A dielectric material conducts minimal electricity, and provides an insulating layer between two conducting copper layers. The most common dielectric material is FR-4, but before selecting it for your board, you must carefully consider its properties.
Here is an overview of the most important properties to consider for any dielectric material:
1 Thermal properties
2 Electrical properties
3 Chemical properties
3.1 Effects of moisture absorption on dielectric constant (Dk)
3.1.1 Test methodology
4 Mechanical properties
Once you’re ready to choose a material, use the Sierra Circuits Material Selector tool to input criteria and get an easy-to-compare list of dielectrics with the right properties.