What are PCB lines, solder mask and silk screen

PCB circuit: First use film to cover the copper base material. The transparent area represents the circuit. The black covered area will be etched away, then exposed, and then the required circuits will be retained through an acidic process or an alkaline process. , the unnecessary parts are etched away to obtain the desired circuits and graphics;

Solder mask: The principle is similar to that of circuits, except that the exposure object is photosensitive ink, and the exposure energy is much stronger than the circuit exposure energy. When opening the window, you need to pass Na2CO3 solution (1 concentration);

Silk screen: This is the step before the circuit board quality inspection (E-Test, FQA, FQC), which is to print on the produced circuit board. Some specific marks, names, symbols, production dates, company LOGO, etc. are generally used; 120T net is generally used, and solar white character ink is commonly used.

If you have any questions, you can check Baidu or ask me. I have worked at Red Board (Jiangxi) Co., Ltd. for nearly three years.