We all know that there are many procedures for making HDI PCB from the planned feeding to the final step. One of the processes is called browning. Some people may ask what is the role of browning?
The advantages of heavy copper PCB make it the top priority for the development of high-power circuits. The heavy copper concentration can handle high power and high heat, which is why high-power circuits have been developed using this technology. Such circuits cannot be developed with low-copper concentration PCBs because they cannot withstand the huge thermal stresses caused by high currents and flowing currents.
When designing a circuit, factors such as thermal stress are very important, and engineers should eliminate thermal stress as much as possible. Over time, PCB manufacturing processes have continued to evolve, and various PCB technologies have been invented, such as aluminum PCBs, which can handle thermal stress. It is in the interests of heavy copper PCB designers to minimize the power budget while maintaining the circuit. Performance and environmentally friendly design with heat dissipation performance.
Just like the standard PCB manufacturing method, heavy copper PCB manufacturing requires more delicate processing.
Heavy copper PCBs are manufactured with 4 ounces or more of copper on each layer. 4 ounce copper PCBs are most commonly used in commercial products. The concentration of copper can be as high as 200 ounces per square foot.
1. It can reduce the cost of HDI PCB: When the density of PCB increases to more than eight-layer board, it is manufactured with HDI, and its cost will be lower than that of the traditional complex pressing process.
