Gold plated copper foil for 5G electromagnetic wave receiver used in 5G communication

5G is a global communication technology standard. The publisher of 5G technology standards is the International Telecommunication Union. ITU is a subsidiary agency of the United Nations, specifically responsible for matters related to information and communication technology, including the development of global telecommunications standards and the promotion of global telecommunications development. In fact, the official name for 5G is IMT-2020. This name was officially determined by ITU at the Radiocommunication Conference held in Geneva, Switzerland in October 2015.
Gold is an excellent corrosion-resistant material, characterized by high chemical stability, resistance to oxidation, good weldability, wear resistance, good conductivity, and low contact resistance. The gold coating is highly resistant to oxidation and has good wetting properties with solder.

1. Copper foil is a negative electrolytic material, similar to tin foil, which is a very thin copper sheet.

2. Copper foil is made by adding a certain proportion of other metals to copper, and there are generally two types of copper foil: 90 foil and 88 foil. It is the most widely used decorative material.
Copper foil accounts for about 13% of the total weight of lithium batteries and is a key material that affects the quality and energy density of the battery.Lithium ion copper foilThe thinner it is, the greater the effect on improving the energy density of the battery, and ultra-thin copper foil has become the mainstream for shipment; The performance of copper foil can also affect the capacity, internal resistance, cycle life, and safety of batteries. At the same time, lithium copper foil poses safety hazards such as reduced capacity and thermal runaway of the battery. The PET copper foil uses 4.5-micron PET as the substrate, covered with copper coatings of one micron on each side, with an actual thickness of 6.5 microns. This not only solves the problem of thermal runaway of the battery, but also improves the capacity and cycle life of the battery, resulting in better product performance; At the same time, traditional copper foil is difficult to reduce costs, and PET copper foil has less copper usage and lighter weight. At the same time, PET substrate prices are lower, so its unit cost is relatively lower, becoming the mainstream trend of future copper foil development.