Composite epoxy material
From Wikipedia, the free encyclopedia
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 to CEM-3 but not flame-retardant.
- CEM-5 (also called CRM-5) has polyester woven glass core.[6]
See also
- Micarta – Brand name for a fabric-plastic composite
- Fibre-reinforced plastic – Composite material made of a polymer matrix reinforced with fibres
