The RF part is grounded by multi-point grounding. The copper gap of RF link is usually 30mil to 40mil. Connect ground holes on both sides with the same spacing as possible. Make a grounding hole as close as possible to the grounding pad of the ground capa
The outermost wire or device of the PCB circuit board should be no less than 2mm away from the edge of the circuit board, which is conducive to the fixing of the PCB board and prevent the change of impedance value.
The less interlayer alternations between pins of high-speed circuit devices, the better. The so-called "the less interlayer alternations of leads, the better" means that the fewer holes used in the connection of components, the better.
Because the soft and hard combined board is the combination of FPC and PCB, the production of soft and hard combined board should be equipped with both FPC production equipment and PCB production equipment.
In the process of PCB high-speed signal circuit design and wiring, engineers need to shorten the lead between the pins of high-speed circuit devices as much as possible.
ircuit board defect detection includes two parts: solder spot defect detection and component detection. The traditional detection adopts manual detection method, which is easy to miss detection, slow detection speed, long detection time and high cost, and
The setting and connection of input and output circuits are very important for the whole printed FPC circuit board, and whether it is reasonable or not will directly affect the size of electromagnetic interference.
The number of holes should be reduced as far as possible. It should be known that a hole in the circuit board will bring about 10pF capacitance effect, which is a great interference in high-frequency circuits.
Gold is many times longer so everyone is happy to use it. Moreover, the cost of gold-plated PCB at the sampling stage is almost the same as that of lead-tin alloy plate.
PCB single panel, CB double panel, PCB 4-layer board, PCB 6-layer board, multilayer circuit board, audio PCB board, IC card board, mobile phone camera board, PCB backlight board, LED display circuit board, high frequency board, FR4 lamp, strip board
Although baking is the best way to improve the burst board, baking not only wastes time, but also wastes equipment and manpower, and the Tg value will decrease after baking PCB is also a problem.
Place pcb components at any Angle:Double-click the component and there is a parameter called Rotation. It's the Angle of rotation. Choose the Angle you want.
Telegram