The process of transforming a printed circuit board from a blank panel to revealing the circuit patterns is a complex series of physical and chemical reactions. This article will analyze the final step—etching. Currently, the typical processing method for printed circuit boards (PCBs) employs the “pattern plating method”. This means that a lead-tin resist layer … Read more
In the coal chemical industry, processes such as coal supply, air separation, gasification, synthesis, and desulfurization are all contained within individual workshops. For example, a typical coking plant generally includes a coal preparation workshop, coking workshop, recovery workshop, coke oven gas and tar processing workshop, benzene processing workshop, desulfurization workshop, and wastewater treatment workshop. Coking … Read more
Ammonia (NH₃) is a common industrial chemical widely used in fertilizer manufacturing, refrigeration systems, and other fields. Due to its strong corrosiveness and toxicity, leaks can pose a serious threat to the environment and personnel safety. Therefore, timely detection of leaks and taking measures is particularly important in areas where ammonia leaks may occur. This … Read more