Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of Copper Foil Supplier | High Conductivity Rolled & Electrolytic Copper Foil for Battery, PCB & EMI Shielding in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
Copper Foil Overview
Copper foil is an ultra-thin rolled or electrodeposited copper material widely used in lithium-ion batteries, printed circuit boards (PCB), flexible electronics, electromagnetic shielding, transformers, and precision electronic components.
With excellent electrical conductivity, thermal conductivity, ductility, and corrosion resistance, copper foil has become one of the core materials in modern electronics, batteries, and high-frequency communication industries.
According to manufacturing technology, copper foil is mainly divided into:
Rolled Annealed (RA) Copper Foil
Electrolytic Deposited (ED) Copper Foil
RA copper foil offers excellent flexibility and fatigue resistance, making it ideal for flexible circuits and battery applications. ED copper foil provides excellent dimensional consistency and cost efficiency for PCB manufacturing
Copper foil Specifications
| Item | Specification |
|---|---|
| Material | Pure Copper / C11000 |
| Copper Purity | ≥ 99.8% |
| Thickness | 4μm – 200μm |
| Thickness (Imperial) | 0.00016" – 0.0078" |
| Width | 5mm – 1300mm |
| Width (Imperial) | 0.2" – 51.18" |
| Coil ID | 76mm / 152mm |
| Surface | Matte / Bright / Double Side Treated |
| Conductivity | ≥ 98% IACS |
| Tensile Strength | Customized |
| Elongation | Customized |
| Standard | ASTM / JIS / GB |
Copper Foil Thickness Chart
| Thickness | Common Applications |
|---|---|
| 4μm – 6μm | High Energy Density Lithium Batteries |
| 8μm – 12μm | EV Battery Current Collectors |
| 18μm | Flexible PCB |
| 35μm | Standard PCB |
| 70μm | Power Electronics |
| 105μm+ | Transformer & Industrial Shielding |
Ultra-thin copper foil demand is increasing rapidly in EV battery and flexible electronics industries.
Xi'an Dongmeng Group Co., Ltd. are committed to providing our customers with the highest quality copper foil products, excellent service and competitive prices. We have many years of industry experience and strong technical strength to meet your various copper foil needs.
Copper foil is a cathodic electrolytic material made of pure copper. The thickness is usually between 5 and 100 microns. It is a thin, continuous metal foil deposited on the base layer of the circuit board. It serves as the conductor of the PCB. body. It easily adheres to the insulating layer, accepts the printed protective layer, and forms circuit patterns after corrosion.
It has good electrical conductivity, thermal conductivity and ductility, and is easy to process and shape.
Copper Foil Types
1. Rolled Annealed (RA) Copper Foil
RA copper foil is produced through rolling and annealing processes, providing:
Superior flexibility
Smooth surface
Excellent bending performance
High fatigue resistance
Better high-frequency transmission performance
Widely used for:
Flexible PCB (FPC)
Lithium batteries
EMI shielding
High-speed electronic devices
RA copper foil is especially suitable for dynamic flexing applications and lithium battery current collectors.
2. Electrolytic Deposited (ED) Copper Foil
ED copper foil is manufactured by electrodeposition technology and features:
Uniform thickness
Stable quality
Cost efficiency
Excellent adhesion performance
Widely used for:
Rigid PCB
Copper clad laminates (CCL)
Electronic circuits
Industrial electronics
ED copper foil is also widely used in lithium battery production as an anode current collector.
| Property | RA Copper Foil | ED Copper Foil |
|---|---|---|
| Manufacturing Process | Rolling + Annealing | Electrodeposition |
| Flexibility | Excellent | Moderate |
| Surface Smoothness | Higher | Standard |
| Fatigue Resistance | Excellent | Good |
| Cost | Higher | More Economical |
| Main Applications | FPC / Batteries | PCB / CCL |
| High Frequency Performance | Better | Standard |
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Everything You Need to Know
When purchasing copper foil, there are several factors to consider
1. The role of copper foil in PCB
Copper foil is mainly used as a conductive layer in PCB to connect various components on the circuit board. Copper foil is typically bonded to a base material, such as epoxy or fiberglass board, and then undergoes processes such as printing, plating, and etching to form the desired circuit pattern.
2. Classification of copper foil
Based on production methods and uses, copper foil can be divided into the following categories:
Electrolytic Copper Foil: This is the most commonly used type of copper foil and is produced by electrolysis. Electrolytic copper foil has uniform thickness and good electrical conductivity and is suitable for various types of PCBs.
Calendered Copper Foil: This type of copper foil is produced by the calendering method. Calendered copper foil has thicker thickness and higher mechanical strength, making it suitable for high-frequency and high-power PCBs.
Copper foil: This copper foil is covered with a layer of copper foil on the substrate material. Copper-clad foil has good heat dissipation and shielding properties and is suitable for high-density PCBs.
3. Application of copper foil
In addition to PCBs, copper foil is also used in the following areas:
Lithium-ion battery: Copper foil is the positive current collector of lithium-ion battery and is used to collect the current generated by the positive electrode of the battery.
Electromagnetic shielding: Copper foil has good electrical conductivity and can effectively shield electromagnetic waves, so it is often used to make electromagnetic shielding materials.
Decorative materials: Copper foil has a beautiful appearance and is often used to make decorative materials such as wallpaper, flooring and ceramic tiles.
4. Copper foil production
There are two main methods for producing copper foil:
Electrolysis: This is the most commonly used copper foil production method. The electrolysis method is to pass an electric current through a copper salt solution, and copper ions are deposited on the cathode to form copper foil.
Calendering method: This method is to roll copper rods or copper plates into thin sheets through a calender. The copper foil produced by the calendering method is thicker and has higher mechanical strength.
Copper Foil Application
Lithium-Ion Batteries
Copper foil serves as the anode current collector in lithium batteries and EV battery systems.
Printed Circuit Boards (PCB)
Used as conductive layers for rigid PCB and multilayer electronic circuits.
Flexible Printed Circuits (FPC)
RA copper foil is ideal for foldable electronics and flexible circuits due to excellent flexibility.
EMI / RFI Shielding
Used in:
Communication equipment
RF shielding rooms
Aerospace electronics
Medical electronics
Transformer shielding
Transformers & Power Equipment
Copper foil is widely used in transformer windings and electrical insulation systems.
5G & High Frequency Electronics
Smooth copper foil surfaces help reduce signal loss in high-frequency transmission systems.
| Application:: | Flexible Copper Clad Plate, PCB,Electric Vehicles Li-ion Battery,5G | Thickness: | 4.5um 6um 7um 8um 9um 10um 12um 15um 18um 20um 25um 35um 50um 70um 90um 105um 140um |
|---|---|---|---|
| Width Range: | Can Be Cutting As Per Size Request. | ID: | 76mm,152mm |
| Lead Time: | 7-15days | Sample: | Can Be Supply |
| Length: | Customized | Type: | ED Copper Foil,Rolled Copper Foil |
| / | Item | Typical Thickness | Typical Application And Peculiarity |
| Matte Side Treated | THE/High Temperature Elongation Copper Foil | 12um 18um 35um 70um 105um | Polyimide board, Multilayer board, Middle Tg laminate, Epoxy,CEM-3,FR-4 |
| THE HG Copper Foil | 12um 18um 35um 70um 105um | High Tg ,lead-free and halogen-free, CEM-3,FR-4,FR-5, hydrocarbon substrate, Multilayer board, HDI, High speed board | |
| THE HC Copper Foil | 18um 25um 35um | Positive temperature resistance, high peel strength | |
| Low Profile Copper Foil (LP-S-P/B) | 12um 18um 25um 35um 50um 70um 105um | 2layer FCCL,3L-FPC, EMI, green | |
| Very Low Profile Copper Foil (VLP-S-P/B) | 12um 18um 35um 70um | 2L/3L-FCCL/FPC, EMI, wireless charging, green, Fine circuit pattern, High frequency board . | |
| T1B-DSP/Hyper Very Low Profile Copper Foil | 12um 18um 35um | High frequency transmission circuit ,High speed digital, base station/server, PPO/PPE | |
| T1A-DSP | 12um 18um 35um | High frequency transmission circuit ,High speed digital, base station/server, PPO/PPE | |
| T0A-DSP/5G Copper Foil | 12um 18um 35um | 5G High frequency board, LCP/MPI/MTPI | |
| Shiny Side Treated | RTF/Reverse Treated Copper Foil | 12um 18um 35um 70um 105um | Multilayer board, high frequency board,EMI |
| RTF/-LC1 Low Coarsening Reverse Treated Copper Foil | 12um 18um 35um 50um 70um 105um | High frequency ,Ultra-high frequency ,applying to hydrocarbon board ,High Tg, Fine circuit pattern. Applying to PTFE board . | |
| Low Profile Reverse Treated Copper Foil (LP-D-P/B) | 12um 18um 35um 50um 70um | 2 layer FCCL,,2L-FPC, EMI, wireless charging, green | |
| RT3-MP/Reverse Treated Copper Foil | 12um 18um 35um 70um | High frequency board,applying to hydrocarbon board, High Tg,Fine circuit pattern | |
| RT3-X-MP | 12um 18um 35um 70um | High frequency applying to PTFE board,Fine circuit pattern | |
| RT2A-MP | 12um 18um 35um 70um | Server/switch/storage, PPO/PPE, Mid-low/ultra-low loss | |
| Untreated | Free Profile Copper Foil | 9um 12um 18um 35um 70um | Graphene carrier, special application |
| LBC-01/Double side Shiny Copper Foil | 4.5um 5um 6um 7um 8um 9um 10um 12um | Lithium-ion battery , Notebook PC, Mobile phone, Electric vehicle ,Copper foil capacitor | |
| Double Side Treated | Double Side Treated Copper Foil | 12um 18um 35um 70um | Multilayer board, HDI, special application, |
| Double Side Rough Copper Foil | 9um 10um 12um | Lithium-ion battery , Notebook PC, Mobile phone, XEV: Hybrid- Electric Vehicles (HEV);Parallel Hybrid Electric Vehicles (PHEV); Electric Vehicles (EV). |
| Item | Alloy | Thickness (um) | Width(mm) | Application |
| Rolled copper foil for graphene | C1020 | 12um 18um 25um 35um 50um | ≤630 | Grapheme conductive film production |
| Rolled Copper Foil with Black/red treatment | C1100 | 6um 9um 12um 18um 22um 35um 50um 70um | ≤630 | Flexibility LED,FCCL, Flexible Printed Circuit, flexible copper clad plate, |
| Plain Copper Foil | C1100 | 6um 9um 12um 18um 35um 50um 70um | ≤630 |
Energy storage,Power ., Electric Vehicles Li-ion Battery, 5G Mobile antenna, Heat dissipation |
| High corrosion resistance rolled copper foil(RA Copper Foil _with Nickel plating) | C1100 | 12um 18um 25um 35um 50um | ≤630 | Mess mobile model. will be applied almost of Samsung mobile device |
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copper sheet
Copper sheet is a versatile and widely used material consisting of thin, flat sheets of copper. They come in various thicknesses and sizes, making them suitable for a broad range of applications
Properties of Copper Sheet:
Excellent conductor of heat and electricity: This makes copper sheet ideal for applications requiring efficient heat dissipation or electrical conductivity.
Ductile and malleable: Copper is easily shaped and formed, allowing for intricate designs and precise fabrication.
Corrosion resistant: Copper naturally resists corrosion, making it suitable for use in various environments.
Aesthetic appeal: Copper has a warm, reddish-brown color that can be polished to a bright shine or allowed to develop a natural patina over time.
copper sheet coil
Copper sheet coil, also sometimes referred to as copper coil sheet, is essentially copper sheet sold in a long, rolled format rather than flat sheets. It offers several advantages and caters to specific applications where sheet copper might not be ideal.
Benefits of Copper Sheet Coil:
Cost-effective for large projects: Purchasing copper sheet in coil form can be more economical for larger projects, as it minimizes material waste compared to buying multiple flat sheets.
Reduced seams: Since it's a continuous roll, copper sheet coil minimizes the need for seams or joints in the final product, which can be beneficial for applications requiring a smooth, unbroken surface.
Efficient use of material: Coil allows for precise measuring and cutting to specific lengths, reducing scrap material compared to using pre-cut flat sheets.
Easier handling for large projects: Uncoiling and flattening the copper sheet as needed during the project can be more manageable than handling numerous large flat sheets.
copper strip
Copper strip, a close cousin to copper sheet, is a thin, elongated form of copper available in various widths and thicknesses. Here's a breakdown of copper strip and its key characteristics:
Properties of Copper Strip:
Excellent conductor of heat and electricity: Similar to copper sheet, copper strip offers exceptional thermal and electrical conductivity, making it suitable for applications requiring efficient heat transfer or current flow.
Ductile and malleable: Copper strip retains the good formability of copper, allowing for bending and shaping into desired configurations.
Corrosion resistant: Like copper sheet, copper strip exhibits inherent resistance to corrosion,
copper foil
Copper foil is an incredibly thin sheet of copper, typically much thinner than copper sheet or even copper strip. While all three share similar properties, copper foil's thinness grants it unique characteristics and applications.
Properties of Copper Foil:
Excellent conductor of heat and electricity: Like its thicker counterparts, copper foil offers exceptional thermal and electrical conductivity at a remarkable scale relative to its size.
Highly malleable and ductile: Due to its thinness, copper foil is extremely flexible and can be easily shaped or wrapped around intricate contours.
Lightweight and space-saving: Copper foil's minimal thickness makes it ideal for applications where weight and space are critical factors.
In today's rapidly developing electronics industry, choosing a reliable copper foil supplier is crucial. As an experienced copper foil manufacturer, we are committed to providing customers with high-quality copper foil products, excellent service and competitive prices. We understand your needs and do our best to meet your expectations.
Custom cutting and processing services for copper foil
Copper foil surface treatment services
Copper Foil Testing and Analysis Services
Technical consulting and solution services for copper foil
Reliable supply of copper foil products with different specifications and properties.
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If you need more information, please let us know. We are always available.
Key Features
High Electrical Conductivity
Copper foil offers extremely low electrical resistance and excellent current transmission capability, making it ideal for batteries and electronics.
Excellent Flexibility
RA copper foil provides outstanding bending resistance and fatigue performance for flexible electronic applications.
Ultra-Thin Precision
Available in ultra-thin thicknesses from 4μm for high energy density battery applications.
Strong Adhesion Performance
Surface-treated copper foil improves adhesion between active materials and substrates.
Excellent EMI Shielding Performance
Copper foil is widely used for RF shielding, EMI shielding rooms, communication equipment, and precision electronics.
Corrosion Resistance
Advanced surface treatment technology enhances long-term durability and electrolyte resistance.
Inspection & Quality Assurance
We implement strict quality control systems throughout production:
Raw material inspection
Thickness tolerance testing
Surface roughness inspection
Conductivity testing
Tensile strength testing
Elongation testing
Surface cleanliness inspection
Coil flatness inspection
Third-party inspection is available:
SGS
BV
TUV
Intertek
Product Delivery Standards
Packaging
Export standard wooden pallets
Moisture-proof packaging
Vacuum packaging available
Edge protection for coils
Delivery Forms
Coil
Sheet
Slit strip
Custom cut size
Export Markets
USA
Europe
Southeast Asia
Middle East
South America
FAQ
What is copper foil used for?
Copper foil is mainly used in lithium batteries, PCB manufacturing, flexible electronics, EMI shielding, transformers, and communication equipment.
What is the difference between RA and ED copper foil?
RA copper foil has better flexibility and fatigue resistance, while ED copper foil offers better cost efficiency and uniform thickness.
What thickness copper foil is used in lithium batteries?
Common battery copper foil thicknesses are 4μm, 6μm, 8μm, and 12μm.
Can you provide ultra-thin copper foil?
Yes. We can supply ultra-thin copper foil starting from 4μm thickness.
Do you support customized sizes?
Yes. Customized thickness, width, surface treatment, and coil sizes are available.
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