With the development of 5G era, the development of PCB (Printed Circuit Board) industry must also grow. As the core support carrier of electronic components, PCB needs a lot of raw materials, including various chemical materials such as sodium persulfate. However, although many people know that the PCB industry needs sodium persulfate, they do not know how to use sodium persulfate. This is very common, because it may involve some technical problems. Today, wants to talk about the general application of sodium persulfate in PCB industry -- micro etching!
The circuit board is divided into single layer and multilayer, and multilayer circuit board is divided into inner layer and outer layer. For example, mobile phones, computer motherboards, etc., require multi-layer circuit boards to reduce the size. The inner layer circuit is in the middle of the circuit board, so the inner layer circuit does not require appearance, but emphasizes function.
Therefore, the micro etching of the inner layer circuit emphasizes to make the surface as rough as possible, so that the adhesion of the two layers of circuit boards is better when pressing. Generally, sodium persulfate is used for micro etching, which can not only clean the copper surface of roughened circuit, but also ensure the adhesion between pattern electroplating copper and primary copper.
When sodium persulfate is used for micro etching, the roughening rate is more stable and uniform, and the water washing property is better than that of other materials.
The use of sodium persulfate as a micro etchant in PCB production is not obviously different, so some businessmen have the opportunity to take advantage of the fact that the case of passing off ammonium persulfate as sodium persulfate is not uncommon in the Pearl River Delta region, especially in the surrounding areas.
The counterfeit sodium persulfate not only brings troubles to the wastewater treatment of circuit board enterprises (ammonia nitrogen is easy to exceed the standard), but also brings risks to the storage (storing ammonium persulfate under the conditions of sodium persulfate may lead to a fire). It also brings economic losses to our enterprises producing sodium persulfate. The price of sodium persulfate is low for a long time because it is counterfeited.
Therefore, for the purchase of sodium persulfate, you should pay more attention to check the acceptance, and not be fooled by the low price. More relevant content will come to our website http://www.mybuildingdesignz.com Leave a message for consultation!