Shanwei Preferred Electronic Copper Foil Manufacturer
Foil making material requirements: the thinner the thickness is, the higher the quality grade is, and the lower the impurity content in the electrolyte is required. In order to ensure the quality, the purity of copper must be greater than 99.9%.
Shanwei Preferred Electronic Copper Foil Manufacturer
Surface passivation: chromate (or chromate and zinc salt) solution is used for surface passivation (i.e. anti oxidation treatment) after the barrier layer is plated to form a complex film with chromium (or chromium zinc) as the main body on the surface, so that the copper foil will not be oxidized and discolored due to direct contact with air, and at the same time, the heat resistance of the copper foil is improved (higher zinc content, better heat resistance), The storage period of copper foil can reach 3 months.
Shanwei Preferred Electronic Copper Foil Manufacturer
Copper clad laminate is the base plate for manufacturing PCB, which is an important type with large amount of materials. The manufacturing process of copper clad laminate is to impregnate glass fiber cloth, glass fiber mat, paper and other reinforcement materials with epoxy resin, phenolic resin and other adhesives, dry them to the first stage at appropriate temperature, obtain pre impregnating materials (referred to as impregnating materials), and then stack them according to process requirements and copper foil, The required copper clad laminate is obtained by heating and pressurizing on the laminator.
Shanwei Preferred Electronic Copper Foil Manufacturer
Definition of electrolytic copper foil: it is formed by depositing copper ions in electrolyte on the round cathode roller of smooth rotating stainless steel plate (or titanium plate). The surface close to the cathode roller is called smooth surface, and the other surface is called rough surface.
