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.
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.
PCB pressing process control. After PCB has been pressed and baked, the Tg values of the samples can be measured twice by the same method and the same machine.
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.
in multilayer PCB design, components should be placed in groups to prevent inter-group interference; The location of high-speed circuits should be arranged properly so as not to interfere with other circuits through electric or magnetic coupling; The grou
Verification of machine Settings (components, machine parameters, etc.) is a positive approach. AOI can be used effectively for the inspection of the first board. Some hardware and software vendors also provide feeder Settings confirmation software.
dielectric layer material. The material of dielectric layer has influence on the hole filling. Compared with glass fiber reinforced materials, non-glass reinforced materials are easier to fill holes.
The output value of the global electroplating PCB industry accounts for the proportion of the total output value of the electronic components industry growing rapidly.
Another 6-layer board layout is signal, ground, signal, power, ground, signal, which enables the environment required for advanced signal integrity design. The signal layer is adjacent to the grounding layer, and the power layer is paired with the groundi
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
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