Chemistry:Composite epoxy material
From HandWiki
Composite epoxy materials (CEM) are a group of composite materials typically made from woven glass fabric surfaces and non-woven glass core combined with epoxy synthetic resin.[1][2] They are typically used in printed circuit boards.[3]
There are different types of CEMs:
- CEM-1 is low-cost, flame-retardant, cellulose-paper-based laminate with only one layer of woven glass fabric.[4]
- CEM-2 has cellulose paper core and woven glass fabric surface.
- CEM-3 is very similar to the most commonly used PCB material, FR-4. Its color is white, and it is flame-retardant.[5]
- CEM-4 quite similar as CEM-3 but not flame-retardant.
- CEM-5 (also called CRM-5) has polyester woven glass core.[6]
See also
References
- ↑ Inc, ANSYS. "Characterization of CEM-1 Boards" (in en). https://www.dfrsolutions.com/characterization-of-cem-1-boards.
- ↑ Andy (2023-05-02). "Composite Epoxy Material | What You Need to Know - FR Fabric" (in en-US). https://frfabric.com/alkali-resistance/.
- ↑ admin. "FR1-FR3, CEM1-CEM3,FR4, Aluminum Flex CCL introductions | PCB Blog" (in en-US). http://caringcircuit.com/blog/ccl-fr1-fr-3-cem-1-cem-3-fr4-aluminum-flex/.
- ↑ "Why Is Cem-1 PCB Material still Popular in the Circuit Board Market ?" (in en-US). 2018-03-14. https://www.kingshengpcba.com/pcb-assembly/pcb-and-pcba/.
- ↑ "CEM-1 PCB" (in en-US). https://www.venture-mfg.com/cem-1-pcb/.
- ↑ PCB Directory Editorial Team (12 July 2019). "What are Composite Epoxy Materials (CEMs)?". https://c-alley.com/.
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