What’s in a circuit board?

Printed circuit boards (PrCBs) are used in everything from toys and TVs, to computers, phones, telecom servers, and other forms of electronic waste. Printed circuit boards are made up of about 35% metals and 65% non-metals, by weight.

Metals breakdown

Most common: Gold, Silver, Copper, Palladium
Base metals (i.e. Tin, Zinc, Nickel, Lead, Aluminum)
Platinum group metals (i.e. Platinum, Rhodium)
Conflict minerals (i.e. Indium, Tantalum)
Rare-earth metals (i.e. Yttrium, Europium)

Non-metals breakdown

Hazardous Chemicals
(i.e. Beryllium, Brominated flame retardants)