Question

What do the outer copper thickness and inner copper thickness of PCB refer to?

Answer 1

The outer copper thickness and inner copper thickness of PCB refer to the thickness of the copper layer on the surface and inner layer of the circuit board.

The thickness of outer copper is typically used for circuit board routing and connections, and its selection depends on the application requirements and design needs of the circuit board. Generally speaking, the thickness of the outer copper layer is between 1-5oz (ounces), and the more common ones are 1oz, 2oz, 3oz and 4oz.

The greater the thickness of the outer copper layer, the stronger the load-bearing capacity of the circuit board, and the better the anti-interference performance and conductive performance will be. However, the increase in outer copper thickness also leads to increased costs and increased manufacturing difficulty.

The inner layer copper thickness is usually used for internal connections and signal transmission of circuit boards, and its selection also depends on the application requirements and design needs of the circuit board. The thickness of the inner copper layer is generally between 0.5-2oz, and the more common ones are 0.5oz, 1oz and 2oz.

When making PCBs, the choice of outer copper thickness should also take into account factors such as plating and etching. For example, if the outer base copper is 0.5oz, then the outer finished copper thickness is 1oz; if the outer base copper is 1oz, then the outer finished copper thickness is 1.5oz; if the outer base copper is 2oz, then the outer finished product Copper thickness is 2.5oz etc. The thickness of the inner copper layer needs to be determined taking into account the signal transmission requirements. For example, if the circuit board needs to transmit high-speed signals, a larger inner layer copper thickness should be selected.

In short, the outer copper thickness and inner copper thickness of the PCB are comprehensively considered based on the design requirements and cost factors of the circuit board. If necessary, it is recommended to consult professionals for more accurate information.

Answer 2

The outer copper thickness and inner copper thickness of PCB refer to the thickness of the copper layer on the surface and inner layer of the circuit board.

The thickness of outer copper is typically used for circuit board routing and connections, and its selection depends on the application requirements and design needs of the circuit board. Generally speaking, the thickness of the outer copper layer is between 1-5oz (ounces), and the more common ones are 1oz, 2oz, 3oz and 4oz. The greater the thickness of the outer copper layer, the stronger the load-bearing capacity of the circuit board, and the better the anti-interference performance and conductive performance will be. However, the increase in outer copper thickness also leads to increased costs and increased manufacturing difficulty.

The inner layer copper thickness is usually used for internal connections and signal transmission of circuit boards, and its selection also depends on the application requirements and design needs of the circuit board. The thickness of the inner copper layer is generally between 0.5-2oz, and the more common ones are 0.5oz, 1oz and 2oz.

Hope the above information is helpful to you.