The circuit board inside the line is mainly pure copper, that is, bare copper plate. Some people think that the gold color is copper, which is the protective layer on the copper.
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Transmission delays on ground and interconnect lines in high-speed systems are also factors to be considered in system design.
PCB board is printed with solder paste, installed with electronic components, and then fixed by reflow welding.
Fanyi PCB design Company to military quality PCB design requirement PCB design can not be arbitrary, there are certain rules. Fanyi circuit military quality PCB design has the following requirements
Another technique is to lay a ground wire between the two lines. The ground wire is low impedance, and adding such another wire will weaken the electric field that causes the interference!
Only when the digital signal is routed on top of the analog portion of the circuit board or the analog signal is routed on top of the digital portion of the circuit board will the interference of the digital signal to the analog signal occur.
The heat generated during the operation of electronic equipment makes the internal temperature of the equipment rise rapidly. If the heat is not distributed in time, the device will fail due to overheating.
The milling technology of NC circuit board milling machine includes the selection of cutting direction, compensation method, positioning method, frame structure, the next cutter point, which is an important aspect to ensure the milling precision.
PCB as the support body of electronic components, its surface needs to be welded components, it requires a part of the copper layer exposed for welding. Hence the need to brush solder resistance paint.
When the copper wire on PCB board is soaked in etching liquid for a long time, it will cause some fine line backing zinc layer to be completely reacted off and separated from the substrate, that is, the copper wire falls off.
The complexity of PCB production process and process maintenance, especially in chemical wet treatment, make it difficult to prevent the surface foaming defects.
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