I think all halogen free laminates are tetra-bromo-bisphenol-A free. However, bisphenol-A is the co-momomer for epoxy, so if they are FR-4 (epoxy) they must still contain bisphenol-A. I think for flammability (pass UL 94-V0) the additives are aluminum oxide, nitrogen or phosphorus containing organics, etc.
I have attached the original IPC white paper on halogen free from 2002. I understand a lot of this was "voted down", as IPC wanted to take a different stance toward halogen free for Intel, Dell, HP, and others - who supply computers graded to the E-Peat scale, where halogen free is a major objective.
Is RIM now into making "my hand-held is greener than your hand-held" products? I guess my view that "halogen-free is bad science" attitude is showing through.
Denny
-----Original Message-----
From: Bev Christian <[log in to unmask]>
To: [log in to unmask]
Sent: Thu, May 13, 2010 2:19 pm
Subject: [TN] Halogen free laminate chemistry
Are all halogen free laminates bisphenol A free?
ev
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