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BPOWERS
01-19-2005, 12:15 PM
Is standard FR4 manufactured "Halide" free
i was asked this question because of leadfree criteria.
Skip Yutkus
01-19-2005, 02:01 PM
No,

You have to specify special material - the Bromine based fire retardant is a Halide.

Skip
loydtarrosa
05-26-2005, 08:03 AM
There are FR-4 materials that can be classified as halogen free.

FR means flame retardant (to UL94V-0) and 4 indicates woven glass reinforced epoxy resin structure. The flame retardant is mainly bromine (halogens) which was historically one of most efficient ways to improve flame retarding properties of polymers.

LG Chem has a version of a halogen free FR-4 laminate and prepreg. You could visit their site at http://www.lgchem.com/en_products/electromaterial/pcm/hfm/lg-e-481.html