PCB Technical - Shenzhen pcb manufacturer: Analysis of the precautions for pcb solder mask ink

Shenzhen PCB manufacturer: Analysis of the precautions for PCB solder mask ink

Shenzhen PCB manufacturers: In the process of manufacturing printed circuit boards, most manufacturers will use inks, such as solder mask, characters, circuit inks, etc. The circuit ink is a barrier layer to prevent circuit corrosion, and the solder mask ink is a kind of The ink used in the welding process is used to protect the circuit after the circuit is completed. It is convenient for welding various components and can play the role of insulation and oxidation prevention.

The most common PCB solder mask inks in the factory are also divided into green, blue, black, yellow, red, etc. in color. The function is to avoid short circuits after soldering during use, and also extend the life of the PCB; To a large extent, it solves the pain points of short circuit caused by irregular welding of PCBs shipped to customers by manufacturers. However, in the process of PCB processing and production, the following major problems often occur. The following editor will analyze them one by one.

1. The PCB printing ink is not clean before processing

The treatment before the PCB printing ink is not in accordance with the specifications. If the PCB surface is stained, dust and other impurities, and some areas are oxidized, it will cause the phenomenon of shedding. At this time, it is necessary to re-process the printing ink in place, and the circuit board must be Clean up stains, impurities or oxide layers on the surface.

2. Uneven ink coverage

This phenomenon is caused by insufficient ink mixing time or mixing errors, followed by oil or water stains on the board surface, poor scratch film material, and unclean screen cleaning.

3. There is ink shedding

Usually, the quality of the ink or the expiration of the ink will cause the ink to fall off the circuit board. Therefore, as an ink supplier, you must strictly control every process to ensure the factory standards of the ink.

The above are some of the problems of PCB solder mask inks mentioned by the editor of the PCB factory. I hope I can help you. ipcb is a high-precision and high-quality PCB manufacturer, such as: isola 370hr PCB, high-frequency PCB, high-speed PCB, Ic substrate, ic test board, impedance PCB, HDI PCB, Rigid-Flex PCB, buried blind via PCB, advanced PCB, microwave PCB, telfon PCB and other ipcb are good at PCB manufacturing. ipcb PCB has always insisted on using superb technical force, sophisticated production equipment, perfect testing methods, higher product quality than industry standards, and warm and thoughtful service, which has won praise and welcome from global merchants and users.