Category Archives: Technical Knowledge

Wet Process and PCB Surface Treatment Part 1

Wet Process and PCB Surface Treatment. 1. Abrasives Brushes Various materials used for pre-cleaning the board surface and brushing the copper surface, such as polymer non-woven fabrics, or non-woven fabrics mixed with emery or various types of sand-free materials, and pumice powder (Pumice Slurry) are all called abrasives. However, the powder of this kind of […]

Printed Circuit Board Shape Processing Technology

1. The processing method of the printed board shape: (1) Milling the shape. To use the CNC milling machine to process the shape, it is necessary to provide the milling shape data and the corresponding pipe hole files. These data are all provided by the programmer. Since the spacing between the printed boards cannot be very […]

Requirements for PCBA Transportation and Storage Conditions

In order to ensure the quality of PCBA, the transportation and storage of PCBA should also strictly abide by various operating specifications. So, what are the requirements for PCBA transportation and storage conditions? 1. Anti-static Do a good job of anti-static measures for PCBA, use suitable containers, tools, etc. 2. Use suitable means of transport […]

How to Control the PCBA Manufacturing Process

The process of PCBA contract labor and material processing involves a series of processes such as PCB circuit board manufacturing, component procurement and inspection, patch processing, plug-in processing, program firing, testing, aging, etc. The supply and manufacturing chain is relatively long. Defects will cause a large number of bad PCBA boards, with serious consequences. Therefore, […]

PCB Horizontal Electroplating Process for High-Precision Circuit Boards (3)

According to the characteristics of horizontal electroplating, it is an electroplating method in which the way of placing the printed circuit board is changed from vertical to parallel plating liquid level. At this time, the printed circuit board is the cathode, and some horizontal electroplating systems use conductive clips and conductive rollers for the supply of […]

PCB Horizontal Electroplating Process for High-Precision Circuit Boards (1)

With the rapid development of microelectronics technology, the manufacturing of printed circuit boards is developing in the direction of multi-layer, lamination, functionalization, and integration, which makes the manufacturing technology of printed circuit boards more difficult, and the conventional vertical electroplating process cannot meet the requirements of high technical requirements for high-quality, high-reliability interconnect holes that resulted […]

Comparison of Dry Film and Wet Film for PCB Processing

The dry film is easy to operate, especially using an automatic film laminating machine, which can be mass-produced. The wet film is cheap, but it cannot be used on automatic lines. The wet film is theoretically good for thin lines, but the wet film also has many other problems. In general, the dry film is […]

Overview of Final Coatings on PCB Surfaces

The final coating process for PCB manufacturing has undergone important changes in recent years. These changes are the result of the continued need to overcome the limitations of HASL (hot air solder leveling) and the growing number of HASL alternatives. The final coating is used to protect the surface of the circuit copper foil. Copper (Cu) is […]

PCB Short Circuit Inspection Method

1. If it is manual welding, it is necessary to develop a good habit. First, visually check the PCB board before welding, and use a multimeter to check whether the key circuits (especially the power supply and ground) are short-circuited. Use a multimeter to test whether the power supply and the ground are short-circuited. In addition, do […]