Biocide method in the process of preparation printed circuit board

Abstract

The invention relates to a a killing method during manufacturing process of printed circuit board, which belongs to the field of printed circuit board manufacture, Said method comprises adding biocides into the water online system during the printed circuit board manufacturing process. The invention has the advantages of simpleness, low cost, and high pass rate for printed circuit boards.

Description

technical field [0001] The invention belongs to the field of printed circuit board manufacturing, and in particular relates to a method for killing microorganisms during the wet process of printed circuit boards. Background technique [0002] In the production process of printed circuit boards (PCBs), the wet process is the key process of producing printed circuit boards (PCBs). Contact with liquid is an inevitable link in the production process, and the water system will breed in the wet process. Microorganisms, after multiplying in large numbers, will pollute the water body and produce a large amount of mucus. When the mucus or the microorganisms themselves adhere to the printed circuit board, they will produce copper slag, copper wire, open circuit gap, desoldering, short circuit, and open circuit in the process of electroplating and other processes. And other phenomena, resulting in a large number of unqualified printed circuit boards. [0003] At present, the method to...

AI Technical Summary

Problems solved by technology

[0002] In the production process of printed circuit boards (PCBs), the wet process is the key process of producing printed circuit boards (PCBs). Contact with liquid is an inevitable link in the production process, and the water system will breed in the wet process. Microorganisms, after multiplying in large numbers, will pollute the water body and produce a large amount of mucus. When the mucus or the microorganisms themselves adhere to the printed circuit board, they will produce copper slag, copper wire, open circuit gap, desoldering, short circuit, and open circuit in the process of electroplating and other processes. and other phenomena, resulting in a large number of printed circuit boards being unqualified

[0003] At present, the method to solve microorganisms in the water washing system of the wet process of printed circuit boards (PCB) is mainly to use ultraviolet light to kill bacteria, that is, to install ultraviolet lamps on the water washing tank, which can alleviate the adverse conditions caused by microorganisms, but due to the range of contact and Intensity and the flow rate of water etc. are all reasons that cannot be effectively killed, so there are more defective products caused by microorganisms; another method is the method of adding medicine to sterilize [Chinese patent ZL200410012799.2, patentee Wuhan Zhongxin Chemical Co., Ltd. ], this patent is indeed effective in solving certain types of bacteria, but it cannot completely kill the microorganisms in the system, it can only solve part of the problem, and cannot completely eliminate copper slag, copper wire, open circuit gap, desoldering, and short circuit caused by microorganisms , open circuit and other issues