1、 The materials used for PCB circuit boards are different

　　Taking ordinary double-sided boards as an example, the board materials generally include FR-4, CEM-3, etc. The board thickness ranges from 0.6mm to 3.0mm, and the copper thickness ranges from? Oz to 3 Oz are different. In terms of solder mask ink, there is also a certain price difference between ordinary thermosetting oil and photosensitive green oil.

　　2、 Different production processes are used for PCBs

　　Different production processes will result in different costs. Products such as gold-plated plates and spray tin plates, as well as gongs (milled) and beer (punched) plates used for shape production, and the use of silk screen and dry film circuits will result in different costs.

　　3、 The difficulty of PCB circuit boards themselves varies

　　Even if the materials are the same and the processes are the same, the difficulty of the PCB itself will result in different costs. If there are 1000 holes on both types of circuit boards, and one board has a hole diameter greater than 0.6mm and the other board has a hole diameter less than 0.6mm, different drilling costs will be formed; If the other two types of circuit boards are the same, but the line width and distance are different, one is greater than 0.2mm and the other is less than 0.2mm, it will also cause different production costs because the difficult board has a higher scrap rate, which will inevitably increase the cost.