Why Choose Our Pure Copper Foil？
- A pure copper foil manufacturing facility with 10+ years of experience, serving hundreds of clients.
- A 30+ material quality control inspection process to achieve high standards and the same quality across batches.
- Free samples and rapid prototyping customisation available
- Compliant with REACH, RoHS 2.0 + HF + PFOS, CMRT CA Prop 65 (US only), UL94, and other regulations
- One-stop services including product selection, customised design, die-cutting, reliability testing, and pre-assembly
Your Reliable Pure Copper Foil Supplier
Benefiting from the exceptionally high conductivity and lower resistance of pure copper foil, it delivers superior and more stable EMI shielding performance. You may use it in high-frequency electronic applications to achieve more reliable products and longer service life. Furthermore, its thickness, dimensions, shape, surface finish and other characteristics can be customised to suit your specific application requirements.
As a trusted Chinese pure copper foil manufacturer, GALLOP INNOTEK provides high-quality electrolytic pure copper foil and rolled pure copper foil. Our in-house laboratory and advanced testing equipment achieve the consistent reliability of our pure copper foil. We also offer a one-stop service from specification selection to pre-assembly, minimising delivery lead times.
Features of Pure Copper Foil
Manufactured from high-purity copper containing virtually no impurities, minimising performance fluctuations during operation.
Approaching 100% IACS conductivity, maximising electromagnetic shielding efficiency and signal integrity.
Make sure efficient electrical conductivity, enhancing EMI shielding capability and the reliability of your products.
Enhancing heat dissipation efficiency while providing EMI shielding, thereby facilitating superior thermal management.
Excellent Flexibility & Processability
Due to its near-total absence of impurities, pure copper foil has a more stable structure, achieving superior flexibility and bendability. It is less prone to fracture or defects during intricate processing and offers more predictable performance characteristics. Consequently, it is well-suited for techniques such as stamping, die-cutting, and lamination. Furthermore, it integrates seamlessly into various automated production lines, meeting your demands for efficient processing. Our pure copper foil achieves a purity of 99.99%, offering excellent processing compatibility.
Designed for EMI Applications
GALLOP INNOTEK offers customisable options in multiple thicknesses, dimensions and shapes to facilitate subsequent processing and handling. You may also select varied surface treatments, such as differing degrees of roughness, to achieve diverse bonding applications. Furthermore, pure copper foil can be processed into strip materials, die-cut components and pre-formed coil materials for streamlined subsequent fabrication. We support rapid prototyping and selection guidance to prevent delays and increased costs arising from modifications.
Long-term and Dependable Choice
Compared to standard copper foil, pure copper foil contains fewer impurities and boasts higher purity, resulting not only in superior performance but also enhanced resistance to ageing. On the one hand, pure copper foil offers more consistent and stable electrical conductivity. On the other hand, it has a longer service life. GALLOP INNOTEK subjects all pure copper foil leaving our factory to rigorous inspection and testing. Whether for small or large batches, we consistently achieve high quality and efficiency.
Applications of Pure Copper Foil
Pure copper foil can be processed into high-performance EMI shielding materials for use as a shielding layer in electronic equipment, cables, and similar applications.
Pure copper foil can better withstand the bending and processing of flexible circuits and electronic interconnections while maintaining good performance.
When used in power modules, battery current collectors, and converters, it enhances current transmission efficiency and facilitates superior heat dissipation.
Used in automotive, industrial control systems, aerospace and other applications to maintain electrical reliability and control electromagnetic interference.
Pure copper foil uses copper material of higher purity, containing virtually no other alloying elements. Consequently, it has lower electrical resistance and higher electrical and thermal conductivity than standard copper foil. It also has stronger and more stable EMI shielding capabilities.
The higher the copper purity, the fewer impurities present, making copper foil deliver better electromagnetic shielding performance and minimise signal leakage. However, this also results in higher investmen. You can consider our recommendations before choosing pure copper foil.
Thinner pure copper foil is lighter in weight, making it suitable for compact applications. It also enhances signal integrity. Thicker pure copper foil provides stronger electromagnetic shielding and improved heat dissipation. However, thicker pure copper foil comes at a higher cost.
Electrolytic pure copper foil is produced by electroplating and is typically of greater thickness. As it undergoes no physical processing, its surface is coarser. Rolled copper foil is manufactured through rolling and annealing, offering superior ductility and flexibility alongside a thinner profile.
Pure copper foil achieves a copper content of 99.99%, yet it also contains trace amounts of alloying elements such as silver, tin, zinc, and nickel.
Pure copper foil can reflect interfering electromagnetic waves, preventing them from entering equipment. It can also utilise its high conductivity through grounding design to divert interference currents into the earth connection.
What is Pure Copper Foil？
Pure Copper Foil is a copper foil with an exceptionally high copper content(approximately 99.99%). Due to the minimal addition of other alloying materials, pure copper foil achieves outstanding electrical conductivity, thermal conductivity, and extremely low electrical resistance. This allows it to offer excellent electromagnetic shielding capabilities, used in applications with extremely demanding performance requirements (such as batteries, precision equipment, flexible circuits, semiconductor devices, etc.). It is primarily available in types such as electrolytic copper foil and rolled copper foil to meet various application requirements.
Types of Pure Copper Foil
Electrolytic Pure Copper Foil
Electrolytic pure copper foil is produced by electroplating high-purity copper. As this process is more straightforward, it has a lower initial cost. It is thicker and rougher, making it suitable for rigid PCBs and providing better adhesion to substrates. However, the rough surface also results in greater signal transmission loss. Nevertheless, it remains highly cost-effective.
Rolled Pure Copper Foil
Rolled pure copper foil is produced through physical processing such as rolling and high-temperature annealing. Following rolling, the pure copper foil becomes thinner and smoother, requiring roughening treatment to achieve greater bonding capability. Its processing is more complex and necessitates more expensive processing equipment. Consequently, you may incur higher costs. However, it possesses superior ductility compared to electrolytic pure copper foil.
How to Choose the Right Rolled Pure Copper Foil?
Select based on Voltage and Current Levels
You must select based on the application’s maximum voltage and current levels, opting for pure copper foil with a current capacity exceeding these values. Additionally, you should also choose the resistance, as lower resistance has better electromagnetic shielding.
Consider the Operating Environment
Different applications impose varying requirements on pure copper foil. For instance, in EMI shielding and ground connections, low resistance should be considered. For applications requiring auxiliary heat dissipation, you need to know the thickness of the copper foil. For flexible electronics, however, one should select pure copper foil with superior resistance to bending.
Select the Thickness of Pure Copper Foil
The thickness of pure copper foil affects its current-carrying capacity, electrical resistance, and hardness. Thinner pure copper foil offers superior conformability and bendability. Thicker pure copper foil provides enhanced electromagnetic shielding capability but is more susceptible to fracture under bending stress. In practical applications, selection should be based on clearly defined requirements. GALLOP INNOTEK provides selection guidance and complimentary samples to facilitate informed decision-making.
