We often say that PCB nickel plating has smooth nickel and dumb nickel (also known as low-stress nickel or semi-bright nickel), usually requires uniform and fine coating, low porosity, low stress, good ductility characteristics.
Practice has proved that even if the circuit schematic design is correct and the printed circuit board is improperly designed, the reliability of electronic equipment will be adversely affected.
The image recognition technology is applied to the precise measurement of printed circuit boards. The test results show that the system has a high accuracy (0.6μm), which can meet the high precision measurement of printed circuit boards.
With the rise of the electronic industry, circuit board production and development has become a more and more important part of PCB proofing a circuit board is not simple, easy to say.
The impedance test template can automatically generate a custom impedance template that changes with time according to the circuit characteristics on PCB, as shown in Figure 5. In this way, the special PCB wiring can be accurately judged and detected, suc
At present, PCB board manufacturers generally adjust PCB prices according to different payment methods, ranging from 5%-10%, which also causes the difference in price.
The mechanical driving part is driven by the CAM spindle to drive the feeding mechanism, and the striking arm of the feeder is quickly found. The ratchet connected with it drives the component braid forward a distance through the connecting rod, and drive
In addition, the process can prevent hydrogen embrittlement, because the process does not form a closed space, which helps to prevent acidic materials during plating from being trapped inside the workpiece, thus preventing hydrogen elements from entering
The mechanical driving part is driven by the CAM spindle to drive the feeding mechanism, and the striking arm of the feeder is quickly found. The ratchet connected with it drives the component braid forward a distance through the connecting rod, and drive
The mechanical driving part is driven by the CAM spindle to drive the feeding mechanism, and the striking arm of the feeder is quickly found. The ratchet connected with it drives the component braid forward a distance through the connecting rod, and drive
In the power supply circuit, the positive electrode of the electrolytic capacitor is connected to the output terminal of the power supply when the positive voltage is output, and the negative electrode is grounded.
pcb circuit board has a variety of production processes, such as gold-plated plate and tin plate, the production of shape gong (milling) board and beer (punching) board, the use of silk screen line and dry film line, different production process costs are
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