology: choosing solder, components, printed circuit board laminates and coatings, production trials, inspection and training. |
