Hot Sale EPGC 202 FR4 Epoxy Laminate Fiberglass Sheet for Pcb Material
A PCB is sort of like a layer cake or lasagna- there are alternating layers of different materials which are laminated together with heat and adhesive such that the result is a single object.
You will find many different thickness PCBs; the most common thickness for our products is 1.6mm (0.063″). Some of our products use a 0.8mm thick board.
Cheaper PCBs and perf boards (shown above) will be made with other materials such as epoxies or phenolics which lack the durability of FR4 but are much less expensive. You will know you are working with this type of PCB when you solder to it – they have a very distictive bad smell. These types of substrates are also typically found in low-end consumer electronics. Phenolics have a low thermal decomposition temperature which causes them to delaminate, smoke and char when the soldering iron is held too long on the board.