PCB Impedance Control
As a China Printed Circuit Board manufacturer,Especially for quick switching parts with signal rise times of 1 to 2ns, the signal integrity must be guaranteed through good impedance
characteristics in the conductor trace connections.
The design of layer buildups and layouts can ensure tolerances of from 5% to 10% for currently common multilayers. Multi PCB checks customer tolerance specifications for manufacturability before production begins.
A calculation model is selected corresponding to the layer buildup, the circuit board layout, and the impedances specified by the customer. The result may indicate necessary modifications to the layer buildup, as well as necessary adjustments in the corresponding conductor trace geometries.
The impedance of circuit boards
- Spacing of signal and potential layers
- Conductor trace geometry
- Conductor trace height (= copper thickness)
- Dielectric constant εr
The compliance of the impedance values is then verified using an individual test coupon for each panel produced. Each respective Z0 value is measured and documented for each layer.
Your advantage with Multilayer PCB is impedance control down to 5% tolerance