Copper foil, a kind of negative electrolytic material, is deposited on base layer of PCB to form continuous metal foil and is the conductor of PCB.
Circuit Prototyping using Copper Tape - element14 Community
Bonding Force Between Copper Foil Pad and PCB Board - Technical Article - News - Shenzhen Grande Electronic Co., Ltd
PCB Copper Foil, PCB and Assembly Manufacturer
What is Copper Foil? - Technical Terms by Eurocircuits
Introduction of high frequency high speed materials for 5G circuit board. - PCBSky
Copper Foil PCB – Types and Top Manufacturers in the World – Hillman Curtis: Printed Circuit Board Manufacturing & SMT Assembly Manufacturer
News - The Role of Copper Foil in the Circuit Board Industry
Some Basics about Copper Foil in PCB
Copper Base PCB Manufacturers