Due to the easy oxidation of copper surface in general environment, PCB circuit board cannot be tinned, so protection will be provided on the tinned copper surface. The methods of protection include tin spraying, gold plating, silver plating, and organic welding machines, each with its own advantages and disadvantages, collectively referred to as surface treatment. Before the emergence of PCB circuit boards, the interconnection between electronic components relied on direct wire connections to form a complete circuit. Nowadays, circuit breadboards only exist as effective experimental tools, while printed PCB circuit boards have become an absolute dominant force in the electronics industry.


Usually, the color of PCB circuit boards is green or brown, which is the color of solder mask. It is an insulating protective layer that can protect copper wires and prevent parts from being welded to incorrect places. A layer of screen printing will also be printed on the solder mask layer. Hebei Cangzhou Lida Circuit Board Factory mainly produces single-sided circuit boards, circuit boards, aluminum based circuit boards, PCB circuit boards, circuit boards, LED circuit boards and multi-layer circuit boards, which are widely used in aerospace, national defense, communication, home appliances, environmental protection, medical and industrial control fields. In addition, the circuit board Flat noodles and corrosive liquid can be recycled, and the sample board can be copied according to the schematic design provided by the customer.