Common errors in impedance control PCB boards-深圳市海博精密电路有限公司

Incorrect layer information: Sometimes designers mistakenly add layer information to PCB impedance control. When you use PCB impedance control to make dense circuit boards, this is a major mistake. Therefore, please ensure that the PCB impedance control values, reference grounding, and control impedance layer information are correctly filled in the stacking and manufacturing documents. DFM engineers can easily ensure that they understand the correct information about the artwork.

Incompatible wiring width: Sometimes, many customers design multiple control impedance wiring, but design multiple wiring in the same layer, which does not meet the requirements for designing control impedance wiring in the same layer. Then, due to certain reasons, such as the control impedance ohm not having a precisely defined value, the control impedance cannot function properly.

Control impedance tolerance: Most PCB manufacturers use a 10% tolerance to control impedance. Sometimes customers allocate lower tolerances to achieve impedance control. But this will only affect control

Impedance on closely spaced PCBs and high-density circuit boards. If this type of

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