Samsung, SMT, production circuit board video

Civen RA Copper Foil is rolled from pure copper ingots, the process including purifying copper ores, make into copper cathodes, ingoting, rolling, annealing, washing, testing, slitting and packing. Our copper ores are imported from South America, which were famous for their copper mining.​
Civen metal can provide copper foil for Printed Circuit Board Production, please give me a mail: sales@civen-inc.com
also, can visit our web: http://www.civen-inc.com/