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0.01-1mm high conductivity thin copper foilIt is a type of negative electrolytic material, which is a thin, continuous metal foil deposited on the substrate layer of a circuit board. It serves as a conductor for PCB. It is easy to adhere to the insulation layer, accept printed protective layers, and form circuit patterns after corrosion. According to relevant information, copper foil has low surface oxygen properties and can be attached to various substrates such as metals, insulation materials, etc., with a wide temperature range of use. Mainly used for electromagnetic shielding and anti-staticConductive copper foilPlaced on the substrate surface, combined with a metal substrate, it has excellent conductivity and provides electromagnetic shielding effect. Generally speaking, it is adhered to the insulation layer, forming a corresponding protective layer on the surface through printing technology, and then forming a circuit pattern through corrosion.
Classification of conductive copper foil:
1. The process of conductive copper foil can be divided into electrolytic copper foil andRolled Copper FoilDue to its cost and process advantages, electrolysis has become the mainstream process for copper foil production both domestically and internationally. The vast majority of copper foil production enterprises in China also adopt electrolysis, and in 2017, the proportion of electrolytic copper foil production in China reached as high as 98%.
2. Electrolytic copper foil is mainly classified into electronic circuit copper foil and lithium battery copper foil according to downstream applications. The former is used for PCB and copper-clad laminates, while the latter is used as a negative electrode carrier for lithium batteries.
3. According to the thickness of conductive copper foil, it can be divided into ultra-thin copper foil (≤ 6 μ m), ultra-thin copper foil (6-12 μ m), thin copper foil (12-18 μ m), conventional copper foil (18-70 μ m), and thick copper foil (>70 μ m).
With the rapid development of new energy and electronics industries,Electrolytic copper foilThe industry's output has also developed rapidly and synchronously. According to data from the Electronic Copper Foil Materials Branch of the China Electronics Materials Association, the production of electrolytic copper foil in 2019 increased by 9.0% year-on-year from 395200 tons in 2018 to 430600 tons. In 2019, China's electronic circuit copper foil production capacity increased by 33500 tons to 335000 tons compared to 2018. It is expected that China's electronic circuit copper foil production capacity will increase by 44000 tons in 2020, reaching 379000 tons.
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