Shenzhen Preferred Copper Foil Manufacturer for Heat Dissipation
Copper foil is an indispensable raw material for making printed circuit board (PCB), copper clad plate (CCL) and lithium-ion battery. For industrial use, it can be divided into calendered copper foil and two categories according to its manufacturing process. Electrolytic copper foil is made by electrolysis of copper based on electrochemical principle. The internal structure of raw foil is vertical acicular crystal structure, and its production cost is relatively low.
Shenzhen Preferred Copper Foil Manufacturer for Heat Dissipation
The electrolyte contains oil, paint, grease, sediment and other contaminants attached to the surface of copper foil. After being squeezed by the squeezing (water) roller, the contaminants are squeezed flat, some contaminants attach to it, and some contaminants attach to the guide roller. Because the dirt is squeezed up during the operation, the dirt has a head and a tail, and has a direction.
Shenzhen Preferred Copper Foil Manufacturer for Heat Dissipation
During the production of copper foil, tiny foreign matters are adhered on the surface to form spots with different colors from the surface, which are called stains. Judgment method: use macroscopic inspection to judge whether it is a waste product, a secondary product or a finished product according to the number and area of stains and the impact on product quality.
Shenzhen Preferred Copper Foil Manufacturer for Heat Dissipation
Silane coupling agent treatment: after anti oxidation treatment, the surface is sprayed with silane, which can improve the oxidation resistance at room temperature on the one hand; On the other hand, in high temperature pressing plate, silane can better combine copper foil and resin substrate through coupling, and improve peel strength. Post treatment process - drying. In order to prevent the harm of residual moisture, it must be dried at not less than 100 ℃ later, and the drying temperature cannot be too high.
Shenzhen Preferred Copper Foil Manufacturer for Heat Dissipation
Speaking saliva splashes on the surface, and stains will appear when saliva is rolled up. A short time is a dark point, and a long time is a dark point. The size of the point is related to the saliva splashed on the copper foil.
