Category Archives: Uncategorized

Pcb3w design principle In PCB design, in order to reduce the crosstalk between lines, the line spacing should be large enough. When the line center spacing is not less than 3 times the line width, most electric fields can be kept from interfering with each other, which is the 3W rule. The 3W principle means […]

When designing PCB pads in PCB design, it is necessary to design them in strict accordance with relevant requirements and standards. Because the design of PCB pads is very important in SMT chip processing, which will directly affect the solderability, stability and heat transfer of components and the quality of chip processing, what is the […]

For some customers, the design of PCB is seriously nonstandard, and they simply can’t tell whether it’s pad or via. Sometimes conductive holes are treated with pad, and sometimes key holes are treated with via. The design confusion leads to more errors. According to incomplete statistics, the problems caused by nonstandard design account for more […]

Gas reflow welding is also called condensation welding. VPS refers to SMT SMD welding equipment that uses the latent heat released by the vaporization of fluorocarbon liquid as a heat medium to provide heat for welding. First-phase reflow thick film circuit. 1. The principle of gas-phase reflow soldering is that the liquid containing fluorocarbon can […]

In fact, the micro-assembly technology of SMT proofing and small batch processing is a comprehensive technology of assembling various micro-components of electronic circuits on high-density multilayer interconnected substrates by micro-welding and SMT chip processing to form micro-electronic products. I. Multi-chip module The multi-chip component in SMT package is a kind of high-tech electronic product derived […]

At the beginning, the manufacturing process of steel mesh in Changsha SMT small batch processing factory is mainly to make plates by photography, and then chemical etching is used. In addition, laser cutting or electroforming is used to make plates for steel mesh in Changsha SMT processing. Changsha smt proofing briefly introduces the advantages and […]

SMT material throwing is usually called material throwing, that is to say, after the suction nozzle of the mounter picks up the material in the material tray, the material is thrown out in the process of moving to the PCB mounting position. Generally, the reason for this problem is that the suction nozzle pressure is […]

1. What are the processing steps of SMT SMD Mark? 1. the handling method of Mark, whether Mark is needed or not, and the side of the template, etc. 2. Which side of the template the Mark graphic is placed on depends on the specific structure of the printing press (the position of the camera). […]

I. Electrical test In the production process of PCB, it is inevitable that electrical defects such as short circuit, open circuit and leakage will be caused by external factors. In addition, PCB continues to evolve towards high density, fine spacing and multi-level. If the defective boards are not screened out in time and allowed to […]

What materials should be given to SMT small batch SMD processing factory by OEM? In SMT processing, especially OEM, if there is insufficient processing materials provided by customers to electronic processing factory, it will waste processing time, thus affecting the delivery time. What information do you need to provide to SMT small batch SMD processing […]