it can not be continuously found that the boot phenomenon, after maintenance, the cause of the fault has a certain common, basically is the bottom of the power board between the solder joint sticky dirt, resulting in circuit leakage caused by fault.
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.
At present, for PCB curing, the most suitable use or UV light source, because UV light source has the characteristics of other mercury lamps do not have, just take the light source, UV light source is a cold light source, the curing principle is that the
to see what is the surface treatment process, we commonly have: spray lead tin (hot air leveling), OSP(environmental protection board), spray pure tin, tin, silver, gold and so on, of course, the surface process is different, the price will be different.
Frame line as the basis of PCB circuit board contour processing, cutting processing can only be processed straight shape, special-shaped local available punch and milling machine processing.
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
PCB circuit board and FPC flexible circuit board hot pressing machine heating methods now mainly have steam, superhot water, hot oil three methods.
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
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
PCB (English Printed Circuie Board printed circuit board is short for) with nickel plating as the substrate coating of precious metals and base metals, for some single-sided printed boards, also commonly used as the surface layer.
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