"FR4 is essentially glass - epoxy resin laminate.with bromides

incorporated to provide self extinguishing properties.
Usually routed rather than punched.

CEM3 (more Japan and some other Asia) is glass-epoxy but instead of a
woven fabric as in FR4 uses random non woven glass fibres. Instantly
distinguishable by its white colour. Equally as good as FR4."


So under what conditions might a person choose CEM3 over FR4? Is it=20
suitable for SMT?

???

Mark Skeels
Engineer
Competition Electronics, Inc.
TEL: 815-874-8001
FAX: 815-874-8181
www.competitionelectronics.com


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