The cost calculation of PCB industry is the most special and complex in all industries. From opening material, pressing plate, forming, to FQC, packaging, completion and storage, it is necessary to input the material cost, labor cost and manufacturing cos
At present, PCB board manufacturers generally adjust PCB prices according to different payment methods, with a range of 5%-10%, which also causes the difference in price.
PCB flux coating is too much, or there is no effect of wind knife, and too much steam is volatilized in the preheating section. If it is caused by this situation, according to the method described above, the wind knife installed or adjusted to the normal
Basically there will be no excess PCB flux dripping down in the preheating zone; It can not only reduce the risk of PCB flux fire, but also protect the heat pipe from erosion and extend the service life.
The same material produced by different pcb manufacturers varies due to its resin content. The dielectric constant decreases with the increase of frequency, so in practical application, the dielectric constant of materials should be determined according t
PCB circuit board manufacturers to PCB circuit board related design parameters detailed.
High Tg material: the so-called Tg value, now electronic products require the circuit board to be resistant to high temperature, at a certain temperature, the circuit board can not burn, can be softened, the softening temperature is called glass conversio
High-speed signal networks, such as clock signals, produce closed-loop results when multi-layer PCB lines are routed. Such closed-loop results will generate ring antennas and increase EMI radiation intensity.
It has been proved that the reliability of electronic equipment will be adversely affected even if the circuit diagram is designed correctly and the printed circuit board is not designed properly.
Flux spraying The PCB is carried by the X/Y manipulator through the flux nozzle, and the flux is sprayed on the PCB to be welded. Flux has a single nozzle spray, microporous spray, synchronous multi - point/graphic spray.
only light gas precipitation. Generally, the PH value of PCB nickel plating electrolyte is maintained between 3 and 4. The nickel plating solution with higher PH value has higher dispersion force and higher cathode current efficiency.
These are the high frequency PCB design tips for PCB interconnect. If you are familiar with these methods, you will understand that the coplanar microstrip design with copper cladding on the back is more economical and practical than the strip design.
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