Beyond RoHS

The RoHS requirement came into being as a way to remove potentially hazardous materials from coming into contact with people and from entering the world ecology through improper disposal.  Beryllium (Be), cadmium (Cd), chromium (Cr), mercury (Hg), arsenic (As), and lead (Pb) are among the most common metals that bear discussion.  They have not nearly […]

Why Lead-free RoHS Circuit Board Assemblies?

The Restriction of Hazardous Substances (RoHS) directive 2002/95/EC began as a European movement to decrease the deposition into the environment of known carcinogens and to enhance the recyclability of mixed-material waste. The goal was to create a new generation of electrical products that are free of substances hazardous to health and the environment. Initially all […]

“Boilerplate”

Boilerplate is a good thing to have on the side of a steam locomotive but questionable in the engineering notes for a printed circuit board. There are many options available to which most of us never give a second thought.  The Gerber files contain the traces and outline but rarely the tolerances.  Some common specifications […]