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Controlled Impedance Requirements

Impedance, generally measured in Ohms is a characteristic of the circuit that has to be taken care of during design of the pcb. Resistance and reactance of an electrical circuit have a major impact on functionality, as certain processes must be completed before others to ensure proper operation. This chain of command disrupts a system and leads to a complete failure when these actions aren’t performed as planned. Printed circuit boards with impedance requirements will nullify the changes in voltage occurring and lead to an appliance or gadget that operates as expected.
The use of differential impedance PCB components provide the control needed for a range of products. We can recommend software programs designed to detect resistance and reactance flow, providing you with the specs you require. MCL will use this data to create custom PCBs. The resulting circuitry is cost effective and provides heightened reliability.

The pcb design factor’s affecting impedance are: Trace width, copper thickness, dielectric thickness, dielectric constant.

When Is Impedance Most Important?

Operations controlled by impedance printed circuit boards perform faster processing and use less energy. Covering impedance control in PCB design plans helps products perform better for longer periods of time, improving value and reliability.
Controlled impedance is essential during transitions from a lower Ohm to higher Ohm environment where impedance is present. These kinds of transitions can lead to energy reflection in the form of powerful pulses capable of disrupting energy flow. This issue is as critical for those manufacturing high-powered digital devices as it is in RF applications.
At MCL, we also manage electromagnetic interference (ELI) through the use of specially designed PCBs with impedance requirements built in during manufacturing. A pulse of reflection energy disrupts circuits. That distortion often bleeds over to neighboring components. It interrupts energy flow and product operation fails.

Here’s How We Do It

As a circuit is created, the elements in place impact impedance and the schedule on which a circuit completes its functions. The flow of energy is changed by modifying the physical characteristics of flexible circuit boards. The thickness of the copper used and proximity of circuits to one another lower or increase impedance, which in turn will impact the timing – and integrity – of critical processes.
Provide us with the specs you need, and MCL will create the most robust circuitry available with all the benefits of flexible applications using our state of the art systems. PCBs are cheaper, easier to use, allow for greater amounts of circuits to be utilized in small spaces. Take advantage of these benefits while retaining the ability to fine-tune your processing times. Get in touch with MCL today to discuss our controlled impedance capabilities.

PCB Glossary

  • Dry-Film Soldermask

    Coating material (dry-film resist) applied to the printed circuit board via a lamination process to protect the board from solder or plating.