Manufacturing
20,000T capacity of copper foil production, optimised for the battery industry.
Copper foil that is used in modern lithium ion batteries is manufactured by electrodeposition and is commonly referred to as ED copper foil. Pure copper wire is first dissolved into a solution, and an electrolytic reaction deposits the copper ions onto a rotating titanium drum.
This results in a uniform copper battery foil, that is tightly controlled to ensure dimensional accuracy and surface finish, optimised for the coating processes used by lithium ion battery manufacturers.
Lithium Battery Copper Foil Process
01
Fluid Preparation
Copper raw material is dissolved in sulfuric acid, with the addition of oxygen and heat to form a copper sulphate electrolyte. The solution produced is tightly controlled through an online monitoring system that automatically adjusts the level of additives in the solution. This ensures the feed liquid chemistry is highly stable, perfect as the precursor to copper battery foil production.
02
ED Raw Foil
The electrolyte solution is pumped onto rotating titanium drums that are partially charged. The process of electrodeposition means that Cu2+ from the electrolyte is deposited onto the cathode drum. The speed of rotation of the drum controls the final thickness of the foil, with thicker foils being produced through slower speeds. The copper foil is stripped off the drum and goes through an anti-oxidation treatment and finally dried and wound onto a core (Plastic or card) to form a roll of copper foil.
03
Slitter & Sheeting Process
The foil is manufactured in widths of up to 1450mm and the foil is slit to the width that the customer requires. The slitting machine is equipped with defect monitoring equipment (CCD) and any defective foil is removed from the final coil to the customer. The coils are finally wrapped and packaged in wooden crates, ready for shipment to customers.
Dissolving
Process of producing electrolyte for making foil by dissolving raw materials in the electrolyte solution.
Plating
Process of producing copper foil of uniform thickness by plating copper ion on drums in electrolyte solution.
Slitting
Slitting to width according to customer specification.
Consistent, Scalable Production for PCB Manufacturing
Copper foil used in printed circuit board (PCB) manufacturing is typically produced by electrodeposition and is commonly referred to as ED copper foil. High-purity copper is dissolved into an electrolyte solution, and an electrolytic reaction deposits copper ions onto a rotating titanium drum.
This process produces a uniform copper foil with tightly controlled thickness and surface profile, optimised for etching, lamination, and reliable bonding in multilayer PCB manufacturing.
PCB Copper Foil Process
01
Fluid Preparation
Copper is dissolved in sulfuric acid to produce a copper sulphate electrolyte, which forms the basis of the electrodeposition process. The solution chemistry is continuously controlled through automated monitoring systems that regulate additive levels and composition, ensuring a stable and consistent electrolyte for high-quality copper foil production.
02
ED Raw Foil
Copper is electrodeposited from the electrolyte onto rotating titanium drums, forming a continuous copper foil layer. The thickness of the foil is precisely controlled by adjusting the drum rotation speed. Once formed, the foil undergoes surface treatment, drying, and is then wound into rolls for further processing and shipment.
03
Rough Foil Treatment
Roughening treatment increases the effective surface area of the copper foil, enhancing mechanical interlocking with the resin system. This improved surface profile promotes stronger adhesion and reliable bonding during PCB lamination, particularly in multilayer board manufacturing where consistent layer integrity is critical.
04
Slitter & Sheeting Process
Copper foil is produced in widths of up to 1450 mm and slit to precise customer specifications. During this stage, CCD monitoring systems inspect the material and remove any defects, ensuring only high-quality foil is included in the final coils. The finished coils are then securely packaged in wooden crates, ready for shipment.