Your Professional Ultra-thin Copper Foil Supplier!
Shaanxi Huiyou Shengbang Precision Foil Manufacturing Co., Ltd. specializes in the production of Non-Ferrous Metal Foils, Refractory Metal Foils, Rare (Precious) Metal Foils, Speaker Parts, Titanium Stamping Parts,etc.
Product Application
Our company's titanium foil is used in 3C, chemical, and battery industries; tin foil is used in the electronics field to make circuit boards, etc.zirconium foil is mainly used in nuclear reactors and aerospace; copper foil is used in condensers, heat exchangers, etc.
Advanced Production Equipment
Our company has advanced Sendzimir twenty-high rolling mill, four-high rolling mill, tensioning and leveling machine, annealing furnace, metal slitting machine, foil cleaning and deoiling unit and other equipment.
Quality Guaranteed
Shaanxi HYSB Precision Foil Co., Ltd.Companies get GB/T19001-2016/1S09001:2015Quality management system certification.
Quick response
We promise to respond to your inquiries within 24 hours to ensure that you receive the information and support you need in a timely manner.
Characteristics of Ultra-thin Copper Foil
Extremely thin: The thickness of ultra-thin copper foil is extremely small, usually below a few microns, to adapt to smaller packaging sizes and higher wiring density.
High conductivity: As an excellent conductive material, ultra-thin copper foil has higher conductivity and can effectively improve the energy density and charging and discharging efficiency of the battery.
Lightweight: Its thinner thickness and lighter weight help to achieve the thinness of the battery and improve the portability of the product.
Excellent ductility: Ultra-thin copper foil can adapt to various complex shapes and structures during the battery manufacturing process, improving the manufacturing efficiency and reliability of the battery.
High precision and flatness: In order to ensure the fine circuit production on the packaging substrate, ultra-thin copper foil needs to have extremely high surface flatness and thickness uniformity.
Excellent heat resistance: During the packaging process, copper foil needs to withstand high temperatures, so it requires good stability at high temperatures.
Good peeling performance: For peelable ultra-thin copper foil, it is required to be able to be easily and cleanly peeled off from the carrier layer or insulating base film while maintaining the integrity of the copper foil itself.
Electronic Product Manufacturing
Ultra-thin copper foil is widely used in the manufacture of various electronic products, such as mobile phones, tablet computers, laptops, etc., due to its excellent conductivity and strippable properties. In mobile phone production, it can be used to make mobile phone antennas and circuit boards.
Lithium Battery
Ultra-thin copper foil is one of the key materials for lithium batteries. As a carrier of negative electrode active materials and negative electrode current collector, it can efficiently conduct current and improve the energy density and charge and discharge performance of the battery. At the same time, it also helps to reduce the amount of negative electrode materials and reduce costs.
Solar Cells
Ultra-thin copper foil can be used as a conductive layer for solar cells, helping solar cells to efficiently convert solar energy and improve the power conversion efficiency of solar cells.
Flexible Circuit Boards
Using the strippable properties and flexibility of ultra-thin copper foil, flexible circuit boards can be made, which can be disassembled and reused multiple times, and are suitable for application scenarios that require frequent replacement or adjustment of circuits.
Other fields
Ultra-thin copper foil is also widely used in electronics, communications, electricity and other fields, such as as a supporting material for diaphragms to improve the mechanical strength and stability of diaphragms, and in various occasions requiring high electrical conductivity, high thermal conductivity and high flexibility.
Thickness of ultra-thin copper foil
According to the thickness classification of copper foil, the thickness of ultra-thin copper foil is defined in the range of 6μm to 12μm. Due to its extremely thin thickness, ultra-thin copper foil is particularly suitable for high-frequency circuits and miniaturized devices, and can meet the strict requirements of these fields on material thickness and performance.

Processing process of ultra-thin copper foil
Electrolytic copper dissolution
Electrolytic copper or wire return material of equivalent purity is used as raw material and dissolved in a solution containing copper sulfate. Through the electrolytic process, copper ions are deposited on the cathode roller to form copper foil. The thickness of the copper foil is controlled by the cathode current density and the rotation speed of the cathode roller.
Surface treatment
This process is mainly based on electrochemical reaction and is divided into three stages. The first stage forms a coarsening layer to maintain the dendritic crystal structure composed of copper and copper oxide; the second stage adds brass or zinc as a barrier layer to prevent substrate contamination such as particle migration; the third stage is to plate zinc, nickel, tin and other metals or alloys on the surface of the copper foil as an anti-oxidation coating.
Slitting and packaging
The electrolytic and surface-treated copper foil is sheared and packaged for subsequent application and transportation.

Conductivity:
As a processed product of metallic copper, ultra-thin copper foil retains the excellent electrical conductivity of copper itself. Its electrical conductivity is second only to silver, and its price is much lower than silver, so it has become a key material in the electrical industry.In the electronics industry, ultra-thin copper foil is a key material for printed circuit boards (PCBs), and plays an important role as a conductor to connect various electronic components.
Thermal conductivity:
Ultra-thin copper foil also has excellent thermal conductivity and can quickly transfer heat from one place to another.However, as the thickness of the copper foil decreases, especially when the thickness drops to a certain extent, the temperature gradient will rise sharply, which may affect the thermal conductivity. Therefore, in some applications with high thermal conductivity requirements, it is necessary to select copper foil of appropriate thickness to ensure good thermal conductivity.
Packaging and transportation of ultra-thin copper foil
Handling method: Considering the thin and fragile characteristics of ultra-thin copper foil, handling tools and equipment designed for copper foil, such as padded transport vehicles or suction cup handling machinery, should be used to minimize damage to the copper foil.
Pre-packaging preparation: Before packaging, the copper foil products need to be strictly inspected for quality to ensure that their surfaces are clean and dust-free and meet quality standards. In addition, waterproof treatment is required, and the copper foil is placed on a waterproof film to prevent it from moisture and corrosion.
Packing operation: Use cushioning material to wrap the copper foil evenly to avoid physical impact. Then put the wrapped copper foil neatly into the carton and add additional cushioning material to fix its position. Finally, use sealing tape to seal the carton to ensure the integrity of the package.
Marking and inspection: Clearly mark the product name, specifications, quantity and related warning signs on the package for identification and inspection. After the packaging is completed, the package must be inspected to ensure that the carton, sealing tape, packaging logo and the stability of the copper foil meet the requirements.
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Frequently Asked Questions
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