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Flexible PCB supplier china:What are CEM-1 PCB Boards

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Popularity:551Dated :08-23-2021 06:31【big well Small

PCB boards in Flexible PCB supplier china that use two layers of woven glass fabric and paper (cellulose) along with epoxy as the substrate material are called CEM-1 PCB boards. This material is milky white or milky yellow in colour with a smooth finish and used for single layer PCB fabrication only since it’s not compatible with plated through hole (PTH) technology.

CEM-1 provides excellent electrical and mechanical properties and is compatible with the lead-free reflow technology since it has a higher transition temperature than FR-4. It also has a superior flexural strength i.e. the ability of the dielectric to handle physical stress without breaking. CEM-1 is non-toxic and halogen-free and doesn’t contain phosphorus and antimony. It also holds good dimension stability as well.

The main disadvantages of the CEM-1 substrate when compared to FR4 are its mechanical characteristics which result in very fragile boards.

 

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