PCB Blogger-China PCB Factory,HOYOGO

　　For PCB boards, common  PCB   production  colors are red, yellow, green, blue, and black colors. But green solder mask are most commonly used. So people may have this question: Why are green mostly used ? This depends on the PCB designer needs to make. And, since there are so many colors, why are most of PCBs still green solder mask? 　　As per  Professional PCB manufacturer  said:  Green solder mask is the most widely used and the longest in history. And it is also the cheapest in the current market. Usually, during the process of  PCB production , there are several processes need to be done in the yellow light room, while the effect of green solder mask in the yellow light room is better than other colors. When soldering components in SMT, the  PCB production  need pass many process. These processes require optical positioning and calibration, where the green background color is better for instrument identification. Therefore, most PCB manufacturers choose green solder mas

We need to know that during the  PCB assembly  production, solder paste and flux usually produce residual substances. The residue contains organic acids and decomposable ions. Among them, organic acids have corrosive effect, and the residual ions on the pads can cause short circuits. Moreover, these residues are dirty on the  assembled PCB  and do not meet the customer’s requirements for product cleanliness. Therefore, it is very necessary to clean the  assembled PCB . Assembled PCB  should be cleaned as soon as possible after soldering. Since the flux residue gradually hardens over time and forms corrosives such as metal halides, it is necessary to thoroughly remove residual flux, solder and other contaminants from the PCB. Cleaning is the dissolution removal process of a solder residue. Its purpose is to extend the life of the product in essence by ensuring good surface resistance and preventing leakage. What should be paid attention to in PCBA cleaning? When cleaning: Prevent h