PCB Materials - Classification by Resin

1.Paper - based Phenolic Board

It includes XPC, XXXPC, FR - 1 and FR - 2, and is composed of phenolic resin and fiber paper.

2.CEM - 1/CEM - 3

Glass cloth is used on the surface. The core of CEM - 1 is fiber paper, and the core of CEM - 3 is glass felt.

3.FR - 4 Material

It generally refers to the substrate with glass cloth base impregnated with epoxy resin.

4.High - performance Material

Other special/non - phenolic/non - FR - 4 resin - based substrates also include newly - developed materials such as Aramid and RCC.

5.Halogen - free Material

Substrates using a halogen - free resin system are currently applied in CEM - 1, CEM - 3 and FR - 4.

About the Author

David Lee

PCB Technical Director

I'm David Lee, PCB Technical Director at PCBMASTER with 17+ years of experience in PCB engineering. I specialize in high-speed/RF design, DFM optimization, SI/PI validation, and mass-production engineering, leading cross-functional teams to solve complex design-to-manufacturing challenges. I focus on delivering high-performance PCB solutions that balance electrical performance and manufacturability.

Visit David Lee's Profile