Hefei Preferred Conductive Copper Foil Manufacturer
Calendered copper foil is a product made by repeatedly rolling and annealing high-precision copper strip (usually less than 150 microns in thickness) based on the principle of plastic processing (usually 4-100 microns in thickness and<800 mm in width). Its ductility, bending resistance and conductivity are better than those of electrolytic copper foil, and the copper purity is also higher than that of electrolytic copper foil.
Hefei Preferred Conductive Copper Foil Manufacturer
In order to avoid the copper oxide powder falling off and moving to the substrate, the surface treatment method has also been constantly improved. For example, TW copper foil is coated with a thin layer of zinc on the roughened surface of the copper foil, and the surface is gray; TC type copper foil is coated with a thin layer of copper zinc alloy on the roughened surface of the copper foil. At this time, the surface of the copper foil is golden yellow. After special treatment, the thermal discoloration resistance, oxidation resistance and cyanide resistance of copper foil in PCB manufacturing are improved accordingly.
Hefei Preferred Conductive Copper Foil Manufacturer
Calendered copper foil products have good ductility, flexibility, low roughness and high folding resistance, and have become the basic materials of flexible printed circuit boards, mainly used in flexible circuit boards and high-frequency circuit boards.
Hefei Preferred Conductive Copper Foil Manufacturer
Galvanizing barrier layer: After the rough surface is galvanized, a barrier layer is formed to improve the oxidation resistance of the copper foil in natural air. After galvanizing, the appearance will look gray. After a period of storage, the gray will turn into copper yellow. The more zinc is plated, the more yellow the copper foil will be.
Hefei Preferred Conductive Copper Foil Manufacturer
Copper foil can be divided into many kinds according to different classifications. According to the thickness, it can be divided into: thickness (more than 70 μ m) Regular thickness copper foil (more than 18 μ M but less than 70 μ m) Thin copper foil (more than 12 μ M but less than 18 μ m) Ultra thin copper foil (less than 12 μ m) Etc.
