I believe you will find that the bromine in the flame retarding (FR-4) resin
is bonded to an a part of an organic compound and can not be released by
normal processes except burning the resin.  Bromine and Chlorine are from
the same group of elements in the periodic table and are both strong acids.
IMO chlorides and bromides should both be viewed as ionic contaminates and
need to be removed.
 ----------
From: Ozark Circuits
To: [log in to unmask]
Subject: [TN] Ionic Contamination due to No-Clean Fluxes
Date: Monday, October 12, 1998 8:03AM

I have a customer who is concerned about Ionic contamination due to
bromines/bromides. I have explained to the customer that the flame
retardant in FR-4 material is based on bromine. Also, the flux that we use
for the HAL is Hydrobromic Acid based, this is used instead of Hydrochloric
Acid based flux to cut down on the chloride contamination.

If anyone has information concerning this subject, I would appreciate any
and all information. I can be contacted at:

Scott Foley
Environmental & Process Manager
Ozark Circuits, Inc.
933 W. Chase
Springfield, Missouri 65803
Phone: 417-864-5004
Fax:   417-864-4072
email: [log in to unmask]

################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following
text in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section
for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or
847-509-9700 ext.312
################################################################

################################################################
TechNet E-Mail Forum provided as a free service by IPC using LISTSERV 1.8c
################################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in the body:
To subscribe:   SUBSCRIBE TechNet <your full name>
To unsubscribe:   SIGNOFF TechNet 
################################################################
Please visit IPC's web site (http://www.ipc.org) "On-Line Services" section for additional information.
For technical support contact Hugo Scaramuzza at [log in to unmask] or 847-509-9700 ext.312
################################################################