Aviation PCB design and layout

Aviation PCB design and layout

Aerospace PCB manufacturing requires materials that can withstand large amounts of vibration, extreme temperatures, and other harsh conditions. Certain aviation PCBs even need to be able to operate in space and must be very durable. Plates made of lightweight materials such as aluminum can also be used in aerospace. Anodized aluminum can be used to improve oxidation resistance.

Printed Aviation Circuit Board

For beginners, their design must be more powerful, which requires specific layout and design techniques. Making circuit boards for airplanes is a difficult and time-consuming task. Pay special attention to the thermal management of the PCB, while considering the special design and layout techniques of high-frequency RF components. Therefore, in order to manufacture printed circuit boards for aerospace equipment, basic design and layout must be considered to make them more superior.

This means that the designer must define the correct board material, specify precise drilling diagrams, keep neat assembly precautions, keep stacking recommendations for layouts, add extra cushions for mechanical dimensions and holes, and use the correct termination method And perform a pre-layout simulation. The designer of the aircraft circuit board must also verify the impedance calculation, shield the signal, separate the ground plane and the power supply, and then maintain the correct aspect ratio.

Reasons for special PCB design and layout

One of the biggest challenges that the circuit boards on the space shuttle will face is radiation. Regardless of the ion type or the radio frequency type, radiation will destroy the circuit board by introducing electromagnetic interference (EMI), thereby disturbing the signal quality, changing the impedance and generating crosstalk on the trace. Therefore, your design should be optimized for power integrity, incorporating special considerations for signal integrity, and ensuring that only high-performance components are used. To facilitate this process, you should adopt a risk analysis that meets the following conditions: AS9100 includes monitoring and traceability of the supply chain, and appropriate additional components, such as shielding, are added to the assembly process.

Avoiding the influence of circuit board vibration or mechanical stress is to choose a good material. If your circuit board is flexible or rigid-flexible, you need to ensure that your PCB layout has a flat component placement position or require additional supports to help assemble to ensure the formation of good solder joints and firmly fixed components.

PCBs have different designs, shapes and sizes. Printed circuit boards used in aircraft have more complex designs that have been invented to meet the ever-increasing capabilities of aircraft. Therefore, it is not easy to design a PCB for aviation.