The printing technology of PCB board characters is regarded as a kind of screen printing technology in multi-layer circuit board manufacturers. The principle of printing the PCB circuit board characters is: using the well-designed graphic screen in advance, under the pressure, the text ink is forced to pass through the mesh holes in the screen. This allows characters to be printed on the surface of the board. In the rest of the screen version is already dead and blocked. In the place where there is no ink, it is white, and the place where the ink is formed on the copper foil, characters, and pattern marks.

The characters and graphics printed by the multi-layer circuit board manufacturers on the PCB circuit board are usually used to mark the information of some PCB circuit boards; for example, the date and time of production of the PCB circuit board, the manufacturer, and the PCB circuit board. The configuration parameters, the location of the welding, etc. The advantage of the operation is that it can be used for identification, product inspection, and subsequent identification during SMT soldering. With the rapid development of electronic products, electronic products are becoming more miniaturized, lighter, and more integrated. The road, coupled with the rapid development of packaging technology, the soldering pads have become smaller and smaller, making the requirements for text printing on PCB boards more stringent.