In PCB industry structure rigid PCB account for 70%, it is the largest, there are four main rigid PCB material to be used in the manufacturing process: CCL (CCL), copper foil, film and all kinds of chemicals, which CCL accounted for the highest proportion of raw material costs, attributable to the costs proportion between 50% to 70%, depending on the number of layers, copper substrate material is mainly fiberglass cloth and electrolytic copper.
Fiberglass cloth, copper and electrolytic copper foil substrate materials are the main material of printed circuit board.