Discussing about clean production option of filtration system in wet processes of PCB manufacturing Fu Yi Chen Xianren Pan Songlin (Zhuhai Founder Tech. Multilayer PCB Co., Ltd, F7, Guangdong, Zhuhai 519175) Abstract Filtration system is one of the main functions of the wet process in printed circuit board manufacturing, which commonly needs to change filter at fixed period. The used traditional filter belongs to