Copper Foil
Copper foil is an extremely thin copper strip with a thickness typically between 5-200 microns. Due to its excellent conductivity, thermal conductivity, and processability, it is widely used in the following fields:
1. Electronics and Electrical Industry
Circuit board manufacturing: As the conductive layer of printed circuit boards (PCBs), it is the core material of electronic devices.
Lithium ion battery negative electrode current collector: used for lithium-ion batteries to improve charging and discharging efficiency.
Electromagnetic shielding material: made of shielding film through copper coating or rolling process, used for anti-interference of electronic devices.
2. New energy and energy storage
Photovoltaic industry: As an electrode material for solar cells, it improves the photoelectric conversion efficiency.
Supercapacitors: High purity copper foil is used for electrodes to enhance energy storage performance.
3. Other fields
Decoration and Architecture: Decorative copper foil is made through etching process and used for art or building surfaces.
Thermal conductive material: used as a substrate for heat dissipation fins or thermal management components.
Why choose us
Our Certificate
ISO9001, ISO14001, ISO45001, IATF16949. UL, CMA, SGS.
Sales Market
We export our products to over 20 countries around the world. These include the United States, countries in Europe, and nations in Southeast Asia.
Our service
Before shipment: Laboratory Test and Bulk Inspection.
Description
|
Items |
Electrolytic copper foil, Rolled copper foil , Battery copper foil, Plated copper foil. |
|
Sizes |
Thickness 0.007-0.15mm, Width 10-1200 mm. |
|
Temper |
Annealed, 1/4H, 1/2H, 3/4H, Full hard, Spring. |
|
Finish |
Bare, Tin plated, Nickel plated. |
Physical Properties
Copper foil is characterized by its thinness, flexibility, and durability. Some key physical properties include:
Thickness
Typically ranges from 9 to 140 micrometers.
Density
Approximately 8.9 g/cm³.
Melting point:
1084.62°C (1984.32°F).
Tensile strength
Varies based on thickness and manufacturing process.
Electrical Properties
The electrical properties of copper foil are what make it particularly valuable in electronics:
Electrical conductivity
5.96 × 10^7 S/m at 20°C.
Resistivity
1.68 × 10^-8 Ω·m at 20°C.
Temperature coefficient of resistance
0.003862 K^-1.
Thermal Properties
Copper foil's thermal characteristics contribute to its usefulness in heat management applications:
Thermal conductivity
401 W/(m·K) at 25°C.
Coefficient of thermal expansion
16.5 × 10^-6 K^-1 at 20°C.
The chemical properties of copper foil affect its durability and applications:
Corrosion resistance: Generally good, but can tarnish in presence of sulfur.
Oxidation: Forms a protective layer of copper oxide when exposed to air.
Reactivity: Reacts with acids and strong bases.
Based on Surface Treatment
Different surface treatments are applied to copper foil for specific applications:
Untreated copper foil.
01
Treated copper foil (for improved adhesion).
02
High-temperature elongation (HTE) treated foil.
03
Low-profile copper foil.
04
Reverse-treated copper foil.
05
Packing & Delivery
Standard seaworthy export packaging. Wooden pallets with plastics protection for the coil and sheet. Packaging services can be provided according to different regional temperatures of customers.
FAQ
We're well-known as one of the leading copper foil manufacturers and suppliers in China. Please feel free to wholesale high quality copper foil from our factory. For customized service, contact us now.
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